Eisseman Magnetos

MM•4002
HA NDBOOK
WITH
OF INSTRUCTIONS
PARTS CATALOG
for the
A M•SERIES
of
EISEMANN MAGNETOS
MODELS AM-1, AM-2H, AM-2N, AM-4, AM-6
A
PRODUCT
OF
JACK & HEINTZ PRECISION INDUSTRIES, INC.
CLEVELAND
1,
OHIO
APRIL, 1947
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TABLE OF CONTENTS
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Page
Section
I.
....
Il.
Ill.
IV.
'·
V.
VI.
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VII.
VIII.
-
INTRODUCTION
·---
DESCRIPTION
1
1
2-1.
General Description .
1
2-2.
Detailed Description
2
INSTALLATION
5
3- 1.
Flange Mounted Magnetos
5
3-2.
Base Mounted Magnetos
6
OPERATION
7
4- 1 .
Principles of Operation
7
4-2.
Operation Instructions .
9
SERVICE INSPECTION AND LUBRICATION
10
5- l .
Service Inspection
10
5-2.
Lubrication
10
5-3.
Service Troubles and Remedies
11
MAJOR OVERHAUL .
13
6- 1 .
Overhaul Tools Required
13
6-2.
Disassembly, I nspection, and Cleaning
13
6-3.
General
13
6-4.
Disassembly of Distributor Plate
13
6-5.
Removal and Disassembly of the Impulse Starter
15
6-6.
Removal and Disassembly of End Plate
15
6-7.
Disassembly of M agneto Rotor Shaft Assembly
16
6-8.
Disassembly of Magneto Housing Assembly
17
6-9.
Cleaning
17
6- 1 0. Reassembly o f Component Parts
17
6 - 1 6. Running Test
21
PARTS CATALOG INTRODUCTION
22
GROUP ASSEMBLY PARTS CATALOG
23
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Section I, 11
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SECTION I
INTRODUCTION
1 -:L Xi?,is l{andbook with Parts Catalog contains descriptive data and
instructions for Installation, Operation, Inspection, Maintenance, Over.
haul and Test of the Eisemann AM-Series magnetos manufactured by
Jack and Heintz Precision Industries, Inc., Cleveland 1 , Ohio.
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1-2. The Parts Catalog included in this Handbook contains exploded
views of a typical Model AM-4 Magneto and a parts list for identification
of all procurable items in each model of the entire AM-Series.
1-3. All work performed on these magnetos should be carried out by
qualified mechanics and in properly equipped repair shops; preferably
an authorized Eisemann Service Station.
ATTEMPTED REPAIRS OR ADJUSTMENTS BY UNTRAINED PER­
SONNEL MAY ENDANGER H UMAN LIFE AND MAY ALSO RESULT
IN COSTLY REPLACEMENTS.
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SECTION
11
DESCRIPTION
2-1. GENERA L DESCRIPTION .
a. The magnetos covered by this Handbook are of
the rotating magnet, high tension type,. designed to
provide efficient ignition over a wide range of appli­
cations. Figure 2 · 1 shows a representative type of each
model in the AM-Series of Eisemann Magnetos. This
series consists of Models AM-!, AM-2H, AM-2N,
AM-4, and AM-6. A grounding switch is shown at ·
tached to the ground terminal of each model in the
series except the Model AM-2H. This does not indi­
cate that a switch may not be used with the Model
AM-2H, but rather to show the appearance of a mag­
neto without such a switch. It is more convenient in
many installations to employ a suitable remote con­
trol magneto switch, such as, the Eisemann Grounding
Switch. If it is desired to use either type of switch,
reference to the Parts Catalog Section of this Hand­
book will enable the selection of the proper switch
with regard to the correct application.
MODEL AM-1 :-Supplied with a single-lobe cam
and single-pawl impulse starter, designed to be
driven at cranks haft speed on 2-cycle engines; and
crankshaft, or camshaft speed, on 4-cycle engines.
If driven at crankshaft speed on 4-cycle engines the
unused sparks will occur in the exhaust stroke.
MODEL AM-2H:-Supplied with a single-lobe cam
and single-pawl impulse starter to be driven at
crankshaft sreed on 4-cycle, 2-cylinder engines
firing at 360 intervals.
MODEL AM-2N:-Supplied with 2-lobe cam and
2-pawl impulse starter, gearless spark distribution,
driven at crankshaft speed on 2-cycle, 2-cylinder
engines firing at 1 8 0°- 180° intervals; driven at cam­
shaft speed on 4-cycle, 2-cylinder engines firing at
360° intervals; driven at cran kshaft sreed on 4cycle, 2-cylinder engines firing at 1 80 -540° with
unused sparks occurring in the exhaust stroke.
MODEL AM-4:-Supplied with a 2-lobe cam and
2-pawl impulse starter, being available in either
carbon brush or jump-spark distribution, and
driven at engine speed on 4-cycle, 4-cylinder en­
gines.
MODEL AM-6:-Supplied with a 2-lobe cam and
2 -pawl impulse starter, jump-spark distribution,
and driven at one and one half times crankshaft
speed on 4-cycle, 6-cylinder engines.
b. The different models of the AM-Series magnetos
may be obtained with various types of mounting ar­
rangements and equipped with impulse starters if re­
quired. Impulse starters are used to insure the best
characteristics for starting under all conditions, by
providing automatic spark retardation and a spark
of high intensity at the instant when needed. The im­
pulse starter should 9e selected with reference to the
direction of rotation and proper lag angle as specified
by the engine manufacturer. Magnetos of the AM­
Series are selected with regard to the type of engine
Section 11
Paragrap hs 2-1, -2
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Figure 2-2. Mounting Arrangements .
mounting; namely, base mounting, or flange mount­
ing as illustrated i n figure 2-2. Two types of base
mounting magnetos are obtainable: ( 1) 3 Smm. base
and (2) 45mm. base. Flange mounting magnetos are
designated as follows: ( 1 ) Vertical Flange (S.A.E.
tractor standard); (2 ) Small Vertical Flange (Wiscon­
sin AA and AB engines and other special applica­
tions); (3) Horizontal Flange (S.A.E. aircraft stand­
ard two bolt mounting). Flange mounting magnetos
are offered with three different lengths of rotor shafu:
( 1 ) s tandard length for use where magneto drive
gear is carried on a shaft in the engine; (2) an extend­
ed shaft for use where magneto drive gear is carried
by the magneto shaft (a hardened steel gear bushing
and thrust washer are i ncluded with magnetos having
extended rotor shafts); and (3) S.A.E. aircraft sh aft
for use where the engine does not require an impulse
starter.
c. All AM-Series magnetos mount the magnet rotor
on 1 5mm. ball bearings. For magnetos requiring gear­
ed distribution, the distributor rotor shaft is mounted
in a permanently lubri cated Oilite type bushing.
2-2. DETAILED DESCRIPTION.
a. Figure 2-3 is a cutaway view showing the internal
construction of the Model AM·4 Magneto. Reference
numbers are provided for the principal parts illus­
trated.
b. The housing ( 1 ) is a high quality aluminum alloy
die casting with laminated electric steel pole shoes.
The housing supports and locates the coil (11), the
end plate (27), the outer race of the front ball bear­
ing (3) for the magnet rotor (2), the housing venti­
lator, and che impulse scarcer catch pin (when re­
quired), as well as the oil seal (4) (on flange mounted
magnetos), or the dust seal (on base mounted mag­
netos) for the rotor shaft.
c. The coil ( 1 1 ) i s constructed of a specially treated
2
primary and secondary winding of very high effi­
ciency, mounted on a laminated electric steel coil core
( 1 0). The ends of the coil core are precision ground
to match the conical taper bored in the pole shoes i n
the housing. This conical taper provides a locating
seat for the coil in the housing and minimizes the
magnetic resistance between coil core and pole shoes.
The coil is further secured i n the housing by means
of two spring clamps over the ends of the coil core
which are fastened to the housing by four screws and
lock washers. One end of the primary and one end
of the secondary winding are connected to the con­
denser (2 1 ). The other end of the primary winding
is grounded by a lead fastened under one of the coil
fastening spring clamps. The high tension end of the
seco ndary is connected to the high tension terminal
( 1 3) on the coil. On some applications, a different
coil is required, in which case the ground lead is at­
tached to the coil core.
d. The end plate (27 ) is an aluminum alloy die cast­
ing and is secured to the housing by three fillister
head screws and lockwashers. The end plate locates
and supports the rotor bearing on the breaker end
of the magnet rotor shaft (2), the Oilite bronze distrib­
utor rotor bearing (16), the distributor rotor and gear
assembly ( 1 7 , 1 8), the breaker assembly (25), and
the condenser (2 1 ).
e. The distributor rotor ( 1 8 ) is made of a special
plastic material of high dielectric strength i nto which
the distributor electrode (19), and the rotor shaft are
integrally moulded. On some models, the distributor
electrode is removable, being held in place with a
spring clip. The distributor rotor is driven by a linen
bakelite gear ( 1 7), riveted to the back face of the dis­
tributor rotor. jThis assembly is located and secured
in the distributor bearing by two thrust washers, shims
as applicable, and a s nap ring. AM-2N models are
designed for gearless spark distribution and have the
distributor on the magnet rotor shaft.
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Section 11
Para9raph 2-2
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2.
3.
4.
5.
6.
7.
8.
9.
Impulse Spring
10.
11.
12.
13.
14.
15.
16.
17.
Impulse Drive Cup
18.
Housing
Magnet Ro10r Shaft
Ball Bearing
Oil Seal
Oil Stinger
Woodruff Key
Flange Assembly
Coil Core
Coil
Gasket
High Tension Terminal
Coil Concaccor
High Tension Pickup
Oilite Rowr Bearing
Discribuwr Gear
Distributor Rotor
19. Discribuwr Electrode
20.
2 l.
22.
23.
24.
2 5.
26.
2 7.
28.
Carbon Brush & Spring
Condenser
Pinion Gear
Ground Terminal Assembly
Cam Follower
Breaker Assembly
Contact Points
End Place Assembly
Distributor Place
Figure 2-3. Cutaway View of the AM-4 Magneto.
3
Section 11
Parag ra p h 2-2
pieces and the rotor shaft integrally cast in aluminum
alloy as indicated in figure 2-4 which shows a trans­
verse section of the magneto. This complete unit is
machined and ground •o very close tolerances to as­
sure accurate timing and a minimum air gap between
the rotor pole pieces and the pole shoes in the hous­
ing. The magnet rotor is carried in the rotor tunnel
on two separable-type ball bearings located in the
housing (1) and the end plate (27) respectively.
Accurate bearing adjustment is accomplished by means
of shims located· behind the inner races of the ball
bearings. The drive end of the rotor shaft passes
through the oil seal (4) and carries the oil slinger
(5) (flange mounted magnetos) or through a suitable
dust seal (on base mounted models). The impulse
starter, drive gear bushing and drive gear may be
mounted on the extension of the rotor shaft. Positive
driving and accurate location of these u nits is assured
by the woodruff key (6) and the taper on the shaft.
The cam and the pinion gear (2 2 ) where required
are positioned and secured on the breaker end of the
rotor shaft by a shoulder, a woodruff key, a nut, and
lockwasher. On applications where a h ardened steel
cam is req uir ed instead of an oil-impregnated cam,
an oil wick is also mounted on the end plate.
Figure 2-4. Transverse Section of Magneto.
f. The breaker (2 S.) is of the pivotal type which
permits adjustment without changing the relation­
ship between the contact surfaces of the points (26).
The cam-follower (24) is accurately machined to con­
form to the breaker cam contour. The flexible bronze
conductor strap insures proper electrical conducti­
vity.
g. The condenser (2 1 ) is a hermetically-sealed,
metal-cased rolled-section type, thoroughly impreg­
nated with a high heat and vibration resisting com­
pound. A spacing bushing, a slotted nut and lock
washer are used to position and secure the primary
and secondary leads from the coil and the breaker
lead, to the condenser terminal post. The ground
connection is made through the integral mounting
bracket which is secured to the condenser mounting
bosses on the end plate (27) by two screws and lock
washers.
h. The magnet rotor (2) is constructed of a high
output alnicq magnet, laminated electric-steel pole
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Base-mounted AM-Series magnetos are equip­
ped with a felt type dust seal at the drive end.
The flange mounted models are equipped with
an oil seal and oil slinger at the drive end.
i . The distributor plate (28 ) is a high quality, plas­
tic unit possessing high dielectric and thermal proper­
ties, as well as being resistant to abrasion. It contains
an integral high tension pickup (15 ), distributor
electrodes, and the contact spring ·and ground ter­
minal assembly (23). The coil contactor (14) consists
of a compression spring and a sleeve eyelet placed
over the high tension pickup to insure positive con­
tact with the high tension terminal ( 1 3) of the coil.
A carbon brush and spring (20) connect the high
tension pickup with the rotating distributor electrode
(1 9). The spark plug cables are inserted in the dis­
tributor plate by firmly pressing the cables into the
proper cable holder being sure that the cable clip
bottoms in the cable holder. A gasket ( 1 2 ) is used
between the housing ( 1 ) and the distributor plate
(2 8 ) to insure the exclusion of all foreign substances.
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Section Ill
Paragraph 3·1
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SECTION Ill
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INSTALLATION
3-1. FLANGE M
. OUNTED MAGNETO S .
(See .figure 3-1)
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a. On flange mounted magnetos, when the magneto
drive gear is to be mounted on the magneto rotor
shaft, care should be exercised to insure the proper
order of assembling these members, by noting the
following sequence:
(1)
(2)
(3)
(4)
( ;)
I nstall
I nstall
I nstall
I nstall
Install
impulse coupling retaining washer.
gear bushing.
drive gear.
gear thrust washer.
drive shaft nut.
(In some instances the gear thrust washer and drive
shaft out are combined in a single unit). Securely
tighten the drive shaft nut and lock with a suitable
cotter pin. Be sure that the drive gear does not bind
and is free to move upon i ts bushing. To tighten the
drive shaft nut, the magneto drive gear may be held
in a soft-jawed vise.
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b. When installing the magneto on the engine,
make sure that the piston in number-one cylinder is
in the correct timing position as specified by the en­
gine manufacturer.
c. Remove the distributor plate from the magneto
and turn the magneto rotor shaft until the distributor
electrode is in the correct position for firing number
one cylinder. (If the magneto is equipped with an
impulse starter, the rotor shaft should be turned i n
a direction opposite· that of normal rotation· i n order
to avoid engagement of the impulse starter).
d. When a magneto is equipped with a driving gear,
the timing mark on this gear should be aligned with
the corresponding timing mark on the engine gear.
If the mark on the magneto drive gear does not line
u p, the magneto drive gear should be removed from
the drive shaft and rotated 1 8 0 degrees and then
reassembled.
e. Tighten the magneto mounting screws suffi­
ciently to hold the magneto i n place but not tight
enough to prohibit the movement of the magneto
around its drive shaft.
Connect one cable of a suitable timing i ndicator to
the ground terminal and the other cable to the magneto
frame. Rotate the magneto o n the flange pilot until
the timing indicator shows that the contact points are
just separating. Keep the magneto in this position
and securely tighten the mounting screws.
f. Replace the magneto distributor plate, being
careful that the center carbon brush makes proper
contact with the center of the distributor rotor and
the high-tension pickup eyelet makes proper contact
with the high-tension terminal on the coil.
g. Install high tension cables from the magneto to
the spark plugs, being careful that the cables from the
magneto connect with the proper s park plug in ac­
cordance with the firing order of the engine.
2.468 R.
Figure 3-l. Dimensional Drawing for Typical Flange Mounted Magneto.
5
Section Ill
Paragraphs 3-1, -2
.-----CAUTION------,
The firing order of the magneto is a direct
sequence starting from number one which is
indicated on the distributor plate, i.e. The
cable from number one terminal on the mag­
neto distributor plate should go to the num­
ber one cylinder on the engine; the second
terminal on the distributor plate in the proper
magneto firing sequence, as determined by
the direction of rotation of the magneto,
should be connected to the second cylinder
in the firing order of the engine (not neces­
sarily number two cylinder); number three
terminal of the distributor plate should be
connected to the third cylinder as specified
by the engine firing order, etc.
h. Where grounding switches are mounted other
than on the magneto, be sure that proper connections
are made between the ground terminal of the magneto
and switch.
3-2. BASE MOUNTED MAGNETOS.
(See figure 3-2)
a. When installing base-mounted magnetos, be sure
that the piston in number one cylinder is in the cor­
rect timing position as specified by the engine manu­
facturer and that the magneto distributor rotor is i n
the correct position for firing number o n e cylinder,
as outlined above for the installation of flange mount­
ed magnetos.
b. Base mounted magnetos are usually driven by
means of an assembly consisting of three parts,
namely:
( 1 ) "Adjustable Drive Member" fastened to en­
gine shaft
(2) Intermediate member designated "Floating
Disc"
(3) Impulse Starter or Flange attached to magneto.
Various combinations of the above drive members
together with the different positions of mounting holes
in the base of the magneto permit a wide range of
applications.
c. Mount the magneto adjustable drive member on
the engine shaft, being sure that the woodruff key is
properly seated. Place the floating disc over the drive
lugs of the impulse starter while maintaining the cor­
rect number one firing position of the magneto drive
shaft. Place the magneto with the floating disc in­
stalled, on the engine magneto mounting pad. If the
driving lugs of the adjustable drive member do not
line up with the slots in the floating disc, DO NOT
ROTATE THE MAGNETO ROTOR SHAFT, as this
will move the magneto out of its correct position for
firing number one cylinder. Line up the drive lugs of
the adjustable drive member with the slots in the float­
ing disc by unlocking the drive member and rotating
the drive lugs in the direction required, until the
proper alignment with the slots in the floating disc
is obtained. Slide the magneto forward toward the
adjustable drive member until complete engagement
of drive lugs is obtained in the slots of the floating
disc. Insert the magneto fastening screws through
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Figure 3-2. Dimensional Drawing for Base Mounted Magneto (Model AM-2N).
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Sections Ill, IV
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the mounting pad holes into the base of the magneto,
and securely tighten.
d. For correct timing, the breaker points should
be just starting to open. The final timing adjustment
of the magneto to the engine can be obtained by
rotating the adjustable drive member in the desired
direction of rotation to obtain the proper timing as
mentioned in the preceding paragraph. Before locking
the drive member to the engine shaft, be sure that a
slight amount of clearance exists between the drive
member, floating disc, and the face of the impulse
starter. This should be approximately Ys4 inch and
can be obtained by sliding the drive member on the
engine shaft in the desired direction. Under no cir­
cumstance should the floating disc be without clear-
ance, as it will tend to bind and cause improper im­
pulse operation. Also if the clearance is too great,
proper engagement of the driving lugs into the float­
ing disc will not be obtained and undue wear will
occur. After final adj ustments have been made, securely
lock the adj ustable drive member on the engine shaft.
e. In order to install the high tension cables from
the magneto to the s park plugs, follow the instruc­
tions as outlined above for the flange mounted mag­
netos.
f. Where grounding switches are mounted other
than on the magneto, be sure that the proper connec­
tions are made between the ground terminal of the
magneto and switch.
SECTION IV
OPERATION
4-1.
PRINCIPLES OF OPERATION .
a. The AM-Series magnetos are designed for a wide
range of application. Standard applications of this
series include magnetos for use on tractor, marine,
industrial, and special engines, with horsepower rat­
ings ranging from fractional to several hundred horse
power. Special modifications of the AM-Series are also
available for use on light aircraft engines where radio
shielding is not required.
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b. Basically, the magneto is a combination of an
alternating current generator, a step-up transformer,
circuit breaker and distributor to provide the high
voltage ignition spark for each cylinder. (See figure
4-1.) The magneto rotor carries a two pole permanent
magnet (8) with laminated pole pieces. This magnet
assembly rotates in the tunnel of the main housing
which includes laminated pole shoes. These pole shoes
are bridged at their upper ends by the laminated coil
core (13) to complete the magnetic circuit. The direc­
tion of magnetic flux through the coil core is reversed
twice for each revolution of the magnet rotor. When
the primary circuit ( 1 2 ) is completed by closing the
breaker contacts ( 1 9), a current is generated in this
winding by the reversals of flux in the coil core as the
magnet rotor revolves. The current thus generated
represents energy which is stored in the magnetic
circuit due to changing the magnitude and direction
of the flux. Interruption of the low voltage primary
circuit by opening the breaker contacts releases this
scored energy and allows the flux eo collapse rapidly.
The rapid collapse of the primary flux induces a high
voltage surge in the secondary winding ( 1 1 ), thus
providing the ignition s park.
.c. The breaker assembly ( 1 6) is mechanically actu·
ated by a cam ( 1 7) mounted on the magnet rotor shaft.
The breaker cam is designed to open and close the
breaker contacts in proper relation to the position of
the magnet rotor, thereby producing the maximum
obtainable value of high voltage surge. A condenser
( 1 5 ) is connected in parallel with the breaker con­
tacts in order to suppress arcing at the contact points
when the primary circuit is interrupted.
d. In the j ump-spark method of distribution, a gap­
type rotating switch is used and no actual contact is
made. The distributor rotor is timed eo the magnet
rotor by means of gearing (6 and 7) so that the rotat·
ing electrode (4) is aligned with each consecutive
distributor plate electrode ( 5 ) at the instant the sec­
ondary voltage attains the maximum value. In this
manner, the high voltage surges will jump across the
small air-gap and pass through the terminal and asso­
ciated cable (1) to serve the proper cylinder at the
correct time. The model AM-I does not require a
distributor and the AM-2N uses the carbon brush type
of distribution , whereas the jumpspark distribution
is becoming standard construction on the remaining
models of this series, namely Model AM-2H, AM-4,
and AM-6. However, there are thousands of magnetos
in the field giving completely satisfactory performance
with carbon brush distribution and it is required on
some special applications.
7
Section IV
Paragraph 4-1
TO SPARK
PLUGS
2
3
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1.
2.
3.
4.
5.
6.
High Tension Cable
Cable Insert
Carbon Brush and Spring
Distributor Rotor Electrode
Distributor Plate Electrode
Distributor Gear
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Pinion Gear
Magnet Rotor
Coil Contactor
High Tension Terminal
Coil-Secondary Winding
Coil-Primary Winding
Breaker Condenser Lead
Condenser
Breaker Assembly
Breaker Cam
Ground Terminal
Contact Points
Coil-Core
Figure 4- J. Schematic Diagram of Electric and Magnetic Circuits.
position, i n order to ground, or short-circuit the mag­
neto primary. The various types of switches and the
magneto models on which each is used is illustrated
i n figure 4-2.
e. Switches commo nly used for battery ignition are
not suitable for magneto ignition systems. The switch
used in battery ignition OPENS the circuit in the
"OFF" position, whereas in the magneto ignition sys­
tem the switch must CLOSE the circuit in the "OFF"
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H24-026
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H24-028
·
SWITCH
USED ON
NUMBER
MOOEL
H24-026
AM-I
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AM-4 -6
,
H24·027
H24·028
AM-I
H24-029
AM-2N
H26-468
AM-4
-
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H24-029
Figure 4-2. Short Circuiting Switches.
H24-027
Ju
H26-468
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Section IV
Paragraphs 4-1, -2
,
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f. In many installations, it is desirable to include
an impulse starter on the magn eto. The impulse starter
is an automatic device, which operates only during
engine starting, and serves a twofold purpose. It auto·
matically retards the timing of the ignition spark to
prevent engine "kicking", and it intensifies the spark
to insure easy starting. The impulse starter is essen­
tially two halves of a coupling unit; one half (the drive
cup) engages with a corresponding drive member on
the engine, while the other half (the flange) is keyed
directly to the magneto ro tor shaft. The two parts of
the coupling are connected together by a strong
spring. Pawls, mounted on the flange, are pivoted so
that they engage a catch pin secured in the housing,
at starting speeds. During starting, this catch pin
temporarily locks the rotor during each revolution.
At the same time, the drive cup continues to turn with
the engine and wind up the connecting spring. The
pawls are then released by cams on the drive cup which
in turn permit the spring to unwind and drive the
magneto rotor at a relatively high speed to produce
a high in tensity spark for s tarting the engine. When
the engin e is running, centrifugal force acts on the
pawls to prevent their engagement with the catch pin.
Thus the impulse starter ceases to operate, automatic­
ally advancing the spark to its correct running posi­
tion, and becomes a direct driving coupling. On some
installations, it is necessary to consider the angle of
the driving lugs. While the number of parts in the
impulse star ter are relatively few, the variations re­
quired for specific installations are quite numerous.
Combinations of different drive cups with a variety
of flanges provide the required "lug" and "lag" angle
for specific applications. (Seejig11re 4·3). In some spe-
cial ins tallations (vertical mounting for example),
spring loaded pawls are required.
DIRECTION OF ROTATION
-
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..... , ,
.....,
..... ...... ........
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' ....)'.,
'
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II
HORIZONTAL AXIS
OF MAGNETO
l4G
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's.,.�
" 0"
-4"-4-"o
1''-lt
a
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"'os,.,.
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Figure 4-3. Typical Lag and Lug Angle Relation.
4-2. OPERATING INSTRUCTIONS.
The operation of the AM-Series magnetos is en­
tirely automatic. An ignition switch may be used to
stop the engine by short circuiting the breaker points.
�
I'
·,
9
Section V
Paragraphs 5-1, -2
SECTION V
SERVICE INSPECTION AND LUBRICATION
(
\
r----WARNING -----.
Under no condition should any work be performed on the engine while
the high tension cables are connected to the spark plugs from the mag­
netos, without first checking the following:
( 1 ) The ignition switch must be in the "OFF" position.
(2) The ignition switch must be properly grounded to the engine.
(3) The ground connection between the ignition switch and the
magnetos must be properly made.
5 - 1 . SERVICE INSPECTION.
a. Remove the ignition cables from the holders in
the distributor plate noting the firing order of the en­
gine and cylinder number of the cables. Note any
chafed or cracked cables, condition of cable clips and
brass inserts where it is necessary to replace cable
clips, the detailed operations are indicated in figure
5-l.
b. Remove the four screws which hold the distrib­
utor plate to the magneto housing and carefully re­
move this assembly from the magneto.
( 1 ) JUMP-SPARK TYPE. Clean by wiping inner
surface of distributor plate with a clean lint-free cloth;
remove any corrosion on the electrodes of the distrib­
utor plate and distributor rotor; inspect the carbon
brush and spring for freedom of movement in the
socket and to see that the outer end of the brush ex­
tends sufficiently beyond the socket to make proper
contact with the di s_ tributor rotor. The high tension
spring assembly on the distributor plate should be
free on the high-tension pick-up post.
(2) CARBON BRUSH TYPE. Clean by using a
lint-free cloth to remove any engine oil or other for­
eign material that may be deposited on the inner sur­
face of the distributor plate, or on the face of the
distributor rotor. After cleaning, thoroughly dry all
parts before reassembling. Never use an emery cloth,
sandpaper or other abrasive material in cleaning the
distributor plate, distributor rotor or breaker cam.
.---N
--- ote --------.,
Do not wash the distributor rotor bearing or
oil impregnated breaker cam in any solvent
because these are oil-impregnated perma­
nently lubricated parts.
c. A visual inspection should be made to insure that
the contact points are free from dirt, oil, or other for­
eign substances.
d. At regular inspection periods, check the adjust­
ment of the breaker contact points. The breaker is so
arranged that the contact point opening should be
within (.0 1 8 - .022 inches). In making this check,
the cam follower must be on the high portion of the
breaker cam.
e. If the contact opening is not between these lim­
its, loosen (but do not remove) breaker plate fastening
screw, and move the entire breaker assembly in either
direction-toward the .c am to increase gap, or away
from cam to decrease gap. Recheck gap after tighten­
ing breaker fastening screw. Do not disturb hexagonal
nut holding breaker tension springs .
.---N
-- ote --------.,
If it is found necessary to re-adjust the contact
points, the magneto timing to the engine
should be rechecked as outlined in Section
I ll.
Figure 5- J. Attaching Terminal Clips.
10
(
5-2. LUBRICATION .
a. The ball bearings of the magneto are packed with
high melting point grease (Texas Company's Regal
Starfak No. 2), and should require no further lubrica­
tion, except when the magneto is disassembled for
overhaul.
\..
Section V
Paragraphs 5-2, -3
:'
'.
b. The· bronze distributor bearing and sintered­
steel breaker cam are both oil-impregnated and there­
fore are permanently lubricated and require no further
attention. On those magnetos e q uipped with a harden­
ed ground steel cam, a single d rop of medium grade
high quality engine oil should be applied to the break­
er cam wick as required.
.---C
--- AUTION
Do not add any lubricant to any oil-impreg­
nated part. Do not wash these parts in any
grease solvent.
b. In most instances, tampering with magnetos by
inexperienced personnel does more harm than good.
Therefore, if a magneto performs in a questionable
manner, it is advisably to refer the magneto to an ex­
perienced magneto repairman-preferably to an Eise­
mann Service Station.
c. Common troubles, their corresponding causes
and remedies are listed below. If these remedies fail
to overcome the difficulty, the magneto should be re­
moved from the engine and inspected according to
the instructions given in Section VI of this Handbook.
�---N
-- ote -------,
5-3. SERVICE TROUBLES AND REMEDIES .
a. Before a magneto is assumed to be defective and
the cause of possible ignition trouble, the spark plugs,
high tension cables, switches, and connections should
be carefully checked and tested.
TROUBLE
ENGINE FAILS TO START
Be sure that the trouble is due to the magneto
before removing the magneto from the en­
gine.
PROBABLE CAUSE
Short circuit in ground lead or
switch.
REMEDY
Remove ground lead from the
magneto and test ground lead
and switch.
Moisture on magneto distributor
Thoroughly dry all internal parts.
plate.
Improper timing of magneto to
engine or internal timing of
magneto.
OPERATES ERRATICALLY
Loose
connections
timing specifications and instal­
lation section of this handbook.
Clean contact points.
Dirty contact points
ENGINE IS ROUGH­
Refer to engine manufacturer's
in
magneto
primary circuit.
Check leads to condenser post
for
loose wires in terminals and
tighten round nut.
�
'
Improper timing of magneto to
Refer to engine manufacturer's
engine or internal timing of
timing specifications and instal­
n:agneto
lation section of"this handbook.
Moisture in magneto
Dry all dielectric
magneto.
Dirty contact points
Clean con tact points.
parts
of
11
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Section VI
Paragraphs 6-11 -4
SECTION VI
"
(
MAJOR OVERHAUL
I
6-1.
OVERHAUL TOOLS REQUIRED.
(See figure 6-1)
a. In addition to ordinary wrenches, screw drivers,
pliers, measuring tools, and an arbor press, the fol­
lowing special tools are required_.
- .
INDEX
�
'
6-2.
NOMENCLATURE
PART No.
APPLICATION
1.
H27-824
Spring Winding Tool
For assembling Starter
2.
H27-825
Spring Remover Tool
For disassembling Impulse starter
3.
H27-170
Bushing
For removing inner ball races
4.
H19-945
Thimble Sleeve
For protection of oil seal
5.
H19-937
Drift
For removing and replacing
6.
H19-923
Complete Puller
For removing outer ball races
7.
H19-934
Support Bushing
Used with Part
8.
H19-944
Catch Pin Installing
For installing Impulse starter
9.
H19-935
Tubular Drift
For assembling inner ball races
10.
H19-933
Support Block
Used in conjunction with Part No. H19932
11.
H19-999
Wrench
To hold Impulse starter
12.
H19-932
Drift
For assembling outer ball races to housing and end plate
13.
H19-940
Puller
Fo� removing catch pin
14.
H19-936
Reversible Arbor
For removing and replacing oil seal in
housing
15.
H19-995
Bearing Puller Set
For removing all bearings (Inner Race)
16.
H19-938
Base Plate
To
17.
H19-946
Puller
For removing Impulse starter
DISASSEMBLY, INSPECTION AND
CLEANING.
No.
H19-935
II
fit or remove distributor bearings
6-4. DISASSEMBLY OF DISTRIBUTOR
PLATE.
6-3. GENERAL.
a. The following instructions are given for the dis_.
assembly of the complete unit after it has been removed
from the engine.
a. Remove the four screws (1 and 2), lockwashers
(3), and plain washers (4), noting that two screws
are longer than the others. (See figure 6-2).
b. During disassembly, the condition of each part
should be carefully noted and such parts as may re­
quire replacement, should be obmined before starting
re-assembly. More detailed inspection will be noted as
required.
b. Slide the distributor plate off the magneto, noting
the dowel pins in the housing were used to align i t
with the magneto. Remove a n d inspect the gasket.
Replace it if necessary.
,.....--- Note -------.
Bearings should be replaced as a unit (outer
race, cage assembly and inner race).
c. For reference purposes, the principal sub-assem­
blies of a typical AM-4 Magneto are shown in Figure
6-2.
c. Remove the four screws (10), lockwashers (9),
filter hoods (8), filter screens (7), and filter gaskets
(6). (See figure 6-3). Clean all parts and replace any
that may be needed.
d. Examine the center distributor carbon (2) for
freedom of movement in the insert and for sufficient
length to insure contact with the center of the distrib­
utor electrode. Replace if necessary.
13
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Figure 6-2. Principal Sub-Assemblies.
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Figure 6-3. Distributor Plate Assembly.
14
Section VI
Paragraphs 6-4, -6
:
e. Inspect the spring sleeve and eyelet assembly (3)
for freedom of movement on the high tension pickup
post and that a good contact can be made with the
high tension terminal of the coil.
f. Check the binding post of the switch ( 1 5 ) for
tightness and condition of contact spring. O n some
distributor plates, the binding post or ground terminal
is moulded in place, while on others it is removable.
g. Clean and inspect the distributor plate electrodes.
Remove any corrosion and- carbon dust by the method
outlined in Section V of this Handbook.
h. Examine the distributor plate ( 1 ) for cracks or
other damage and replace if necessary.
6-5. REMOVAL AND DISASSEMBL V OF
THE IMPULSE STARTER.
a. Remove the cotter pin (1 4), and the drive nut
(13). (Seefigure 6-7). Remove the impulse starter
from the drive end of the magneto by using puller
(Tool No. H 1 9-946). While perforrr.ing this opera­
tion, exercise caution to avoid allowing the starter
spring to jump free.
l
b. I nsert the spring remover tool H27-825 i nto the
taper of the flange in the impulse starter.
c. Firmly holding the cup, slightly turn the tool so
that the spring is given a little additional wind-up.
d. Slowly pull the cup and flange assembly apart
until the cup is free to turn with respect to the flange.
e. Permit the spring to slowly unwind.
f. Examine the drive cup (3), the spiral sp ring (2),
and the flange and pawl assembly ( 1 ). (See pgure 6-4).
Replace any or all of the parts if necessary.
Figure 6-4. Impulse Starter Assembly.
6-6. REMOVAL AND DISASSEMBLY OF
END PLATE.
a. Remove the nut (2), lockwasher (3), and pinion
gear (4) from the breaker end of the magneto rotor
shaft. (See figure 6-7).
b. Remove the slotted round nut (21 ) from the
condenser terminal post ( 1 5 ) and remove the high
tension coil lead from the condenser. (See figure 6-.5).
c. Re�ove the three fillister-head screws (7) and
lock washers (6). (See figure 6-2).
d. Slide the end plate from the magneto rotor shaft
and housing, while noting the dowel pin used to align
the end plate to the housing.
e. Lift the breaker lead ( 1 9 ) off the condenser ter­
minal post and also the condenser spacing bushing
( 1 8). (See figure 6-.5).
1
� �-'
Figure 6-5. End Plate Assembly.
15
Section VI
Paragraphs 6-6, -7
breaker. Dressing with a file has generally proven
unsatisfactory.
(2) Spring tension-the tension of the breaker
spring should be between 1 0 and 1 8 ounces
when measured as indicated in Figure 6-6.
i. Remove the soap ring ( 1 4) from the groove in
the distributor gear and rotor shaft (4) by means of
a suitable snap ring tool. (See figure 6-5).
j . Remove th� s_hill! washer ( 1 3) and withdraw the
shafi: from the oilite bearing (3) .
k. Remove the shim washers (11 and 12) from the
inner end of the shaft.
Figure 6-6. Checking Breaker Spring Tension.
f. Remove the two screws ( 1 6) and lockwashers
( 1 7). Lift the condenser off the end plate ( 1 ) and test
it on any appropriate condenser tester, such as an
Alien E 1 9 1 , or a Weidenoff condenser tester. The
capacity of the condenser should be between 0 . 1 7-0.22
microfarads; a series resistance of not over 0.4 ohm;
a leakage resistance of not less than 5 0,000 ohms.
g. Remove the breaker adjusting screw (38), lock­
washer (37 ) , and plain washer (36). Remove lock
spring (35) and plain washer (34). Lift the breaker
off the brass pivot post of the end plate.
h. Inspect the breaker for the following:
( 1 ) Excessive burning, pitting, etc. of contact
points. If the contact points are unsatisfactory,
it is recommended that the complete breaker
assembly (22) be replaced. The dressing of con­
tact points is not generally advisable. However
in an emergency, contact resurfacing may be
accomplished by the use of a very fine, flexible,
carborundum stone known as "Flexstone". The
stone should be thin enough to dress the con­
tact points in their assembled condition on the
1. Inspect the distributor rotor assembly (4) for
wear on the electrode and for tightness to the distrib­
utor gear. Check the d istributor gear. If necessary,
replace the entire assembly.
m. If the distributor rotor bearing (3) requires
replacement, it can be removed by placing the end
plate, outer race side up, on base plate fixture (Part
No. H 1 9-938). Line up the bearing with the hole in
the base plate, and place drift (Tool No. Hl9-937)
in the bearing hole and press out bearing.
n. If the outer ball bearing race (2) is scored or
otherwise damaged, it should be removed from the
end plate by using bearing puller (Tool No. H 1 9923).
o. Inspect the end plate for dama �e, condition of
dowel pins (if installed) and replace 1f necessary.
6-7. DISASSEMBL V OF MAGNETO ROTOR
SHAFT ASSEMBLY (See figure 6-7)
.
a. Remove the breaker cam ( 5 ) , and the Woodruff
key (6) from the breaker end of the magneto rotor
shaft ( 1).
b. Slowly press drive-end of shaft out of the hous­
ing until the oil slinger ( 1 1 ) is free. Remove the
slinger.
o@
�'""'- :.
O
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c;
•
C»
t)
16
Figure 6-7. Rotor Shaft A ssembly
.
..
ol
Section VI
Paragraphs 6-7, - 1 1
r
I
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e;,Ci'
14� �1
If:?�
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®
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t?(;)
Figure 6-8. Housing Assembly.
c. Remove the roror from the housing and take off
the two ball bearing cage assemblies (7).
d . Remove the two inner ball races (8) by means
of bearing puller (Tool No. H 1 9-995), if their con­
dition necessitates replacement.
e. If the inner ball races are to be removed, remove
the shims (9 and 10) from both ends of the rotor
shaft; noting the quantity and relative position.
6-8.
DISASSEMBLY OF MAGNETO HOUS­
ING ASSEMBLY. (See.figure 6-B)
a. Remove the four screws (6), lockwashers (7),
and the two coil clamps ( 1 5 ).
(
'
I
b. Remove the coil ( 1 4 ) from the housing ( 1 ) by
tapping the open end of the housing against a wooden
block, being careful not to damage the coil or the
dowel pin of the housing. The winding should be
tested on Eisemann Winding Tester (Tool No. H2 77 5 0), as sho·wn in Figure 6-9. Complete operating
instructions as well as coil data are furnished on cards
located in the case on the back panel of the winding
tester.
c. If the outer ball race (Item 5 of figure 6-8) needs
to be replaced, it may be removed from the magnetO
housing by using bearing puller (Tool No. H 19-92 3 ).
mantled and cleaned. Dry all parts thoroughly. Ex­
amine magnet rotor and housing tunnel in which the
rotor revolves, making sure both are free from metal
particles, burrs, chips or foreign matter.
6-10. REASSEMBLY OF COMPONENT
PARTS .
6-1 1 . REASSEMBLY OF MAGNETO
HOUSING .
a. Replace the ventilator screen, cover, and fasten­
ing screw.
b. Replace the outer ball race by using support
block (Tool No. H 1 9-933), and drift (Tool No.
H l 9-932) as s�own in figure 6 - 1 0. When replacing
outer ball races in old style housings, insure the
proper fit by using suitable insulating strips and
washers around and behind the bearing race (Refer
to parts catalog section for part numbers).
c. Install the coil, with core end radius, fitting into
corresponding radius in housing laminations. Install
the two coil clamps with the ground lead terminal
under the clamp. Fasten the two clamps with the four
screws and lockwashers.
d. To remove the oil seal ( 1 0), when necessary,
use reversible arbor (Tool No. H l 9-936).
-
e. If necessary, the catch pin (8) may be removed
for replacement by using catch pin puller (Tool No.
H 1 9-940). Note from which of the two holes in the
flange the pin was removed.
��:��.
- .\ �- -
f. Remove the ventilatOr screw ( 1 3), cover ( 1 2 ),
and screen ( 1 1 ) .
6-9. CLEAN ING .
Clean all parts thoroughly in a suitable solvent with
the exception of the condenser, coil, oil-impregnated
oilite bearing, and cam. Filter screens should be dis-
, w.
�
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11
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"';:.......
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;�
l'il
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it
I
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Figure 6-9. Eisemann Winding Tester.
17
Section VI
Paragraphs 6-12, - 1 3
the recess cut in the base plate (Tool No. H 19-938),
and with bearing hole toward the solid end of base
plate, use drift (Tool No. H 19-937) to press bearing
into the end plate (See figure 6-12). Stake the oilite
bearing to the end plate on the outer ball bearing
race side.
c. Replace the shim washers on the inner end of
the distributor rotor shaft and insert the distributor
rotor in the oilite bearing.
. .<! . Replace the shim washers, and the snap ring on
the other end.
.
e. Lightly lubricate the pivot pin and mount the
breaker assembly on the end plate. Replace the breaker
fastening screw, lockwasher, and fiat washer.
Hl9·933
SUPPORT BLOCK
f. Assemble the condenser to the end plate with the
screws and lockwashers.
6- 13. R EASS EMBLY OF MAGN ETO ROTOR
ASS EMBLY.
Figure 6- 1 0. Replacing Outer Race in Housing.
6-12. R EASS EMBLY OF END PLATE
ASS EMBLY.
a. Replace the outer ball race in the end plate by
using support block (Tool No. H 1 9·933) and drift
(Tool No. H l 9-932) as shown in figure 6- 1 1 . When
replacing outer ball races in old style end plate, in­
sure the proper fit by using suitable insulating strips
and washers around and behind the bearing race.
b. Replace the distributor rotor bearing by placing
the end plate with ball bearing side down and set in
H19-932
DRIFT
11
a. Replace the bearing end shims on the shaft.
b. Replace the two inner ball races by using tubular
drift (Tool No. H 1 9·935) and support bushing (Tool
No. H l 9·934) .
.----- Note -------,
If new bearings are required, it will be neces­
sary to recheck the rotor end play by the fol­
lowing procedure:
( 1 ) Assemble the ungreased ball cages on the
inner races.
(2) Place the rotor in the housing and as­
semble the end plate to the housing.
(3) Check rotor for freedom of rotation with
imperceptible end play.
(4) If necessary, reshim and recheck until the
proper bearing adjustment is obtained.
�
�-
����
H
7
H l9-933
SUPPORT BLOCK
Figure 6- 1 J . Replacing Outer Ball Race in End Plate.
18
Figure 6- J 2. Replacing Distributor Rotor Bearing.
\
Section VI
Paragraph 6-13
_.-·
ffl
c. Replace the oil seal in the housing by using re­
versible arbor (Tool No. H l 9-936) as shown in fig­
ure 6 - 1 3 .
d. Replace the catch pin i n the housing hole from
which it was removed by using catch pin installing
tool No. H l9-944.
e. Repack ball bearing cages with Texas Co. Regal
Starfak No. 2 grease or approved equivalent and re­
place on inner races.
f. Place sleeve Tool No. Hl 9-9 4 5 on the shaft taper
to protect the oil seal while replacing the rotor in the
magneto housing.
\
g. Fasten end plate to the housing with the three
screws and lockwashers.
h. Press oil slinger on drive end of rotor shaft by
using drift (Too� No. H 1 9-935) and support bushing
(Tool No. H 19-934). Leave a space of . 0 1 0 inch be­
tween oil slinger and housing using Tool No. H 19920.
i. Replace the Woodruff key on the drive end of the
rotor shaft.
j. Install the driving members (impulse starter,
etc.) using the reverse order of disassembly.
k. Replace the cotter pin.
l._
1. Replace the Woodruff Key and breaker cam on
the rotor shaft with the slots or directional arrow
facing outward or inward as required for the proper
magneto rotation. Note that most cams are reversible
and can be used for either clockwise or anti-clockwise
rotation. For anti-clockwise magneto rotation, the
slots must face in toward the bearing race.
m. Replace the pinion gear so that the timing mark
on the gear, lines up with the desired timing mark
(i.e. clockwise or anti-clockwise) on the distributor
gear. Secure the pinion gear with lockwasher and
hexagon nut.
n. Set the breaker contact points as described in
paragraph 5 - l . The correct internal timing of the
magneto is such that the breaker points open when
the edge gap "E" between the edge of the steel lami­
nations in the rotor and the edge of the steel lamina­
tions in the housing is between 1 . 5 - 3 . 5 mm (.05 9-. 1 3 8 )
inches. (See figure 6-14.)
.------ Note
--
-
-
-
Figure 6- 1 3. Replacing Oil Seal in Housing.
.----- CAUTION -----,
If the internal timing is not within the pre­
scribed limits, the complete breaker assembly
should be replaced. Always keep the breaker
free from oil, dirt, or other foreign substances.
o. Place condenser spacing bushing, coil and break­
er lead terminals, and lockwasher on the condenser
post. Lock securely with condenser nut.
EDGE
GAP
"E "
-------,
On applications not using impulse starters
where the H27-635 cam is supplied, the edge
gap limits are 0.2-2.2mm (.008-.086 inches).
The H27-635 cam may be identified by the
number " 7 " stamped on one end of the cam.
-
It is recommended that a timing light be used to
accurately check the point where the breaker contacts
begin to open. If a timing light is not available, it may
be necessary to use feeler strips, but these should not
exceed .00 1 5 inch in thickness and should be free
from oil or dirt of any kind. The use of feeler strips
for this purpose is not recommended for several rea­
sons. They do not give an accurate check, and, unless
kept absolutely clean, may leave a trace of oil or dirt
which has a tendency to foul the �ontact surfaces.
Figure 6-14. Checking Edge Gap.
19
Section VI
Paragraph 6-14
6-14. REASSEMBLY O F IMPULSE S TARTER .
a. Raise plunger "A" of the spring winding tool
(Part No. 27-824) and fasten in raised position with
screws "B". (See figure 6-15).
b. Slide the flange assembly on the shaft taper with
the pin C entering the spring-anchoring hole in the
flange. When sliding the flange on the taper, the pawls
should be fitted under the two ears provided for this
purpose on the shaft.
"
"
·
- c. Release screw "B" and slide plunger "A" as far
as it will travel. Retighten screw " B".
d. Place the anchoring hook on the inner end of
the impulse starter spring into the anchoring hole i n
the flange. Care should b e taken to insure that the
spring can be wound in the proper direction, since
the same spring is used for either clockwise or anti­
clockwise rotation. For clockwise impulse starters,
the spring should be wound by turning the tool han­
dle in a clockwise direction.
·c·
e. Lightly lubricate the spring with Regal Starfak
No. 2 grease.
Figure 6- 1 5. Spring Winding Tool (H27-824).
f. Rotate the shaft until the anchoring hook on the
outer end of the spring can be held in position by the
slot in plunger "A". With both the inner and outer
ends properly engaged, wind the spring by turning the
handle approximately one and one half revolutions
from the free position.
g. Position the drive cup so that the anchoring hole
of the cup slides over the anchoring hook on the outer
Figure 6- 1 6 . Eisemann Three Point Test Rack.
20
Section VI
Paragraphs 6-14, -16
?
iI
end of the spring and the cup interlocks with the flange
assembly.
h. Loosen screw "B", raise the plunger "A" and
retighten the screw.
i. Slide the impulse starter off the tool by appl y ing
pressure on the pawls of the flange, and push the d rive
cup into full engagement with the flange.
j. When properly assembled, the two ends of the
spring will be on· opposite· sidesJ of the cup.
6- 1 5 . REASSEMBLY OF DISTRIBUTOR
PLATE .
a. Replace the filter gaskets, screens, and filter
hoods with the four screws and lockwashers.
b. Replace the gasket between the distributor plate
and magneto housing; slide the distributor plate into
position, noting the dowel pins used for alignment.
c. Fasten the distributor plate to the magneto hous­
ing by means of the four screws, lockwashers, and
plain washers.
6-16. RUNNING TEST .
a. Mount the magneto on any approved test stand
with a variable speed range and approved three-point
test gap rack,
such as Eisemann H 1 9-960. (See figut·e
.
6-16).
b. The magneto should conform to the following
specifications:
( 1 ) With the distributor plate removed from the
magneto, connect the high tension terminal on the
coil with a suitable test lead to one of the test gaps,
and set to a standard 5 mm. opening as shown in figure
6 - 1 7 . Run the magneto through a speed range to a max­
imum speed of 2,000 r.p.m. The breaker assembly
should operate without excessive arcing between the
contact points. Excessive arcing may be an indication
of a faulty condenser or loose connections.
,.----- Note --------,
.
\
.
Oil, dirt, or other foreign matter will also
cause arcing between the points and care
should be exercised to assure that the contact
points are clean.
(2) Replace the distributor plate, connect the
high tension cables from the distributor plate to the
test rack and set the three point test gaps to a 5 mm.
NOTE
ALL
IN
D I MENSIONS
MILLIMETERS .
I�
�
0
0
Figure 6- J 7. Spark Gap Setting.
opening. Run the magneto through the following
speed range as indicated:
MAGNETO MODEL
AM- 1 , AM-2H
AM-2N, AM-4
AM-6
SPEED RANGE R.P.M.
0-2000
0-4000
0-5000
During this test, there should be regular sparking of
the test gaps. Decrease the speed for a low speed
check. Regular sparking on all models should occur
at 1 5 0 r.p.m. or less.
(3) On magnetos equipped with an impulse
starter, a test should be made to assure the proper
operating characteristics of the impulse starter. Up
to 160-260 r.p.m., the pawls on the flange of the i�­
pulse starter should engage the catch pin on the
housing and the impulse starter should operate.
Above this speed, the pawls on the flange should
cease to engage the catch pin and the starter should
then act as a direct drive coupling.
·-
21
Section VII
(
SECTION VII
PARTS CATALOG INTRODUCTION
7-1 . The parts catalog consists of a group assembly
listing of all replacement parts used in .e ach model
magneto. In the column under "NOMENCLATURE",
the various sub-assemblies and associated parts are
indented to indicate their relative relationship. Ex­
ploded view photographs are shown on the page
opposite the listing, in order to associate any part with
another. Reference to these illustrations is made by
means of the figure number and individual index num­
ber.
7-2. The quantity of parts required for each model
is shown in the column under "UNITS PER ASSEM­
BLY".
1 .(or more )-:-Denotes that the quantity specified is
always required for any particular
magneto of that model.
1 AR-Denotes that one part is required but the
particular part number must be selected from
one of several parts depending upon the spe­
cific application.
AR-Denotes that the quantity to be used is variable
to meet a specific condition and in some cases
may not be required.
.------ Note --------1
When ordering replacement parts or complete
magnetos, it is essential that reference be made
to the magneto assembly number.
The designations " 1 , 1AR and AR" in this column
are used as follows:
SEE FIGURE
8-3
SEE FIGURE
8-2
"\
,
�111 � l l\ e
,
,,�·
.
•�
ft}T'
.
0
�= "'
C
!'
\.
.
·,
.
.
lt. ' '
��
....�
.
(.__
\.
.
Figure 8- 1 . Magneto Assembly.
22
SEE FIGURE
8-7
oe
...;�
�v
��� 'CD
� ��
'1'6..
SEE FIGURE
8-6
SEE FIGURE
8-5
SEE FIGURE
8-4
·,
Section VIII
/
,-
FIG.
No.
\
.
SECTION VIII
GROUP ASSEMBLY PARTS CATALOG
(
___,
INDEX
No.
PART
No.
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
1
1-123-954
*1-123-955
1-124-369
1-124-406
1-124-519
*1-124-553
1-126-931
1-127-222
*1-127-380
*1-127-381
1-127-571
1-127-636
*1-127-697
1-124-373
"1-124-410
1-124-41 1
1-127-654
1-127-702
1-124-512
*1-127-327
1-127-690
*1-127-715
1-123-957
1-123-996
1-124-375
1-124-435
*1-124-451
*1-124-466
*1-124-490
1-124-5 1 1
1-124-526
1-124-532
1-124-607
1-124-616
1-124-631
*1-126-990
1-127-542
1-127-653
1-127-680
1-127-706
*1-127-796
1-126-948
*1-127-382
1-121-082
8-1
1
1-123-467
8-1
2
1-121-033
8-1
2
1-122-640
8-1
8-1
8-1
8-1
8-1
3
4
5
6
7
1-16-767
1-19-980
1-121-961
H 13-847
1-121-163
UNITS PER ASSEMBLY
NOMENCLATURE
Magmito (€LW)- Fairmont Rwy. & Wise.
Magneto (ACLW)-Wisconsin
Magneto (CLW)-Le Roi
Magneto (CLW)-Wisconsin
Magneto (CL W)-Novo
Magneto (CL W)-Vaughn
Magneto (CLW)-I ndustrial Eng.
Magneto (ACLW)-Climax
Magneto (CLW)-Invincible
'
Magneto (ACLW)-Invincible
Magneto (R)-Fairmont Rwy.
Magneto (CLW)-Hornet
Magneto (ACLW)-Electric Tamper
Magneto (ACLW)-Le Roi
Magneto (CLW)-Le Roi
Magneto (CLW)-Le Roi
Magneto (CLW)-Le Roi
Magneto (ACLW)-Le Roi
Magneto (CLW)-Novo
Magneto (CLW)-Deep Sea Export
Magneto (CLW)-Hornet
Magneto (ACLW)-Todd
Magneto (CLW)-Fairmont Rwy.
Magneto (CLW)-Kohler
Magneto (CLW)-Fairmont Rwy.
Magneto (ACLW)-Fuller & johnson
Magneto (ACLW)-Palmer Bros.
Magneto (CLW)-Waukesha
Magneto (CL W)-Le Roi
Magneto (CLW)-Novo
Magneto (ACLW)-Le Roi
Magneto (CLW)-Le Roi, Kalamazoo Rwy.
Magneto (CLW)- Continental
Magneto (CLW)-Aircooled
Magneto (CLW)-Aircooled
Magneto (CLW)-Waukesha
Magneto (ACLW)-Le Roi
Magneto (CLW)-Le Roi
Magneto (CLW)-Continental, aircraft
Magneto (CLW)-Continental, aircraft
Magneto (CLW)-Fairmont Rwy.
Magneto (CLW)-Continental
Magneto (ACLW)-J . Deere
Screw-Fillister head, upper
(10-32 x 17.( in.)
Screw-Fillister head, upper
( 10-32 x 1 in.
Screw-Fillister head, lower
(10-32 x 1 % in.
Screw-Fillister head, lower
(10-32 x 1% in.
Washer-Lock
Washer-Plain
Terminal Cable
Washer-Lock
Screw-Fillister head (No. 10-32)
LEGEND
*Magneto supplied with floating disc
ROTATION
CL W-Clockwise
ACL W-Anticlockwise
R-Reversiblc
1,
STARTER MOUNTING AM1 AM2H AM2N AM4
1-123-738
1-123-930
1-123-732
1-123-738
1-126-181
1-123-738
1-123-751
1-127-232
1-123-733
1-123-742
1-123-930
1-123-742
1-123-732
1-123-732
1-123-732
1-123-742
1-126-161
1-123-760
1-123-758
1-123-751
1-123-763
1-123-752
1-123-752
1-126-161
1-123-762
1-123-752
1-126-163
1-123-753
1-123-753
1-123-754
1-123-762
1-123-752
1-126-163
1-123-752
1-123-898
1-123-763
SVF
35mm
45mm
SVF
VF
35mm
HF
H F (Sp.)
45mm
45mm
KOH
HF (Sp .)
35mm
VF
45mm
VF
45mm
45mm
VF
HF
·H F
45mm
VF
KOH
35mm
45mm
45mm
45mm
45mm
VF
VF
VF
HF
HF
HF
45mm
45mm
45mm
HF
HF
35mm
VF
45mm
1
1
1
1
1
1
1
1
1
1
1
1
1
AM6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
4
4
4
3
3
4
2
2
2
4
4
1
3
3
1
1
4
4
2
3
3
2
4
4
2
3
3
MOUNTING:-35mm-35mm base
45mm-45mm base
H F-Horizontal flange
HF (Sp.)-Horizontal flange
tilator)
VF-Vertical flange
SVF-Small vertical flange
KOH-Special Kohler
4
6
3
3
(no ven-
23
·-
-
.
.
•
•
'
)>
�
3
.,.
"'
"'
�
Q
;;
.,
0
..
c:
0:
:::-
0
en·
Section VIII
l
,-
FIG.
No.
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-2
8-3
8-3
INDEX
No .
I
I
I
UNITS PER ASSEMBLY
PART
No.
H23-725
HH-262
H 26--!86
H2-!-2H
H2-t-923
HH-1 1 0
.
.
1
I
2
3
4
5
6
7
8
9
10
!I
!I
12
12
1.3
14
15
16
16
16
16
17
is
19
20
21
22
2
H9-922
H27-136
H26-855
H26-857
H26-856
H2-!-909
H2-!-910
H23-1-!2
H22-615
H 15 - 1 2 3
H26-986
H26-986
H9-407
H9--!07
H 1 7- 1 8 6
H23-682
H2-t-2-!8
H2-!-026
H24-027
H24-028
H24-029
H 26-473
H23-927
H23-923
H23-885
H23-921
H24-315
H23-922
H23-8!6
Distributor Plate AssembhDistributor Plate Assembiy (with H2-!-028 switch)
DistributorPlate Assembl\'
Distributor Plate Assembh·
Distributor Plate Assembl�·-Jump spark distribution
Distributor Plate Assembly
Plate-Dist . , machined
Plate-Dist . , machined (mouldPd ground terminal)
"PTate�Dist . , machined
Plate-Dist . , machined (moulded ground terminal)
Plate-Dist . , machined
Brush Assembh--Center
Brush Assembly-Long
Contact Assembly
Eyelet
Spring
Gasket-Ventilator (jump spark)
Screen-Ventilator (jump spark)
Hood-\'e 1tilator (jump spark)
Washer-Lock (jump spark)
Screw-Round head (jump spark)
Nut
Nut
Washer-Lock
Washer-Lock
Washer-Plain
Spring-Short circuiting
Screw-Ground terminal, square head
Switch Assembly
Switch Assembly
Switch Assembly
Switch Assembly
Washer-Cupped .spring
Bushing
Spring-Switch
Handle
Handle
Screw-Fit. hd. (No. 10-32 1�6 m. head)
Screw-Fit. hd. (No. 10-32 �� i n . h'ead)
I m pulse Starter Assembl�· (Rpfer to following tabulation)
Spring-Spiral
RO-
TATION
H23-731
H23-732
H 2 3 -733
H23-738
H23-H2
H23-751
H23-752
H23-753
H23-754
H23-758
H23-760
H23-762
H23-763
H23-898
H23-930
H26-161
H26-163
H26-181
H27-232
\. ...
I
'
l
\.
8--t
8-4
I
8--l
8- 4
2
3
AM1 AM2H AM2N AM4
NOMENCLATURE
H 2 7--l62
H27-330
H6-912
H23-727
c
c
c
c
A
c
c
c
c
c
c
A
A
c
A
c
c
c
A
Lt:G
ANGLE
(I)
FLANGE
ASSEMBLY
DRIVE
CL'P
15
20
25
25
20
15
20
25
30
25
10
20
25
30
25
IS
2S
IS
2S
20
25
30
30
25
20
25
30
35
30
15
25
30
20
55
20
30
20
30
H23-8-!1
H 23-842
H 23-8-!3
H23-8-!3
H23.-852
H23-771
H23-772
H23-773
H 2 3 - 7 7-!
H23-773
H23-780
H23-782
H23-783
H23-7H
H23-853
H23-771
H23-773
H23-8-!l
H 2 7-233
H23-812
H23-8!2
H23-812
H 23-9-l5
H23-817
H23-812
H23-812
H26-1-!9
H23-8!2
H23-812
H23-817
H23-81 i
H23-81 i
H 23-899
H23-893
H 26-200
H26- 200
H ::.6-200
H23-817
RacL•-Outer (H 3-S07 n,·arin�-SL'C Fig' �-5)
Bearing-O i l i t e , bronzL'
1
1
1
I
2
I
I
I
2AR
2AR
2A R
I
-!AR
-!AR
1
I
I
I
1
I
I
2
I
I
I
-!
I
I
I
2AR
2AR
2AR
HR
1
-!AR
I
IAR
IAR
IAR
JAR
IAR
I
I
I
1 :\ R
. I
I
I
I
I
I
lAR
IAR
1.'\R
I
I
I
I
I
I
1
1AR
IAR
IAR
IAR
I
IAR
IAR
I
1AR
1
I
I
I
6
I
1
I
2:\R
2AR
2A R
-tAR
HR
I
JAR
I
IAR
I
I
I
IAR
IAR
I
I
1:\R
I
I
JAR
1AR
1
1 :\ R
I
1
1 .
1 :\ R
I
'
(3)
LAC
ANGLE
End Plate Assembh·
End Plate-Machin<!d
End Platc-Machinl·d
IAR
IAR
AM6
J AR
1AR
1AR
IAR
IAR
JAR
IAR
JAR
1:\R
JAR
JAR
IAR
JAR
J AR
I AR
IAR
IAR
I
I
I
1
I
I
I
1
I
I
JAR
1: \ R
1: \ R
1 :\ R
JAR
1 :\ R
JAR
I
1
I
I
1
1
I
I
*A denotes anticlockwise and C denotes clockwise rotation .
25
.,
::::-
1.1'1
::r
Q
0
...
::'0
0
...
c:
...
�
c(j"
r '
J
�:
Section VIII
(
i
I
\
{\
..__
\,
FIG.
No.
INDEX
No.
8--!
8--!
8-4
8--!
8-4
8-4
8--!
8-4
8--!
8-4
8--!
8--!
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
g 4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
8-4
4
4
4
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
28
29
29
30
31
32
33
34
8--!
8-4
8-4
8-4
35
36
37
38
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-S
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
1
1
1
1
2
3
4
4
5
5
5
5
5
5
6
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
8-5
7
8
9
10
10
10
10
10
10
12
8-5
8·5
IS
15
8-5
. 16
1
1
1
UNITS PER ASSEMBLY
PART
No.
H23-655
HH-105
H2-l-295
H27-171
H27-130
H27-128
H26-85-l
HU-080
H27-100
H2-l-085
H22-871
H22-871
HZ-1-986
H26-923
H24-924
Hl7-183
H22-615
H23-697
H24-968
H24-227
H22-936
H24-104
H 22-944
H 1 8-058
H22-615
H22-986
H23-510
H23-SI6
H24-881
H23-S07
H24-883
H22-985
H23-S09
H24-229
H26-933
H20-547
H20-48S
H20-476
H22-654
H6-767
H 2 1 -032
H23-711
H23-714
H27-114
H27-125
H27-242
H27-329
H 2 7-655
H27-728
H27-729
H23-696
H14-199
H23-683
H24-113
H23-658
H23-690
H23-710
H26-958
H27-569
H 2 7-635
H23-724
H3-507
H6-91l
H6-910
H6-980
H6-982
H6-981
I-19-692
H 1 4-784
H l4-785
I-127-686
H9-179
H23-833
HH-906
I-123-83-!
H 23-61J5
l l 26-032
H2.J-IJO-l
Hl-1-228
AM1 AM2H AM2N AM4
NOMENCLATURE
Rotor-Distributor assy . , moulded (Carbon brush distribution)
Rotor..:...Distributor
.
assy . , moulded
Rotor-Distributor assy . , moulded (jump spark distribution)
Rotor-Distributor assy., removahle electrode (jump skarp)
Rotor-Distributor ass y . , removable electrode
Ele�trode-Removable
H27- 130 Or H 2 7 - 1 7 1 onlv
· }
Spnng-Clamp
Rotor-Distributor assy. (A:\!-2N models only}
Bushing-Distributor rotor {A:\1-2:-.1 models only)
·Screw-Set (AM-2N models only)
Washer-Shim (.0156 in.)
Washer-Shim (.0156 in.)
Washer-Shim ( .0082 in.)
Ring-Snap
Condenser Assemblv
Screw-Round head
Washer-Lock
Spacer-Condenser screw
Terminal-Lead
Washer-Lock
Nut-Round, slotted head
Breaker Assembly
Nut-No. 6-32
Washer-Plain
Washer-Lock
Washer-Insulation
Spring-Breaker
Lever Assembly-Breaker, tungsten point
Lever Assembly-Breaker, platinum point
Plate Assembly-Tungsten contact
Plate Assembly-Platinum contact
Washer-Insulation
Washer-Insulation
Lead Assembly-Breaker
Screw-Special
Washer-Plain .016 in.)
Washer-Plain .006 i n . )
Spring-Lock
Washer-Plain
Washer-Lock
Screw-Fillistcr head
Rivet-Split
Wick-Oil
Rotor Assembly
Rotor-S .A.E. aircraft shaft (Aircraft Only-Flange Mount' d)
Rotor-Extended Shaft (Flange Mounted)
Rotor-Standard shaft
'
Rotor-Standard shaft (AM-2N model only)
Rotor-Ext. shaft (For AM-2N only}
Rotor-Standard shaft
Rotor-Extended shaft
Nut-Pinion, gear
Washer-Lock
Gear-Pinion
Gear-Pinion
Cam-1 lobe (Short)
Cam-2 lobe (with impulse starter)
Cam-1 lobe
Cam-1 lobe (Short)
Cam-! lobe (Reversible)
Cam-2 lope (without impulse starter)
Key-Woodruff
Bearing-Ball (15mm)
Ball Ca e Assembly
Race- nncr
Washer-Shim ( . ! mm)
Washer-Shim (.3mm)
w hoc--5p�i•l •him (.0080 , , . )
Washer-Special shim (.0226 i n . )
Washer-Special shim ( . 0063 i n . )
Washer-Special shim (.0100 i n . )
Washer-Special s h i m (.0020 in.)
K<'y-Wood ruff
Washer-Thrust (For <·xtendcd shafts)
Washer-Thrust (I-127-730 rotor only)
Bushi ng-Driving Gl•ar (For extended shafts)
Nut-Drive, cast(\llatcd
Nut-Drive (I-127-730 rotor onlv)
Washl·r-Shim (1-1 26-032 nut o1ily)
Pin-Cotter
.
1
1
1
1AR
1AR
}
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..
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)
1
AM6
1
lAR
1AR
1
1
1
1
AR
AR
1
1
2
2
1
1
1
1
1
1
1
1
I
1
IAR
IAR
1AR
1AR
2
1
1
1
AR
AR
I
1
1
1
1AR
·1AR
1
1
AR
AR
1
1
2
2
1
1
1
1
1
1
1
I
1
1
IAR
!AR
IAR
IAR
2
1
1
1
AR
AR
1
1
1
1
1
1
1
1
1
1
1AR
1
I
1.
1
2
2
1
1
1
1
1
1
1
1
1
1
1AR
1AR
IAR
IAR
2
1
1
1
AR
AR
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
IAR
IAR
IAR
IAR
2
1
1
1
AR
AR
1
1
1
1
1
AR
AR
1
1
2
2
1
1
1
1
I
1
1
I
1
1
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IAR
IAR
IAR
2
I
1
1
AR
AR
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AR
AR
1
1
1
1AR
I
1
1
2
2
2
2
2
1
2
2
2
2
2
1
1
2
2
2
2
2
1
1
2
2
2
2
2
1
1
2
2
2
2
2
AR
AR
AR
AR
AR
1
1
1
1
1
I
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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27
.....
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....
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. .
Section VIII
(
l
FIG.
No.
INDEX
No.
8-6
8-6
I
\
8-6
8-6
8-6
8-6
2
3
4
5
8-6
8-6
8-6
8-6
8-6
6
7
8
9
10
8-6
8-6
8-6
8 6
8-6
8-6
8-6
11
12
13
14
14
IS
16
-
L
\.
I
2
8-7
8-7
8-7
8-7
8-7
8-7
8-7
5
6
7
8-7
8-7
8-i
8-7
8-7
R-7
8-7
8-7
8-7
8-7
8-7
R-7
8-7
3-7
8-7
.n
8-7
8-7
8-i
/l-7
8-i
8-7
8-7
8
9
10
11
12
13
14
15
16
I7
18
19
20
21
22
2.\
24
25
26
27
28
29
30
3
4
UNITS PER ASSEMBLY
PART
No.
H2i-140
H2i- li-!
H2i-i31
H2i-i32
H 2 i - i34
H 2 i-733
H2i-i35
HH-300
H27-107
H26-845
H22-5i7
H6-912
f-123-8 1 1
f-123-824
f-123-823
f-123-822
H23-825
H22-615
H23-810
H23-634
H2-1-120
f-126-789
H20-686
f-126-788
H 2 6-783
H20-68-+
H20-685
H 2 0-5.58
H 2 6-825
f-127-719
f-126-835
H23-691
*H3-568
* H 2 1 -568
*H2 1-656
*H2 1-657
*H3-569
* H I 7-775
*H21-241
*H2 1-242
*H2 1-243
H27-108
f-127-072
H27-073
H 14-595
f-124-200
f-12-1-201
H24-202
HU-212
HH-2 1 5
H2-l-218
H2-1-20-1
H2-1-205
H 1 7-374
H24-098
f-124-099
H2-1- 1 1 9
f-123-818
f-126-925
H24- 1 2 1
H24-140
H24-141
H24-I.J6
H2.J-147
H24-IH
H2P-738
H 2 1 -740
H24-970
H24-971
HH-973
f-124-975
f-124-977
f-124-976
H9-318
NOMENCLATURE
Housing· Assembl y
Housing-;\lachined, horizontal flange
Housing-�lachincd, \'ertical flange
Housing-;\lachined, 35mm base mounting
Housing-;\lachined, 45mm base mounting
Housing-Machined, 35mm base mounting (special Kohler)
Housing-;\[ach ined, small vertical Aange
Housi ng-i\·lachined, horizontal Aange (without ventilator)
·Plate�Adapter. For changing 35mm to 45mm base
Plate-Name, blank (data as required)
Screw-Drive
Pin-Dowel
Race-OutPr (H 3-507 Bearing-Sec Fig. 8-5)
Seal Assembly-Dust (base mounting only)
Washer-Reta ining
Washer-Felt
Retainer-Dust seal
Screw-Fillister head (No. 6-32)
Washer-Lock
Pin-Catch (with impulse starter)
Seal-Dust, felt
Seal-Oil (Spring T y e)
Gasket-Ventilator. or ha se screen H26-78S
Gasket-Ventilator. For H20-684 screen
Screen-Ventilator. for 4Smm base
Cover-Plate. for 45mm base ventilator hole
Screen-Ventilator. For housing. (Flange Mounting)
Cover-Plate
Screw-Round head
Coil-Complete
Coil-Complete (with H 23-653 c1:n only)
Clamp-Coil
Gasket-Distributor-Plate
Washer-! nsulating (.008 i n . )
Washer-Insulating ( . 0 1 0 in.)
Washer-Insulating ( . 0 1 2 i n . )
Washer-Insulating (.01-1 i n . )
Strip-Insulating (.010 i n . )
Strip-Insulating ( . 0 1 6 i n . )
Strip-[ nsulating ( . 008 i n . )
Strip-[nsulating ( . 0 1 2 i n . )
Strip-Insulating (.014 i n . )
Magneto Hub Assembly-Drive
Screw-Set, cup point
Hub-Drive
Magneto Flange-Drive
Coupling Assembly-Complete
Coupli ng-Adj usta ble
Hub-Drive. For %' inch shaft
Hub-Drive. For :Ys inch shaft
Hub-Drive. For % inch shaft
Hub-Drive. For .Y2 inch shaft
Screw-Set
Disc-Rubber
Disc-Floating, canvas bakdite
Disc-Floating, metal
Disc-Floating, canvas bakelite
Disc-Floating, canvas bakclite
Disc-Floating, canvas bakelite
Disc-Floating, canvas bakt.'lite
Flange-Engine drive (used without impulse starter)
Coupling Assembly-Engine drive, adjustable ( %' i n . hub)
Coupling Assembly-Engine drive, adj u,;table ( ?/g in. hub)
Washer-Lock
Nut-Lock
Flangc-Drjvin
Hub-Driving %' in . horl')
Hub-Driving (?/g in . bore)
Coupling Asst•mhly-F.nginc drivl', Vernier
Flange-Hub
Hub-Driving
Screw-Vernier
Washt•r -Plain
Nut
Pin-Cotter
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f;
AM1 AM2H AM2N A M 4
I
I
I
I
I
I
I
I
I
2
4
.)
I
I
I
I
I
4
4
I
I
I
I
I
I
I
I
I
I
IAR
IAR
2
I
AR
AR
AR
AR
AR
AR
AR
AR
AR
0
I
I
1
I
1
I
I
2
4
3
I
I
I
I
I
4
-+
I
I
I
I
I
I
I
I
I
I
I
2
I
AR
AR
AR
AR
AR
AR
AR
AR
AR
2
4
I
1
I
I
I
4
-+
I
I
I
I
I
I
I
I
I
I
I
2
I
AR
AR
AR
AR
AR
AR
. AR
AR
AR
IAR
1
1
IAR
I
I
I
I
I
I
AM6
I
I
I
I
2
4
3
I
I
I
I
I
4
4
I
1
I
I
I
I
I
I
I
I
1
2
4
"
I
I
I
I
I
4
4
I
I
I
I
I
I
I
I
I
I
I
2
I
AR
AR
AR
AR
AR
AR
AR
AR
AR
2
I
AR
AR
AR
AR
AR
AR
AR
AR
AR
IAR
I
1
IAR
IAR
IAR
IAR
JAR
IAR
I
I
I
IAR
I
I
I
2
I
I
IAR
IAR
I
I
I
I
I AI{
I
I
I
2
I
I
I
I
1AR
I AR
IAR
IAR
I
I
I
IAR
lAR
IAR
I
I
I
2
I
I
IAR
IAR
I
I
I
I
IAR
I
I
I
2
I
1
*For use wil h old style housing.
29
.
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.
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