TM 5-3820-233-35/1
engage lugs on shift lever. Seat housing
(2) To test field coil windings for open
making sure bellows is not crimped.
circuits, connect multimeter probes to the ends
of field coil, if multimeter does not read
(6) If new brushes are being installed,
field coil is open and should be replaced.
cover commutator with No. 00 sandpaper tem-
porarily install armature, brushes, and end
(3) To test field coil windings for
bell and turn in brushes. Disassemble, re-
grounds, disconnect field coil winding ground
move sandpaper, a n d c l e a n a r m a t u r e a n d
connection. Connect meter probes to field
brush holder plate assembly.
frame and field connector, if multimeter reads,
field coil is grounded, and must be repaired
(7) Install thrust washer on armature
or replaced.
shaft and install preformed packing on end
h. Assembly of End Bell and Brush Hold-
bell. Install end bell assembly with assem-
er Plate
bled brush holder assembly on commutator
and install brushes. Install flat washer on ar-
(1) If wick was removed during disas-
mature shaft and install armature and end bell
sembly, saturate a new wick and plug with
as a unit into frame.
oil and install in end bell. Wick must not
j. Adjusting Drive Clutch Pinion Clearance
be in fill hole.
(2) Apply sealer to expansion plug hole
(1) Remove plug.
and install plug. Fill reservoir with oil and in-
(2) With starter pinion in engaged po-
stall pipe plug.
sition, press clutch inward lever to take up
(3) If bushing was removed, press a
slack.
new bushing in end bell and install expan-
(3) Adjust hex self-locking nut until
sion plug.
clearance between outer face of pinion and
(4) Assemble brush holder plate and
inner face of housing overhaul is 23/64 inch
end bell. in the reverse order of disassembly
1/32 inch.
but do not install brushes.
k. Installations. Refer to Operator's Manual.
i. Starter Assembly
(1) If wicks were removed during disas-
30. Generator-Battery Charging
sembly, install wicks and plugs following
a. General. The generator is a 24-volt 40
same instructions specified for end bell ((1)
ampere type mounted on the front of the en-
and (2) above.)
gine. It is fungus and corrosion resistant and
(2) If bushings were removed, press
is arranged for "B" type circuit with the
new bushings into housings.
field grounded inside the generator.
(3) Assemble starter in reverse order of
b. Removal. Refer to Operator's Manual.
disassembly with the following exceptions and
c. Bench Testing. To check the generator
additions.
for electrical output, Connect an ammeter in
(4) If field windings were removed, coat
series with a battery to the generator output
threads of pole shoes screws with a suitable
terminal. Also connect a voltmeter from the
thread sealer before installation. Varnish in-
generator output terminal to ground, and a
side of frame and winding assembly. Leave
load rheostat across the battery. Connect a
0.38 inch from each end of frame free of
jumper lead to the generator field terminal as
varnish.
shown in figure 8-1. Operate the generator
(5) Partially install lever housing, lever,
at 1775 rpm, and adjust the lead rheostat to
and solenoid plunger before installing drive
obtain a reading of 18 amperes on ammeter,
clutch. With frame in vertical position and
lever housing upward, install nonmetallic
will not meet these conditions, it should be
washer and install drive clutch. Tilt clutch to
disassembled for further testing.
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