TM 5-3820-233-35/2
brushes. Disassemble, remove sand paper, and clean
(2) To test field coil windings for open
armature shaft brush holder plate assembly.
circuits, connect multimeter probes to the ends of field
(7) Install thrust washer on armature shaft
coil, if mulltimeter does not read field coil is open and
and install performed packing on end bell. Install end
should be replace.
bell assembly with assembled brush holder assembly on
(3) To test field coil windings for grounds,
commutator and install brushes. Install flat washer on
disconnect field coil winding ground connection.
armature shaft and install , armature and end bell as a
Connect meter probes to field frame and field
unit into frame.
connector, if multimeter reads, field coil is grounded,
and must be repaired or replaced.
j.
Adjusting Drive Clutch Pinion Clearance
h.
Assembly of End Bell and Brush Holder
(1) Remove plug.
Plate .
(2) With starter pinion in engaged
(1) If
wick
was
removed
during
position, press clutch inward lever to take up slack.
disassembly, saturate a new wick and p)lug with oil and
(3) Adjust hex self-locking nut until
install in end bell. Wick must not be in fill hole.
clearance between outer face of pinion and inner face of
(2) Apply sealer to expansion l)lug hole
housing overhaul is 23/64 inch 1/32 inch.
and install plug. Fill reservoir with oil and install pipe
plug.
k.
Installation. Refer to operators Manual.
(3) If bushing was removed, press a new
bushing in end bell and install expansion plug.
(4) Assemble brush holder plate and end
31. Generator - Battery Charging
bell in the reverse order of disassembly but do not install
brushes.
a.
General. The generator is a 24-volt 40
.
ampere type mounted on the front of the engine. It is a
i.
Starter Reassembly (fig. 10-3)
fungus and corrosion resistant and is arranged for " "
B
type circuit with the field grounded inside the generator.
(1) If wicks were removed during
b.
Removal. Refer to Operator' Manual
s
disassembly, install wicks and plugs following same
c.
Bench Testing. To check the generator for
instructions specified for end bell (1) and (2) above).
electrical output , connect a ammeter in series with a
(2) If bushings were removed, press new
battery to the generator output terminal. Also connect a
bushings into housing.
voltmeter from the generator output terminal to ground
(3) Assemble starter in reverse order of
and a load rheostat across the battery . Connect a
disassembly with the following exceptions and additions.
jumper lead to the generator field terminal as shown in
(4) If field windings were removed, coat
threads of pole shoes screws with a suitable thread
adjust the lead rheostat to obtain a reading of 18
sealer before installation. Varnish inside of frame and
winding assembly leave 0.38 inch from each end of
the generator will not meet these conditions it should be
frame free of varnish.
disassembled for further testing.
(5) Partially install lever housing, lever,
d.
and solenoid plunger before installing drive clutch. With
e.
Cleaning.
frame in vertical position and lever housing upward,
(1) Clean the armature and field winding of any dirt or
install nonmetallic washer and install drive clutch. Tilt
magnetized particles. To remove grease and oil, apply
clutch to engage lugs on shift lever. Seat housing
a light coat of safety type petroleum solvent such as
making sure bellows is not crimped.
MIL-T-6003, with a brush.
Wipe clean, then use
(6) If new brushes are being installed,
compressed air to remove any remaining dirt film. Do
cover commutator with No. 00 sandpaper temporarily
install armature, brushes, and end bell and turn in
3-3
