TM 5-6115-400-35
CHAPTER 3
ENGINE REPAIR INSTRUCTIONS
Section I. ENGINE ACCESSORIES
can be obtained by varying the
30. General
resistance unit.
This section contains those items which are considered
accessories to the engine. They consist of the starter,
(b) Rated current draw and no-load
battery charging generator, generator regulator, fuel
speed indicates normal condition of
injection pump, mechanical governor, water pump, fan
the cranking motor.
hub, turbocharger, and the Winterization heaters.
31. Electric Starting Motor
a. General.
This is a heavy-duty, 24-volt,
submersion proof, fungus and corrosion resistant,
solenoid-operated, enclosed shift-lever type engine
starter with eight brushes retained in four brush holders.
The drive clutch is a heavy-duty overrunning type and
the pinion clearance is adjustable.
b. Removal. Refer to TM 5-6115-400-12.
c. Bench Testing.
Note. Never operate the cranking
motor more than 30 seconds at a
time without pausing to allow it to
cool at least two minutes.
(1) The armature should be checked for
freedom of operation by turning the drive.
Tight, dirty, or worn bearings, bent
armature' shaft, or loose pole shoe screw
will cause the armature to drag and it will
not turn freely.
(2) No-Load Test (fig. 6).
(a)
Connect the cranking motor in
series with a fully charged battery to
provide 24 volts, an ammeter
capable of reading several hundred
amperes, and a variable resistance.
Also connect a voltmeter as
illustrated, from the motor terminal
Figure 6. No load test
to the motor frame.
An r.p.m.
indicator is necessary to measure
armature speed. Proper voltage
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