TM 5-3825-213-35
CHAPTER 8
PLOW AND CARRIER ENGINE REPAIR INSTRUCTIONS
Section I. GENERATOR ASSEMBLY (CARRIER ENGINE)
Replace defective seals.
180. General
(3)
Inspect brushes for wear. If brushes are at
The generator assembly is rated for 100 amperes
or below 5/16 inch minimum length, replace
output at 28 volts. Full output can be obtained at 2,000
brushes.
generator rpm. The maximum safe operating speed,
(4)
Inspect brush levers and lever springs for
determined by bearing limits, is 8,000 rpm. When battery
damage.
Replace defective levers or
voltage drops below normal, the main relay coil in the
springs.
regulator, which is connected in parallel across the
(5)
Inspect sliprings for excessive wear or
batteries, causes the main relay contacts to close. The
distortion. The minimum allowable dia-
rotating field coil circuit is thereby energized, causing
meter of sliprings is 1.812 inches and
current to flow through the slipring brushes and sliprings
maximum allowable eccentricity diameter is
to the field coils. The rotating field induces a voltage in
0.001 inch. Replace defective sliprings.
the stator coils of the generator causing current to flow
(6)
Replace or repair all other worn, damaged,
through the output leads and through the receptacle to the
or defective parts.
183. Generator Assembly Reassembly and
181. Generator Assembly Removal and Disassembly
Installation
a. Removal. Remove the generator assembly (TM
a. Reassembly. Reassemble the generator assem-
5-3825-213-20).
bly in the reverse of numerical sequence illustrated on
b. Disassembly. Disassemble the generator assem-
bly in order of numerical sequence as illustrated on figure
b. Installation. Install the generator assembly (TM 5-
3825-213-20).
182. Generator Assembly Cleaning, Inspection, and
184. Testing
Repair
Place the alternating current
a. Test Set-up.
a. Cleaning.
generator on a test stand which incorporates a seven
(1) Clean stator, brush holder assembly, rotor,
horsepower driving motor and connect as shown on figure
and rotor sliprings with a cloth saturated with an approved
50. The 0 to 20 ampere ammeter measures field current
cleaning solvent. Wipe dry or dry with compressed air.
of the generator, the 0 to 150 ampere ammeter measures
(2) Clean all other parts with an approved
load current, and the 0 to 50 voltmeter measures engine
cleaning solvent and dry thoroughly.
generator voltage regulator output voltage. The 1 ampere
b. Inspection and Repair.
load relay switch must be closed during all tests. The
(1) Inspect fan fins for distortion or other
closing of the switch closes the load relay in the engine
damage.
generator voltage regulator and connects the
(2) Inspect bearings for defective seals.
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