TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 157 of 1563
TM 9-2815-220-24
GENERATOR ABNORMAL OPERATION (650 AMPERE)
0021 00
THIS WORK PACKAGE COVERS:
Troubleshooting Table and Diagnostic Tests
INITIAL SETUP:
Tools:
General mechanic’s tool kit (item 121, WP 0176)
Personnel Required
Track Vehicle Repairer (2) 63H10
Equipment Conditions:
Engine installed in vehicle or ground hop.
MALFUNCTION 1:
Not charging (indicator reads in “yellow” same as battery reading with engine stopped and
master switch “ON”.
PROBABLE CAUSE
CORRECTIVE ACTION
(1) Check battery condition.
a. Battery cables or terminals loose, corroded,
broken or disconnected (connector nuts not
tightened).
(2) Inspect and repair cables and terminals
(refer to pertinent vehicle technical manual).
(1) Check circuits and voltage regulator (refer
to pertinent vehicle technical manual).
b. Defective electrical circuits or voltage
regulator.
(2) Repair and replace as necessary (refer to
pertinent vehicle or generator technical
manual).
(1) Check circuits and generator (refer to
pertinent vehicle or generator technical
manual).
(2) Repair and replace as necessary (refer to
pertinent vehicle technical manual).
(3) Replace generator (WP 0051, Generator
Replacement - 650 Ampere).
c. Generator failed.
(4) Assure that generator oil hoses are free of
obstruction.
d. Generator drive gear assembly failed.
(1) Perform Generator Drive Gear Assembly
Torque Check as follows:
PROCEDURE
OBSERVATION
ANALYSIS
Remove 1/8-inch pipe
plug located in center of
end plate and install 200
psi gauge.
Start and warm up engine
at idle speed (675-725
rpm) to operating
temperature (140
°
F).
Oil pressure 100
±
10 psi.
Generator oil pump operation is
normal, the generator is rotating
and the drive coupling is
functioning.
WP 0021 00-1
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