GENERATOR ABNORMAL OPERATION (650 AMPERE)
Not charging (indicator reads in “yellow” same as battery reading with engine stopped and
master switch “ON”.
warm up engine at idle
speed (675-725 rpm) to
Oil pressure same as normal
engine gallery pressure (15-25
Generator oil pump failed, and/or
generator not rotating, and/or
drive coupling failed.
If slippage occurs below 167 foot
pounds, drive gear assembly is
Check slip torque of drive
gear assembly (WP 0039,
NOTE: Generator must
be removed (WP 0051).
Note if there is slippage of the
drive gear while increasing
torque to 167 foot pounds.
If no slippage occurs below
167 foot pounds, slip torque is
acceptable, but gear assembly
may have other damage (low
Proceed to next
If rotation is more that 8
less than 17
, drive gear
assembly is satisfactory.
deflection rate (WP 0039)
Note deflection in degrees
from zero torque to 167 foot
If rotation is greater than 17
less than 8
, the drive gear
assembly is defective.
d. (Continued) Failed generator drive gear
(1) Replace drive gear assembly (WP 0156,
Generator Replacement - 650 Ampere).
Undercharging (maximum indicator reading in “yellow” during vehicle operation.
a. Loose, corroded or grounded battery
terminals or cables.
(1) Inspect, clean, tighten, repair or replace as
necessary (refer to pertinent vehicle
(1) Check individual battery cells (refer to
pertinent vehicle technical manual).
b. Defective batteries.
(2) Replace batteries (refer to pertinent vehicle
WP 0021 00-2