TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-13
Alternator Overcharging
This is symptom tree T014.
Cause
Correction
Battery cables or connections are loose,
Check the battery cables and connections.
.......
broken, or corroded (excessive resistance)
Refer to Procedure 013-009.
OK
B
Load test the battery. If the battery charge is
low, charge the battery. If battery fails the
attery condition poor
.......
second load test, replace the battery. Refer to
Procedure 013-007.
OK
A
Check the alternator belt tension. Adjust as
necessary. Refer to the Operation and Mainte-
lternator belt is loose
.......
nance Manual, B Series Engines, Bulletin No.
3810205.
OK
A
Tighten the pulley. Refer to the OEM service
lternator pulley is loose on the shaft
.......
manual.
OK
A
Replace the alternator. Refer to Procedure
lternator is malfunctioning
.......
013-001.
L-597
