MARINE CORPS TM 6115-12/7
4-10. GENERAL. (cont)
Organizational Troubleshooting - Continued
TEST OR INSPECTION
GENERATOR SET REACHES READY TO LOAD BUT SHUTS DOWN WITH GENERATOR OVERTEMP
To prevent injury, ensure that
Place MASTER SWITCH in OFF position.
Disconnect connector P1
Check resistance across J1-D and J1-F.
If resistance is more than 10k ohms or less than 100 ohms,
refer generator set to next higher level of maintenance.
If resistance is correct,
check for shorts between GECM
interconnect points J1-D, J1-F, P1-B, P1-C and ground.
Remove or repair shorts.
If no shorts found, go to Step 2.
Disconnect connector P4 from EECM. Restart unit with no load.
If generator set shuts down, replace EECM (paragraph 4-64).
If unit does not shut down,
place MASTER SWITCH in OFF
Disconnect battery and check for continuity
between P4-B and P4-E.
If good, refer generator set to
next higher level of maintenance for testing of generator.
If generator tests good, replace GECM (paragraph 4-30).
GENERATOR SET REACHES READY TO LOAD BUT SHUTS DOWN WITH UNDERVOLTAGE
Ensure that VOLTAGE ADJUST knob is set at mid-range.
VOLTAGE meter for correct range (20-35 Vdc).
If voltage is correct, go to Step 2.
If voltage is below 20 Vdc,
check generator output cables
P107AOO (G1(+) to S4-A1) and P108AOO (G1(-) to R2-B) for
If no shorts, replace GECM (paragraph 4-30). If
problem still exists,
refer generator set to next higher
level of maintenance for testing of generator.