ARMY TM 9-6115-639-13
AIR FORCE TO 35C2-3-386-51
MARINE CORPS TM 10155A-13/1
4-48. COOLING FAN AND TEMPERATURE SWITCH MAINTENANCE - cont.
Tag and disconnect two electrical wires (18, 19, Figure 4-40) from low temperature switch S21 (17) (85
F). Remove temperature switch from main access cover by removing two screws (14), lockwashers (15),
and washers (16).
Disconnect fan power cord (6) from generator set wiring harness.
Remove low temperature fan (2) from main access cover by removing two screws (8), lockwashers (9) and
Remove finger guard (1) only if fan (2) is to be replaced. Finger guard must be
retained for use on new fan.
10. Remove finger guard (1) from fan (2) by removing two screws (3), washers (4), and nuts (5).
11. Disconnect electrical wire (7) from fan (2) by removing screw (11), lockwasher (12), and washer (13).
Inspect finger guards and cooling fans for obvious damage. Manually operate fan blades to ensure smooth
operation, free from binding.
Inspect temperature switches for obvious damage. Check that electrical terminals are securely attached
and free of corrosion.
Inspect electrical wiring for cuts, crimps, bare wire, or other damage. Ensure terminal lugs are securely
attached. Inspect fan power cords for damage. Check that electrical connectors are securely attached.
Remove and replace any component that is damaged to the extent that it will effect the safe operation of
the generator set.