Table 2-1. Mechanical Troubleshooting
TEST OR INSPECTION
Test air conditioning system, (See paragraph 10-20)
If leaks are found, tighten loose fittings and replace any damaged
Start engine. Check air conditioner belt for slipping.
If air conditioner belt is still slipping, repair compressor. (See paragraph
Start engine. Inspect compressor clutch for slipping. If compressor clutch is
slipping, shut off engine and check gap between compressor clutch plate and
compressor pulley. Gap should be 0.022-0.057 in. (0,560-1 .450 mm).
If gap is not within specifications, disassemble compressor and check for
mispositioned shaft or key. (See paragraph 10-24)
Check clutch coil housing for improper installation or damage. (See paragraph
Reposition or replace clutch coil housing if necessary.
Remove air conditioner inlet grille. Inspect condenser coils and air conditioner inlet
grille for air blockage due to buildup of foreign material.
Clear air blockage.
DO NOT oporate air conditioner for extended periods with condenser
cover assembly removed. Failure to follow this caution may result In
damage to air conditioning system due to high head pressure.
Remove condenser cover assembly. (See TM 9-2320-289-20) Operate air
conditioning system. Feel condenser coil bends. Bends at equal elevation should
be about the same temperature.
If bends have significantly different temperatures, cooler bend has a
restriction, Replace condenser if there are any restrictions. (See paragraph