TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 53 of 1258
TM 9-2320-280-34
Table 2-3. Air Conditioning Troubleshooting (Cont ’d)
MALFUNCTION
TEST OR INSPECTION
5.
UNUSUAL NOISE WITH CLUTCH DISENGAGED
a
Check Clutch Air Gap (space between pulley and front clutch plate) (para. 1427) with feeler gauge. Gap must be
within range of 0.016 - 0.031 in. (0.406 - 0.787 mm). If air gap cannot be adjusted to specifications, add or remove
shims (malfunction 3b, steps 1 and 2).
b.
Check for defective clutch pulley or front plate. Replace as necessary (para. 14-27).
END OF TESTING!
6.
INCORRECT OIL LEVEL OR LEAK
After a system component has been replaced or there is reason to suspect an incorrect oil level or leak, use the
following procedure to check the oil level:
NOTE
Delete step 1 of this procedure if the compressor has been removed from vehicle.
Step 1.
Run compressor for ten minutes at engine idle (650 rpm).
Step 2.
Check compressor oil level (para. 14-17).
END OF TESTING!
2-26
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