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 724 of 1258
1 4 - 2 7 . AIR-CONDITIONING COMPRESSOR REPA
I R
This task covers:
a.
Preliminary Inspection and Cleaning
c.
Inspection
b.
Disassembly
d.
Assembly
INITIAL SETUP:
Applicable Models
_______________
M997, M997A1, M997A2
To o l s
____
General mechanic's tool kit:
automotive (Appendix G, Item 1)
Test Equipment
_____________
Multimeter (Appendix G, Item 120)
Special To o l s
__________
Compressor tool kit (Appendix G, Item 102)
M a t e r i a l s / P a rt s
_____________
Two O-rings (Appendix E, Item 105)
(R-12 only)
Seal kit (Appendix E, Item 176)
Gasket kit (Appendix E, Item 39)
Clutch accessory kit (Appendix E, Item 6)
M a t e r i a l s / P a rts (Cont’d)
____________________
Lubricating oil (Appendix B, Item 35) (R-12 only)
Lubricating oil (Appendix B, Item 35.1) (FR-12 only)
O-ring (Appendix E, Item 105) (FR-12 only)
O-ring (Appendix E, Item 104.1) (FR-12 only)
Manual Refere n c e s
________________
TM 9-2320-280-24P
Equipment Condition
_________________
Air-conditioning compressor removed (para. 14-24).
General Safety Instructions
______________________
• Compressed air for cleaning purposes will not
exceed 30 psi (207 kPa).
• Compressor cylinder block may be pressurized.
Maintenance Level
_______________
Direct support
1.
Inspect front of compressor shaft (6) for oil leakage. If oil leakage is evident, replace compressor
shaft seal.
________
WARNING
________
Compressed air for cleaning purposes will not exceed 30 psi
(207 kPa). Use only with effective chip guarding and personal
protective equipment (goggles/shield, gloves, etc.).
2.
Clean compressor assembly with refrigerant oil and dry with compressed air.
________
WARNING
________
Compressor cylinder block may be pressurized. Loosen oil filler
plug slowly. If sound of escaping gas is heard, do not continue
loosening plug until all pressure is released.
3.
Loosen oil fill plug (3) to relieve any pressure buildup in compressor cylinder block (1).
4.
Rotate compressor shaft (6) with ratchet and socket on compressor shaft nut (5). If severe rough
spots or catches are felt while rotating shaft (6), replace compressor assembly.
5.
Remove oil fill plug (3) and O-ring (4) from compressor cylinder block (1) and drain oil from cylinder
block (1) into measuring container. Record amount of oil in measuring container.
6.
Install O-ring (4) and fill plug (3) in cylinder block (1) and tighten fill plug (3) finger tight.
7.
Inspect oil for chips, metal shavings, and metal particles. Replace compressor assembly if chips,
metal shavings, or metal particles are present in oil.
CAUTION
_______
Do not clamp compressor body in vise. Clamp or support only at mounting
ears, with blocks of wood, to prevent damage to compressor body.
b. Disassembly
a. Preliminary Inspection and Cleaning
TM 9-2320-280-34
1 4 - 1 2 4
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