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 708 of 1258
TM 9-2320-280-34
1 4 - 1 0 8
Change 1
1 4 - 2 0 . AIR-CONDITIONING EVA P O R ATOR MAINTENANCE
This task covers:
a.
Removal
c.
Assembly
b.
Disassembly
d.
Installation
INITIAL SETUP:
Applicable Models
_______________
M997, M997A1, M997A2
To o l s
____
General mechanic's tool kit:
automotive (Appendix G, Item 1)
M a t e r i a l s / P a rt s
_____________
Seven O-rings (Appendix E, Item 105)
(R-12 only)
Moisture seal (Appendix E, Item 152)
(R-12 only)
Lubricating oil (Appendix B, Item 35)
(R-12 only)
Two O-rings (Appendix E, Item 106)
(FR-12 only)
Lubricating oil (Appendix B, Item 35.1)
(FR-12 only)
O-ring (Appendix E, Item 104.2) (FR-12 only)
Four O-rings (Appendix E, Item 105)
(FR-12 only)
M a t e r i a l s / P a rts (Cont’d)
____________________
Moisture seal (Appendix E, Item 151.1)
(FR-12 only)
Manual Refere n c e s
________________
TM 9-2320-280-10
TM 9-2320-280-20
TM 9-2320-280-24P
Equipment Condition
_________________
• Air-conditioning system discharged (para. 14-17).
• Evaporator blower motor housing removed
(TM 9-2320-280-20).
General Safety Instructions
______________________
Air-conditioner system must be discharged, prior
to replacing components.
Maintenance Level
_______________
Direct support
1.
Disconnect high pressure line (10) from sight glass line (8). Remove and discard O-ring (9).
2.
Disconnect low pressure line (12) from evaporator outlet line (15). Remove and discard O-ring (13).
NOT E
Prior to removal, tag leads for installation.
3.
Disconnect two wires (11) from low pressure switch (14).
CAUTION
• Avoid kinking or excessive bending of cold control probe during removal.
• Evaporator coil and evaporator duct clearances are tight, avoid forcing or
twisting during removal.
4.
Remove cold control probe (7) from coils (3) and position probe (7) away from evaporator (2).
5.
Loosen clamp (5) and disconnect drain tube (6) from drain pan (4).
6.
Remove five screws (1) and evaporator (2) from evaporator duct (16).
.
WARNING
.
Air conditioner system must be discharged, prior to replacing components in
vapor system. Failure to do this may result in injury to personnel or damage to
equipment.
CAUTION
Cover or plug all open hoses and connections immediately after disconnection
to prevent contamination. Remove all plugs prior to connection.
a. Removal
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