TM-9-2320-280-20-3
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 3 OF 3
JANUARY 1996
TM-9-2320-280-20-3 - Page 657 of 1168
FOLLOW-ON TASK: Install arctic heater diverter box cover (para. 12-47).
12-40. ARCTIC HEATER REGULATOR REPLACEMENT
This task covers:
a. Removal
b. Installation
a. Removal
1.
Loosen clamp (15) and disconnect plenum hose (14) from regulator (1).
2.
Remove four locknuts (9), washers (10), capscrews (11), and washers (10) from heater assembly (13)
and cowl panel (12) and pull heater assembly (13) away from cowl panel (12). Discard locknuts (9).
3.
Loosen two clamps (5) and remove two heater pipes (7) from inlet hose (4), outlet hose (3), and
two
cowl grommets (6).
4.
Disconnect regulator (1) from heat duct (8) and remove regulator (1) from heater assembly (13).
5.
Remove seal (2) from regulator (1). Discard seal (2).
Manual References
TM 9-2320-280-24P
Equipment Condition
Arctic heater diverter box cover removed
(para. 12-47).
b. Installation
1.
Install seal (2) on regulator (1).
2.
Install regulator (1) on heat duct (8) and heater assembly (13).
3.
Route two heater pipes (7) through two cowl grommets (6).
4.
Install heater assembly (13) on cowl panel (12) with four capscrews (11), washers (10), locknuts (9),
and washers (10). Tighten locknuts (9) to 17 lb-ft (23 N
•
m).
5.
Install inlet hose (4) and outlet hose (3) on heater pipes (7) with two clamps (5).
6.
Install plenum hose (14) on regulator (1) with clamp (15).
TM 9-2320-280-20-3
12-58
Change 2
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Seal (Appendix G, Item 287)
Four locknuts (Appendix G, Item 79)
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