a. Removal
b. Installation
TM 9-2320-280-20-3
12-40. ARCTIC HEATER REGULATOR REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools
Manual References
General mechanic’s tool kit:
TM 9-2320-280-24P
automotive (NSN 5180-00-177-7033)
Equipment Condition
Materials/Parts
Arctic heater diverter box cover removed
Seal (Appendix G, Item 216)
(para. 12-47).
Four locknuts (Appendix G, Item 65)
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).
1.
2.
3.
4.
5.
6.
Install seal (2) on regulator (1).
Install regulator (1) on heat duct (8) and heater assembly (13).
Route two heater pipes (7) through two cowl grommets (6).
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).
Install inlet hose (4) and outlet hose (3) on heater pipes (7) with two clamps (5).
Install plenum hose (14) on regulator (1) with clamp (15).
FOLLOW-ON TASKS: Install arctic heater diverter box cover (para. 12-47).
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