TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 3 Download
Page 657 of 1170
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)