TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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4-124. NBC CONTROL PANEL REPLACEMENT (Cont’d) TM 9-2320-280-20-2 4-304 Change 3 NOTE • For M997, M997A1 and M997A2 ambulances, perform steps 8 through 14 for installation of leads to NBC fuse block. • For M996 and M996A1 ambulances, perform steps 15 through 19 for installation of leads to NBC fuse block. • Leads 787, 784, and 786 have two way jumpers connecting fuses for heaters 4 & 5, 6 & 7, and 2 & 3 respectively. NOTE M996 and M996A1 ambulances have three leads, 785, 786, and 787, secured to NBC control panel relay. WARNING Use care when installing leads to NBC control panel fuse block. Ensure lead clips lock into place. Failure to do so may cause damage to equipment and/or injury to personnel. 3. Install leads 784 (7), 787 (8), and leads 785 (9), 786 (10) onto NBC control panel relay (24) with nut (5) and lockwasher (6). 4. Install leads 783A (22) and 783B (23) and remaining lead from diode (28) onto NBC control panel relay (24) with plain-assembled nut (11). 5. Install leads 782 (25) and 782A (20) onto NBC control panel relay (24) with nut (26) and lockwasher (27). 6. Install leads 782A (20) and 783 (21) onto NBC control panel circuit breaker (13) with two screws (18) and lockwashers (19). 7. Install leads 783 (21) and 783A (22) onto NBC control panel ON/OFF toggle switch (35) with two screws (33) and lockwashers (34). 8. Install leads 787B (30) and 787 (8) into NBC fuse block (40) for heater fuse #4. 9. Install lead 787A (31) into NBC fuse block (40) for heater fuse #5. 10. Install lead 784B (32) into NBC fuse block (40) for heater fuse #6. 11. Install lead 784A (36) and 784 (7) into NBC fuse block (40) for heater fuse #7. 12. Install leads 785 (9) and 785A (39) into NBC fuse block (40) for heater fuse #1. 13. Install leads 786 (10) and 786B (38) into NBC fuse block (40) for heater fuse #2. 14. Install lead 786A (37) into NBC fuse block (40) for heater fuse #3. b. Installation 1. Install two cushioned wire clamps (17) with wire harness (14) in place onto NBC control panel (12) with screws (15) and plain-assembled nuts (16). 2. Install leads 795 (3), 796 (4) and lead 793 (2), and diode (28) onto NBC control panel relay ground (1) with plain-assembled nut (29).