TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34  14-11. AMBULANCE HEATER REPAIR (MODEL 10530B) (Cont’d)  25. Remove nut and lockwasher assembly (4), screw-assembled lockwasher (3), ground strap (6), and  lockwasher (5) from heater body (1). Discard lockwasher (5), nut and lockwasher assembly (4), and  screw-assembled lockwasher (3).  26. Remove locknut (7) and ground strap (6) from hookbolt (2). Discard locknut (7).  27 Scribe alignment marks (13) on burner assembly (12) and heat exchanger (8) to ensure proper  alignment of burner assembly (12) and heat exchanger (8) during assembly.  28. Remove screw (9) securing heater body (1) together, spread heater body (1) just enough to clear  exhaust outlet (16), and remove heat exchanger (8) and burner assembly (12) from heater body (1).  29. Remove four locknuts (11), clamps (10), hookbolts (2), and burner assembly (12) from heat exchanger  (8). Discard locknuts (11).  30. Remove gasket (15) and O-ring (14) from burner assembly (12). Discard gasket (15) and O-ring (14).  14-58