ARMY TM 9-6115-604-12NAVY NAVFAC P-8-633-121.ADAPTER24ADAPTER2.SHUT OFF VALVE25.HOSE ASSEMBLY3.ELBOW26STRAIGHT ADAPTER4.ADAPTER27HOSE5.COOLANT BAND MARKER28.CAPSCREW6.HOSE ASSEMBLY29.HEXAGONAL NUT7STRAIGHT ADAPTER30LOCKWASHER8.HOSE ASSEMBLY31FLAT WASHER9.NIPPLE32BRACKET10.NIPPLE33HEATER ASSEMBLY H101, H10211.SHUT OFF VALVE34.HEATING ELEMENT12.ELBOW35.HOSE CLAMP13.ELBOW36NIPPLE14CAPSCREW37HOSE15.HEXAGONAL NUT38.HEXAGONAL NUT16.LOCKWASHER39.BELL CAP17.CLAMP40THERMOSTAT SENSING UNIT18.BRACKET41THERMOSTAT BURR19.HOSE ASSEMBLY42HEXAGON HEAD CAPSCREW20STRAIGHT ADAPTER43.LOCKWASHER21.HOSE44HEAD AND VALVE ASSEMBLY22.NIPPLE45.DRAIN PLUG23TEE46.HEATING TANKFigure 4-46. Engine Preheat Assembly (Sheet 3 of 3)d.Install.(1) Apply sealing compound MIL-S-45180, Type II, to all male pipe threads prior to installation.(2) Thread heating elements (34) into heating tanks (46) and tighten.(3) Install thermostat sensing assemblies consisting of thermostat burr (41), thermostat sensing unit (40), fill cap (39), and nut (38) on nipples (36) at ends of heater assemblies (33).(4) Install replacement hose assemblies (6, 19, and 25) on engine block plumbing hardware by tightening hose adapters (7, 20, and 26).(5) Slide heater assemblies H101 and H102 (33) under mounting brackets (32) and attach using capscrews (28), nuts (29), and lockwashers (30).(6) Reconnect center hose assembly (25) and associated plumbing hardware to thermostat burrs (41) at end of each heater assembly (33) using adapter (24) and nipple (22).(7) Reconnect hose assemblies (19) to elbows (13) on each heater assembly and tighten hose adapters (20).(8) Reconnect wiring to thermostat sensing units (40) and heating element (34) on each heater assembly (33). Remove tags and discard.(9) Open all shutoff valves (2 and 11).(10) Check coolant level and fill as required.4-130
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