TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l ENGINE COOLING DIAGNOSTIC FLOWCHART - ENGINE FAN NOT WORKING PROPERLY T OPTlONS LOOK FOR CRACKED OR BROKEN BLADES. INSPECT THE COOLING FAN. ARE THE FAN BLADES ALL INTACT? I POSSIBLE PROBLEMS REASON FOR QUESTION A damaged fan doas not cool efficiently and could be dangerous to FAN OR SERPENTlNE BEL- WIRING FAN TIMER FAN SOLENOID FAN TEMPERATURE SWITCH PCB r t A2 ] ITI I KNOWN INFO T OPTIONS IS THE SERPENTINE BELT IN GOOD CONDITION? FAN OK VISUAL INSPECTION OF BELT TENSIONER POSITION. 1 POSSIBLE PROBLEMS 1 REASON FOR QUESTION SERPENTINE BELT FAN WIRING FAN TIMER FAN SOLENOld FAN TEMPERATURE SWlTCH PCB lf belt tensioner has fully retracted, belt is to be replaced ttxause it will not drive the fan PwedY. T OPTIONS TRY rr. KNOWN INFO L FAN OK SERPENTINE BELT OK WITH THE VEHICLE OFF, TRY TO TURN THE FAN BY HAND. ARE YOU UNABLE TO TURN IT? REASON FOR QUESTION fou should not be able to turn the hn by hand. If you can, the fan POSSIBLE PROBLEMS FAN DRIVE FAN WIRING FAN TIMING FAN SOLENOID FAN TEMPERATURE SWITCH PCB -