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 BRAKE SYSTEM PARKING BRAKE MASTER CYLINDER NO VISIBLE POSSIBLE PROBLEMS PADS CALIPERS PROPORTIONING VALVE MECHANICAL COMPONENTS INFO PARKING OK MASTER OK BRAKE OK POSSIBLE ROTORS CALIPERS VALVE HYDRO-BOOSTER COMPONENTS KNOWN PARKING BRAKE MASTER CYLINDER BRAKE PADS POSSIBLE PROBLEMS BINDING CALIPERS PROPORTIONING VALVE MECHANICAL COMPONENTS DIAGNOSTIC FLOWCHART zi+J TEST OPTIONS ARE THE BRAKE PADS FREE VISUAL FROM CONTAMINATION, DIRT, DISTORTION, AND EXCESSIVE WEAR? REPLACE PADS IN REASON FOR QUESTtON Dirty, bent, or thin brake pads could cause problems such as noisy brakes, erratic braking, or excessive pedal pressure. 85 1 i TE! ARE THE FOUR SERVICE BRAKE ROTORS FREE FROM HEAVY SCORING, EXCESSIVE WEAR, WARPING, HEAT-SPOTTING, GLAZING, AND CHIPPING? OPTIONS VISUAL REASON FOR QUESTION Damaged rotors reduce braking ability and speed up brake failure due to excessive heat buildup. (YES> TEST OPTIONS DO THE FOUR SERVICE BRAKE TRY TO ROTATE ROTORS WHILE WHEELS ARE RAISED. ROTORS ROTATE FREELY? REASON FOR QUESTION Sticky rotors can cause erratic braking behavior. 2-426