TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 472 of 1205
REFERENCE INFORMATION 1 WARNING Make sure the area is clear of personnel and obstacles prior to performing this test. Failure to do so may result in serious injury. PARKING BRAKF TEST PROCFDURE: 1. Depress service brake pedal and start engine. 2. Place transmission shift lever in D (drive) and transfer case shift lever in H (high). 3. Apply parking brake. Slowly let up on service brake pedal. Vehicle should remain stationary. SFRVICF BRAKF ROAD TEST PROCFDURF- 1. On an open, smooth, flat surface, accelerate to a steady, reasonable, safe speed (below posted limits). 2. Apply pressure on the brake pedal and bring the vehicle to a stop. 3. Repeat this procedure several times, applying a different brake pedal pressure each time. Look for the following symptoms, which may indicate a problem with the service brakes: 1) Spongy or pulsating brake pedal. 2) Incomplete brake pedal return. 3) Excessive pull to one side. 4) Unusually long braking distance. 5) Front wheels lock up before rear wheels. 6) Brake warning light comes on while braking. 7) A squealing, grinding, or chattering noise while braking. TM 9-2320-387-24-l BRAKE SYSTEM 2-421