Quantcast BRAKE TREADLE VALVE TEST - TM-9-2320-364-20-2_1039

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9.  SERVICE BRAKES ON AXLES NO. 3 THROUGH NO. 5 DO NOT RELEASE (CONT) - TM-9-2320-364-20-2_1038
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TM-9-2320-364-20-2 Truck Tractor Line Haul 52 000 GVWR 6x4 M915A2 Truck Tractor Light Equipment Transporter (Let) Manual
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9.  SERVICE BRAKES ON AXLES NO. 3 THROUGH NO. 5 DO NOT RELEASE (CONT) - TM-9-2320-364-20-2_1040
TM 9-2320-364-20-2      2-1815 Wear safety goggles when performing leakage tests on valves.  Failure to do so may result in serious eye injury due to high pressure air. If air lines are under high pressure when they are disconnected, they can whip around and cause injury to personnel.  Caution should be exercised when loosening or disconnecting air line fittings. (1)   Start engine and build air pressure to 125 4 psi (861 28 kPa) (TM 9-2320-364-10). (2)   Turn OFF ENGINE switch. (3)   Release PARKING BRAKE. (4)   Fully apply then release service brakes. (5)   Disconnect air line 2489 from front double check valve (top). (a)   If air escapes from air line 2489, perform Step (6) below and replace brake treadle valve (Para 12-4). (b)   If air does not escape from air line 2489, brake treadle valve is OK. (6)   Connect air line 2489 to front double check valve (top). BRAKE TREADLE VALVE TEST (1)   Disconnect air line 2684 from quick release valve. (2)   Connect a 0 to 160 psi (0 to 1103 kPa) gage to air line 2684. (3)   Observe pressure gage while assistant applies then releases service brakes (TM 9-2320-364-10). (a)   If air pressure is not released from 125 4 psi (861 28 kPa) to 0 psi quickly, perform Step (4) below and replace front double check valve (top) (Para 12-11). (b)   If air pressure is released quickly, valve is OK. (4)   Remove gage and connect air line 2684 to quick release valve. FRONT DOUBLE CHECK VALVE (TOP) TEST

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