TM-9-2320-334-13&P LHST Operator, Field and Parts Manual M1147A1 Trailer Download
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TM 9-2330-334-13&P THEORY OF OPERATION – Continued 0003 00 Change 1 0003 00-6 GENERAL The trailer is equipped with an air brake system which complies with the Federal Motor Vehicle Safety Standard (FMVSS) 121, S5.5. The trailer brake system operates in tandem with the towing vehicle brake system. The trailer brake system is made up of a number of components including EMERGENCY and SERVICE gladhand hoses, an air tank, an Anti-Lock Brake System (ABS) Electronic Control Unit (ECU), ABS external diagnostic capability, and several valves which control the application and release of the brakes. EMERGENCY AND SERVICE GLADHAND HOSES The EMERGENCY and SERVICE gladhand hoses provide air for operation of the trailer brakes from the towing vehicle. One hose is for SERVICE brake operation; the other hose is for EMERGENCY brake operation. Both hoses have gladhand couplings.