TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 REFERENCE INFORMATION Replace hoses, refer to (para 8-26). STE/ICE-R TEST #50 0 TO 1000 PSIG PRESSURE 1. Connect transducer to valve after removing connector, refer to (para 8-26). Do offset test. 2. Connect BLUE pressure transducer to A W4 cable. Make sure the system under testis not pressurized. 3. Turn on system and read pressure. ENGINE COOLING Measure the pressure at the valve outlet. Remove the fan drive hose and connector from the valve body and screw transducer into the valve. Start the engine and look for leaks. Replace control valve and/or fan drive, refer to (para 8-26 or 3-78). Check to sea if hoses are blocked prior to replacing parts, and perform back flush procedure (para 8-26). If pressure in the fan drive hose is not at least 90 psi, (620.5 kPa) perform back flush procedure (para 8-26). Recheck pressure. If pressure is not at least 90 psi, replace control valve. If pressure in the fan drive hose is at least 90 psi, (620.5 kPa) check for blockage in hose between the control valve and fan drive. If hose is not blocked, replace fan drive (para. 3-78). 2-181