TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 194 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION FUEL SYSTEM 1. Connect RED clip to the indicated test point; BLACK clip to negative or ground. 2. Start Test 90. 3. Displayed reading is in amps. WARNING Diesel fuel is highly flammable. Do not perform any procedures near fire, flames, or sparks. Severe injury or death may result. 1. Disconnect the return line and direct it into a suitable container. 2. Watch the fuel flow from the return line as you or an assistant try to start the engine. Change 2 2-107 NOTE When using a multimeter to measure current through wire 54A, disconnect the wire. Set the ammeter to a scale of at least 5 amps DC. Connect the red lead of the multimeter to wire 54A and the black lead to ground. With the rotary switch in the RUN position, measure current. Be sure to read the correct scale. Return the switch to the STOP position. Disconnect the multimeter and reconnect wire 54A. 5 AMPS DC STE/ICE-R TEST 89 1. Select Fuel Supply Pressure Test (Test #24). Perform CAL. 2. Crank (or start) engine. FUEL PUMP PRESSURE STE/ICE-R TEST #24 1. Disconnect fuel line at injection pump inlet and route fuel line into a suitable, 1 quart container. 2. Crank the engine for 30 seconds. 3. If the pump and lines are ok, you should get about 1 pint (1/2 quart) (0.5L) in 30 seconds. FUEL PUMP VOLUME TEST 1. Connect a tee into the fuel line between the fuel filter outlet and the injection pump inlet. 2. Attach gauge to tee. 3. Crank (or Start) engine. FUEL PUMP PRESSURE TEST PRESSURE GAUGE !! GLOWPLUG CONTROLLER/ TEMP SENSOR WIRE 54A FUEL RETURN LINE FUEL SOLENOID WIRE 569B/569D