TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 336 of 1176
TM 9-2320-361-24-1 0018 00 0018 00-32 SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINE— REPROGRAMMABLE STE/ICE-R NO-GO CHAIN TROUBLESHOOTING (Contd) Table 2. STE/ICE-R No-Go Chain Test (Contd). VEHICLE FUEL PRESSURE M44A2 M35A2 50 PSI–70 PSI 50 PSI–70 PSI GOVERNOR/POWER TEST FAULT ISOLATION (Contd) NG90 TK MODE MEASURE FUEL PRESSURE AT HIGH IDLE: • Press TEST. • Start engine (TM 9-2320-361-10) and watch display. • Accelerate engine and hold at high idle (1000–1800 RPM). • Compare number on display with fuel pressure values listed below. 4 • Checked for crimped or broken lines. • Replace fuel filters (WP 0063 00 and WP 0064 00). • Check vehicle throttle linkage for full travel and proper adjustment. Repair if necessary (WP 0070 00). • If reading is still low, refer to Mechanical Systems Troubleshooting Index (WP 0007 00) to diagnose fuel system. • Is fuel within range? NO YES YES NO • Proceed to step 5. 5 TEST NO. TEST 50 0–1000 PSIG, PRESSURE • Proceed to TM 9-4910-571-12&P for fault isolation. NOTE After completing repair, rerun GO Chain tests (WP 0017 00) to verify that problem is fixed and no other problems exist. • Is offset value within range of –150 to + 150?