TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0006 00 0006 00-5 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 7. POOR ACCELERATION AND/OR LACK OF POWER (Contd) 8. Check turbocharger hoses and intake manifold elbow for leaks. 9. Inspect around cylinder head for evidence of a blown head gasket (e.g., air bubbles, oil, coolant, etc.). 10. Inspect radiator cap for milky film. 11. Inspect fuel shutoff for proper adjustment (WP 0071 00). 1. Tighten base screws and clamps. Replace any missing screws or clamps (WP 0051 00). 2. If there is no improvement during test run, turbocharger malfunction is indicated; replace turbocharger (WP 0057 00). Replace head gasket (WP 0027 00). If radiator cap has milky film on or around it, check cylinder heads and gaskets for defects (WP 0027 00). Adjust fuel shutoff to proper position (WP 0071 00). 8. ENGINE SURGES 1. Check fuel system for contamination and restrictions. 2. Inspect throttle linkage for proper operation and adjustment 3. Check in-tank fuel pump operation (WP 0061 00). Refer to WP 0006 00, table 1, malfunction 2, step 2. If linkage does not operate properly, adjust or replace as necessary (WP 0070 00). If fuel pressure is uneven or below specifications, replace in-tank fuel pump (WP 0061 00). 9. EXCESSIVE OIL LOSS OR CONSUMPTION DURING NORMAL OPERATION 1. Check oil level for overfilling (TM 9-2320-361-10). 2. Check for external oil leaks at oil pan, drainplug, oil filter, oil filter housing, oil cooler, oil dipstick tube, rocker arm cover, oil feed lines, and turbocharger. 3. Inspect radiator cap for milky film. 4. Verify engine idle speed is set within specifications (WP 0070 00). 5. Check oil pressure gauge for proper operation (WP 0014 00, table 1, malfunction 4). If oil level is too high, drain the crankcase to safe operating level (WP 0020 00). Tighten any loose connections or loose screws that may cause leaks. If radiator cap has milky film on or around it, check cylinder heads and gaskets for defects (WP 0027 00). If engine idle speed is incorrect, adjust (WP 0070 00). 1. Replace inoperative oil pressure gauge (WP 0095 00). 2. If oil pressure gauge has maximum reading of 60 psi (413kPa) and needle peaks at 60 psi (413kPa), replace with new oil pressure gauge (range 0–120 Table 1. Engine Troubleshooting Procedures (Contd).