30. STALLS UNDER DECELERATION OR HEAVY BRAKING

TM 9-2320-289-34 Table 2-1. Mechanical Troubleshooting (Con’t) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 4. Remove engine oil pan, (See TM 9-2320-289-20) Inspect connecting rods to see if any are bent. Replace any bent connecting rods. (See paragraph 3-1 3) Step 5. Remove pistons (see paragraph 3-1 3) and check piston-to-cylinder bore clearance. (See paragraph 3-13, CLEANING AND INSPECTION, steps 9 and 10) 30. STALLS UNDER DECELERATION OR HEAVY BRAKING Step 1. Check idle speed, (See TM 9-2320-289-20) Step 2. Remove governor Cover^-. (See paragraph 3-38) Check for black particles, If black particles are evident, replace governor weight retaining ring. (See paragraph 3-42) Step 3. Remove governor cover. (See paragraph 3-38) Operate throttle shaft and observe governor assembly and metering valve for binding. If there is binding, remove governor assembly and metering valve. (See paragraph 3-39) Replace any damaged components. Clean metering valve with calibration fluid. (Item 13, Appendix B) Reinstall governor assembly and metering valve. If binding continues, replace metering valve. 31. EXCESSIVE SURGE AT LIGHT THROTTLE Step 1. Check fuel injector pump timing. (See paragraph 3-44) Step 2. Check for restrictions in fuel lines. Clear or replace restricted fuel lines, (See paragraph 3-5 or TM 9-2320-289-20) If no restrictions are obvious, replace fuel filter. (See TM 9-2320-289-20) Step 3. Test each fuel injector nozzle, (See paragraph 3-36) 32. MISFIRES ABOVE IDLE OR RUNS ROUGH WHILE DRIVING (IDLES NORMALLY) Step 1. Check fuel injector pump timing. (See paragraph 3-44) Step 2. Check for restrictions in fuel lines. Clear or replace restricted fuel lines. (See paragraph 3-5 or TM 9-2320-289-20) If no restrictions are obvious, replace fuel filter. (See TM 9-2320-289-20) 2 - 22 Change 2