TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
25. ENGINE HAS HIGH EXHAUST TEMPERATURE (HOT, THICK EXHAUST SMOKE) (CONT)
Step 4. Check fuel injection timing. (See TM 10-3930-641-20.)
Adjust timing. (See TM 10-3930-641-20.)
Step 5. Check fuel rack setting.
Adjust setting. (See TM 10-3930-641-20.)
Step 6. Check valve clearance.
Adjust valve clearance. (See page 3-268.)
Step 7. Check cylinder compression. (See TM 10-3930-641-20.)
Replace defective components (See pages 3-355, 3-217.)
26. VALVE CLEARANCE GREATER THAN SPECIFICATION
Step 1. Check for defects.
Adjust valve clearance if no defects. (See page 3-268.)
Step 2. Defects can be caused by improper lubrication.
Check oil flow according to malfunction no. 10, step 2.
Step 3. Inspect rocker arm for wear at face that contacts bridge. (See page 3-211.)
a.
Replace rocker arm. (See page 3-207.)
b.
Adjust valves. (See page 3-268.)
NOTE
When adjusting rocker arms, measure clearance between rocker arm face and bridge.
Step 4. Inspect bridge for wear. (See page 3-217.)
a.
Replace bridge. (See page 3-217.)
b.
Adjust valve clearance. (See page 3-268.)
Step 5. Inspect push rods for wear. (See page 3-264.)
Replace push rods. (See page 3-264.)
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