ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
Table 4-3. Unit Troubleshooting (Continued)
TEST OR INSPECTION
11. EXCESSIVE FUEL CONSUMPTION.
Step 1. Check air intake for blockage Check turbochargers for proper operation.
Clear obstructions, service air filters, or replace turbochargers as required.
Step 2. Check for plugged muffler or bends or obstruction In piping causing high exhaust back-pressure.
Repair or replace as necessary.
Step 3. Check for restricted fuel return lines, or fuel leaks.
Correct as necessary
Step 4. Check for high oil level.
Drain excess oil.
Step 5. Check Intake and exhaust valves, rocker arms, and crossheads for correct adjustment.
Adjust as necessary.
12. EXCESSIVE OIL CONSUMPTION.
Step 1. Check for external oil leaks.
Tighten all oil connections
Step 2. Check grade of oil being used against weather conditions that unit is being operated In.
Replace oil with proper grade.
Step 3. Check turbocharger crossover and exhaust casing for wetness
If wet, turbocharger is defective. Replace.
Step 4. Check engine crankcase breathers for obstructions
Clear any obstructions from breathers.
13. CRANKCASE SLUDGE.
Step 1. Check fuel quality.
Use only specified fuel.
Step 2. Check oil filter for dirt.
Replace filter. Check for leaks where dirt can enter engine and repair as necessary.
Step 3. Test thermostats for proper operation. Refer to paragraph 4-59.
Step 4. Change oil filters more often and observe oil temperature closely