TM 5-3805-261-20
FUEL SYSTEM TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
d.
ENGINE HAS LOW FUEL SUPPLY/LOW FUEL PRESSURE.
Step 1. Check for fuel in fuel injection pump housing. Refer to paragraph 6-15.
Bleed injection lines. Refer to paragraph 6-15.
Step 2. Check for problems causing low fuel pressure.
Check level of fuel in tank. Check to see that vent hole in tank cap is clean. Refer to TM 5-3805-261-10.
Fill fuel tank and clean vent hole in tank cap. Refer to TM 5-3805-261-10.
Remove and inspect fuel filters.
Replace filters and gaskets if necessary. Refer to paragraphs 6-25 and 6-26.
Look for broken or leaking fuel lines.
Replace defective fuel lines. Refer to paragraphs 6-15 and 6-22.
Step 3. Check for bad fuel. If bad, fuel will have a milky-white color. Refer to TM 5-3805-261-10.
Drain bad fuel. Refer to TM 5-3805-261-10. Replace fuel filters. Refer to paragraphs 6-25 and 6-26.
Bleed injection lines. Refer to paragraph 6-15.
Step 4. Check if fuel "cloud point" is correct for weather conditions. ("Cloud point" is temperature at which wax
forms in fuel.) Refer to TM 5-3805-261-10.
If fuel is clouded, drain. Refer to paragraph 6-24. Bleed injection lines. Refer to paragraph 6-15. Replace
fuel filters. Refer to paragraphs 6-25 and 6-26.
Fill tank with fuel having the correct "cloud point." Refer to TM 5-3805-261-10.
Bleed injection lines. Refer to paragraph 6-15.
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