WARN I N G
DO NOT perform fuel system checks, inspecions, or maintenance while smoking or near
fire, flames, or sparks. Fuel may ignite.
Allow engine to cool before performing maintenance on fuel filter. Hot metal parts can
cause severe burns. Wear eye, hand, and skin protection when working with heated parts
Wear fuel-resistant gloves and eye protecton when handling fuels. If exposed to fuel,
promptly wash exposed skin and change fuel-soaked clothing.
Failure to follow these warnings may result in injury or death to personnel or damage to
C AU T I O N
Wipe area clean around fuel system. Contamination of fuel system could result in
FUEL SYSTEM INSPECTION
1. Verify fuel level in fuel tank. Ensure vent in fuel cap is not filled with dirt, and debris. Clean or replace if
2. Use prime pump to activate fuel system. Inspect fuel system for Class I, II, or III leaks and damage. Fuel lines
must be free from kinks, sharp bends, and restrictions. Verify fuel return line is not collapsed. Replace if
3. Inspect fuel for contamination, refer to Fuel Quality Test in this work package. If fuel is contaminated, drain and
clean fuel system (WP 0174 and WP 0175), and install new fuel filters (WP 0074, WP 0063, and WP 0066).
4. Cut old filters open with a suitable filter cutter. Inspect filter for excess contamination. Determine source of
contamination, clean and repair if condition is found.
END OF TASK
FUEL QUALITY TEST
C AU T I O N
It is important to maintain extreme cleanliness when working on fuel system, since even
tiny particles can cause engine or fuel system problems. Entire engine should be washed
with a high pressure water system to remove dirt and loose debris before starting a repair
on fuel system. Ensure no high pressure water is directed at seals for injectors. Failure to
follow caution may result in damage or contamination of fuel system.