WASHER 4980498 - Caterpillar

Probable Causes
Injector
Leaking seals on the case of the injector
Leaking seals on the case of the barrel of the injector
Excessive leakage from the Injector tip
Breakage of the Injector tipCylinder Head
Cracked cylinder headFuel Transfer Pump
Fuel transfer pump sealRecommended Actions
Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
Leaking Seals on the Case of the Injector
Look for signs of damage to the seals on the case of the injectors. Replace any seals that are leaking.Leaking Seals on the Barrel of the Injector
Look for signs of damage to the seals in the barrel of the injectors. Replace any seals that are leaking.Excessive Leakage from the Injector Tip
Look for signs of damage to the tips of the injectors. If necessary, repair the injectors or replace the injectors.Breakage of the Injector Tip
Look for signs of damage to the tips of the injectors. If necessary, repair the injectors or replace the injectors.Cracked Cylinder Head
Look for signs of damage to the internal passages in the cylinder head for the fuel supply to the injectors. Check for pin hole leaks.Fuel Transfer Pump Seal
Ensure that the weep hole is not plugged. If necessary, repair the fuel transfer pump or replace the fuel transfer pump.