PUMP GP-UNIT INJECTOR HYD 4768767 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00956351
550B and 560B
Illustration 2 g00782192
570B and 580B
Open the rear engine hood. Primary fuel filter (1) is located on the right side of the machine.
Open the drain valve on the bottom of water separator bowl (2). Allow the water and fuel to drain into a suitable container.
Remove primary fuel filter (1) from the mounting base.
Remove water separator bowl (2) from the fuel filter. Clean the water separator bowl and the O-ring groove.Note: The water separator bowl is reusable. Do not discard the water separator bowl.
Inspect the O-ring seal on water separator bowl (2) for damage. Replace the O-ring seal, if necessary.
Lubricate the O-ring seal with clean diesel fuel or with motor oil. Place the O-ring seal in the water separator bowl.
Install water separator bowl (2) onto the new fuel filter hand tight. Do not use tools to tighten the fuel filter.
Do not fill fuel filters with fuel before installing them. The fuel will not be filtered and could be contaminated. Contaminated fuel will cause accelerated wear to fuel system parts. The fuel system should be primed prior to starting the engine.
Install the new fuel filter. Rotate primary fuel filter (1) clockwise in order to securely tighten the filter to the mounting base.
Tighten the drain valve on the bottom of water separator bowl (2) .Note: The water separator is under suction during normal engine operation. The drain valve must be tightened in order to prevent air leakage into the fuel system.
Prime the fuel system in order to fill the water separator with fuel.Reference: Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.
Close the engine hood.