Caterpillar 950F Fuel Secondary Filter Number Two Replacement Guide
This instruction show you guide on how to replace secondary filter number two for Caterpillar 950F excavator.
Personal injury or death can result from a fire.
Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire.
Clean up all leaked or spilled fuel. Do not smoke while working on the fuel system.
Turn the disconnect switch OFF or disconnect the battery when changing fuel filters.
NOTICE
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.
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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.
NOTICE
Do not fill fuel filters with fuel before installing them.
Contaminated fuel will cause accelerated wear to fuel system parts.
Open the engine access door. The secondary fuel filter is located on the right side of the machine.
Note: This machine is equipped with two secondary spin-on filters on a single filter base. The upper filter is upside-down. Always drain the inverted filter before you remove either filter.
1. To drain upper filter (2) (inverted filter), place a suitable container under the drain valves and open drain valve (3). Then, immediately open drain valve (4) and allow the fuel to drain into the suitable container.
When the fuel stops draining, keep the drain valves open and loosen the inverted filter by a 1/4 turn. As the filter is loosened, additional fuel may drain from the drain valves. Keep turning the filter by 1/4 turns until fuel does not drain from the drain valves. Then, close the drain valves and properly dispose of the fuel.
Note: Make sure that the drain valves are opened in the proper order. If you open the wrong drain valve first, an air lock in the fuel system may occur. This will not allow fuel to drain from the upper filter.
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2. Remove upper filter (2).
3. Inspect the fuel filter element for debris by cutting the filter open. Dispose of the used fuel filter element properly.
4. Clean the filter mounting base. Make sure that all of the used seal is removed from the filter mounting base.
5. Apply a thin coat of clean diesel fuel to the sealing surface of the new fuel filter element.
6. Install the new fuel filter element by hand. When the seal contacts the filter base, tighten the fuel filter element by an additional 3/4 turn. This will tighten the fuel filter element sufficiently.
Rotation index marks are positioned on the filter at 90 degree intervals. Use these rotation index marks as a guide when you tighten the filter.
7. Prime the fuel system.
Reference: Refer to Operation and Maintenance Manual, “Fuel System - Prime” for the correct procedure.
8. Close the engine access door.
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