Caterpillar 950F Excavator Fuel System Secondary Filter Number One Replacement Guide

 This instruction show you guide on how to replace secondary filter number one 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.

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.

 

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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 upper filter (2) 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.
2. Hand tighten the upper filter until the seal contacts the filter base. Then, tighten upper filter
(2) by an additional 3/4 turn.
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.
3. Remove lower filter (1)

Note: Lower filter (1) has not been drained. The filter contains fuel. When you remove the lower filter, use caution in order to avoid spilling the fuel.
4. Inspect the fuel filter element for debris by cutting the filter open. Discard the used fuel filter element properly.
5. Clean the filter mounting base. Make sure that all of the used seal is removed from the filter mounting base.

6. Apply a thin coat of clean diesel fuel to the sealing surface of the new fuel filter element.

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7. 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.
8. Prime the fuel system.
Reference: Refer to Operation and Maintenance Manual, “Fuel System - Prime” for the correct procedure.
9. Close the engine access door.