Caterpillar — Fuel System Primary Filter (Water Separator) Element - Replace
Maintenance
From a Caterpillar owner's manual — check it applies to your exact model before use.
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Before you start
- Do not fill fuel filters with fuel before installing them. The fuel will not be filtered and could be contaminated.
- The water separator element is under suction during normal engine operation. Tighten the drain valve securely in order to prevent air leakage into the fuel system.
Procedure
- Open the engine hood. The primary fuel filter is located on the right side of the machine.
- Open the drain valve on the bottom of the water separator bowl. Allow water and fuel to drain into a suitable container.
- Use a strap type wrench to remove the primary fuel filter. Unscrew the sediment bowl from the fuel filter.
- Clean the water separator bowl and the O-ring groove.
- Inspect the O-ring seal on the water separator bowl. Replace the O-ring seal, if necessary.
- Lubricate the O-ring seal with clean diesel fuel or engine oil. Place the O-ring seal in the water separator bowl.
- Install the water separator bowl onto the new filter element until the filter element is snug.
- Apply a thin coat of clean diesel fuel to the seal on the new filter. Install the new fuel filter hand tight until the seal contacts the base.
- Tighten the filter according to the instructions printed on the filter. Use the index marks as a guide.
- Close the drain valve.
- Prime the fuel system in order to fill the water separator element with fuel.
- Close the engine hood.
Tools required
- Strap type wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- The water separator bowl is reusable. Do not discard the water separator bowl.
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.