Caterpillar — Fuel Tank Water and Sediment - Drain
Maintenance
From a Caterpillar owner's manual covering: C3.3, C3.3 Rental Generator Set, C4.4, C4.4 Rental Generator Set, D4D1-Up, GLE1-Up, N3X1-UP, N4R1-Up, N4X1-Up, X3B1-UP, XYC1-Up, XYD1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar C3.3, Caterpillar C4.4
Before you start
- Water in the fuel can cause excessive wear to the fuel system
- Dispose of all fluids according to local regulations and mandates
Procedure
- Open the drain valve on the bottom of the fuel tank.
- Drain the water and the sediment. Close the drain valve.
- Check the fuel daily. Drain after operating the engine or after the fuel tank has been filled.
- Allow five to ten minutes before performing this procedure.
- Fill the fuel tank after operating the engine in order to drive out moist air.
- Do not fill the tank to the top; fuel expands as it gets warm.
Full service-parts list: Caterpillar C3.3 →, Caterpillar C4.4 →
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.