WHEEL 7E0478 - Caterpillar

Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately.
Ensure that the engine is stopped before any servicing or repair is performed.
The water separator can be under suction during normal engine operation. Ensure that the drain valve is tightened securely to help prevent air from entering the fuel system.
Drain Procedure
Place a suitable container under the water separator to catch any fluid that might spill. Clean up any spilled fluid.
Ensure that the outer body of the filter assembly is clean and free from dirt.
Illustration 1 g03858194
Typical example
Install a suitable tube onto drain (3). Open the drain valve (2). Rotate the drain valve counterclockwise. Two full turns are required. Loosen vent screw (1).
Visually check that the fluid will drain. Allow the fluid to drain into the container.
When fluid free from water comes from the primary fuel filter, tighten the drain valve clockwise by hand pressure only. Remove the tube and remove the container.
Tighten the vent screw to a torque of 2.5 N m (22 lb in).