Paccar MX-13 – Draining fuel filtration module

1. Open the filler screw cap of the fuel tank to prevent overpressure in the fuel system.
2. Thoroughly clean the fuel filter screw cap and the area.
Prevent dirt from entering the fuel system.
3. Unscrew the fuel filter cap a few turns until the O-ring is fully visible and wait until the filtration module is fully drained.
Use only a socket or box wrench.
Do not further unscrew the fuel filter cap until the module is drained.
4. Remove the fuel filter screw cap with fuel filter element from the filtration unit.

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