DISC-FRICTION 3534966 - Caterpillar

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Open the access door on the right side of the machine.
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Remove both fuel filters. Dispose of the used filters properly.
Clean the filter mounting base. Make sure that all of the used gasket is completely removed.
Apply a thin coat of clean diesel fuel to the seal on the new fuel filter. Install the new fuel filter hand tight until the seal of the fuel filter contacts the base. Note the position of the index marks on the filter in relation to a fixed point on the filter base. Note: There are rotation index marks on the fuel filter that are spaced 90 degrees or 1/4 of a turn away from each other. When you tighten the fuel filter, use the rotation index marks as a guide.
Do not fill fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to fuel system parts.
Tighten the filter according to the instructions that are printed on the filter. Use the index marks as a guide. For non-Caterpillar filters, use the instructions that are provided with the filter. Note: You may need to use a Caterpillar strap wrench, or another suitable tool, in order to turn the filter to the amount that is required for final installation. Make sure that the installation tool does not damage the filter.
Prime the fuel system. Reference: Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.
Start the engine. Check the fuel filters for leaks.
Close the access door.