GEAR-PLANET 1521707 - Caterpillar

Do not fill the secondary fuel filter with fuel before installing. The fuel would not be filtered and could be contaminated. Contaminated fuel will cause accelerated wear to fuel system parts.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Note: Before you replace the secondary fuel filter, the primary fuel filter must be replaced. Refer to the Operation and Maintenance Manual, "Fuel System Primary Filter - Clean/Inspect/Replace".
Park the machine on a level surface. Ensure that the parking brake is fully engaged. Lower the dump body and shut off the engine.
Raise the hood. Refer to Operation and Maintenance Manual, "Hood Control".
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Use a strap wrench and remove the secondary fuel filter. Discard the secondary fuel filter properly.
Clean the fuel filter base.
Coat the seal for the new secondary fuel filter with clean diesel fuel prior to installation.
Install the new secondary fuel filter by hand. Do not use a tool for installation of the secondary fuel filter. When the new filter base gasket contacts the fuel filter base, tighten the secondary fuel filter by an additional 270°.
Prime the fuel system. Refer to the Operation and Maintenance Manual, "Fuel System - Prime".
Start the engine and check for leaks.
Lower the hood.