BOLT 2823655 - 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.
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, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component.
Illustration 1 g02459157
Fuel filter with priming pump
(1) Secondary fuel filter
(2) Air purge screw
(3) Fuel priming pump
Turn the ignition switch to the "OFF" position.
If necessary, fill the fuel tank with clean diesel fuel.
Turn the priming valve (if equipped) to the "CLOSED" position in order to prime the fuel system.
Open the air purge screw for the fuel filter by 3 full turns. Do not remove the air purge screw.
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Crank the engine for 30 seconds. Use a suitable container to catch the fuel while you crank the engine. Allow the starter motor to cool for 2 minutes. Note: You may use the fuel priming pump (if equipped) for the fuel filter instead of cranking the engine.
Crank the engine for 30 seconds. Allow the starter motor to cool for 2 minutes.
Repeat Step 6 until the engine starts and the engine runs. Note: Failure to tighten all fittings could result in serious fuel leaks.
After the engine has operated smoothly for 30 seconds, turn the priming valve to the "OPEN" position. Note: Shortened injector life may occur if the priming valve is left in the "CLOSED" position.
Clean any residual fuel from the engine components.