GEAR (61 teeth) 7G4312 - 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.
Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately.
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.
If the fuel system runs out of fuel or if air is introduced into the fuel system the following procedure may be followed.
Turn the ignition switch to the "OFF" position.
Fill the fuel tank(s) with clean diesel fuel.
Illustration 1 g00474457
Typical example (1) Air purge screw (2) Fuel priming pump (IF EQUIPPED)
Open air purge screw (1) for three 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: After four or five cranking intervals, most of the air should be purged from the system.
Crank the engine for 30 seconds. Allow the starter motor to cool for 2 minutes.
Repeat Step 5 until the engine starts and runs. If the engine runs rough, continue