HEAD 4934152 - Caterpillar

Open air purge screw (1) for the fuel filter by three full turns. Do not remove the air purge screw.
While you operate the hand priming pump (2), observe air purge screw (1). When a small drop of fuel appears at the threads of the air purge screw, close and tighten air purge screw (1) .Note: Failure to tighten all fittings could result in serious fuel leaks.
Clean any residual fuel from the engine components.
Continue to operate the fuel priming pump (2) until a strong resistance is felt. Listen for an audible click from the fuel manifold. The click will indicate that the valve has opened and the fuel system is pressurized. Lock the fuel priming pump (2) .
Do not crank the engine for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking again.
Crank the engine. If the engine starts but the engine runs rough, continue to operate the engine at low idle until the engine runs smoothly.Note: If the engine will not start, further priming is necessary. If the engine starts but the engine continues to misfire or smoke, further priming is necessary. C-15 Truck Engines
The Secondary Fuel Filter Has Been Replaced
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