LATCH 2171514 - Caterpillar

Lever Operated Pump
If the engine runs out of fuel or the fuel system filter is replaced, it is necessary to prime the fuel system.
Illustration 1 g00520652
Early type
Open the engine access door.The fuel priming pump is located on the left side of the engine and behind the fuel filter.
Illustration 2 g00520653
The vent screw for the fuel system is located on the fuel inlet connection. Turn the vent screw for two or three revolutions counterclockwise.
In order to operate the hand fuel priming pump, push down on the top of the lever and release the lever. Operate the hand fuel priming pump in order to fill the new filter element. Continue to pump until fuel that is free of air flows from the vent. Tighten the vent screw to 6 1 N m (4.4 0.74 lb ft).Note: The engine is most easily primed if the drive cam of the pump is at the point of minimum lift. If you are not able to prime the engine, consult your Caterpillar dealer.
Start the engine. If the engine will not start, further priming is necessary. If the engine starts but the engine continues to misfire, further priming is necessary. If the engine starts but the engine continues to emit smoke, further priming is necessary.
If the engine starts but the engine runs rough, continue to run the engine at low idle. Continue to run the engine at low idle until the engine runs smoothly.Plunger Operated Pump
Open the engine access door.
Illustration 3 g01039912
Later type
Unlock the priming pump plunger. Operate the priming pump plunger until a resistance is felt.
Crank the engine.Priming the pump is required if any of the following problems exist:
The engine does not start.
The engine misfires.
The engine emits smoke.
If the engine starts but the engine runs rough, continue to run the engine at low idle. Run the engine at low idle until the engine runs properly.
Check the fuel system for leaks. Stop the engine.
Close the engine access door.