CB-434C Vibratory Compactor Caterpillar

Fuel System - Prime

Usage:

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Personal injury or death can result from a fire.
Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire.
Clean up all leaked or spilled fuel. Do not smoke while working on the fuel system.

Turn the disconnect switch OFF or disconnect the battery when changing fuel filters.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates.

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Illustration 1	g00899122

Open the engine access door on the right hand side of the machine.

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Illustration 2	g00903647

Operate the fuel lift pump for two minutes. Operate the fuel lift pump until resistance is felt.

Open the fuel supply valve.

Turn the engine start switch key to the START position. Crank the engine. If the engine does not start, continue to prime the engine. If the engine starts and the engine misfires or the engine smokes, continue to prime the engine.

If the engine starts and the engine runs rough, continue to run the engine. Run the engine until the engine is smooth.

If the engine will not start, loosen the fuel line nuts at two of the fuel injector nozzles in order to purge the fuel lines of air. This will prevent air bubbles from entering the fuel injector nozzles.

Crank the engine until the fuel flows free of air bubbles. You should be sure to tighten each fuel line nut. Tighten the nuts to 18 ± 4.5 N·m (13.3 ± 3.3 lb ft). If the engine starts, run the engine until the fuel flows free of air pockets in the fuel lines.