Caterpillar 3406 — Prime Fuel System

Maintenance

For the Caterpillar 3406, from the Caterpillar operator's manual.

Applies to: Caterpillar 3406

Procedure

1. Be sure the fuel line valve is open and the engine shutoff control is off.
2. Unlock the fuel priming pump.
3. Operate the priming pump until resistance is felt. Fuel and air vents through the return line to tank.
4. Lock the fuel priming pump.
5. If the engine continues to misfire or smoke, further bleeding is necessary. With the engine running, loosen the fuel line nuts, one at a time, several times in succession and allow the fuel to run unt

Full service-parts list: Caterpillar 3406 →

Source: Caterpillar operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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