Caterpillar — Fuel System - Prime (3056E)
Maintenance
From a Caterpillar owner's manual covering: 3054E, 3056E, C12. Check it applies to your exact model before use.
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Before you start
- Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes.
Procedure
- Loosen nut (2) on the fuel injection pump (1).
- Operate the priming lever (4) on the priming pump (3) until fuel flows out of nut (2) free of air.
- Tighten nut (2) to a torque of 23 N·m (17 lb ft).
- If the fuel line for the air inlet heater has been drained, loosen nut (5) and prime until free of air.
- Tighten nut (5) to a torque of 22 N·m (16 lb ft).
- Loosen flare nuts (6) for the high pressure fuel lines on all of the fuel injection nozzles.
- Operate the starting motor until the fuel is free of air.
- Tighten flare nuts (6) to a torque of 27 N·m (20 lb ft).
- Operate the engine at low idle for a minimum of five minutes.
Specs & values
- Nut (2) torque: 23 N·m (17 lb ft)
- Nut (5) torque: 22 N·m (16 lb ft)
- Flare nuts (6) torque: 27 N·m (20 lb ft)
Source: Caterpillar owner'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.