Perkins — To eliminate air from the fuel system - Bosch pump
Operation
From a Perkins service manual — check it applies to your exact model before use.
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Before you start
- If the engine runs correctly for a short time and then stops or runs roughly, check for air and a probable leak in the suction or low-pressure system.
Procedure
- Loosen the vent plug on top of the twin element fuel filter two or three turns (or the banjo connection bolt on a single element filter).
- Operate the priming lever on the fuel lift pump until fuel free of air comes from the vent point; tighten the vent plug.
- Ensure the manual stop is in the run position (or the start switch key at R).
- Loosen the union nut of the fuel inlet pipe and operate the priming lever until fuel free of air comes from the connection.
- Loosen the union nut at the fuelled starting aid if fitted and prime until fuel free of air comes from the connection.
- Loosen the high-pressure pipe connections at two of the atomisers.
- Operate the starter motor until fuel free from air comes from the pipe connections.
Source: Perkins service 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.