Perkins — Relief Valve (Fuel) - Remove and Install

Repair & overhaul · Fuel pressure relief valve

From a Perkins service manual — check it applies to your exact model before use.

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Procedure

1. Thoroughly clean the area around fuel manifold (2) and fuel pressure relief valve (1).
2. Disconnect plastic tube assembly from relief valve (1); cap port and plug tube.
3. Use a deep socket to remove the fuel pressure relief valve (1) from manifold (2).
4. Plug open port in manifold (2); cap relief valve (1).
5. Install: remove plug from port; clean threads in manifold (2).
6. Plug the open port in manifold (2) with a new cap after cleaning.
7. Remove cap from threaded end of relief valve (1); lubricate thread with clean fuel.
8. Use a deep socket to install relief valve (1) into manifold (2) hand tight.
9. Tighten to a snug torque of 30 N·m (266 lb in); rotate clockwise an additional 24 degrees.
10. Connect the plastic tube assembly to relief valve (1).
11. Remove air from the fuel system.

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.

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