Perkins 1104 — Electronic Unit Injector - Install

Maintenance

For the Perkins 1104, from the Perkins service manual.

Applies to: Perkins 1104, Perkins N H1 (Engine) engine

Procedure

1. Program correct injector trim file into ECM if replacement injector installed; record code X.
2. Use vacuum pump tube to remove fuel from cylinder.
3. Ensure fuel inlet port capped and injector clean.
4. Install new O-ring seal to injector; do not lubricate.
5. Clean injector seat; position new sealing washer.
6. Position clamp between rocker arm and valve springs; align injector to bore.
7. Install new torx screw to clamp; tighten finger tight.
8. Remove cap from injector; install new seal to injector and valve mechanism cover base.
9. Remove plugs from new fuel injection line; loosely install line.
10. Use T40 Torx socket to tighten torx screw to 27 N·m (20 lb ft).
11. Use injector pipe nut tool to tighten fuel injection line to 30 N·m (22 lb ft).
12. Install valve bridges.
13. Ensure pushrods seated; adjust valve lash.
14. Use deep socket to install harness to injector; tighten to 2.4 N·m (21 lb in).
15. Tighten banjo bolt for tube assembly to 22 N·m (16 lb ft).

Full service-parts list: Perkins 1104 →

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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