Perkins — Electronic Unit Injector - Install
Repair & overhaul
From a Perkins service manual — check it applies to your exact model before use.
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Before you start
- Do not torque fuel injection line nuts before final torque on injector clamp nuts.
Procedure
- If original injector, install into original location.
- If replacement injector, program seven digit injector code into ECM.
- Ensure fuel inlet port is capped and injector is clean.
- Install studs to cylinder head; tighten to 20 N·m.
- If reusing injector, install new sealing washer on nozzle.
- Remove plug from injector port in cylinder head.
- Ensure seat for injector is clean and sealing washer removed.
- Position clamp onto injector; align assembly to bore.
- Push only on injector clamp to install injector firmly against seat.
- Install washer and nut onto stud; tighten nut finger tight.
- Install new fuel injection line nuts hand tight.
- Tighten nuts to initial torque of 15 N·m.
- Tighten nuts to final torque of 25 N·m.
- Tighten fuel injection line nuts to 25 N·m.
- Install O-ring seal, hose assembly, clip, harness, and filters.
Specs & values
- 20 N·m studs
- 15 N·m initial nut
- 25 N·m final nut
- 25 N·m fuel line nuts
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.