John Deere — Remove and Install Electronic Unit Injectors
Repair & overhaul · Electronic unit injectors (6 used)
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Dual rail and single rail injectors are different; DO NOT intermix.
- DO NOT use red or blue LOCTITE on solenoid studs.
Procedure
- Remove rocker arm cover.
- Remove rocker arm shaft assembly.
- Disconnect fuel lines and drain fuel from lines and fuel rail.
- Remove injector hold-down clamp cap screws.
- Pry upward on injector hold-down clamp with prybar.
- Remove injector and clamp; label for same cylinder location.
- Plug injector bore and remove/discard injector O-rings.
- Install two new O-rings lubricated with clean engine oil or AMOJELL; install injector and torque-turn clamp screws.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Hold-down clamp cap screws initial: 20 N•m (15 lb-ft)
- Hold-down clamp cap screws final torque-turn: 90—100°
- Harness connector nuts: 2 N•m (18 lb-in.)
Source: John Deere 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.