John Deere 4045 / 6068 — Remove and Install High Pressure Common Rail
Repair & overhaul · High Pressure Common Rail (HPCR)
For the John Deere 4045 / 6068, from the John Deere service manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- Wait a minimum of 15 minutes after engine is stopped before disconnecting any high pressure fuel lines.
Procedure
- Disconnect pressure sensor wiring harness.
- Disconnect leak-off line (C) from elbow fitting.
- Remove pump-to-rail high pressure lines (B).
- Remove high pressure delivery lines (D) from rail. Do not remove flow damper (H).
- Loosen cap screw (F), then remove the high pressure common rail (A) from engine.
- Install bracket (G) on engine. Install rail on bracket, tighten cap screw to specification.
- Install high pressure delivery lines (D). Tighten to specification.
- Install pump-to-rail high pressure lines (B). Tighten to specification.
- Connect leak-off line (C) to elbow fitting; tighten tube nut until seated.
- Connect wiring harness to pressure sensor (E).
- Bleed fuel system.
Specs & values
- High pressure common rail bracket to engine 70 N·m (52 lb-ft)
- High pressure common rail to bracket 70 N·m (52 lb-ft)
- High pressure delivery lines to rail 30 N·m (22 lb-ft)
- Pump-to-rail high pressure lines 30 N·m (22 lb-ft)
Full service-parts list: John Deere 4045 →, John Deere 6068 →
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.