John Deere — Remove and Install Dual Rail Fuel Supply Pump
Repair & overhaul · Fuel supply pump (dual rail)
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Tighten ORFS fittings ONLY to specified torque. DO NOT OVERTIGHTEN.
Procedure
- Plug or cap all fuel system connections and passages as components are removed.
- Remove three fuel lines connected to fuel supply pump; cap lines and fittings.
- Remove four cap screws securing pump to mounting bracket; remove pump and discard O-ring.
- Remove tee fitting and straight fitting from pump and clean thoroughly.
- Install tee and straight fittings onto new pump with new O-rings in same orientation.
- Tighten drive coupler set screws on supply pump drive shaft with end of shaft flush with coupler ID.
- Position new rubber spider on drive coupler and new O-ring on face of supply pump.
- Apply AR54749 Soap Lubricant to new O-ring on mounting bracket if removed and install.
- Install pump with rubber spider meshed with coupler on rear of camshaft; install four cap screws and tighten.
- Install three fuel lines and tighten ORFS fittings to specification.
Tools required
- JDG998 Fuel System Cap Plug Kit Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel Supply Pump and Camshaft Drive Coupler Set Screws—Torque 4 N·m (3 lb-ft)
- Fuel Supply Pump Mounting Bracket Cap Screws—Torque 50 N·m (37 lb-ft)
- Fuel Supply Pump-to-Bracket—Torque 25 N·m (18 lb-ft)
- Fuel Line ORFS Fittings—Torque 24 N·m (18 lb-ft)
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.