John Deere — Remove and Install Suction Control Valve
Repair & overhaul · Suction Control Valve (SCV)
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Avoid contamination to the fuel high pressure pump or the suction control valve; maintain a high level of cleanliness.
Procedure
- Thoroughly clean suction control valve area (solenoid connector, mounting area, surrounding surfaces).
- Disconnect the suction control valve wire connector; do not twist the connector.
- Loosen 2 retaining bolts with a 5 mm Allen hex tool; do not completely remove.
- Remove the valve from the pump body by hand, pulling straight out; do not twist or pry.
- Install a properly sized cap plug in the valve opening in the pump body.
- Remove and discard the 2 retaining bolts.
- Verify the overall reference length of the new valve to be 27.6 mm (1.09 in.).
- Confirm replacement parts in kit; lubricate O-rings with diesel fuel.
- Install large O-ring into groove in pump housing.
- Install new suction control valve into pump body by hand, pushing straight in.
- Install new retainer bolts; tighten evenly to 9 N•m (7 lb-ft).
- Connect suction control valve wire harness to electrical connector.
- Connect negative battery cable.
- Start engine, perform computer diagnostics, and check joint for fuel leaks.
Tools required
- 5 mm Allen hex tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Suction control valve reference length—27.6 mm (1.09 in.)
- Suction Control Valve to Pump Housing—9 N•m (7 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.