John Deere — Install Fuel Injection Pump
Repair & overhaul
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- NEVER operate injection pump without engine lubricating oil in pump housing.
- DO NOT move delivery valve fittings while tightening line nuts.
Procedure
- Rotate flywheel until timing pin enters at No. 1 cylinder TDC compression stroke.
- Rotate pump drive hub until marks on drive hub and pointer are aligned.
- Thread JDG886 Timing Pin into drive hub and tighten until it bottoms against bearing plate.
- Install a new O-ring on pump mounting hub, lubricated with soap.
- Install injection pump with forward pressure and slight rocking motion; flange must seat against cylinder block.
- Install mounting stud nuts and tighten to 47 N-m (35 lb-ft).
- Install drive gear and four drive gear-to-pump hub cap screws; tighten to 61 N-m (45 lb-ft).
- Remove timing pin, install timing hole plug with LOCTITE 242, install drive gear cover with new gasket (27 N-m).
- Connect fuel delivery lines (27 N-m), leak-off assembly and fuel inlet line.
- Remove oil fill plug and add clean engine oil until oil comes out fill hole.
- Service fuel filter and water separator; bleed the fuel system.
Tools required
- JDG886 Injection Pump Timing Pin Amazon
- T45 TORX adapter Amazon
- JDE90 Serrated Wrench Amazon
- JDF22 Crowsfoot Wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Mounting stud nuts 47 N-m (35 lb-ft)
- Drive gear-to-hub cap screws 61 N-m (45 lb-ft)
- Line nuts 27 N-m (20 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.