John Deere — Install Rocker Arm Assembly
Repair & overhaul
From a John Deere service manual covering: 4039, 4045, 6059, 6068. Check it applies to your exact model before use.
Applies to: John Deere 4039, John Deere 4045, John Deere 6059, John Deere 6068
Before you start
- Oil supply hole in rocker arm shaft must be positioned at the flywheel end of engine and facing downward when rocker shaft is installed.
Procedure
- Install push rods in same location from which removed.
- Relieve tension on rocker arm adjusting screw to avoid damaging rocker arm shaft.
- Position rocker arm assembly on engine.
- Lubricate all rocker arms with engine oil and make sure they move freely.
- Tighten rocker arm support cap screws in criss-cross sequence to 47 N•m (35 lb-ft).
- Adjust valve clearance.
- Install rocker arm cover.
Tools required
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Rocker arm support cap screws 47 N·m (35 lb-ft)
- Rocker arm cover cap screws 11 N·m (8 lb-ft) (96 lb-in.)
Full service-parts list: John Deere 4039 →, 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.