John Deere — Remove Pistons and Connecting Rod Assemblies
Repair & overhaul · Pistons and connecting rods
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Do not rotate crankshaft with cylinder head removed unless liners are bolted down.
- Be careful not to let rod nick crankshaft bearing surface.
- Do not use pneumatic wrenches to tighten rod cap screws.
Procedure
- Drain all engine coolant and engine oil.
- Remove cylinder head.
- Remove oil pan and oil pump.
- Bolt down cylinder liners in seven locations with cap screws and flat washers; tighten to 68 N·m (50 lb-ft).
- Remove any ridges from liner bores with a scraper or ridge reamer before removing pistons.
- Remove rod cap screws and rod caps with bearings.
- Gently tap piston through top of cylinder block from the bottom.
- Once piston rings clear liner bore, hold piston to prevent dropping.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Cylinder liner cap screws for checking standout torque: 68 N·m (50 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.