Perkins — To fit the piston and connecting rod assembly
Repair & overhaul
From a Perkins service manual — check it applies to your exact model before use.
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Before you start
- Ensure the connecting rod will not hit the piston cooling jet
Procedure
- Clean and lubricate piston, cylinder liner, crank pin and big end
- Rotate crankshaft until relevant crank pin at lowest position; lubricate crank pin
- Fit upper half shell bearing; lubricate
- Fit piston replacer tool at top of cylinder with smaller end of taper towards block face
- Put ring gaps 120° apart; arrow on piston top towards front of engine
- Push assembly through tool onto crank pin, avoiding the piston cooling jet
- Fit cap with matching numbers; tighten fasteners; check crankshaft rotates freely
- Check piston height above cylinder block
Tools required
- Piston replacer tool 21855615 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Setscrews 155 Nm
- Nuts 125 Nm
- Piston height 0,36/0,50 mm above block face
Source: Perkins 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.