Perkins — Pistons and Connecting Rods - Remove and Install
Repair & overhaul
From a Perkins service manual covering: 402D-05, 403D-07, 403D-11, 403D-15, 404D-22, 404D-22T, KENR6226-10. Check it applies to your exact model before use.
Applies to: Perkins 402D-05, Perkins 403D-07, Perkins 403D-11, Perkins 403D-15, Perkins 404D-22, Perkins 404D-22T
Before you start
- Keep all parts clean from contaminants.
Procedure
- Remove cylinder head and suction pipe.
- Position piston at bottom center.
- Remove carbon from cylinder bore.
- Remove nuts and connecting rod cap.
- Push piston and connecting rod out of cylinder bore.
- Keep bearings with respective rod and cap.
- Clean and lubricate components.
- Install piston rings with gaps 120 degrees apart.
- Install piston and connecting rod assembly into cylinder bore.
- Install connecting rod cap and nuts.
- Tighten nuts to specified torque.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Connecting rod nuts: 23 N·m, 32 N·m, or 52 N·m depending on model
Full service-parts list: Perkins 402D-05 →, Perkins 403D-07 →, Perkins 403D-11 →, Perkins 403D-15 →, Perkins 404D-22 →, Perkins 404D-22T →
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.