Perkins — Rocker Shaft and Pushrod - Remove and Install
Repair & overhaul · Rocker shaft and pushrods
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 engine oil line and valve mechanism cover.
- Loosen nuts and adjustment screws on all rocker arms.
- Remove bolts and nuts from rocker shaft assembly.
- Remove rocker shaft assembly from cylinder head.
- Identify caps and pushrods.
- Remove pushrods and caps.
- Install new joint to rocker shaft base.
- Lubricate pushrods and install with cup upward.
- Install caps to valve stems.
- Install rocker shaft assembly.
- Install nuts and tighten to specified torque.
Tools required
- Deep socket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Rocker shaft nuts: 10 N·m, 23 N·m, or 33 N·m depending on model
- Rocker shaft bolts: 10 N·m
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.