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Home›Repair guides›Rocker Arm and Shaft - Remove and Install

Caterpillar — Rocker Arm and Shaft - Remove and Install

A Caterpillar service procedure — check it applies to your exact model before use.

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Before you start

  • Valve rocker arms and unit injector rocker arms can move on the shaft after the bolts have been removed. The shaft should be kept level when removed from the cylinder head. To avoid possible personal injury, keep fingers clear of the valve rocker arms and the unit injector rocker arms when lifting the assembly from the cylinder head.
  • Keep all parts clean from contaminants.

Procedure

  1. Start By: Remove the valve mechanism cover.
  2. Removal: Remove bolts (2).
  3. Removal: Remove shaft (3), valve rocker arms (1), and unit injector rocker arms (4) as a unit with Tooling (Lifting Bracket).
  4. Removal: Repeat the removal steps for the remainder of the rocker arm assemblies.
  5. Installation: Install rocker shaft (3), valve rocker arms (1), and unit injector rocker arms (4) as a unit with Tooling (Lifting Bracket). Install rocker shaft with the flat side facing upward.
  6. Installation: Install bolts (2). Tighten bolts (2) to a torque of 109 ± 15 N·m (80 ± 11 lb ft).
  7. Installation: Repeat the installation steps for the remainder of the rocker arm assemblies.
  8. End By: Install the valve mechanism cover.

Tools required

  • Lifting Bracket, Tool 124-2946

Specs & torque values

  • Rocker shaft bolt tightening torque: 109 ± 15 N·m (80 ± 11 lb ft)

Source: manual:3456 Disassembly and Assembly.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.