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Home›Repair guides›Valve Mechanism Cover Base - Remove and Install

Caterpillar — Valve Mechanism Cover Base - Remove and Install

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

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Before you start

  • Keep all parts clean from contaminants.
  • Before assembly, check the condition of the seal. If the seal is worn or damaged, use a new part for replacement.

Procedure

  1. Start By: Remove the valve mechanism covers.
  2. Removal: Disconnect harness assembly (3) from the electronic unit injector.
  3. Removal: Disconnect harness assembly (1) from valve cover base (2).
  4. Removal: Remove bolts (4).
  5. Removal: Remove valve cover base (2).
  6. Installation: Position valve cover base (2) on the cylinder head and install bolts (4). Tighten bolts (4) to a torque of 18 ± 3 N·m (13 ± 2 lb ft) in the numerical sequence shown in the illustration.
  7. Installation: Connect harness assembly (1).
  8. Installation: Position harness assembly (3) on the electronic unit injector. Tighten the cap nuts to a torque of 2.5 ± 0.25 N·m (22 ± 2 lb in).
  9. End By: Install the valve mechanism covers.

Specs & torque values

  • Cover base bolt tightening torque: 18 ± 3 N·m (13 ± 2 lb ft)
  • Injector harness cap nut tightening torque: 2.5 ± 0.25 N·m (22 ± 2 lb in)

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.