Caterpillar 3406E Marine Engine — Rocker Arm and Shaft - Remove
Repair & overhaul
For the Caterpillar 3406E Marine Engine, from the Caterpillar service manual.
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Before you start
- Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.
- 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.
- If the engine is equipped with a compression brake, skip Step 1.
- Start By: a. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install". b. Remove the compression brake, if equipped. Refer to Disassembly and Assembly, "Compression Brake - Remove".
Procedure
- Remove bolts (2).
- Remove rocker shaft (3), valve rocker arms (1), and unit injector rocker arms (4) as a unit with Tooling (A).
- Repeat Steps 1 and 2 for the remainder of the rocker arm assemblies.
Tools required
- 124-2946 Lifting Bracket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Caterpillar 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.