Caterpillar C-3406B / C-346 — Fuel Line and Rocker Arm Removal

Maintenance · Fuel lines and rocker arms

For the Caterpillar C-3406B / C-346, from the Caterpillar service manual.

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Procedure

1. Remove the fuel lines using the special Caterpillar fuel line wrench.
2. Place the fuel lines in the plastic bag from the fuel line protective group.
3. Install the protective caps on the nozzle assemblies and push the plastic plugs into the open fuel lines.
4. Loosen the rocker arm adjusting screw locknuts and remove the rocker arm bolts; save the washers.
5. Remove the entire rocker arm group (3 cyl.).
6. Remove the exhaust valve bridge leveling screws and jam nuts from the Caterpillar exhaust valve bridges.
7. Loosely install the Caterpillar exhaust valve bridge leveling screws and nuts into the Jacobs bridges.

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.

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