Caterpillar C-3406B / C-346 — Extraction of Dowel Pin
Repair & overhaul · Rocker arm group dowel pin
For the Caterpillar C-3406B / C-346, from the Caterpillar service manual.
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Procedure
- Identify the front (fan end) of the rocker arm groups.
- Tightly clamp the Jacobs special Dowel Pin Extractor on the front locating pin of the rocker group at cylinder No. 1.
- Carefully extract the dowel pin by tightening the two capscrews in small equal increments (1/4 turn each).
- Lubricate the end of the Jacobs oil supply adapter with clean engine oil and install it in place of the Caterpillar dowel pin.
- Align the pin holes in the pedestal and the rocker arm shaft; do not install the O ring at this time.
Tools required
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.