Caterpillar C-3406B / C-346 — Alternate Procedure - Housing Leveling

Adjustments · Brake housing shims

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

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Procedure

1. Install Jacobs mounting washers marked 'A' on the studs.
2. Back out the slave piston adjusting screw until the slave piston is seated in its bore.
3. Carefully install the brake housing, ensuring proper alignment of the oil supply adapter.
4. Install the Jacobs 3/8 inch capscrew and washer into the support bracket; tighten to only 10 lbft (13 N·m).
5. Torque the support bracket bolt to 200 lbft (270 N·m), retorque to 330 lbft (450 N·m).
6. Measure the gap between the housing bottom and the Jacobs washer at all four stud locations with a feeler gauge.
7. Remove the capscrew and remove the brake housing from the engine.
8. Measure the thickness of the Jacobs shim packs; each laminated shim measures 0.003 in (0.08 mm).
9. Separate and remeasure the shim packs with a knife and micrometer; they must be within 0.003 in of the measured gap.
10. Place the measured shim packs on the Jacobs studs, then the Jacobs washers on top.
11. Install the fuel lines as shown on page 13.
12. Install the O ring on the oil supply adapter and place a small amount of grease on the adapter.
13. Reinstall the housing, ensuring the oil supply adapter and O ring are correct and fuel lines clear the housing by 0.125 in minimum.
14. Place Jacobs washers marked 'A' and holddown nuts on the studs and reinstall the 3/8 inch capscrews and washers.
15. Torque holddown nuts to 60 lbft (81.6 N·m), retorque capscrews to 47 lbft (64 N·m) and holddown nuts to 100 lbft (135 N·m).

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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