Caterpillar — Slave Piston Adjustment Procedure
Adjustments · Slave piston / engine brake housing
From a Caterpillar service manual — check it applies to your exact model before use.
Browse Caterpillar generators & specs →
Procedure
- Perform at any location where the exhaust crosshead is loose to the touch (no pressure from a rocker arm).
- Insert a Pacbrake feeler gauge between the slave piston feet and the crosshead.
- Turn the Paclash adjusting screw down until a slight drag is felt on the feeler gauge.
- Torque the lock-nut to 25 lb.ft. (35 N.m) and re-check the clearance.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- .060 in (3406)
- .080 in (3406B FridayParts $16.28 SinoCMP $69.00 KuduParts $675.00 prior 1991)
- .070 in (3406 B+C 1991 to present)
- .090 in (*460 HP)
- 25 lb.ft. (35 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.