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Home›Repair guides›Slave Piston Removal and Spring Compression

Caterpillar — Slave Piston Removal and Spring Compression

A Caterpillar service procedure — check it applies to your exact model before use.

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Before you start

  • Wear safety glasses and remove slave piston carefully
  • The slave piston is retained by springs under heavy compression. If proper instructions are not followed, springs will discharge with enough force to cause personal injury

Procedure

  1. Remove the locknut on the slave piston adjusting screw.
  2. Back out the adjusting screw until the slave piston is fully retracted (screw is loose).
  3. Place the hole in the clamp fixture over the slave piston adjusting screw.
  4. While holding the fixture in position, screw holder down over the slave piston until the spring retainer is contacted.
  5. Turn the handle slowly until the retainer is depressed to about 1/32 in. (1mm), relieving pressure against the retaining ring.
  6. Remove the retaining ring using retaining ring pliers.
  7. Back out the holder until the springs are loose.
  8. Remove the fixture and all components ensuring there is no binding or burrs.

Tools required

  • Clamp fixture
  • Retaining ring pliers

Source: manual:015851D.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.