Caterpillar — Adjusting Track Alignment
Adjustments · Front axle spindle and shims
From a Caterpillar service manual covering: Challenger 65, Challenger 70, Challenger 75, Challenger 85, Challenger 95. Check it applies to your exact model before use.
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Before you start
- Do not stack shims unless necessary; never stack more than 2 shims.
- Never separate the spindle from the front axle with a jack while the track is tensioned.
Procedure
- Detension the track using the correct procedure.
- Remove shims and determine the existing shim angles from the table or by measuring thickness.
- Calculate the new shim angle needed from the temperature differentials.
- Install the new shims and reassemble the undercarriage in reverse order, then re-tension the track.
- Recheck alignment by running the machine 10-15 min in gear 10F and checking the temperature differential again.
Tools required
- Camso Shim Kit CST-0400 (early single-piece shims) Amazon
- Camso Shim Kit CST-0500 (split shims) Amazon
- Hydraulic jack Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- New Shim Angle = Current shim angle +/- Change needed in shim angle
- Target temperature differential within 15-20F
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.