Caterpillar — Electric Brake Adjustment
Maintenance · 121/4" electric brakes
From a Caterpillar owner's manual — check it applies to your exact model before use.
Browse Caterpillar generators & specs →
Before you start
- Do not lift or support the trailer on any part of the axle or suspension system.
- Never go under any trailer unless properly supported on rated jack stands.
Procedure
- Jack up trailer, secure on adequate capacity jack stands; wheel and drum must rotate freely.
- Remove the adjusting hole cover from the adjusting slot on the backing plate bottom.
- Rotate the starwheel to expand brake shoes until wheel is very difficult to turn.
- Rotate the starwheel opposite direction until wheel turns freely with slight lining drag.
- Replace the adjusting hole cover and lower the wheel to the ground.
- Repeat on all brakes; set all brakes to the same clearance.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Adjust after first 200 miles, at 3,000 mile intervals, or as use requires
Source: Caterpillar owner's 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.