Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Meritor · Engine
CS1128L
In stock · ships from Knoxville
This is a left-hand S-camshaft for heavy-duty air drum brakes on semi-trucks and trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Always verify dimensions and spline count against your existing camshaft before ordering. This left-hand camshaft is one of two required per axle (right-hand counterpart available as CS1128R or equivalent). Compatible with 2" O.D. enclosed cam tubes or exposed bushings and seals.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 15 of 15.
Different year, make, or config? Get a confirmation against your truck in under a minute.
The S-shaped head converts rotating motion from the slack adjuster into the linear push that forces the brake shoes against the drum, slowing your vehicle. You typically replace it when the cam head wears down, the splines strip, or the journals become scored, which can cause uneven braking or failure. This particular camshaft is designed for 16.5-inch Hendrickson Intraax/HXS and Meritor Q-style trailer brake systems, and works with both enclosed cam tubes and exposed bushing setups.
Part Number: CS1128L
CAMSHAFT, LH
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more