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Stemco · Brakes & Wheel End
MK22103S
In stock · ships from Knoxville
The Stemco MK22103S is an automatic slack adjuster for heavy-duty air brake systems.
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All confirmed applications for this part number.
Other applications
Other applications
This automatic slack adjuster fits a wide range of heavy-duty applications; always verify camshaft size and spline count before installation.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 10 of 10.
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It uses a clearance-sensing mechanism to automatically maintain the proper gap between the brake lining and drum, so you get consistent stopping power without manual adjustments. This model fits 1.5-inch diameter, 28-spline camshafts and has two mounting holes for 5-inch and 6-inch arm lengths, making it versatile across different axle and chamber setups. It's built with high-carbon steel internal gears and a blue powder-coated finish for corrosion protection, and it does not include the Auto‑Check wear indicator.
Part Number: MK22103S
AUTO SLACK STEMCO
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
