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Pro-Par · Brakes & Wheel End
PROSA1140
In stock · ships from Knoxville
The PROSA1140 is an automatic slack adjuster for heavy-duty truck and trailer air brake systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 4 applications
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All confirmed applications for this part number.
Other applications
Other applications
Listed for steer and drive axles. Also fits many other heavy-duty trucks and tractors when the camshaft diameter, spline count, and arm length match. Always confirm arm span and clevis type before replacing.
Part data verified against 4 catalog sources
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It mounts on the camshaft and automatically compensates for brake lining wear, keeping the brake shoes correctly spaced from the drum so stopping power stays consistent. This model has a 1.50-inch diameter, 28-spline hub, a 5.5-inch straight arm, and includes a collar lock clevis; it is intended for steer and drive axle positions. Replace a worn or seized slack adjuster to maintain proper brake adjustment and meet safety requirements.
Part Number: PROSA1140
SLACK ADJUSTER 1.50-28 SPL AUTO 5.5 STRAIGHT GUN
Vendor: Aurora
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
