The Crewson MK42700S is an automatic slack adjuster with a 1.5-inch by 28-spline camshaft bore, an AL5.5 arm length, and a 5/8-18 external clevis thread. It fits heavy-duty air brake systems on truck and trailer axles where that camshaft and clevis spec is required. This part is sold under part number MK42700S and also cross-references as FS-MK42100SE and FSMK42100SE, among others. Hendrickson lists it as MK42700S in their suspension and brake hardware catalog. Pick up the phone and call Pro Gear and Transmission to confirm the correct fit for your axle before ordering.
Features
1.5-inch camshaft bore diameter with 28-spline interface
AL5.5 arm length designation
5/8-18 external clevis thread
Automatic slack adjuster for heavy-duty air brake systems
Cross-references: FS-MK42100SE, FSMK42100SE, and additional fleet cross numbers
Sold as a single unit (each)
Tech Specs
- Camshaft Bore: 1.5 inch
- Spline Count: 28
- Arm Length: AL5.5
- Clevis Thread: 5/8-18 external
- Unit of Measure: Each
- Cross References: FS-MK42100SE or FSMK42100SE, MK42700S, SBRMK42700S, STEMK42700S, STMMK42700S, STNMK42700S, TWDMK42700S
