Product Description
Automann 139.2831 - Meritor Type Slack Adjuster 5.5"
The Automann 139.2831 Slack Adjuster is an automatic, Meritor-style unit designed for a wide range of steer, drive, and trailer axles. With a 1-1/2" 28-spline input and a 5.5" arm length, this unhanded slack adjuster includes a 5/8"-18 clevis kit and is ideal for heavy-duty brake systems requiring consistent, self-adjusting performance.
Key Features
- Automatic slack adjuster – Meritor type
- Unhanded design for left or right installation
- 1-1/2" diameter with 28-spline input shaft
- 5.5" arm length for standard brake spacing
- Includes 179.YK5005 clevis kit (5/8"-18 thread)
- Fleet Standard product level
Specifications
- Brand: Automann
- Part Number: 139.2831
- UPC: 889626015274
- Slack Type: Automatic – Meritor Type
- Spline Count: 28
- Spline Diameter: 1-1/2"
- Arm Length: 5-1/2"
- Weight: 7.0 lbs
- Shipping Dimensions: 11.25 x 5.875 x 2.375 in
Kit Contents
- (1) Slack Adjuster – 139.2831
- (1) Clevis Kit – 179.YK5005 (5/8"-18 thread)
Applications
Fits Dana/Spicer, Hendrickson trailer, and Meritor axles with 16.5" drum brakes across multiple FMSI types (4515E, 4707, 4718, 4720, etc.). Used in ProStar, Cascadia, and other vocational or highway tractors and trailers.
Cross References
- Euclid: E11401, E11401A
- Meritor: R801073, R801072, R801070, R802462, R803110
- Meritor: A283275H1152S, A323275H1152, A413275Z1144
- Ford: 4C4Z2041DA
- IHC: 2018227C91
- Thomasbilt: 61130976, TBB61130976
- Volvo: 3947646, 8086517
Additional Info
- Common across steer and drive axle brake systems
- Used in Hendrickson HXS, Meritor Q, Q Plus, and P Series brakes
- OEM form and function matched for reliable adjustment
- Visit Automann Website
