The Midland Haldex 40020234 is an S-ABA (automatic brake adjuster) designed for standard drive axle applications. It features a 1-1/2" spline diameter with a 28-spline count, a 6" arm length, and a 34° body angle with zero offset. The arm hole diameter is 1/2". The 45° grease fitting is positioned at 180° for straightforward service access. Internal construction includes high-alloy steel gears, a rolled wormshaft, and a heat-treated housing with a centralized clutch. The clearance-sensing design maintains consistent drum-to-lining distance and reduces the risk of over-adjustment during prolonged braking. Bracket kit 42710553 (strap-style anchor bracket) is sold separately. Call us to confirm proper fit for your specific axle and brake configuration.
The gradual adjustment of the S-ABA lowers the risk of over-adjustment during prolonged braking.
For standard drive axle applications.
Interchanges:
- 21691670
- 3518990
- 40020234M1D
- 409-26023
- 40920023
- HDX40020234
- M808029
- MD40020234
- SA2175
- SIRSA2175
A factory handling fee of $25.00 per unit is added at checkout.
Features
S-ABA automatic slack adjuster for standard drive axle applications
1-1/2" spline diameter, 28-spline count
6" arm length, 34° body angle, zero offset
45° grease fitting located at 180° for easy lubrication access
High-alloy steel gears with rolled wormshaft and heat-treated housing
Centralized clutch design reduces over-adjustment risk during prolonged braking
Tech Specs
- Spline Diameter: 1-1/2"
- Spline Count: 28
- Arm Length: 6"
- Body Angle: 34°
- Offset: 0
- Arm Hole Diameter: 1/2"
- Grease Fitting Location: 180°
- Grease Fitting Type: 45°
- Anchor Bracket Style: Strap
- Bracket Kit: 42710553
- OEM Part Number: 409-26023
Additional Information
The clearance-sensing design maintains a constant and uniform distance between the brake drum and lining.The gradual adjustment of the S-ABA lowers the risk of over-adjustment during prolonged braking.
For standard drive axle applications.
