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Haldex S-ABA Self-Setting Automatic Air Brake Slack Adjuster Kit | 40020231


Sale price $49.99 Regular price $55.99
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Description

Optimize your commercial vehicle's braking safety with the genuine Haldex S-ABA Self-Setting Automatic Air Brake Slack Adjuster Kit (40020231). As the industry standard for clearance-sensing brake technology, this S-ABA unit automatically adjusts brake lining‑to‑drum clearance gradually based on real-time wear mechanics. Engineered for heavy-duty drive axle applications, its unique self-setting flexible design allows for error-free installation and arbitrary selection of control arm position without affecting functional reliability. By consistently maintaining a tight, uniform clearance, it significantly lowers the risk of over-adjustment during long downhill descents or heat expansion cycles. [1, 2, 3, 4]
⭐ Key Features & Benefits
  • S-ABA Clearance-Sensing Technology: Automatically measures and adjusts stroke based on lining‑to‑drum distance rather than chamber stroke, completely preventing over-adjustment. [1, 2]
  • Self-Setting Flexible Design: Simplifies fleet maintenance by allowing the control arm to be positioned freely from -16° to +130° for quick, error-free mounting. [1, 2]
  • High-Alloy Steel Gears & Heat-Treated Housing: Built with rugged internal components and fatigue-resistant rolled worm shafts to withstand severe road abuse and extreme vibrations. [1, 2]
  • Centralized Internal Clutch System: Fully sealed internals offer robust defense against environmental contaminants like water, dirt, slush, and corrosive road salt. [1, 2]
  • Eliminates Manual Adjustments: Maximizes fleet uptime and safety ratings while drastically reducing routine manual brake maintenance intervals. [1, 2]
🔧 Uses / Applications
  • Heavy-Duty Commercial Fleets: Ideal direct replacement for standard drive axle air brake configurations across long-haul semi-trucks.
  • Severe-Duty Tractor Applications: Delivers reliable, predictable braking safety for vocational logging, construction dump trucks, and line-haul tractors.
  • Transit & Severe Service Vehicles: Ensures consistent brake response and minimal lining wear under stop-and-go heavy loading patterns.
  • Universal Rig Upgrades: Perfect for fleet managers looking to standardize axle configurations using a highly adaptive automatic slack adjuster (ASA). [1, 2, 3, 4, 5, 6, 7]
📊 Technical Specifications
Specification Detail
Part Type Automatic Brake Slack Adjuster (ASA)
Position Drive Axle / Rear
Part Number 40020231 (Old SKU: 40020231M1D)
Material Heat-Treated Alloy Steel Housing & High-Alloy Gears
Fitment 1.5" Camshaft Profile with 28-Spline Teeth Configuration
Condition Brand New
Installation Direct-Fit Replacement / 5.5" Straight Arm Span / Strap Anchor Bracket
🔄 Cross-Reference / Interchange Table
Manufacturer Equivalent Part Number
OEM (Haldex) 40020231, 400-20231, 409-20019, 409-26019
Automann 135.S2835, 133.2831, 135.2831
Bendix K043197, K097643, K182493
Meritor R806004, R806026, M808005
Alliance Truck Parts ABP N42AS 40020231, ABP-N42AS-40020231
Fleet OEM Part Numbers Freightliner (HDX40020231), Mack (539640020231), Volvo (MID40020231), Navistar (ZZ40020231), Paccar (40020231M1D)
Additional Notes Kit Includes Strap Style Anchor Bracket Assembly (Haldex 42710553). Always replace the slack adjuster and the mounting bracket at the same time to ensure an exact alignment profile. Do not use an impact wrench during adjustment to prevent internal clutch damage.

Disclosure Policy

This product was acquired by Freeman Liquidators from a sale of merchandise subject to a commercial insurance loss. Freeman Liquidators is a secondary seller of products, is not affiliated with or sponsored by the manufacturer of the products and is not a manufacturer authorized seller of the products. Sale of this product by Freeman Liquidators is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser.

All products are NEVER USED but external packaging will have damage. Some items may be placed into other packaging to ensure safe shipping. All items are opened for inspection prior to shipment to ensure the best quality of products. Freeman Liquidators guarantees your satisfaction. If you are not completely satisfied with a purchased product, within 30 days from the date of purchase, return the product in its packaging and Freeman Liquidators will fully refund your money.

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Haldex S-ABA Self-Setting Automatic Air Brake Slack Adjuster Kit | 40020231

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