Slack Adjuster - Automatic | Meritor R801073 | FleetRun FR-BRKE558


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Part Number

  • FleetRun: FR-BRKE558

Cross Reference Part Number

  • Meritor: R801073 / R803110 (w/o clevis)
  • Haldex: CS56040
  • Gunite: AS1140 / AS1040
  • Volvo/Mack: 20527307 / 3947646
  • Euclid: E11401
  • Dayton: 05-654 / 05-363
  • Automann: 139.2831
  • Bendix: K043197
  • Sirco: SA1073
  • Stemco: MK42100S


  • Brake Camshaft / S-Cam Spline Diameter: 1.50 in.
  • Spline / Teeth Quantity: 28
  • Arm Length ~ From Center Of Spline Diameter To Upper & Lower Clevis Pins: 5.50 in.
  • Meritor Style
  • Stroke Sensing
  • Non Quick-Connect Clevis
  • Collar Lock Clevis
  • Complete With Straight Clevis
  • Drilled Worm Wheel
  • Factory Lubricated & Sealed Along With Heavy Duty Internals
  • Long Stroke Compatible
  • Made From The Finest Quality Ductile Nodular Iron

Please note: this is an aftermarket part, the use of other manufacturer's names, part numbers or trademarks is for informational purposes only.

Please verify OEM part numbers before purchasing, FleetRun assumes no liability related to product use and fitment.

Automatic Brake Slack Adjuster | Meritor R801073

Looking for a reliable Automatic Slack Adjuster for your brake system? Look no further than FleetRun's FR-BRKE558, a high-quality replacement part that meets or exceeds OEM standards.

This Haldex-style slack adjuster is factory lubricated and sealed, and features heavy-duty internals for long-lasting performance. With a drilled worm wheel and 1.50-inch brake camshaft spline diameter, this adjuster is designed to work with a range of brake systems on semi trucks, commercial vehicles, and trailers from top brands like Volvo, Freightliner, Kenworth, and Peterbilt.

The FR-BRKE558 also boasts a long-stroke design and is made from the finest quality ductile nodular iron, ensuring durability and reliability on the road.

For troubleshooting tips and other helpful information, be sure to visit our Shop Talk page. Don't settle for subpar slack adjusters - upgrade to the FR-BRKE558 from FleetRun today and enjoy peace of mind on the road.

  • 013-002-028

  • For other information such as tips and tricks or troubleshooting from technicians and shops visit our Shop Talk page from our menu
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