Vehicle recall 11V272000 · May 3, 2011
Mack LEU, MRU and 4 more models
Due to an incomplete "knitting" of the iron at the time of casting, inadequate structural integrity of the slack adjuster housing can occur, which could cause the housing to…
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Mack trucks is recalling certain model year 2011-2012 chu, cxu, gu, leu and mru trucks manufactured from October 15, 2010, through January 31, 2011, and equipped with gunite automatic slack adjusters. Due to an incomplete "knitting" of the iron at the time of casting, inadequate structural integrity of the slack adjuster housing can occur, which could cause the housing to break at the handle under normal operating loads.
- Consequence
- Slack adjusters with this flow notch could crack under normal braking conditions causing loss of braking which could result in a vehicle crash.
- Remedy
- Mack trucks will notify owners and dealers will replace the subject slack adjusters free of charge. The safety recall began on August 24, 2011. Owners may contact mack trucks at 1-800-528-6586.
- Notes
- Owners may also contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to http://www.safercar.gov.
Recall details
- NHTSA campaign
- 11V272000
- Reported to NHTSA
- May 3, 2011
- Filed by
- MACK TRUCKS, INC
- Manufacturer campaign
- SC0352
- Owner notification
- August 12, 2011
- Vehicles potentially affected
- 1,524
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Slack adjusters › Automatic
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.