Vehicle recall 77V013000 · January 1, 1977
Mack WL and WS
Cracks may be present in the brake spider.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Cracks may be present in the brake spider. These cracks could eventually cause the brake spider to fail. This could allow separation of that portion of the brake spider that retains the brake camshaft, the brake chamber, and the brake chamber bracket from the foundation brake assembly. Brake pull in the direction opposite the affected wheel location or wheel lock-up on the affected wheel could occur.
- Remedy
- The dealer will inspect and modify the affected brake spiders, free of charge.
- Notes
- Vehicle description: trucks.system: service brakes; front axle cam, brake spider.consequences of defect: brake degradation and wheel lock-up could cause loss ofvehicle control and an accident.
Recall details
- NHTSA campaign
- 77V013000
- Reported to NHTSA
- January 1, 1977
- Filed by
- MACK TRUCKS, INCORPORATED
- Vehicles potentially affected
- 830
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Drum
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.