Vehicle recall 89V178000 · October 23, 1989
1989 Mack CH
Internal components of the E-12 dual circuit air brake valves may be misassembled so that one of the tapered snap rings is upside down.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Internal components of the E-12 dual circuit air brake valves may be misassembled so that one of the tapered snap rings is upside down.
- Consequence
- The snap ring can come out causing the valve tomalfunction and apply the truck's brake system without warning; this couldresult in loss of control and a crash.
- Remedy
- Replace misassembled valves.
- Notes
- System: air brake valves.vehicle description: trucks
Recall details
- NHTSA campaign
- 89V178000
- Reported to NHTSA
- October 23, 1989
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- November 10, 1989
- Vehicles potentially affected
- 3,652
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Controls › Foot control/valve
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.