What NHTSA investigated
Summary: recent rockwell defect report identified the following additional concerns:a: insufficient air pressure due to inadequate air compressor capacity;b: air horn plumbed into air system without pressure protection valve;c: brake imbalance caused by proportioning valves which reduce the front pressure. The above identified problems may result in heat checking and cracking of the rear brake drums.
Vehicles covered
| Make | Model | Model years |
|---|---|---|
| Pemberton | PEMBERTON | 1978–1986 |
Source
From NHTSA’s investigation file, rebuilt daily. To report a problem with your own vehicle, go to nhtsa.gov/report-a-safety-problem. All open investigations.