Investigation PE88068: Vehicles

Status

CLOSED

Opened

Jun 28, 1988

Closed

Nov 7, 1988

Model years

—

Subject

Various brake problems

Component: Service brakes, hydraulic

Summary

Summary: recent rockwell reports identified the following additional concerns: a: insufficient air pressure due to inadequate air compressorcapacity; b: air horn plumbed into air system without pressure protectionvalve; c: brake imbalance caused by brake proportioning valves whichreduce the front brake pressure. The above problems may result in heat checking and cracking of the rear brake drums.

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.