Investigation PE89141: Vehicles

Status

CLOSED

Opened

Jul 3, 1989

Closed

Aug 21, 1989

Model years

—

Subject

Drum brake failure

Component: Service brakes, hydraulic

Summary

Summary:athey published a service bulletin describing a drum to discbrake conversion.a check of the odi data base revealed a complaintpertaining to four units which had experienced severe brake problems,such as blown wheel cylinders, prematurely worn brake shoes, and brokenwheel cylinder push rods.the fleet owner claims the prescribed repairis safety related.the problem warrants further investigation.===

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.