Oshkosh Recall 91V187000: Service Brakes, Hydraulic, Foundation Components, Drum

NHTSA recall 91V187000 · announced October 27, 1991 · filed by Oshkosh Truck Corporation · 130 units affected

The problem

THESE VEHICLES HAVE FRONT AXLES WITH BRAKE CAM OPERATION OPPOSITE TO THE ROTATION OF THE BRAKE DRUM (CAM OPPOSITE), AND THERE IS A TENDENCY FOR BRAKES TO CHATTER UNDER LOW AIR PRESSURE, RESULTING IN VIBRATIONS. THE VIBRATIONS INDUCE STRESSES IN THE TIE ROD END BEYOND ITS ENDURANCE LIMIT, AND RESULT IN CRACKS IN THE THREADED PORTION OF THE STUD WHERE THE TUBE ENDS.

The risk

CRACKS IN THE TIE ROD CAN RESULT IN SEPARATION OF THETIE ROD AND LOSS OF VEHICLE CONTROL WITHOUT PRIOR WARNING.

What to do

REPLACE THE CAM OPPOSITE BRAKE ACTUATION WITH CAM SAME BRAKE OPERATION, BY INTERCHANGING THE LEFT AND RIGHT CAM ASSEMBLIES TO AVOID BRAKE CHATTERING; AND REPLACE TIE RODS.

Official NHTSA recall notice →

Notes

SYSTEM: BRAKES AND FRONT SUSPENSION.VEHICLE DESCRIPTION: HEAVY TRUCKS WITH 18000 LBS. DRIVING FRONT AXLES.

Vehicles covered by this recall

• 1985 Oshkosh F
• 1986 Oshkosh F
• 1987 Oshkosh F
• 1988 Oshkosh F
• 1989 Oshkosh F
• 1990 Oshkosh F
• 1991 Oshkosh F
• 1985 Oshkosh P
• 1986 Oshkosh P
• 1987 Oshkosh P
• 1988 Oshkosh P
• 1989 Oshkosh P
• 1990 Oshkosh P
• 1991 Oshkosh P

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.