Mack Recall 78V170000: Engine And Engine Cooling, Engine

NHTSA recall 78V170000 · announced August 8, 1978 · filed by Mack Trucks, Incorporated · 850 units affected

The problem

THE POSSIBILITY EXISTS THAT THE ALUMINUM ENGINE REAR SUPPORT BRACKETS MAY FAIL DUE TO METAL FATIGUE. THIS TYPE OF FAILURE WOULD ALLOW THE ENGINE AND TRANSMISSION ASSEMBLY TO DISLOCATE DOWNWARD. THIS WILL RESULT IN THROTTLE CONTROL LOSS WITH THE ENGINE OPERATING CONTINUOUSLY IN THE MID TO UPPER RANGE OF THE GOVERNED SPEED RANGE.

What to do

DEALER WILL INSPECT AND, IF NECESSARY, REPLACE ALUMINUM SUPPORT BRACKETS WITH BRACKETS MADE FROM DUCTILE IRON FOR INCREASED STRENGTH.

Official NHTSA recall notice →

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: ENGINE; ENGINE MOUNTING BRACKET.CONSEQUENCES OF DEFECT: LOSS OF THROTTLE CONTROL MAY RESULT IN LOSS OF VEHICLECONTROL AND AN ACCIDENT.

Vehicles covered by this recall

• 1975 Mack Rwl
• 1976 Mack Rwl
• 1977 Mack Rwl
• 1978 Mack Rwl
• 1975 Mack Rws
• 1976 Mack Rws
• 1977 Mack Rws
• 1978 Mack Rws
• 1975 Mack Wl
• 1976 Mack Wl
• 1977 Mack Wl
• 1978 Mack Wl
• 1975 Mack Ws
• 1976 Mack Ws
• 1977 Mack Ws
• 1978 Mack Ws

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