OFFICIAL NHTSA RECALL
78V170000
Engine And Engine Cooling:engine
Reported Aug 8, 1978 · MACK TRUCKS, INCORPORATED
Summary
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.
Consequence
Not supplied in the source record.
Remedy
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE ALUMINUM SUPPORT BRACKETS WITH BRACKETS MADE FROM DUCTILE IRON FOR INCREASED STRENGTH.
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.
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Vehicle entries in this campaign
This is model-level recall history. It does not confirm whether a particular VIN is affected or has received the repair. Check with NHTSA ↗