NHTSA Campaign Id 70V034000; Date: Apr. 8, 1970
9999 Mack DM807; 9999 Mack DM809; 9999 Mack DM811
Component: Steering:hydraulic Power Assist:pump
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 247
Possibility that power steering pump drive on dm models employing rubbercrankshaft vibration dam- per may become disengaged from pulleys during vehicleoperation. This condition will stop power steering pump and interrupt powerassist. (correct by installing double idler pulley. )
Date Owners notified by Manufacturer: Apr 1, 1970
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