NHTSA Campaign Id 89V157000; Date: Sep. 21, 1989
If the retaining nut is improperly torqued, steering wheel can come loose and steering control would be lost and could result in an accident.
1989 Mack Ch Series
Component: Steering:wheel And Handle Bar
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 13
Splined shaft in fixed steering column is too short, causing the hub of the steering wheel to not fully seat in the taper.
Replace steering column.
System:steering column shaft. Vehicle description:trucks.
Date Owners notified by Manufacturer: Sep 13, 1989
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