Mack F, MB, R, U (1971-1974): Steering
Recall 78V171000 · Aug 8, 1978 · Mack Trucks, Incorporated
2,100
vehicles affected
2,100
vehicles affected
Facts
- Recall number
- 78V171000
- Date
- Aug 8, 1978
- Maker
- Mack Trucks, Incorporated
- Units affected
- 2,100
- Kind
- Vehicles
- Component
- Steering > Linkages > Knuckle > Spindle > Arm
- Model years
- 1971-1974
- Started by
- The maker
- Hazard
- Crash risk
What is wrong
DEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.
The fix
Recall repairs are free of charge.
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
Vehicles covered
4 models, 16 model years in all
Related pages
Questions and answers
Which vehicles are in recall 78V171000?
4 models: Mack F (1971-1974), Mack MB (1971-1974), Mack R (1971-1974) and 1 more, about 2,100 vehicles in all.
What is the fix for recall 78V171000?
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
A recall means the maker found a safety problem and offers a free fix; it does not mean every unit has the problem. Units affected are as reported by the company. Popular models sell more and so have more recalls and complaints. Official public data; texts are shortened. A dealer can tell whether a single vehicle still needs the repair.