The defect
INCORRECT MANUFACTURE OF THE HYDROBOOST CYLINDER ALLOWS THE BALL SOCKET CLAMP TO CONTACT RIGHT SIDE STEERING LEVER ON AN EXTREME LEFT TURN AND CAUSE FLEXING OF THE CYLINDER ROD .
The risk
THIS FLEXING CAN CAUSE SEAL FAILURE OR CYLINDER FAILUREOF THE HYDROBOOST UNIT AND RESULT IN LOSS OF STEERING CONTROL AND RESULT IN AVEHICLE ACCIDENT.
The remedy
REPLACE INCORRECTLY BUILT BOOST CYLINDERS.
NHTSA's own wording · initiated by ODI
Vehicles covered
| Model | Model years |
|---|---|
| Mack CF | 1988, 1989 |
Components: STEERING:HYDRAULIC POWER ASSIST SYSTEM
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack CF | 1988 | 0 | 5 |
| Mack CF | 1989 | 0 | 4 |
Other steering recalls in 1991
21 of the 220 recall campaigns reported to NHTSA in 1991 concerned the steering; MACK TRUCKS, INCORPORATED filed 245 campaigns in all.
| 91V210000 3 Dec 1991 | PACCAR, INCORPORATED |
| 91V208000 27 Nov 1991 | NAVISTAR INTL CORP. |
| 91V203000 19 Nov 1991 | VOLVO GM HEAVY TRUCK CORP |
| 91V193000 12 Nov 1991 | SUBARU OF AMERICA, INC. |
| 91V157000 18 Sept 1991 | GENERAL MOTORS CORP. |
| 91V153000 17 Sept 1991 | WINNEBAGO IND., INC. |
| 91V152000 17 Sept 1991 | WINNEBAGO IND., INC. |
| 91V159000 12 Sept 1991 | THOMAS BUILT BUSES, INC. |
NHTSA recalls (public domain) · all recalls of 1991