Recall 81V-088: 1979–1980 Mack F Series, 1979–1980 Mack MC Series and 2 more
MACK TRUCKS, INCORPORATED recall for service brakes, air, reported to NHTSA on Jul 8, 1981, covering about 10,000 vehicles.
The problem
The retaining pin for the brake control knob has been misaligned (Off the center line of the valve plunger hole). This causes the knob to be overstressed at the retaining pin hole area causing it to separate from the valve.
The fix
The holes will be retooled to provide correct alignment and plastic knobs will be replaced by knobs of stronger material having metal reinforcements.
Notes
Vehicle description: trucks equipped with brake control knobs.system: service brakes; knob retaining pin.consequences of defect: with the knob broken off, the control valve wouldbecome difficult or impossible to operate. One or a combination of brakeapplications would not be possible and the vehicle could be parked in an unsafecondition. An accident and personal injury could result.
Recall details
| Manufacturer | MACK TRUCKS, INCORPORATED |
|---|---|
| Component | Service Brakes, Air › Controls › Hand Control/Valve |
| Recall started by | the manufacturer |
| NHTSA campaign number | 81V088000 |
Vehicles in this recall
| Vehicle | Model years | |
|---|---|---|
| Mack F Series | 1979, 1980 | All years |
| Mack MC Series | 1979, 1980 | All years |
| Mack R Series | 1979, 1980 | All years |
| Mack U Series | 1979, 1980 | All years |
Not every vehicle of these model years is included. Enter your VIN at nhtsa.gov/recalls ↗ or ask a dealer.
Frequently asked questions
What is recall 81V-088?
The retaining pin for the brake control knob has been misaligned (Off the center line of the valve plunger hole). This causes the knob to be overstressed at the retaining pin hole area causing it to separate from the valve.
How is recall 81V-088 fixed?
The holes will be retooled to provide correct alignment and plastic knobs will be replaced by knobs of stronger material having metal reinforcements.
Is the recall repair free?
Yes. Safety recall repairs are free at authorized dealers. Check whether your vehicle is included with its VIN at nhtsa.gov/recalls.