Vehicle recall 70V034000 · April 8, 1970
Mack DM807, DM809 and 1 more model
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Notes
- 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.)
Recall details
- NHTSA campaign
- 70V034000
- Reported to NHTSA
- April 8, 1970
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- April 1, 1970
- Vehicles potentially affected
- 247
- Initiated by
- the manufacturer
- Components
- Steering › Hydraulic power assist › Pump
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack DM807 (model year not listed)
- Mack DM809 (model year not listed)
- Mack DM811 (model year not listed)
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.