NHTSA Recall 07V361000: Check valve (service brakes)
MACK TRUCKS, INC reported this safety recall to NHTSA on , covering an estimated 21,847 vehicles. It affects 7 models including the Mack Chn.
| NHTSA campaign | 07V361000 |
|---|---|
| Manufacturer campaign | SC0334 |
| Component | SERVICE BRAKES, AIR › SUPPLY › CHECK VALVE |
| Report received | August 15, 2007 |
| Owner notification | January 9, 2008 |
| Initiated by | Manufacturer |
Defect
On certain trucks equipped with parker single check valves (scv) provided by bendix. The defect exists in the parker scv that connects with the supply port of the sr-7 spring brake modulating valve. After prolonged use of the parker scv, the valve body retainer may become excessively worn and eventually break apart. Pieces of the parker scv can become lodged inside the sr-7 spring brake modulating valve, potentially causing either leakage out of the sr-7 valve or preventing air from properly exhausting from the sr-7 valve.
Safety risk
This condition can cause a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button. These conditions can occur without warning, leading to unintended vehicle rollaway, brake drag, or in the case of loss of primary circuit, inability to modulate the spring brakes.
Remedy
Mack is working with bendix to replace the parker single check valve. The recall began on january 9, 2008. Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.
Notes
Mack recall no. Sc0334 (sc0327).customers may contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (tty: 1-800-424-9153); or go to http://www.safercar.gov.
Vehicles covered by recall 07V361000
| Make and model | Model years |
|---|---|
| Mack Chn | 2005, 2006, 2007 |
| Mack Chu | 2008 |
| Mack Ctp | 2006 |
| Mack Cv | 2004, 2005, 2006, 2007, 2008 |
| Mack Cxn | 2005, 2006, 2007, 2008 |
| Mack Cxu | 2008 |
| Mack Gu | 2008 |
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.