The 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.
The 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.
The 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.
NHTSA's own wording · initiated by MFR
Vehicles covered
| 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 |
Components: SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE
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 CHN | 2005 | 0 | 10 |
| Mack CHN | 2006 | 0 | 13 |
| Mack CHN | 2007 | 1 | 12 |
| Mack CHU | 2008 | 0 | 8 |
| Mack CTP | 2006 | 0 | 4 |
| Mack CV | 2004 | 0 | 6 |
| Mack CV | 2005 | 2 | 4 |
| Mack CV | 2006 | 0 | 5 |
| Mack CV | 2007 | 0 | 8 |
| Mack CV | 2008 | 0 | 3 |
| Mack CXN | 2005 | 0 | 11 |
| Mack CXN | 2006 | 0 | 13 |
| Mack CXN | 2007 | 0 | 14 |
| Mack CXN | 2008 | 0 | 5 |
| Mack CXU | 2008 | 0 | 7 |
| Mack GU | 2008 | 0 | 9 |
Other service brakes, air recalls in 2007
23 of the 587 recall campaigns reported to NHTSA in 2007 concerned the service brakes, air; MACK TRUCKS, INC filed 74 campaigns in all.
| 07V571000 18 Dec 2007 | FREIGHTLINER LLC |
| 07V447000 24 Sept 2007 | INTERNATIONAL TRUCK & ENGINE CORPORATION |
| 07V406000 6 Sept 2007 | GREAT DANE LIMITED PARTNERSHIP |
| 07V392000 30 Aug 2007 | NEWELL COACH CORP. |
| 07V373000 22 Aug 2007 | GENERAL MOTORS CORP. |
| 07V302000 16 Jul 2007 | FREIGHTLINER LLC |
| 07V258000 22 Jun 2007 | BLUE BIRD BODY COMPANY |
| 07V256000 13 Jun 2007 | KALMAR INDUSTRIES CORP |
NHTSA recalls (public domain) · all recalls of 2007