Mack Trucks, Inc: Service Brakes, Air › Supply › Check Valve
Mack Trucks, Inc reported this defect to federal regulators on Aug 15, 2007 and put the number of vehicles at risk at 21,847. The repair is free for as long as the recall stands.
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.
16 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2008 Mack Chu | 0 | 8 | 0 | 0 |
| 2008 Mack CV | 0 | 3 | 0 | 0 |
| 2008 Mack CXN | 0 | 5 | 0 | 0 |
| 2008 Mack Cxu | 0 | 7 | 0 | 0 |
| 2008 Mack GU | 0 | 9 | 0 | 0 |
| 2007 Mack CHN | 1 | 12 | 0 | 0 |
| 2007 Mack CV | 0 | 8 | 0 | 0 |
| 2007 Mack CXN | 0 | 14 | 0 | 0 |
| 2006 Mack CHN | 0 | 13 | 0 | 0 |
| 2006 Mack CTP | 0 | 4 | 0 | 0 |
| 2006 Mack CV | 0 | 5 | 0 | 0 |
| 2006 Mack CXN | 0 | 13 | 0 | 0 |
| 2005 Mack CHN | 0 | 10 | 0 | 0 |
| 2005 Mack CV | 2 | 4 | 2 | 2 |
| 2005 Mack CXN | 0 | 11 | 0 | 0 |
| 2004 Mack CV | 0 | 6 | 0 | 0 |
What this page is, and what to do next
A recall is not an opinion. It is a Part 573 report a manufacturer is required by federal law to file once it decides a defect poses an unreasonable risk to safety, and it commits them to repairing the vehicle at no cost to the owner. The three passages above are the manufacturer’s own wording as published by NHTSA.
This page describes the campaign. It cannot tell you whether one particular car has already been through the shop — that is tracked by VIN, and only the manufacturer knows it. Check yours at nhtsa.gov/recalls or with a franchised dealer, quoting campaign number 07V361000.
Full record for the 2008 Mack Chu → · Recalls carrying a do-not-drive advisory → · Where this data comes from →