The defect
CERTAIN TRUCKS FAIL TO COMPLY WITH THE BRAKE TIMING REGULATORY REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS." THE BRAKE VALVE WAS MOVED TO THE OPPOSITE RAIL, INCREASING THE LENGTH OF THE AIR LINE, WHICH IN TURN INCREASED THE WHEELBASE REQUIRING A DUAL RELAY VALVE SYSTEM. THE VEHICLES WERE MANUFACTURED WITH A SINGLE VALVE SYSTEM.
The risk
IF STOPPING DISTANCE WAS LIMITED, A VEHICLE CRASH COULD RESULT.
The remedy
DEALERS WILL CONVERT THE SINGLE RELAY VALVE TO A DUAL RELAY VALVE SYSTEM FREE OF CHARGE. THE RECALL BEGAN ON MAY 21, 2007. OWNERS MAY CONTACT KENWORTH AT 425-828-5440.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Kenworth C500 | 2006, 2007 |
| Kenworth T2000 | 2006, 2007 |
| Kenworth T800 | 2006, 2007 |
| Kenworth W900 | 2006, 2007 |
Components: SERVICE BRAKES, AIR
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Kenworth C500 | 2006 | 1 | 5 |
| Kenworth C500 | 2007 | 1 | 6 |
| Kenworth T2000 | 2006 | 7 | 7 |
| Kenworth T2000 | 2007 | 12 | 11 |
| Kenworth T800 | 2006 | 4 | 13 |
| Kenworth T800 | 2007 | 1 | 20 |
| Kenworth W900 | 2006 | 1 | 11 |
| Kenworth W900 | 2007 | 2 | 16 |
Other service brakes, air recalls in 2007
23 of the 587 recall campaigns reported to NHTSA in 2007 concerned the service brakes, air; PACCAR INCORPORATED filed 113 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. |
| 07V361000 15 Aug 2007 | MACK TRUCKS, INC |
| 07V302000 16 Jul 2007 | FREIGHTLINER LLC |
| 07V258000 22 Jun 2007 | BLUE BIRD BODY COMPANY |
NHTSA recalls (public domain) · all recalls of 2007