The defect
ON CERTAIN TRUCKS, AN RA529 KING PIN RELEASE AIR VALVE WAS MANUFACTURED WITH THE INTERNAL SPOOL INSTALLED BACKWARDS. THIS RESULTS IN THE AIR OPTION OF THE KING PIN RELEASE SYSTEM BEING INOPERABLE. TO CORRECT THIS SITUATION, THE VEHICLE'S AIR LINES WERE REVERSED RATHER THAN REPLACING THE VALVE.
The risk
WITH THE LINES REVERSED, THE KING PIN CAN BE RELEASED WITHOUT THE DRIVER'S KNOWLEDGE. WHEN THIS OCCURS, THE DRIVER COULD DRIVE AWAY AND THE TRAILER COULD BECOME DISENGAGED, INCREASING THE RISK OF A CRASH.
The remedy
KENWORTH WILL INSPECT THE KING PIN RELEASE SYSTEM AND SUSPECT VALVE. IF ANY VEHICLES HAVE A NONCONFORMING VALVE OR INCORRECT PLUMBING, IT WILL BE REPLACED AND RE-PLUMBED. THE RECALL BEGAN ON NOVEMBER 29, 2006. OWNERS MAY CONTACT KENWORTH AT 1-425-828-5440.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Kenworth T600 | 2006 |
| Kenworth T800 | 2006 |
| Kenworth W900 | 2006 |
Components: TRAILER HITCHES:FIFTH WHEEL ASSEMBLY
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 T600 | 2006 | 1 | 8 |
| Kenworth T800 | 2006 | 4 | 13 |
| Kenworth W900 | 2006 | 1 | 11 |
Other trailer hitches recalls in 2006
8 of the 490 recall campaigns reported to NHTSA in 2006 concerned the trailer hitches; PACCAR INCORPORATED filed 113 campaigns in all.
| 06V452000 30 Nov 2006 | NU WA INDUSTRIES INC. |
| 06V438000 15 Nov 2006 | TRACKER MARINE L.L.C. |
| 06V230000 28 Jun 2006 | KEYSTONE RV COMPANY |
| 06V206000 12 Jun 2006 | GENMAR HOLDINGS, INC. |
| 06V176000 22 May 2006 | VERMEER MANUFACTURING COMPANY |
| 06V056000 24 Feb 2006 | M H EBY, INC. |
| 06V010000 17 Jan 2006 | TRAVIS BODY & TRAILER, INC. |
NHTSA recalls (public domain) · all recalls of 2006