The defect
AIR BRAKE SYSTEM WAS MODIFIED BY ADDING A LONGER AIR LINE BETWEEN THE ABS SOLENOID AND THE TRANSFER TEE TO SIMPLIFY MANUFACTURING. THIS MODIFICATION CAUSED THE TRUCKS TO BE IN NON-COMPLIANCE WITH FMVSS 121, BRAKE TIMING TEST.
The risk
THE MISTIMED BRAKE AND ABS SYSTEM MAY CAUSE THE TRUCK TOFAIL THE STOPPING DISTANCE REQUIREMENT OF THE FMVSS, WHICH MAY LEAD TO ANACCIDENT.
The remedy
REMOVE THE EXTRA LENGTH OF AIR LINE AND INSTALL THE TRANSFER TEE AT THE ABS SOLENOID.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Kenworth K100E | 1990, 1991 |
| Kenworth T400 | 1990, 1991 |
| Kenworth T600 | 1990, 1991 |
| Kenworth T800 | 1990, 1991 |
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 K100E | 1990 | 0 | 2 |
| Kenworth K100E | 1991 | 0 | 1 |
| Kenworth T400 | 1990 | 0 | 3 |
| Kenworth T400 | 1991 | 0 | 2 |
| Kenworth T600 | 1990 | 1 | 2 |
| Kenworth T600 | 1991 | 0 | 3 |
| Kenworth T800 | 1990 | 0 | 3 |
| Kenworth T800 | 1991 | 0 | 4 |
Other service brakes, air recalls in 1991
8 of the 220 recall campaigns reported to NHTSA in 1991 concerned the service brakes, air; PACCAR, INCORPORATED filed 199 campaigns in all.
| 91V218000 16 Dec 1991 | BLUE BIRD BODY COMPANY |
| 91V205000 22 Nov 1991 | VOLVO GM HEAVY TRUCK CORP |
| 91V197000 12 Nov 1991 | VOLVO GM HEAVY TRUCK CORP |
| 91V194000 4 Nov 1991 | OSHKOSH TRUCK CORPORATION |
| 91V178000 15 Oct 1991 | FREIGHTLINER CORPORATION |
| 91V171000 4 Oct 1991 | EOS COACH |
| 91V125000 24 Jul 1991 | LABRIE EQUIPMENT LTD. |
NHTSA recalls (public domain) · all recalls of 1991