The defect
CERTAIN HEAVY DUTY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS." IMPROPER SEATING OF THE CHECK VALVE RETAINER IN THE BRASS FITTING HOUSING HAS OCCURRED. IT IS POSSIBLE FOR THE AIR BRAKE SYSTEM PRESSURE TO PUSH THE CHECK VALVE INTERNAL PARTS INTO THE PRIMARY SYSTEM RESERVOIR AND A VEHICLE OPERATOR WOULD NOT KNOW THAT THIS HAS HAPPENED.
The risk
IN THIS CONDITION, THE VEHICLE WOULD NOT MEET THE EMERGENCY REQUIREMENTS OF THE STANDARD.
The remedy
DEALERS WILL REPLACE THE CHECK VALVE. OWNER NOTIFICATION BEGAN NOVEMBER 26, 2003. OWNERS SHOULD CONTACT MACK AT 1-610-709-3337.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack CH | 2003 |
| Mack CL | 2003 |
| Mack CV | 2003 |
| Mack CX | 2003 |
| Mack DM6 | 2003 |
| Mack DMM | 2003 |
| Mack LE | 2003 |
| Mack MR | 2003 |
| Mack RD6 | 2003 |
| Mack RD8 | 2003 |
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 CH | 2003 | 0 | 7 |
| Mack CL | 2003 | 0 | 2 |
| Mack CV | 2003 | 2 | 5 |
| Mack CX | 2003 | 0 | 10 |
| Mack DM6 | 2003 | 0 | 1 |
| Mack DMM | 2003 | 0 | 1 |
| Mack LE | 2003 | 0 | 4 |
| Mack MR | 2003 | 0 | 4 |
| Mack RD6 | 2003 | 0 | 1 |
| Mack RD8 | 2003 | 0 | 1 |
Other service brakes, air recalls in 2003
79 of the 527 recall campaigns reported to NHTSA in 2003 concerned the service brakes, air; MACK TRUCKS, INCORPORATED filed 245 campaigns in all.
| 03V518000 10 Dec 2003 | WELLCO MANUFACTURING, INC. |
| 03V501000 5 Dec 2003 | FEATHERLITE, INC. |
| 03V498000 4 Dec 2003 | BLUE BIRD BODY COMPANY |
| 03V500000 4 Dec 2003 | FREIGHTLINER LLC |
| 03V441000 4 Nov 2003 | HACKNEY |
| 03V433000 4 Nov 2003 | HYUNDAI TRANSLEAD |
| 03V432000 4 Nov 2003 | STRICK CORPORATION |
| 03V430000 3 Nov 2003 | TRAILMOBILE CORP. |
NHTSA recalls (public domain) · all recalls of 2003