- Vehicles
- 21,847
- Built between
- Jan 2004 – Jul 2007
- Models
- 7
- Recall type
- Vehicle
- Initiated by
- Manufacturer
- Owners notified
- 9 January 2008
- Repaired
- Not reported
- Unrepaired
- Not reported
Does this affect my vehicle?
This recall covers vehicles built between January 2004 and July 2007. If yours was built outside that window, it is not part of this recall.
- 2005-2007 Mack CHNBuilt January 2004 to July 2007
- 2008 Mack CHUBuilt January 2004 to July 2007
- 2006 Mack CTPBuilt January 2004 to July 2007
- 2004-2008 Mack CVBuilt January 2004 to July 2007
- 2005-2008 Mack CXNBuilt January 2004 to July 2007
- 2008 Mack CXUBuilt January 2004 to July 2007
- 2008 Mack GUBuilt January 2004 to July 2007
What the defect is
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.
What could happen
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.
What gets fixed
MACK IS WORKING WITH BENDIX TO REPLACE THE PARKER SINGLE CHECK VALVE. THE RECALL BEGAN ON JANUARY 9, 2008.
Timeline
- Vehicles builtJanuary 2004 to July 2007
- Recall reported to NHTSA15 August 2007
- Owners notified9 January 2008
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 15 August 2007.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Manufacturer contact
Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.
Official source
- Manufacturer's recall number
- SC0334
- Recalling manufacturer
- MACK TRUCKS, INC
- Recall initiated by
- MFR
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
Mack recall no. SC0334 (SC0327).CUSTOMERS may contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (tty: 1-800-424-9153); or go to http://www.safercar.gov.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.