Mack Trucks, Inc: Service Brakes, Air › Slack Adjusters › Automatic
Mack Trucks, Inc reported this defect to federal regulators on May 3, 2011 and put the number of vehicles at risk at 1,524. The repair is free for as long as the recall stands.
The defect
MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011-2012 CHU, CXU, GU, LEU AND MRU TRUCKS MANUFACTURED FROM OCTOBER 15, 2010, THROUGH JANUARY 31, 2011, AND EQUIPPED WITH GUNITE AUTOMATIC SLACK ADJUSTERS. DUE TO AN INCOMPLETE "KNITTING" OF THE IRON AT THE TIME OF CASTING, INADEQUATE STRUCTURAL INTEGRITY OF THE SLACK ADJUSTER HOUSING CAN OCCUR, WHICH COULD CAUSE THE HOUSING TO BREAK AT THE HANDLE UNDER NORMAL OPERATING LOADS.
The risk
SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.
The remedy
MACK TRUCKS WILL NOTIFY OWNERS AND DEALERS WILL REPLACE THE SUBJECT SLACK ADJUSTERS FREE OF CHARGE. THE SAFETY RECALL BEGAN ON AUGUST 24, 2011. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.
10 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2012 Mack Granite (gu) | 0 | 13 | 0 | 0 |
| 2012 Mack Leu | 0 | 8 | 0 | 0 |
| 2012 Mack Mru | 0 | 9 | 0 | 0 |
| 2012 Mack Pinnacle (chu) | 0 | 8 | 0 | 0 |
| 2012 Mack Pinnacle (cxu) | 0 | 12 | 0 | 0 |
| 2011 Mack GU | 0 | 5 | 0 | 0 |
| 2011 Mack Leu | 0 | 8 | 0 | 0 |
| 2011 Mack Mru | 0 | 10 | 0 | 0 |
| 2011 Mack Pinnacle (chu) | 0 | 7 | 0 | 0 |
| 2011 Mack Pinnacle (cxu) | 0 | 11 | 0 | 0 |
What this page is, and what to do next
A recall is not an opinion. It is a Part 573 report a manufacturer is required by federal law to file once it decides a defect poses an unreasonable risk to safety, and it commits them to repairing the vehicle at no cost to the owner. The three passages above are the manufacturer’s own wording as published by NHTSA.
This page describes the campaign. It cannot tell you whether one particular car has already been through the shop — that is tracked by VIN, and only the manufacturer knows it. Check yours at nhtsa.gov/recalls or with a franchised dealer, quoting campaign number 11V272000.
Full record for the 2012 Mack Granite (gu) → · Recalls carrying a do-not-drive advisory → · Where this data comes from →