| Make : MACK | Model : DM | Year : 1977 |
| Build Dates : 19771001 - 19780901 | ||
| NHTSA Campaign ID Number : 78V210000 | ||
| Date Owners Notified: 19781107 | Date Received by ODI: 19781003 | Date Added to Database: 19791012 |
| Manufacturer(s) Involved: MACK TRUCKS, INCORPORATED | ||
| Manufacturer(s) Responsible for the Recall: MACK TRUCKS, INC | ||
| Manufacturer Campaign Number: | ||
| Component: SERVICE BRAKES, AIR:ANTILOCK:INTERCONNECTING ASSEMBLY(WIRING) | ||
| Potential Number of Units Affected: 19370 | ||
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Summary of the Safety Concern:
DELAYS OF UP TO ABOUT 2 SECONDS MAY EXIST IN THE BRAKE APPLICATION TIMES TO THE BRAKES ON THE BOGIE AXLES IN THE PRESENCE OF CERTAIN TYPES OF WHEEL SPEED SENSOR SIGNAL DISCONTINUITIES OR DISTORTIONS THAT MAY OCCUR AS A RESULT OF SENSOR WIRE FAILURE. THIS CONSTITUTES A NON-COMPLIANCE TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS". |
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Consequence:
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Remedy:
DEALER WILL INSTALL NEW WHEEL SPEED SENSORS THAT INCORPORATE IMPROVED WIRING AND THE PRESENT BOGIE ANTI-WHEEL LOCK SYSTEM WILL BE CHANGED TO AN AXLE-TO-AXLE SYSTEM FOR IMPROVED RELIABILITY. |
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| Report Initiator: MFR | Vehicles Report | |
| Regulation Part Number: 571 | Federal Motor Vehicle Safety Standard Number: 121 | |
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Notes:
CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236). |
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