1977 MACK WS RECALL - #78V210000
RECALL FOR SERVICE BRAKES, AIR : ANTILOCK : INTERCONNECTING ASSEMBLY(WIRING)
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".
Information provided by the National Highway Traffic Safety Administration.
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| Vehicle |
1977 MACK WS |
|
| Manufacturer |
MACK TRUCKS, INCORPORATED |
| Manufactured between |
10/1/1977 - 9/1/1978 |
| Recalled on |
10/12/1979 |
| Influenced by |
MACK TRUCKS, INCORPORATED |
| Owners Notified on |
11/7/1978 |
| # Affected |
19,370 |
| Recalled for |
SERVICE BRAKES, AIR:ANTILOCK:INTERCONNECTING ASSEMBLY(WIRING) |
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| Description |
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". |
| Consequences |
|
| Corrective action |
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. |
| Notes |
VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SERVICE BRAKES; ELECTRICAL WIRING AND CONNECTORS.CONSEQUENCES OF DEFECT: THIS DELAY IN EFFECTIVE BRAKING ACTION COULD LEAD TO ANACCIDENT UNDER CERTAIN TRAFFIC CONDITIONS. |
| See also |
1977 MACK WS Recall for WHEELS, MULTI PIECE
1977 MACK WS Recall for ENGINE AND ENGINE COOLING, COOLING SYSTEM, FAN
1977 MACK WS Recall for SUSPENSION, REAR, SPRINGS, LEAF SPRING ASSEMBLY, HANGER/BRACKET
1977 MACK WS Recall for SERVICE BRAKES, AIR, SUPPLY, HOSES, LINES/PIPING, AND FITTINGS
1977 MACK WS Recall for ENGINE AND ENGINE COOLING, ENGINE
1977 MACK WS Recall for ENGINE AND ENGINE COOLING, ENGINE
1977 MACK WS Recall for STEERING, LINKAGES
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