Service brakes, air: drumRecall 77V-013 · Mack vehicles

MACK TRUCKS, INCORPORATED recall 77V-013 covers 830 Mack vehicles for a service brakes, air: drum problem, reported to NHTSA on January 1, 1977.

Vehicles repairedNo manufacturer report yet

Vehicles affected8302 models

ReportedJan 1, 1977Owner notice date not listed

Complaints since0Same system, after the recall

Source: NHTSA recall 77V013000 and manufacturer quarterly reports. Started by the manufacturer.

What's wrong

The problem

CRACKS MAY BE PRESENT IN THE BRAKE SPIDER. THESE CRACKS COULD EVENTUALLY CAUSE THE BRAKE SPIDER TO FAIL. THIS COULD ALLOW SEPARATION OF THAT PORTION OF THE BRAKE SPIDER THAT RETAINS THE BRAKE CAMSHAFT, THE BRAKE CHAMBER, AND THE BRAKE CHAMBER BRACKET FROM THE FOUNDATION BRAKE ASSEMBLY. BRAKE PULL IN THE DIRECTION OPPOSITE THE AFFECTED WHEEL LOCATION OR WHEEL LOCK-UP ON THE AFFECTED WHEEL COULD OCCUR.

What to do

The fix

THE DEALER WILL INSPECT AND MODIFY THE AFFECTED BRAKE SPIDERS, FREE OF CHARGE.

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: SERVICE BRAKES; FRONT AXLE CAM, BRAKE SPIDER.CONSEQUENCES OF DEFECT: BRAKE DEGRADATION AND WHEEL LOCK-UP COULD CAUSE LOSS OFVEHICLE CONTROL AND AN ACCIDENT.

Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.

2 models

Vehicles in this recall

Mack WL1975, 1976

Mack WS1975, 1976

Built from January 1, 1975 to December 1, 1975. Not every vehicle in these model years is included; check by VIN.