1977 Mack Hmm Recalls

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NHTSA Campaign Number: 77V173000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: March 23rd, 1978

Defect Summary:
THE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.

Corrective Summary:
DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.

Recall Notes:
VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH SIX-CYLINDER ENGINES.SYSTEM: ENGINE COOLING; FAN.CONSEQUENCES OF DEFECT: BROKEN PIECES CAN BE PROPELLED OUTSIDE OF THE FANSHROUD AND WILL PRESENT AN IMMEDIATE DANGER AND POSSIBLE INJURY TO PERSONSSTANDING NEARBY.NOTE: PRIOR TO CORRECTION, VEHICLE SHOULD NOT BE SERVICED WITH THE HOOD RAISEDAND THE ENGINE RUNNING.

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NHTSA Campaign Number: 77V174000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: August 23rd, 1978

Defect Summary:
THE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 209, "SEATBELT ASSEMBLIES". ALTHOUGH THE SEATBELTS IN QUESTION PERFORMED MARGINALLY WITH RESPECT TO THE 5000 LB. LOAD REQUIREMENT, ADDITIONAL TESTING CONFIRMED THAT THE ANCHOR COULD FAIL, ALLOWING EITHER THE ANCHOR TO SLIP OVER THE HOLD-DOWN NUT OR THE ANCHOR TO SEPARATE INTO TWO PIECES.

Corrective Summary:
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE SEAT BELT ASSEMBLIES WITHOUT CHARGE TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: TRUCKS.SYSTEM: INTERIOR; SEAT BELT ANCHORAGE ASSEMBLY.CONSEQUENCES OF DEFECT: IN THE EVENT OF AN ACCIDENT, THESE SEAT BELTS MAY NOTADEQUATELY RESTRAIN PASSENGERS AND SERIOUS INJURIES MAY RESULT.

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NHTSA Campaign Number: 77V205000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: May 1st, 1977
Manufactured End Date: October 1st, 1977
Date of Owner Notification: March 14th, 1978

Defect Summary:
A DEFICIENCY EXISTS IN THE WELDS SECURING THE REAR SPRING INSULATOR BRACKET TO THE AXLE HOUSING. THIS IS DUE TO IMPROPER POSITIONING OF THE WELD, IN RELATIONSHIP TO THE BRACKET AND AXLE HOUSING. FAILURE OF THE WELDS WOULD CAUSE SEPARATION OF THE SPRING INSULATOR BRACKET AND THE AXLE HOUSING, RESULTING IN IMPROPER ALIGNMENT OF THE AFFECTED AXLE.

Corrective Summary:
DEALER WILL REWELD THE INSULATOR SPRING BRACKET AT NO COST TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SUSPENSION; TANDEM AXLE.CONSEQUENCES OF DEFECT: THIS CONDITION COULD CAUSE A LOSS OF VEHICLE CONTROLAND A VEHICLE ACCIDENT.

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NHTSA Campaign Number: 77V204000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: April 14th, 1978

Defect Summary:
THE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NOS. 207, "SEATING SYSTEMS", AND 210, "SEAT BELT ASSEMBLY ANCHORAGES". VEHICLES EQUIPPED WITH VIKING T-BAR SEATS HAVE THE SEAT BELT ANCHORAGE LOCATED UNDER THE SEAT. THE TETHER BELT RUPTURED WHEN SUBJECTED TO THE FORCES REQUIRED IN THE SAFETY TEST.

Corrective Summary:
DEALER WILL RELOCATE THE TETHER BELT FLOOR ANCHORAGE TO CORRECT THE PROBLEM, WITHOUT CHARGE TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: HEAVY TRUCKS EQUIPPED WITH VIKING T-BAR SEATS.SYSTEM: INTERIOR; SEAT & SHOULDER BELT ANCHORAGE.CONSEQUENCES OF DEFECT: IN THE EVENT OF A VEHICLE ACCIDENT, THE SEAT BELT MAYNOT PROVIDE ADEQUATE RESTRAINT TO THE WEARER AND SERIOUS PERSONAL INJURY COULDRESULT.