Mack Trucks, Inc.: Safety Recalls in 1977

Updated on March 19, 2026.

There were 8 safety recalls made by Mack Trucks, Inc. in 1977. See the details of the recalls below.

You can also see similar information for other manufacturers.

Data Source: NHTSA.

See this for other years:

November 21, 1977

(Campaign #: NR (Not Reported))

SUSPENSION:TANDEM AXLE:REAR:LEAF SPRING ASSEMBLY:H

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.

NHTSA ID: 77V205000

Component: SUSPENSION

# of Units Affected: 7,400

Consequence Summary:

Corrective Action:

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

Park Outside Advisory: No

Do not Drive Advisory: No

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November 21, 1977

(Campaign #: NR (Not Reported))

INTERIOR SYSTEMS:ACTIVE SEAT AND SHOULDER BELTS AN

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.

NHTSA ID: 77V204000

Component: SEAT BELTS

# of Units Affected: 11

Consequence Summary:

Corrective Action:

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

Park Outside Advisory: No

Do not Drive Advisory: No

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October 12, 1977

(Campaign #: NR (Not Reported))

ENGINE COOLING SYSTEM:FAN

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.

NHTSA ID: 77V173000

Component: ENGINE AND ENGINE COOLING

# of Units Affected: 48,000

Consequence Summary:

Corrective Action:

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

Park Outside Advisory: No

Do not Drive Advisory: No

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October 12, 1977

(Campaign #: NR (Not Reported))

INTERIOR SYSTEMS:RESTRAINT:BELT ANCHOR AND ATTACHM

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.

NHTSA ID: 77V174000

Component: SEAT BELTS

# of Units Affected: 6,591

Consequence Summary:

Corrective Action:

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

Park Outside Advisory: No

Do not Drive Advisory: No

View Full Recall Details

September 19, 1977

(Campaign #: NR (Not Reported))

WHEELS:MULTIPLE:CAP:COVER:HUB

THE FRONT WHEEL ALUMINUM HUBS ON THE INVOLVED VEHICLES MAY BE SUBJECT TO CRACKS WHICH MAY PROGRESS CIRCUMFERENTIALLY AROUND THE BARREL OF THE HUB. THIS COULD LEAD TO A FRACTURE IN THE "BARREL" POSITION OF THE HUB AND COMPLETE HUB FAILURE.

NHTSA ID: 77V149000

Component: WHEELS

# of Units Affected: 250

Consequence Summary:

Corrective Action:

DEALER WILL INSTALL STEEL HUBS IN PLACE OF ALUMINUM HUBS WITHOUT CHARGE TO OWNER.

Park Outside Advisory: No

Do not Drive Advisory: No

View Full Recall Details

June 17, 1977

(Campaign #: NR (Not Reported))

WHEELS:OTHER

THE FRONT WHEEL RIM CLAMP STUDS, INSTALLED ON THE INVOLVED VEHICLES, MAY NOT HAVE BEEN MANUFACTURED CORRECTLY, CAUSING A BRITTLE CONDITION IN THE THREAD ROOT AREA. THE STUDS COULD EVENTUALLY CRACK AND BREAK WHEN WHEEL NUTS ARE TIGHTENED TO SPECIFICATIONS.

NHTSA ID: 77V096000

Component:

# of Units Affected: 825

Consequence Summary:

Corrective Action:

THE DEALER WILL REPLACE ALL SUSPECT FRONT WHEEL STUDS, WITHOUT CHARGE TO OWNER.

Park Outside Advisory: No

Do not Drive Advisory: No

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January 1, 1977

(Campaign #: NR (Not Reported))

BRAKES:AIR:CYLINDER WHEEL:CAM:ACTUATING

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.

NHTSA ID: 77V013000

Component: SERVICE BRAKES, AIR

# of Units Affected: 830

Consequence Summary:

Corrective Action:

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

Park Outside Advisory: No

Do not Drive Advisory: No

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January 1, 1977

(Campaign #: NR (Not Reported))

STEERING:MANUAL:SHAFT LOWER WORM

THE LOWER STEERING SHAFT YOKE CLAMP BOLTS ON THE INVOLVED VEHICLES MAY NOT HAVE BEEN SUFFICIENTLY TIGHTENED. SHOULD THESE BOLTS LOSSEN AND COME OFF, THE LOWER STEERING SHAFT COULD SEPARATE FROM THE STEERING GEAR.

NHTSA ID: 77V011000

Component: STEERING

# of Units Affected: 2,200

Consequence Summary:

Corrective Action:

THE DEALER WILL SECURE THE CLAMP BOLT AND MAKE THE NECESSARY MODIFICATIONS ON THE LOWER STEERING SHAFT, FREE OF CHARGE.

Park Outside Advisory: No

Do not Drive Advisory: No

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