Mack Trucks, Inc.: Safety Recalls in 1978
Updated on March 19, 2026.
There were 12 safety recalls made by Mack Trucks, Inc. in 1978. See the details of the recalls below.
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Data Source: NHTSA.
October 11, 1978
(Campaign #: NR (Not Reported))
ELECTRICAL SYSTEM:WIRING
A SHORT CIRCUIT COULD OCCUR DUE TO CHAFING OR WIRE DISCONNECTION IN THE BOX.
NHTSA ID: 78V222000
Component: ELECTRICAL SYSTEM
# of Units Affected: 161
Consequence Summary:
Corrective Action:
THE WIRING IN THE SLEEPER BOX WILL BE CORRECTED, FREE OF CHARGE.
Park Outside Advisory: No
Do not Drive Advisory: No
October 3, 1978
(Campaign #: NR (Not Reported))
BRAKES:ELECTRICAL WIRING AND CONNECTORS
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".
NHTSA ID: 78V210000
Component: SERVICE BRAKES, AIR
# of Units Affected: 19,370
Consequence Summary:
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.
Park Outside Advisory: No
Do not Drive Advisory: No
August 8, 1978
(Campaign #: NR (Not Reported))
STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM
THE EXISTING CROSS STEERING ARMS MAY HAVE INSUFFICIENT FATIGUE LIFE IN THE NECK AREA. THIS IS NEAR THE BOSS FOR THE CROSS STEERING TUBE BALL JOINT CONNECTION. FAILURE OF EITHER OF THE CROSS STEERING LEVERS COULD LEAD TO LOSS OF STEERING CONTROL OF THE RIGHT FRONT WHEEL.
NHTSA ID: 78V172000
Component: STEERING
# of Units Affected: 13,800
Consequence Summary:
Corrective Action:
THE DEALER WILL INSPECT AND, IF NECESSARY, INSTALL CROSS STEERING ARMS OF IMPROVED DESIGN AND GREATER STRENGTH.
Park Outside Advisory: No
Do not Drive Advisory: No
August 8, 1978
(Campaign #: NR (Not Reported))
STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM
DEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.
NHTSA ID: 78V171000
Component: STEERING
# of Units Affected: 2,100
Consequence Summary:
Corrective Action:
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
Park Outside Advisory: No
Do not Drive Advisory: No
August 8, 1978
(Campaign #: NR (Not Reported))
ENGINE:MOUNTS
THE POSSIBILITY EXISTS THAT THE ALUMINUM ENGINE REAR SUPPORT BRACKETS MAY FAIL DUE TO METAL FATIGUE. THIS TYPE OF FAILURE WOULD ALLOW THE ENGINE AND TRANSMISSION ASSEMBLY TO DISLOCATE DOWNWARD. THIS WILL RESULT IN THROTTLE CONTROL LOSS WITH THE ENGINE OPERATING CONTINUOUSLY IN THE MID TO UPPER RANGE OF THE GOVERNED SPEED RANGE.
NHTSA ID: 78V170000
Component: ENGINE AND ENGINE COOLING
# of Units Affected: 850
Consequence Summary:
Corrective Action:
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE ALUMINUM SUPPORT BRACKETS WITH BRACKETS MADE FROM DUCTILE IRON FOR INCREASED STRENGTH.
Park Outside Advisory: No
Do not Drive Advisory: No
August 7, 1978
(Campaign #: NR (Not Reported))
SUSPENSION:I-BEAM:SOLID:FRONT HANGER:BRACKET
THE ALUMINUM FRONT SPRING BRACKET IS DEFECTIVE IN THAT IT MAY SHEAR AT THE POINT OF FRAME RAIL ATTACHMENT. THIS SHEARING COULD DISLOCATE THE STEERING AXLE.
NHTSA ID: 78V169000
Component: SUSPENSION
# of Units Affected: 1,300
Consequence Summary:
Corrective Action:
THE DEALER WILL INSTALL A NEW IMPROVED FRONT SPRING BRACKET MADE OF DUCTILE IRON, WITHOUT CHARGE TO OWNER.
Park Outside Advisory: No
Do not Drive Advisory: No
April 4, 1978
(Campaign #: NR (Not Reported))
BRAKES:AXLE CONTROLLERS
AN AXLE "NO BRAKE" CONDITION COULD RESULT FROM AN EATON CONTROLLER INTERNAL ELECTRICAL MALFUNCTION. THIS CONDITION MAY CAUSE THE ANTI-WHEEL LOCK VALVE SOLENOID TO BE CONTINUOUSLY ENERGIZED AND PREVENT THE BRAKES FROM BEING APPLIED ON ONE OF THE AXLES. AS A RESULT, THE ANTI-WHEEL LOCK WARNING LAMP IS NOT ACTIVATED.
NHTSA ID: 78V068000
Component: SERVICE BRAKES, AIR
# of Units Affected: 9,700
Consequence Summary:
Corrective Action:
THE DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE ANTI-WHEEL LOCK CONTROLLER WITHOUT CHARGE TO OWNER.
Park Outside Advisory: No
Do not Drive Advisory: No
February 9, 1978
(Campaign #: NR (Not Reported))
EQUIPMENT:OTHER PIECES
THE AIR RESERVOIR ON THE INVOLVED VEHICLES MAY HAVE A DESIGN DEFICIENCY. THE RESERVOIR MAY NOT BE STRONG ENOUGH TO WITHSTAND PRESSURES GENERATED DURING OPERATION.
NHTSA ID: 78V029000
Component:
# of Units Affected: 268
Consequence Summary:
Corrective Action:
THE DEALER WILL REPLACE SUSPECT AIR RESERVOIRS WITHOUT CHARGE TO OWNERS.
Park Outside Advisory: No
Do not Drive Advisory: No
February 9, 1978
(Campaign #: NR (Not Reported))
STEERING:LINKAGES:ARM:PITMAN
THE STEERING PITMAN ARM IS SUBJECT TO FAILURE AT THE AREA OF THE TRANSITION TO THE ARM OFFSET DUE TO HIGH STRESS CONCENTRATIONS.
NHTSA ID: 78V028000
Component: STEERING
# of Units Affected: 100
Consequence Summary:
Corrective Action:
DEALER WILL REPLACE THE STEERING PITMAN ARM, STEERING GEAR OUTPUT SHAFT AND STEERING GEAR MOUNTING BRACKET.
Park Outside Advisory: No
Do not Drive Advisory: No
February 9, 1978
(Campaign #: NR (Not Reported))
ENGINE
THE SYNFLEX-TYPE OIL PRESSURE SIGNAL LINE MAY HAVE BEEN ROUTED TOO CLOSE TO THE EXHAUST MANIFOLD. EXCESSIVE HEAT MAY CAUSE THE LINE TO RUPTURE, AND OIL LEAKAGE MAY OCCUR.
NHTSA ID: 78V032000
Component: ENGINE AND ENGINE COOLING
# of Units Affected: 459
Consequence Summary:
Corrective Action:
THE DEALER WILL REROUTE THE OIL PRESSURE SIGNAL LINE TO ELIMINATE POTENTIAL FIRE HAZARD, WITHOUT CHARGE TO OWNER.
Park Outside Advisory: No
Do not Drive Advisory: No
February 9, 1978
(Campaign #: NR (Not Reported))
SUSPENSION:TANDEM AXLE:REAR:V-BOLT AND ATTACHMENTS
THE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.
NHTSA ID: 78V031000
Component: SUSPENSION
# of Units Affected: 33,000
Consequence Summary:
Corrective Action:
THE DEALER WILL REPLACE THE DEFECTIVE BRACKET WITH A REDESIGNED VERSION.
Park Outside Advisory: No
Do not Drive Advisory: No
February 9, 1978
(Campaign #: NR (Not Reported))
BRAKES:AIR DRYER
A DESIGN DEFICIENCY EXISTS IN THE AIR DRYER PIPING IN THE AREA OF THE PRESSURE RELIEF VALVE AND COMPRESSOR GOVERNOR CONTROL LINK. MOISTURE IS PASSED AND BUILDS UP IN THIS RELIEF VALVE AND CONTROL LINE. IN FREEZING AMBIENT TEMPERATURES, THIS MOISTURE MAY FREEZE, ALLOWING THE CHASSIS AIR SYSTEM PRESSURE TO EXCEED 150 PSI. EXCESSIVE AIR SYSTEM PRESSURE CAN CAUSE SEPARATION OF AIR PIPING CONNECTIONS AND AIR SYSTEM VALVE FAILURE.
NHTSA ID: 78V030000
Component: SERVICE BRAKES, AIR
# of Units Affected: 400
Consequence Summary:
Corrective Action:
THE DEALER WILL RELOCATE THE AIR SYSTEM COMPRESSOR GOVERNOR LINE AND PRESSURE RELIEF VALVE TO ELIMINATE MOISTURE ACCUMULATION.
Park Outside Advisory: No
Do not Drive Advisory: No
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