1977 MACK HMM — Problems, Recalls & Safety Data
N/A
Safety Rating
0
Owner Complaints
4
Recalls
0
Service Bulletins
0
Investigations
Overview of the 1977 MACK HMM
The 1977 MACK HMM has received a total of 0 safety complaints filed with the National Highway Traffic Safety Administration (NHTSA). There have been 4 recall campaigns affecting this vehicle, covering issues with SEAT BELTS:FRONT:ANCHORAGE, ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN.
Recalls for the 1977 MACK HMM
NHTSA has recorded 4 recalls for the 1977 MACK HMM, potentially affecting up to 62,002 vehicles.
Recall 77V174000 — SEAT BELTS:FRONT:ANCHORAGE
| 6,591 vehicles affected
Defect: 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.
Remedy: DEALER WILL INSPECT AND, IF NECESSARY, REPLACE SEAT BELT ASSEMBLIES WITHOUT CHARGE TO OWNER.
View full details →Recall 77V204000 — SEAT BELTS:FRONT:ANCHORAGE
| 11 vehicles affected
Defect: 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.
Remedy: DEALER WILL RELOCATE THE TETHER BELT FLOOR ANCHORAGE TO CORRECT THE PROBLEM, WITHOUT CHARGE TO OWNER.
View full details →Recall 77V173000 — ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
| 48,000 vehicles affected
Defect: 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.
Remedy: DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.
View full details →Recall 77V205000 — SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:HANGER/BRACKET
| 7,400 vehicles affected
Defect: 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.
Remedy: DEALER WILL REWELD THE INSULATOR SPRING BRACKET AT NO COST TO OWNER.
View full details →Owner Complaints for the 1977 MACK HMM
No complaints have been filed with NHTSA for the 1977 MACK HMM.
Safety Rating for the 1977 MACK HMM
NHTSA has not yet tested the 1977 MACK HMM in its New Car Assessment Program.
Technical Service Bulletins for the 1977 MACK HMM
No technical service bulletins have been reported for this vehicle.
NHTSA Investigations for the 1977 MACK HMM
There are no NHTSA defect investigations on record for this vehicle.
Other Model Years of the MACK HMM
- 1972 MACK HMM — 0 complaints
- 1973 MACK HMM — 0 complaints
- 1974 MACK HMM — 0 complaints
- 1975 MACK HMM — 0 complaints
- 1976 MACK HMM — 0 complaints
- 1977 MACK HMM (current)
Other MACK Models
- MACK MACK — 35 total complaints
- MACK ANTHEM (AN) — 12 total complaints
- MACK CXU612 — 12 total complaints
- MACK CX613 — 10 total complaints
- MACK GRANITE (GR) — 10 total complaints
- MACK CH600 — 9 total complaints
- MACK GU — 9 total complaints
- MACK RD — 8 total complaints