There have been 16 safety recalls for the Mack MB. The most recent recalls are shown below. Table 1 and Table 2 show the historical recalls and the recall statistics by the model year of the Mack MB.
| Recalled Vehicles: 1979 Mack F, 1979 Mack FM, 1979 Mack MB, 1979 Mack MC, 1979 Mack MR, 1979 Mack R, 1979 Mack RL, 1979 Mack RM, 1979 Mack RS, 1979 Mack RWL, 1979 Mack RWS, 1979 Mack WL, 1979 Mack WS |
| Component: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY |
| Recall Summary: The spring seat plate, located between the axle housing and the suspension springs, may deform due to spring bending. As a result, the clamping force in the assembly may be reduced. Loss of clamping force could cause spring failure and the axle will dislocate.... Details of this recall 🔎 |
| Recalled Vehicles: 1978 Mack F, 1978 Mack MB, 1978 Mack R, 1978 Mack RD |
| Component: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:HANGER/BRACKET |
| Recall Summary: The steel brackets on the suspension beam were found to be deficient due to excessive shrinkage and low mechanical properties. Failure of one or both of these brackets could cause a separation of the axle housing from the suspension. ... Details of this recall 🔎 |
| Recalled Vehicles: 1977 Mack DM, 1978 Mack DM, 1977 Mack DMM, 1978 Mack DMM, 1977 Mack F, 1978 Mack F, 1977 Mack MB, 1978 Mack MB, 1977 Mack R, 1978 Mack R, 1977 Mack RD, 1978 Mack RD, 1977 Mack RL, 1978 Mack RL, 1977 Mack RM, 1978 Mack RM, 1977 Mack RS, 1978 Mack RS, 1977 Mack RWL, 1978 Mack RWL, 1977 Mack RWS, 1978 Mack RWS, 1977 Mack U, 1978 Mack U, 1977 Mack WL, 1978 Mack WL, 1977 Mack WS, 1978 Mack WS |
| Component: SERVICE BRAKES, AIR:ANTILOCK:INTERCONNECTING ASSEMBLY(WIRING) |
| Recall Summary: 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.... Details of this recall 🔎 |
| Recalled Vehicles: 1974 Mack CF, 1975 Mack CF, 1976 Mack CF, 1977 Mack CF, 1978 Mack CF, 1974 Mack DM, 1975 Mack DM, 1976 Mack DM, 1977 Mack DM, 1978 Mack DM, 1974 Mack DMM, 1975 Mack DMM, 1976 Mack DMM, 1977 Mack DMM, 1978 Mack DMM, 1974 Mack MB, 1975 Mack MB, 1976 Mack MB, 1977 Mack MB, 1978 Mack MB, 1974 Mack RD, 1975 Mack RD, 1976 Mack RD, 1977 Mack RD, 1978 Mack RD |
| Component: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM |
| Recall Summary: 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. ... Details of this recall 🔎 |
| Recalled Vehicles: 1971 Mack F, 1972 Mack F, 1973 Mack F, 1974 Mack F, 1971 Mack MB, 1972 Mack MB, 1973 Mack MB, 1974 Mack MB, 1971 Mack R, 1972 Mack R, 1973 Mack R, 1974 Mack R, 1971 Mack U, 1972 Mack U, 1973 Mack U, 1974 Mack U |
| Component: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM |
| Recall Summary: 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.... Details of this recall 🔎 |
| Date | Component | Vehicle Affected |
|---|---|---|
| Jul. 12, 1979 | Suspension:rear:springs:leaf Spring Assembly | 1,706 |
| Jan. 12, 1979 | Suspension:rear:springs:leaf Spring Assembly:hanger/bracket | 17 |
| Oct. 3, 1978 | Service Brakes, Air:antilock:interconnecting Assembly(wiring) | 19,370 |
| Aug. 8, 1978 | Steering:linkages:knuckle:spindle:arm | 2,100 |
| Aug. 8, 1978 | Steering:linkages:knuckle:spindle:arm | 13,800 |
| Apr. 4, 1978 | Service Brakes, Air:antilock:control Unit/module | 9,700 |
| Nov. 21, 1977 | Suspension:rear:springs:leaf Spring Assembly:hanger/bracket | 7,400 |
| Jun. 17, 1977 | Wheel | 825 |
| Jan. 13, 1976 | Suspension:rear:springs:leaf Spring Assembly:leaf | 54 |
| Oct. 31, 1975 | Service Brakes, Air:supply:hoses, Lines/piping, And Fittings | 1,200 |
| Jun. 23, 1975 | Suspension:multiple Axle | 414 |
| Aug. 5, 1974 | Steering:linkages:link:drag:connection | 1,776 |
| Jun. 24, 1974 | Structure | 48 |
| Feb. 25, 1974 | Power Train:axle Assembly:banjo Housing | 9,019 |
| Dec. 9, 1971 | Wheels:center Section | 238 |
| Oct. 13, 1971 | Fuel System, Gasoline:carburetor System | 15,002 |
| Model | # Recalls |
|---|---|
| 1979 Mack MB | 1 |
| 1978 Mack MB | 3 |
| 1977 Mack MB | 4 |
| 1976 Mack MB | 2 |
| 1975 Mack MB | 4 |
| 1974 Mack MB | 4 |
| 1973 Mack MB | 3 |
| 1972 Mack MB | 4 |
| 1971 Mack MB | 5 |
| 1970 Mack MB | 3 |
| 1969 Mack MB | 2 |
| 1968 Mack MB | 2 |
| 1967 Mack MB | 2 |
| 1966 Mack MB | 1 |
| 1965 Mack MB | 1 |