NHTSA Campaign 77V173000
ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
Issued by MACK TRUCKS, INCORPORATED · Reported Oct 12, 1977 · 48,000 vehicles affected
What's wrong
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.
Vehicles affected by this recall
| Make | Model | Year | Units |
|---|---|---|---|
| MACK | CF | 1972 | 48,000 |
| MACK | CF | 1973 | 48,000 |
| MACK | CF | 1974 | 48,000 |
| MACK | CF | 1975 | 48,000 |
| MACK | CF | 1976 | 48,000 |
| MACK | CF | 1977 | 48,000 |
| MACK | DM | 1972 | 48,000 |
| MACK | DM | 1973 | 48,000 |
| MACK | DM | 1974 | 48,000 |
| MACK | DM | 1975 | 48,000 |
| MACK | DM | 1976 | 48,000 |
| MACK | DM | 1977 | 48,000 |
| MACK | DMM | 1972 | 48,000 |
| MACK | DMM | 1973 | 48,000 |
| MACK | DMM | 1974 | 48,000 |
| MACK | DMM | 1975 | 48,000 |
| MACK | DMM | 1976 | 48,000 |
| MACK | DMM | 1977 | 48,000 |
| MACK | F | 1972 | 48,000 |
| MACK | F | 1973 | 48,000 |
| MACK | F | 1974 | 48,000 |
| MACK | F | 1975 | 48,000 |
| MACK | F | 1976 | 48,000 |
| MACK | F | 1977 | 48,000 |
| MACK | FL | 1972 | 48,000 |
| MACK | FL | 1973 | 48,000 |
| MACK | FL | 1974 | 48,000 |
| MACK | FL | 1975 | 48,000 |
| MACK | FL | 1976 | 48,000 |
| MACK | FL | 1977 | 48,000 |
| MACK | FS | 1972 | 48,000 |
| MACK | FS | 1973 | 48,000 |
| MACK | FS | 1974 | 48,000 |
| MACK | FS | 1975 | 48,000 |
| MACK | FS | 1976 | 48,000 |
| MACK | FS | 1977 | 48,000 |
| MACK | HMM | 1972 | 48,000 |
| MACK | HMM | 1973 | 48,000 |
| MACK | HMM | 1974 | 48,000 |
| MACK | HMM | 1975 | 48,000 |
| MACK | HMM | 1976 | 48,000 |
| MACK | HMM | 1977 | 48,000 |
| MACK | R | 1972 | 48,000 |
| MACK | R | 1973 | 48,000 |
| MACK | R | 1974 | 48,000 |
| MACK | R | 1975 | 48,000 |
| MACK | R | 1976 | 48,000 |
| MACK | R | 1977 | 48,000 |
| MACK | RD | 1972 | 48,000 |
| MACK | RD | 1973 | 48,000 |
| MACK | RD | 1974 | 48,000 |
| MACK | RD | 1975 | 48,000 |
| MACK | RD | 1976 | 48,000 |
| MACK | RD | 1977 | 48,000 |
| MACK | RL | 1972 | 48,000 |
| MACK | RL | 1973 | 48,000 |
| MACK | RL | 1974 | 48,000 |
| MACK | RL | 1975 | 48,000 |
| MACK | RL | 1976 | 48,000 |
| MACK | RL | 1977 | 48,000 |
| MACK | RM | 1972 | 48,000 |
| MACK | RM | 1973 | 48,000 |
| MACK | RM | 1974 | 48,000 |
| MACK | RM | 1975 | 48,000 |
| MACK | RM | 1976 | 48,000 |
| MACK | RM | 1977 | 48,000 |
| MACK | U | 1972 | 48,000 |
| MACK | U | 1973 | 48,000 |
| MACK | U | 1974 | 48,000 |
| MACK | U | 1975 | 48,000 |
| MACK | U | 1976 | 48,000 |
| MACK | U | 1977 | 48,000 |
| MACK | WL | 1972 | 48,000 |
| MACK | WL | 1973 | 48,000 |
| MACK | WL | 1974 | 48,000 |
| MACK | WL | 1975 | 48,000 |
| MACK | WL | 1976 | 48,000 |
| MACK | WL | 1977 | 48,000 |
| MACK | WS | 1972 | 48,000 |
| MACK | WS | 1973 | 48,000 |
| MACK | WS | 1974 | 48,000 |
| MACK | WS | 1975 | 48,000 |
| MACK | WS | 1976 | 48,000 |
| MACK | WS | 1977 | 48,000 |
Source: NHTSA Campaign 77V173000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.