Engine and engine cooling: cooling system: fan
- Component
- Engine and engine cooling: cooling system: fan
- Manufacturer
- MACK TRUCKS, INCORPORATED
- Vehicles affected
- 48,000
- Reported to NHTSA
- 1977-10-12
- Owners notified
- 1978-03-23
Defect description
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.
Manufacturer remedy
DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.