- Vehicles
- 48,000
- Built between
- Not published
- Models
- 14
- Recall type
- Vehicle
- Initiated by
- NHTSA investigation
- Owners notified
- 23 March 1978
- Repaired
- Not reported
- Unrepaired
- Not reported
Does this affect my vehicle?
The manufacturer did not publish a build-date range for this recall, so the model and year list below is the only way to tell whether your vehicle is covered.
- 1972-1977 Mack CF
- 1972-1977 Mack DM
- 1972-1977 Mack DMM
- 1972-1977 Mack F
- 1972-1977 Mack FL
- 1972-1977 Mack FS
- 1972-1977 Mack HMM
- 1972-1977 Mack R
- 1972-1977 Mack RD
- 1972-1977 Mack RL
- 1972-1977 Mack RM
- 1972-1977 Mack U
- 1972-1977 Mack WL
- 1972-1977 Mack WS
What the defect is
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.
What gets fixed
DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.
Timeline
- Recall reported to NHTSA12 October 1977
- Owners notified23 March 1978
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 12 October 1977.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Official source
- Recalling manufacturer
- MACK TRUCKS, INCORPORATED
- Recall initiated by
- ODI
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
Vehicle description: trucks equipped with six-cylinder engines.system: engine cooling; fan.consequences of defect: broken pieces can be propelled outside of the fanshroud and will present an immediate danger and possible injury to personsstanding nearby.note: prior to correction, vehicle should not be serviced with the hood raisedand the engine running.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.