Mack U 1978
Model U made in 1978 by Mack got 5 recalls. There were some recalls concerningengine and engine cooling, service brakes, air and steering.
Model 1978
Recalls
| Campaign | Manufacturer | Manufacturing date | Type | # of units affected | Date Owner notified Mfg | Recall Initiated by | Manufacturers of recalled vehicles/products | Report Recieved Date | Record Creation Date | Regulation Part Number | FMVSS Number | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ENGINE AND ENGINE COOLING - ENGINE | ||||||||||||||||
| 79V133000 | MACK TRUCKS, INCORPORATED | from 02/01/1977 to 03/01/1979 | V (Vehicle) | 23000 | 11/02/1979 | ODI | MACK TRUCKS, INC | 05/31/1979 | 10/12/1979 | |||||||
| Defect Summary | In the event of turbocharger compressor wheel failure, one or more of the four capscrews that hold the turbocharger together may be struck by parts of the compressor wheel, resulting in the capscrews being damaged. if these capscrews are damaged to the point that they allow the compressor back plate to dislocate from the turbocharger bearing housing, engine lubricating oil may be allowed to escape under pressure, contacting the engine exhaust manifold sections or turbocharger turbine housing. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | Dealer will install a shield for the heads of the four capscrews, along with stronger sae 8 grade 8 capscrews, if necessary, at no cost to owner. | |||||||||||||||
| Notes | Vehicle description: trucks equipped with endt (b) 676, etaz (b) 673a, and etay(b) 673a engines.system: engine and engine cooling.consequences of defect: engine lubricating oil, in the presence of a source ofignition, could lead to an engine compartment fire and serious injury tovehicle passengers. | |||||||||||||||
| SERVICE BRAKES, AIR - ANTILOCK - INTERCONNECTING ASSEMBLY(WIRING) | ||||||||||||||||
| 78V210000 | MACK TRUCKS, INCORPORATED | from 10/01/1977 to 09/01/1978 | V (Vehicle) | 19370 | 11/07/1978 | MFR | MACK TRUCKS, INC | 10/03/1978 | 10/12/1979 | 571 | 121 | |||||
| Defect 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. this constitutes a non-compliance to federal motor vehicle safety standard no. 121, air brake systems. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | Dealer will install new wheel speed sensors that incorporate improved wiring and the present bogie anti-wheel lock system will be changed to an axle-to-axle system for improved reliability. | |||||||||||||||
| Notes | Vehicle description: heavy trucks.system: service brakes; electrical wiring and connectors.consequences of defect: this delay in effective braking action could lead to anaccident under certain traffic conditions. | |||||||||||||||
| STEERING - WHEEL AND HANDLE BAR | ||||||||||||||||
| 79V082000 | MACK TRUCKS, INCORPORATED | from 03/01/1977 to 11/01/1978 | V (Vehicle) | 12000 | 08/13/1979 | MFR | MACK TRUCKS, INC | 04/03/1979 | 10/12/1979 | |||||||
| Defect Summary | An improper pinch bolt and nut may have been used in the clamping of the steering shaft to the steering gear input shaft. due to clamping force loads applied at the bolt, the nut could yield, resulting in looseness of the input shaft yoke. should this condition go unnoticed, spline wear could cause shaft separation. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | Vehicles will be inspected and, if necessary, the correct fasteners will be installed at no charge to owner. | |||||||||||||||
| Notes | Vehicle description: heavy trucks.system: steering; steering shaft clamp bolt.consequences of defect: this defect could cause loss of vehicle control and avehicle accident. | |||||||||||||||
| SUSPENSION - MULTIPLE AXLE | ||||||||||||||||
| 78V031000 | MACK TRUCKS, INCORPORATED | from 03/01/1975 to 02/01/1978 | V (Vehicle) | 33000 | 08/16/1978 | MFR | MACK TRUCKS, INC | 02/09/1978 | 10/12/1979 | |||||||
| Defect Summary | The tee bracket, which is mounted on the front axle of the bogie, may fail due to vibration brought on by road surface irregularities. bracket failure would leave the tee bracket unsupported and cause broken hose connector fittings. this would result in automatic application of the spring emergency brakes. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | The dealer will replace the defective bracket with a redesigned version. | |||||||||||||||
| Notes | Vehicle description: trucks equipped with highway bogies.system: suspension; tee bracket.consequences of defect: automatic application of the spring emergency brakescould cause loss of vehicle control and an accident. | |||||||||||||||
| 79V017000 | MACK TRUCKS, INCORPORATED | from 01/01/1977 to 12/01/1978 | V (Vehicle) | 4000 | 08/13/1979 | MFR | MACK TRUCKS, INC | 01/12/1979 | 10/12/1979 | |||||||
| Defect Summary | A casting deficiency exists in the lower section of the caps resulting in a reduction in the thickness of the material. failure of a cap can allow the end of the rear spring to detach from the axle housing. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | Dealer will inspect and, if necessary, replace any of the spring insulator caps found to be defective. this will be done at no cost to owner. | |||||||||||||||
| Notes | Vehicle description: trucks, heavy.system: suspension; insulator cap.consequences of defect: loss of vehicle control can result and lead to avehicle accident. | |||||||||||||||