1974 MACK MACK Recalls (3)
- Campaign:
- 74V152000 on 10/11/1979
- Component:
- Wheels:center section
- Affected:
- 46
- Notes:
- Trucks equipped with aluminum wheels 22.5x7.50.possibility that wheels weremachined in a convex out-of/flat condition on the inside wheel mountingsurface.if this condition exists, it may increase the assembly stress on thehub and cause it to fail.(correct by inspecting and replacing with propermachined wheel where necessary).
- Campaign:
- 74V100000 on 10/11/1979
- Component:
- Steering:hydraulic power assist system
- Affected:
- 567
- Notes:
- Mack campaign no n/a.truck tractor.possibility that the pins that attach acap to the piston assembly in the drag link torque valve, in the air-o-maticpower steering systems, may not be adequate to retain the cap to the piston forthe duration of its expected life.(correct by inspecting and replacing torquevalves with new ones).
- Campaign:
- 87V010000 on 02/12/1987
- Component:
- Suspension:rear:springs:air suspension system
- Manufactured:
- 10/31/1971 - 01/31/1987
- Affected:
- 5,235
- Defect:
- Crossmember can be overstressed and can fail, allowing the broken crossmember to protude above the top of the frame and interfere with chassis components.
- Consequence:
- Trailer handling could be affected during turningmaneuvers which could result in loss of truck control and a crash. also, acompletely separated crossmember could affect height of suspension air springsand the resulting lean could result in loss of control.
- Correction:
- Installation of a bolted double plate type crossmember to replace the standard channel type crossmember.
- Notes:
- System: rear crossmember with neway air suspension.vehicle description: heavy duty trucks:dm,f,fm,mc,mce,mh,mr,r,rd,rs,rl,rw,rwl,rws and u models equipped with neway airride drive axle suspension.
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