1985 MACK MACK Recalls (7)
- Campaign:
- 86V005000 on 01/20/1986
- Component:
- Power train:axle assembly:axle shaft
- Manufactured:
- 05/31/1985 - 11/30/1985
- Affected:
- 484
- Defect:
- Incorrect inner wheel bearings were installed in the rear axles which wears a groove in the spindle due to a poor fit. consequence of defect: a deep groove could cause the axle housing to break and result in a vehicle crash without prior warning.
- Correction:
- Replace inner wheel bearing with correct bearing. also, if a groove is present, remove the groove and assure that no cracks are present. replace housing if cracked.
- Notes:
- System: rear axle inner bearing.vehicle description: heavy duty trucks equipped with mack ss440c or sw440c rear axle.
- Campaign:
- 86V009000 on 01/27/1986
- Component:
- Suspension:rear:springs:leaf spring assembly
- Manufactured:
- 12/31/1977 - 08/31/1985
- Affected:
- 11,000
- Defect:
- The spring eye bolt was not torqued properly and could fail due to the loose fit within the spring eye bushing/hanger bracket. consequence of defect: the spring could fall onto the road surface, without warning to the driver, and a vehicle crash could occur due to the sudden drag of the spring.
- Correction:
- Not available at this time. in the interim the torque of the spring eye bolt will be checked.
- Notes:
- System: spring eye bolt.vehicle description: heavy duty trucks with st34 or st38 series rear axle.
- Campaign:
- 86V040000 on 03/23/1986
- Component:
- Suspension:front:wheel bearing
- Manufactured:
- 04/30/1982 - 09/30/1985
- Affected:
- 50,100
- Defect:
- Front steering knuckle thrust bearing may shatter into pieces due to improper heat treatment. consequence of defect: failure of the bearing may affect steering control. if bearing disintegrates, it would result in increase steering drag and/or cause steering lock up with loss of control which could lead to an accident.
- Correction:
- Replace defective thrust bearings.
- Notes:
- System: steering knuckle. vehicle description: all models equipped with a fa536, fa537, or fa538 series front steering axle.
- 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.
- Campaign:
- 88V126000 on 08/07/1988
- Component:
- Service brakes, air:supply:hoses, lines/piping, and fittings
- Manufactured:
- 04/30/1985 - 06/30/1986
- Affected:
- 24,106
- Defect:
- Some air brake hose assemblies may not comply with burst strength requirements of fmvss 106.
- Consequence:
- Vehicles do not comply with standard.
- Correction:
- Replace suspect hose assemblies.
- Notes:
- System: air brake hose assembly/fmvss 106.vehicle description: heavy duty trucks.
- Campaign:
- 89V022000 on 02/26/1989
- Component:
- Suspension:rear:springs:leaf spring assembly:u-bolt, leaf spring to axle
- Manufactured:
- 12/31/1983 - 12/31/1988
- Affected:
- 18
- Defect:
- An incorrect 3/4 inch bolt was installed on rt/rs 450 suspension.
- Consequence:
- This bolt may break, causing disengagement of the beam connection of rear suspension, resulting in loss of control, which could result in an accident.
- Correction:
- Retrofit chassis with 1 inch bolts.
- Notes:
- System: suspension.vehicle description: heavy duty trucks built with hendrickson rt/rs 450suspension.
- Campaign:
- 90V010000 on 02/05/1990
- Component:
- Suspension:rear:springs:leaf spring assembly
- Manufactured:
- 12/31/1977 - 11/30/1987
- Affected:
- 14,800
- Defect:
- The 7/8 inch spring eye bolts within the spring eye bushing hanger bracket of the rear suspension may fail.
- Consequence:
- The spring could fall onto the road surface, without warning to the driver, and a vehicle crash could occur due to the sudden drag of the spring.
- Correction:
- Replace all 7/8 inch diameter spring eye bolts with 1 inch diameter bolts.
- Notes:
- System: suspension; spring eye bolt.vehicle description: heavy duty trucks with st34 or st 38 rear suspension.
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