1988 MACK DMM SERIES Recalls (5)
- Campaign:
- 88V085000 on 05/25/1988
- Component:
- Power train:driveline:center support bearing
- Manufactured:
- 10/31/1987 - 10/31/1987
- Affected:
- 203
- Defect:
- Clamp plates used between the drive shaft and carrier yokes may crack and could break due to improper heat treatment.
- Consequence:
- If clamp plate breaks, yoke would fly off at detachedpoint and could injury anyone struck by flying fragments. also, the detachedinner shaft could interfere with the brake system air supply hoses and tractortires, which could result in loss of truck control and an accident.
- Correction:
- Install new clamping plates and capscrews in all locations as needed.
- Notes:
- System: drive shaft yoke clamp plates.vehicle description: heavy duty trucks.
- Campaign:
- 88V125000 on 08/03/1988
- Component:
- Steering:linkages
- Manufactured:
- 07/31/1987 - 03/31/1988
- Affected:
- 6,400
- Defect:
- Some of the nuts/bolts used to fasten the steering pitman arm may loosen.
- Consequence:
- This would allow the pitman arm to come off the steeringgear sector shaft and result in immediate loss of steering control and a vehiclecrash could occur.
- Correction:
- Retorque nuts/bolts where necessary.
- Notes:
- System: steering pitman arm.vehicle description: heavy duty trucks.
- Campaign:
- 88V161000 on 10/27/1988
- Component:
- Engine and engine cooling:engine
- Manufactured:
- 02/29/1988 - 02/29/1988
- Affected:
- 408
- Defect:
- Certain engine support castings were produced with faulty metallurgy and could fail.
- Consequence:
- Failure of one or both brackets could cause dislocationof engine and transmission assembly, which could result in truck disablement,possible loss of accelerator control and an accident.
- Correction:
- Replace rear engine supports as necessary.
- Notes:
- System: engine rear supports.vehicle description: heavy duty trucks.
- Campaign:
- 89V032000 on 03/15/1989
- Component:
- Steering:hydraulic power assist:hose, piping, and connections
- Manufactured:
- 02/28/1987 - 08/31/1988
- Affected:
- 3,127
- Defect:
- An incorrect high pressure power steering hose may have been installed.
- Consequence:
- Under certain conditions, hose could fail resulting inloss of power steering assist and possibly an accident.
- Correction:
- Replace incorrect power steering hoses.
- Notes:
- System: power steering hose.vehicle description: heavy duty trucks equipped with stratoflex high pressurepower steering hose.
- Campaign:
- 89V033000 on 03/20/1989
- Component:
- Suspension:rear:springs
- Manufactured:
- 08/31/1987 - 09/30/1988
- Affected:
- 152
- Defect:
- Dowels may have been omitted during spring cap installation; this would put shear load on the four (4) spring cap bolts.
- Consequence:
- This could result in loosening and failure of the boltswith possible loss of control and accident potential.
- Correction:
- Install the missing dowels to prevent movement between the spring cap and axle housing.
- Notes:
- System: spring cap to axle housing connection dowel.vehicle description: heavy duty trucks.
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