Mack Hydraulic Power Assist System Recall 91V080000 (35 Vehicles)

The problem

Incorrect manufacture of the hydroboost cylinder allows the ball socket clamp to contact right side steering lever on an extreme left turn and cause flexing of the cylinder rod .

The risk

This flexing can cause seal failure or cylinder failureof the hydroboost unit and result in loss of steering control and result in avehicle accident.

The fix

REPLACE INCORRECTLY BUILT BOOST CYLINDERS.

Contacts

System: steering power assist, hydroboost assembly.Vehicle description: cf aerialscope model.

What to do

Check your VIN. Enter it at nhtsa.gov/recalls - it shows whether this recall applies to your vehicle and whether the repair has been done.
Call a dealer. Any authorized Mack dealer will do the repair free, whether or not you bought the vehicle there. Quote campaign 91V080000.
Ask about parts and a loaner. If parts aren't available yet, ask what to do in the meantime.
Keep your paperwork. If you paid for this repair before the recall, you may be able to get reimbursed - here's how.

Vehicle	Complaints	Recalls	Grade
1988 Mack CF	0	5	D
1989 Mack CF	0	4	D

Vehicle

Complaints

Recalls

Grade

1988 Mack CF

1989 Mack CF

Questions

Is the 91V080000 recall repair free?

Yes. Federal law requires the manufacturer to fix safety recalls free of charge. MACK TRUCKS, INCORPORATED's dealers do the work; the remedy is described above.

How do I know if my vehicle is part of recall 91V080000?

Not every vehicle of a listed model year is included. Enter your 17-character VIN at nhtsa.gov/recalls or call a dealer with your VIN.

When was recall 91V080000 announced?

MACK TRUCKS, INCORPORATED reported it to NHTSA on May 23, 1991. Owners are usually notified by mail within about two months.

Steering: hydraulic power assist system Mack recall