NHTSA recall 88V102000
Steering › Gear box (other than rack and pinion)
Mack RD Series
Reported Jun 27, 1988140 vehicles affectedMACK TRUCKS, INCORPORATEDBuilt Sep 1, 1987 – May 1, 1988
The defect
Compression of front springs could interfere with the 90 degree crossover fittings on the bottom of the gears.
The risk
If one of the fittings break, the hydraulic fluid islost, resulting in loss of power steering and possibly a crash.
The remedy
Replace center port steering gear cylinder heads with new side port cylinder heads. also, install thicker bumper stops to eliminate spring to gear contact.