United States 90V052000
Mack Trucks, Inc.
The problem
INTERFERENCE BETWEEN STEERING GEAR SECTOR SHAFT AND THE FRAME RAIL THROUGH HOLE CAN CAUSE SECTOR SHAFT WEAR AND CAN WEAKEN SHAFT CAUSE IT TO BREAK.
Risk
SHAFT FAILURE DURING VEHICLE OPERATION WOULD CAUSE LOSS OF STEERING CONTROL AND A CRASH WITHOUT PRIOR WARNING.
What owners should do
ENLARGE FRAME RAIL THROUGH HOLE TO PREVENT INTERFERENCE: REPLACE STEERING GEAR SECTOR SHAFT IF SCORED.
Units 267