United States 93V027000
STEWART & STEVENSON SERV.
The problem
REGULAR NUTS, INSTEAD OF LOCKING NUTS, WERE USED TO SECURE AN EXTENSION ARM FROM THE FORWARD SIDE OF THE WINDSHIELD WIPER MOTOR TO THE WIPER ARM. THE NON-LOCKING NUT CAN LOOSEN AND ALLOW THE EXTENSION ARM TO "SLIP" OFF THE TAPERED SHAFT CAUSING THE WIPERS TO CEASE TO FUNCTION.
Risk
NON-FUNCTIONING WIPERS RESULTS IN REDUCED VISIBILITY FORTHE DRIVER IN INCLEMENT WEATHER CONDITIONS AND INCREASES THE RISK OF OCCURRENCEOF AN ACCIDENT.
What owners should do
REPLACE THE REGULAR NUTS WITH A LOCKING NUT.
Units 15