THE ZINC PLATING OPERATION PERFORMED ON THE UPPER STEERING COLUMN SHAFT COUPLING BOLT CAUSED HYDROGEN EMBRITTLEMENT AND BREAKAGE OF THE BOLT.FRACTURES OF THE UPPER STEERING COLUMN SHAFT COUPLINGBOLT RESULT IN A LACK OF COUPLING LOAD ON THE SHAFT AND LOSS OF STEERINGCONTROL.
DESCRIPTION OF COMPONENT
STEERING:WHEEL AND HANDLE BAR
RESOLUTION
REPLACE THE ZINC PLATED BOLT WITH A PHOSPHATE PLATED BOLT.