THE ZINC PLATING OPERATION PERFORMED ON THE UPPER STEERING COLUMN SHAFT COUPLING BOLT CAUSED HYDROGEN EMBRITTLEMENT AND BREAKAGE OF THE BOLT.
RiskFRACTURES OF THE UPPER STEERING COLUMN SHAFT COUPLINGBOLT RESULT IN A LACK OF COUPLING LOAD ON THE SHAFT AND LOSS OF STEERINGCONTROL.
FixREPLACE THE ZINC PLATED BOLT WITH A PHOSPHATE PLATED BOLT.