These air conditioning compressor pumps all suffer the same common fault. The bolt which retains the shear plate (attached to the drive pulley) to the pump shaft loosens over time. If spotted early the bolt can be seen unwinding itself, eventually it loosens completely and is lost. The pulley will continue to spin with the engine causing the splines within the shear plate to strip. Once this happens the air conditioning pump will no longer function and produce cold air as the pully can no longer drive the pump. Previously the only solution was to replace the complete compressor at vast expense. We now provide just the shear plate and bolts so you can repair your compressor and restore the A/C at a fraction of the price.