COUPLING BETWEEN A PUMP CAM SHAFT AND A GEAR
A coupling is disclosed which is configured to interface with and deliver torque between a first and second member. The coupling may be part of a fuel pump system for a diesel engine and may transmit torque between a fuel pump cam shaft and a gear through compressive forces on the coupling. In the event that the coupling breaks, torque is still transmittable through the coupling. The cam shaft is configured to retain the coupling in place, as well as to break upon the delivery of a maximum torque. The disclosed torque delivery system provides increased strength to withstand engine overspeed events.