I believe one hose connects to a fitting on the crankcase.-----That hose feeds crankcase pressure to the oil tank.------Oil then flows to the tank on the motor to keep it full as oil is used by the pump.-----caps are to be kept tight.---Also a hose that bleeds pressurre off the system when engine is stopped.-----If you are going to use the oil injection feature it is best to have a dealer check it .---Dealer will do a test of oil pump output too.
