FLOW CONTROL DEVICE FOR VARIABLE DISPLACEMENT PUMP

PURPOSE:To obtain a total delivery control device of a pump which enables two types of maximum delivery by providing a pilot stopper on the backing direction of a pressure compensating pressure receiving part and varying the backing limit of said pressure compensating pressure receiving part by means of a pilot pressure. CONSTITUTION:When a pressure compensating pressure receiving part 5 is backed against a spring 9 by means of a pilot pressure Pi in a condition that a pilot pressure Pic does not act on a plot stopper 20, since the pilot stopper 20 has no force of preventing the backing of the pressure compensating pressure receiving part 5, a servo-piston 12 is moved to a place where it is stopped by a maximum flow regulating stopper 23, obtaining the maximum delivery. When the pilot pressure Pic is introduced into a liquid chamber 18, the pilot stopper 20 is advanced to limit the backing of the pressure compensating pressure receiving part 5. Thereby, the servo-piston 12 is stopped in front of the maximum flow regulating stopper 23, to obtain a different maximum delivery.