Case Hydraulic pump Coupling | Coupler. We offer top quality Hydraulic pump coupling for Case excavators and backhoes. Stock include coupling for Case 9010 9010b 9020 9020b 9030 9030b 9040 9040B CX210 CX240 CX21 CX36 CX26C CX30C CX36C 780B 680H 9060B CX27B CX31B CX36B. Contact us today and we will get the right coupling for you.