Tbran, New or old you still need hyd. valve to add to valve stack to operate.As for yours not working,do you mean that it will not operate clutch in reverseIJAre you sure that it is a hyd. problemIJIf this is the old spring style clutch,you may have a spring broke in clutch itself.(Nothing that a $200 bill won't repair.)Or,you may have a key sheared off on output shaft of hyd. motor.($0.50 fix here).