Hello guys. I am fitting a rotate circuit on my cat 312c machine to rotate a grab left and right. My question is how do i load up the pumps to send oil out to the grab rotator. I am using the 2 buttons on top of the joystick to work my rotate valve left and right, my feed is coming from spare blank port on outlet of pump and last pipe is to tank.. I want to load the pumps without using the joystick aswell as it will be more operator friendly. Hammer pipes are beem used to open and close grab. Thanks
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