I purchased a double grapple bucket with a rake in between them and all of the hydraulics . I THOUGHT I was having trouble bleeding the air out of the system. No it turned out it bleeds the air out on it’s own quite well. My problem was learning how to use the forward and back lever and push the button at the same time to make it work. Sometimes we make a problem in our heads when it is much simpler, just learn how to use the switch. I really like the grapple it came well packaged over 2000,00 miles not one broken box and a day early. They sure know their work not one scratch. Thank you