I just got a 911 backhoe ,I have to replace the swing cylinder seals,how do I get the cylinder off? it looks like there is two blocks welded on,and the caps can be removed.they hold the cylinder to the frame by pins welded to the cylinder,but it looks like teeth on the cylinder will not leave me get the cylinder off because they mesh in a gear that turns the boom.do I have to remove the boom or is there some other way? any advise would appreciated thanks