John Deere 310E backhoe swing drifting the swing for the backhoe will drift either direction, engine on or off. It is a 2 cylinder setup with the lines T'd to each one so essentially one is pushing while the other is pulling to swivel one way or the other. Because of this dual cylinder setup it makes me NOT think that a cylinder is worn unless coincidentally both are. Anyone have an idea for any tests to decipher if the valve is leaking by or both cylinders leaking?
It only takes one cylinder leaking for both to move, so that's definitely a possibility. With the two cylinders essentially opposed you can get four flat face caps and disconnect and cap the supply lines. if it still drifts, then the cylinders are leaking.
thank you for the reply. I wrapped my head around it and since the 2 cylinder are T'd together it would bypass into the other. Sure enough, I capped them then used a portapower and a guage to test each cylinder separately and found the bad one. $25 later in a piston seal kit is is working like new. Thank you for the help!