I have a bx22 and have had a leaky valve assembly for the backhoe. The diamond shaped plates that the control pistons go through hold down a nylon type washer against the seal. The plate gets bowed up and the washer forces its way out until it is shaped like a tear drop and allows hyd. fluid to leak. This has happened on all the valves even the leveling feet which I can not see how I could over load them if it is an overloading issue. Has anyone seen this happen , what is causing it and how can I resolve it. Thought I would ask before I get stuck with a large repair bill.