Fluid level is good & everything is greased? I've got a new Kubota L3901 tractor with a backhoe attachment. and only 125 hours. I've started getting a real loud squeal in just the last 10 hours. I'm pretty sure it's coming from the dipperstick cylinder. The noise is only when I extend or contract the boom. It sounds like metal on metal but every zerk is greased and the hydraulic fluid is good. Any and all ideas would be great before having to haul it to the dealership. Thanks!