Anonymous-0
Well-known Member
I have Cat 931b with a backhoe. I heard a "pop" when using my backhoe and then the stick cylinder wouldn't do anything. The stick was all the way in with the cylinder fully extended. The control valve seems fine and it feels like oil is going through the hoses but the engine doesn't labor at all against the relief valve. That cylinder always creeped a little and I'm wondering if a seal can just all of a sudden blow out with a "pop"? The only other thing I can think is the cylinder rod broke internally but then I'd think it would be more a loud bang rather than a pop. If I put the boom down and drive ahead the stick goes out but as soon as I lift the boom the stick just drops back down.