hello i wanted to see if someone has had the same problem as me and if they have found a solution. i have a kx018-4 and the bucket, boom and tracks are slow and an a hose coming from the hydraulic pump gets a lot of pressure and makes lots of noise and the fluid tank gets lots of bubbles. we took it to the dealer and the couldn't find the problem and just changed all the seals of the control valve and didn't fix it and had to pay a large amount. i have replaced the the hydraulic piston pump and unload valve but haven't figured out the issue and im thinking of replacing the whole control valve system please help. thank you