Cat 225 hydraulic issue

[digs2]

When I crowd in and and curl the bucket in at the same time a relief valve stalls and things seem stressed ?
If I carefully use one function at a time it passes and runs normal , maybe a bit of valve strain but not always ?
Not sure if I should begin on the distributor ,the swivel or controls ?

 

[uffex]

good day Digs2
Your post is not so easy for me to follow. May I ask a couple of questions 1- when use the bucket cylinder to lift the relief valve are you at full stroke? 2. I do not follow the connection to the central rotary joint or is there more to the event that you have not mentioned?
Kind regards
Uffex

 

[digs2]

When i engage the bucket cyl and the stick cyl at the same time partial stroke the machine seems to bind and relief valve howls.
It doesnt do it every time ?
Thanks for the consideration !