Hello Azizul! Thanks for the reply and I'll be in touch with you soon I just need to find out how to send private mesage first...
I need a little time to get used to the forum that's all. About the pressure, you shoud consider that any over pressure is waste as you'll put you equipment components fighting against each other. You will end up wasting lots of anergy that you dont have to. About you trying bigger pump, I believe you already have a beast in there, make sure your lines have the capacity for that much flow+ you dont want The excavator to be too fast, it wont look good, just like mine is too slow.