Is it normal that the pressure of the boom raise at Low idle is 145bar and at high idle it is 175 bar. The reason I am asking is the slow speed of the boom and even if i try to raise the bucket (when full) and the arm is fully extended, the boom doesn't raise at all.
By the way if I try to jack the machine using only the boom lower joystick (the arm is in vertical position), the machine will jack without any problem
Sounds like a port relief valve has let go, OR you have bad piston seals in one or both cylinders. Find the boom valve spool with the port reliefs and temporarily swap them if you can, see if the problem switches from up to down. Or if it's easier swap the two main hoses going to the boom cylinders at the valve or at the boom foot before they tee off. If it's the cylinder seals, GET THEM FIXED QUICK, as the high pressures created can swell the cylinder tubes or even cause worse damage.
I will check and let you know