Hey I’m working on a Volvo ec140 and I believe it’s a 2020 I’m looking for a hydraulic system diagram so I can pin point specific valves in the system to check for an internal leak that would be cause the main boom to slowly drop I’ve already tested the boom cylinders for back flow and they all passed and the operator is complaining that the bucket sometimes gives up and releases pressure along with the roto tilt but I want to find and locate the holding valve first and see if that needs to be repaired any information will be helpful thank you! Serial# 314569
Anyone have any info for this machine and or could point me in the direction on how to get ahold of information for it?