Ec 240 LC.EC240, B , C , D . and S/N
The dipper arm in or out in relief was ok
Only when raising the boom or steering the tracks. Straight travel is okDoes the engine pull down using the boom function in both directions?
Stalling from excessive load while boom is raised. At no load machine is reaching full throttle. MCV was dismantled and all O-rings were replaced without disrupting pressure setting of any valve. Main relief valve has been replaced a month back .Please describe, "shutting down "
Sudden and abrupt stall, turning off as if keyed off or stalling from excessive load. MCV overhaul, were pressures reestablished after overhaul? If boom is stalling you out. Suspect port and main relief may be bottomed out. Without seeing its behavior, I'd start there.
So straight EC240 would be more Samsung than Volvo. Cummins power with stepper motor. Are you reaching full throttle at no load.
Engine is stalling when operated in combination alsoMy first thoughts are that the negative control line are cross connected, if the boom fails to stall when you operate in combination with the arm will confirm if this is the case.
Kind regards
Uffex
That is true if that has happened before it indicates a fundamental issue with adjustment as FwF suggests finding the cause would be the logical way to go.That is uncommon. I don't think I have ever found a broken regulator. Leaking and sticking from foreign debris but never broken. And you say this has been a repeat failure. That's gonna be a challenge to find cause.