Volvo EC 210 BLC pressure problem.

[jc.zietsman]

I have a volvo ec 210 blc which i recently bought with around 11k hours on it. I have a problem with the hydraulic oil heating up due to the pump nearest the motor running at full pressure when the machine revs up. i have a service manual for it and i have checked the regulators as indicated. i then swapped the servo lines from the regulators over but the problem still persisted on the pump closest to the engine. i then put the servo lines back and swapped the main pressure feed pipes over and then the problem switched over to the front pump ie the pump away from the engine. i find this very strange as the amount of flow from the pump is controlled by the servo pressure however the problem only switched over when swapping the main pressure feed pipes. if anyone has had a similar problem to this or any ideas why this could be the case?

 

[mikebramel]

pressure = restriction down stream

 

[uffex]

Good day JC
You have a negative control regulation its important to change both main and regulation lines to trouble shoot, please explain is this an issue when you are not using any circuit the line is loaded?
Re
Uffex