Hydraulic Q's

[fhhhstix]

As you retract the cylinder the rod takes up space and not as much fluid is needed to move the piston as what is needed to extend the cylinder. The level of the fluid in the tank will go up and down with these actions. You should have some air space in the tank when the excavator is in the ready position (boom up with the stick strait up and down). In this position the cylinders should be close to half stroke. As RCP57 said the breather should be open so the tank doesn't build up pressure or vacuum (what it does) which will cause the pump to labor or the tank to collapse or explode if it is not open (the purpose).


Travis

[tman1986]

hey thanks for the help, really appreciate it

heres some pics of the hydraulic system, i dont really know how to post them so i just attached them

see the fourth servo nearest the tank thats the one i was mentioning

also notice in the pic of the front/side of the valve block there are 2 outputs that loop through the filter and "T" joint before going back to the tank, just seems like that is hosed wierd, your opinions would be a great help

and i would like to mount a pressure gauge in this system i think the best place is right between the pump outlet and the valve block inlet (black hose beside clear center pic) but again your opinions would help my decision making alot easier

Thanks again
Trevor