I have a Kobelco 350 I believe is what it is and it was working just fine we brought it to another job started grabbing and it just started moving way way way slow it did that for about four months then all of a sudden for a day it was working just fine and then it went back to totally slow moving please tell me somebody knows something about it
Good day & welcome Suggest you check the pilot pressure when the fault occurs Kind regards Uffex
Model no - 6,-6e? Year? Any faults on screen?
No there is no fault codes on it. Do you think it could be stuff in the valves or blocking the flow of hydraulic fluid? Because it was being slow then it just started working perfect for a day. I started it up the next day let it warm up took a couple scoops tracked about 10 feet then it went back to really slow. Also the tracks wont move it If your not lifting the boom barley. And to lift the the boom it has to be pulled all the way in
I will need a model and year to be more pacific but sounds to me like a sticking straight travel solenoid
What you are describing sounds like a problem in the load sense portion of your hydraulic system. There is a series of check balls in every function valve on your machine. They all tie together and send a signal to the pump to make a few hundred psi more than the largest load in the system. In a perfect world the highest pressure is always the one the pump should get. If debris gets into the tiny check balls then all bets are off. A good test of the system would be to run one of your functions to the end of its travel while performing a second function a see if the machine suddenly speeds up. This is in effect, faking a load sense signal to the pump. As for a fix, you might try removing the load sense line at the pump and flushing it out by trying each function one at a time. Hope this helps.
Its a 2008 Kobelco SK350LC-8 I really appreciate every ones help. I'm not used to anyone helping without getting something out of it. So thank you!
probably loose connections at the pump high pressure sensor and/or solenoid. Just check the connectors and unplug replug and see if they are loose etc. there's 2 Hugh pressure sensors and 2 solenoid at the hydraulic pump. usually the connectors get loose or the insulation gets word through etc and gives intermittent issues like that without actual FC.