MoonSwine
Member
Hi All,
I introduced myself in another thread. I've been troubleshooting an issue with my new to me SK250 for about a month now.
Problem: After I took delivery of the machine, I worked it three different evenings and put about 7 hours on the clock. I climbed in on the fourth evening, started the machine, locked the safety lever on the left and pulled the right stick up to raise the boom. Nothing happened. It acted like the safety lever had not been latched. I ended up pulling the seat out, checking all the fuses, unplugging/replugging all the connections to the controller behind the seat and still got nothing. I let it sit over the weekend and called the dealer and they suggested I check to make sure the swing lock wasn't engaged. I went to check it out, pushed a few buttons and it started working.
To make a long story short, this happened three more times. The second and third time I played around with the control panel and it just started working again. I never knew what button or combination of buttons I pushed to make it work. The fourth time it happened, I couldn't get it to work again, so I called the dealer again. They sent a forklift tech out to help us check things over. We went through fuses, control panel, looked at harnesses, checked batteries, checked grounds, etc. We couldn't find a thing wrong.
Resolution: I called the local Kobelco dealer to ask if they could check my controller to see if it was operating properly. The guy asked what was wrong and I explained. He said, "it sounds like the pilot control valve solenoid isn't working". So, we located the bank of solenoids back behind the cab and guessed that the first solenoid in the bank would be the main solenoid. I didn't know if this thing was 12v or 24v and if it had a positive/negative side. I took it to the dealer and spoke with the tech and he suggested we swap the first and second solenoid. We did that and the machine started working. We left the second solenoid unplugged and I got a "power boost" error on the display. We plugged it in and the error went away. So, it ended up being that solenoid (A1 on the hydraulic schematic) and I can run the machine with the second solenoid (A2 on the hydraulic schematic) plugged in but apparently not working.
I don't know if it's real or perceived, but it seems like the machine is running slower now than it was before. It doesn't seem to have the same power, but I haven't spent that much time on it.
My question: Will it hurt anything to run the machine with that second solenoid doing nothing (the dealer is sending me another solenoid, but I don't know when it will arrive)? The dealership printed out a page that explains what the usage is for the solenoids. There are three of these solenoids in the bank of eight and the usage column has the following for the three:
Attachment Boost, Lever
Lock, Travel 1, 2 Speed,
Arm Var. Recirc
Solenoid, See FIG
C08-71
Thanks for any help or suggestions.
I introduced myself in another thread. I've been troubleshooting an issue with my new to me SK250 for about a month now.
Problem: After I took delivery of the machine, I worked it three different evenings and put about 7 hours on the clock. I climbed in on the fourth evening, started the machine, locked the safety lever on the left and pulled the right stick up to raise the boom. Nothing happened. It acted like the safety lever had not been latched. I ended up pulling the seat out, checking all the fuses, unplugging/replugging all the connections to the controller behind the seat and still got nothing. I let it sit over the weekend and called the dealer and they suggested I check to make sure the swing lock wasn't engaged. I went to check it out, pushed a few buttons and it started working.
To make a long story short, this happened three more times. The second and third time I played around with the control panel and it just started working again. I never knew what button or combination of buttons I pushed to make it work. The fourth time it happened, I couldn't get it to work again, so I called the dealer again. They sent a forklift tech out to help us check things over. We went through fuses, control panel, looked at harnesses, checked batteries, checked grounds, etc. We couldn't find a thing wrong.
Resolution: I called the local Kobelco dealer to ask if they could check my controller to see if it was operating properly. The guy asked what was wrong and I explained. He said, "it sounds like the pilot control valve solenoid isn't working". So, we located the bank of solenoids back behind the cab and guessed that the first solenoid in the bank would be the main solenoid. I didn't know if this thing was 12v or 24v and if it had a positive/negative side. I took it to the dealer and spoke with the tech and he suggested we swap the first and second solenoid. We did that and the machine started working. We left the second solenoid unplugged and I got a "power boost" error on the display. We plugged it in and the error went away. So, it ended up being that solenoid (A1 on the hydraulic schematic) and I can run the machine with the second solenoid (A2 on the hydraulic schematic) plugged in but apparently not working.
I don't know if it's real or perceived, but it seems like the machine is running slower now than it was before. It doesn't seem to have the same power, but I haven't spent that much time on it.
My question: Will it hurt anything to run the machine with that second solenoid doing nothing (the dealer is sending me another solenoid, but I don't know when it will arrive)? The dealership printed out a page that explains what the usage is for the solenoids. There are three of these solenoids in the bank of eight and the usage column has the following for the three:
Attachment Boost, Lever
Lock, Travel 1, 2 Speed,
Arm Var. Recirc
Solenoid, See FIG
C08-71
Thanks for any help or suggestions.