MrEvilPirate
Active Member
PC50uu-2 serial 14484.
This machine has an offset boom. This "Four" system prevents you from taking a bite out of the cab when the boom is offset in the left hand position. It also lets you set max height and depth for the boom/stick.
There are potentiometers for the boom, stick, and the offset. They talk to a controller in the cab. There is a console that can give you info like what depth you are digging at... that display is supposed to show error codes when there is a problem. There is also a dummy light that flashes when there is an issue with the system. When there is a problem with the system it locks you out from raising the boom, pulling in the stick, or off setting to the left.
There is a "cancel switch" under the seat that over rides this so you can get it into a safe spot or get the machine into the correct position to do a reset. My manual has a procedure for reset you boom up, stick in, bucket curl, and full off set right. Then there are some wires you are supposed to connect and you get an error code or successfully reset.
The wires I have don't match the description (colors) in the manual, something happens when I connect them because the dummy light flashes in different pattern but I don't get error codes displayed and the "reset" is not successful.
Has anyone dealt with this? The existing cancel switch is momentary, you have to hold it up then it pops back down to the default position. I am considering just replacing it with a 2 position switch and just cancel out the system.
I called Komatsu dealer they won't touch it since it is grey market. They recommended a local independent guy. I talked to him for about 20 minutes, he said every time he needs to deal with these systems it is always a box of worms. He is also busy for the next several weeks.
Any ideas guys? All connectors to the pots look good. Machine was running fine yesterday, I was lifting some brush off a trailer, dragged the bucket off the trailer it bounced a bit that's when the light came on. It reset by itself the first time (power cycling the machine) but the limiting function would kick in really early (bucket several feet from the front blade). Now the light is on all the time.
This machine has an offset boom. This "Four" system prevents you from taking a bite out of the cab when the boom is offset in the left hand position. It also lets you set max height and depth for the boom/stick.
There are potentiometers for the boom, stick, and the offset. They talk to a controller in the cab. There is a console that can give you info like what depth you are digging at... that display is supposed to show error codes when there is a problem. There is also a dummy light that flashes when there is an issue with the system. When there is a problem with the system it locks you out from raising the boom, pulling in the stick, or off setting to the left.
There is a "cancel switch" under the seat that over rides this so you can get it into a safe spot or get the machine into the correct position to do a reset. My manual has a procedure for reset you boom up, stick in, bucket curl, and full off set right. Then there are some wires you are supposed to connect and you get an error code or successfully reset.
The wires I have don't match the description (colors) in the manual, something happens when I connect them because the dummy light flashes in different pattern but I don't get error codes displayed and the "reset" is not successful.
Has anyone dealt with this? The existing cancel switch is momentary, you have to hold it up then it pops back down to the default position. I am considering just replacing it with a 2 position switch and just cancel out the system.
I called Komatsu dealer they won't touch it since it is grey market. They recommended a local independent guy. I talked to him for about 20 minutes, he said every time he needs to deal with these systems it is always a box of worms. He is also busy for the next several weeks.
Any ideas guys? All connectors to the pots look good. Machine was running fine yesterday, I was lifting some brush off a trailer, dragged the bucket off the trailer it bounced a bit that's when the light came on. It reset by itself the first time (power cycling the machine) but the limiting function would kick in really early (bucket several feet from the front blade). Now the light is on all the time.