M108X RPM climbing on their own or can’t rave up at all

[Jens]

Hi there,
My tractor is still acting up. It is raving up on its own now after about 5-10 min after I started it up and the only way to stop it is to shut it off. Other times after about the same time I can’t throttle up at all.
We changed the accelerator position sensor but this didn’t make a difference. I believe there is a second sensor which works together with the accelerator position sensor. This one is quit expensive.
Does anyone have any hints.
I bought the parts manual from Kubota but , you can’t recognize anything it shows up all blurry. Can anyone help with this part number. I would like to see if I can get an aftermarket part .
Thanks for your help.

 

[North Idaho Wolfman]

There are 2 sensors for the accelerator, which one did you replace?

 

[Jens]

There are 2 sensors for the accelerator, which one did you replace?

View attachment 157143

I replaced part 160. Didn’t make a difference.

 

[North Idaho Wolfman]

Do you have the WSM (aka service manual)?

 

[Jens]

Do you have the WSM (aka service manual)?

I had bought one from Kubota but it’s not great. You send me the link to a much better one a while ago when my 4x4 wouldn’t engage. I would need the actual Kubota part number, so I can see if I can find an aftermarket part.

 

[North Idaho Wolfman]

Part #140
3P705-75590

 

[Jens]

Part #140
3P705-75590

Thank you! I just did a google search but I think my chances are pretty slim to find an aftermarket part. You seem to be quite knowledgeable about these tractors.
what would you do? Would you change out the this part for 1200$ or is there a way to find out if this is indeed the faulty part. There are no codes showing on the dash.

 

[North Idaho Wolfman]

If you take it to a dealer they can read it with their computer and narrow it down.
And that's got to be less than just throwing parts at it and hoping you get it right.

 

[Jens]

If you take it to a dealer they can read it with their computer and narrow it down.
And that's got to be less than just throwing parts at it and hoping you get it right.

Thank you your help is much appreciated ! I guess that’s what I have to do then.