Hi all,
I am having problem with Still mx30 sideloader.
The problem is :
1. Truck don't want to move.
2. Lifting function and all others related to hydraulic are very slow.

I did try to troubleshoot it's traction problem. I think those 2 are related.
While trying to find problem I check all contractors, main one and two other for forward-reverse. They are all ok. I get 80V on traction motor (measured to ground (-)). As this truck have thyristor for controlling speed of motor, and they are switching ground to motor, I continued there and foun that they are not firing. Did measure gate voltage and get 0V. I tried to replace little electronic that control thyristor (have two of those) but problem is still here.
What do you think what can be the problem. sensor related to both hydraulic and traction or main control electronic.
If you have any idea please post.

Forgot to mention that mechanic did mess around hydraulic and make mistake swapping some hoses.

Regards

P.S. if someone have manual for this truck please send it to me because I have one but not on english. Email in profile.