OK I watched the video and I used a small hose clamp to make a stop when the cab is lowered. Also clean and used a light grease to lube the slide.
That worked for a while and then it acted up again. Made up a new pipe and slide rod. Repaired the foot pedal, it was bent when the stop was set in the wrong place. I also had to add a return spring or else the throttle would not return.
I have a full weekend planned and will get back to you Sunday?
Don