3940 HST has forward but no back

Bryan Perry · May 12, 2009

I have a 3940 HST and while moving from one pasture to another down the road I had the cruise lever on and when I disengaged it I had forward pedal but no back. The reverse pedal stopped working or almost it has a slight back but almost none. I can take the forward pedal and go forward or if I pull it all the way back it will go in reverse. They do not feel equal. It did this once before and it happened about the 50hr service. When I dropped off at the dealer it was fixed and serviced in a couple of hours. Should have asked what it was. It currently has 92 hours. Anyone with any Ideas?

Thanks Bryan Perry

trac · May 13, 2009

Mr. Perry,
I believe I know what your problem is. In selling tractors like yours in another color, Long 390 HST, The F/R Interlock link would bend under your HST pedals. Replace this part and with proper adjustment should cure the problem. Hope this helps . Gary