I have a Farmtrac HST390. Sometimes the hydrostatic transmission shifter (Low, Neutral, Medium, High) actually moves from low to neutral when going downhill. This has happened while in 4WD with my cutter on the back. It has happened with and without the PTO running. It has happened at low engine speed and at high engine speeds (PTO engaged running brush hog).
I have a FEL but nothing in it and it is close to the ground. I am glad I have at least been taught safety precautions from other operators so that the outcome of my situation has been positive, other giving me a brief surprise. I was able to nail the brakes the times it has happened to stop it from taking off (luckily I keep the brakes locked going down steep hills so I didn't accidentally just hit one brake and roll it).
Has anyone else ever experienced this? At first I thought my leg was hitting the shifter. I tried to reproduce this by tapping on the shifter while going downhill and could not. The couple times it happened to me yesterday I am 95% sure I did not hit the shifter.
Does anyone have any idea what could be causing this? Could it be something simple like a spring that has lost tension, or something more serious like gears that are worn? The tractor has about 380 hours on it currently, and about 50 of those I have put on it. It has done this since I purchased it last year from a local tractor dealer.
Thanks for your input.
I have a FEL but nothing in it and it is close to the ground. I am glad I have at least been taught safety precautions from other operators so that the outcome of my situation has been positive, other giving me a brief surprise. I was able to nail the brakes the times it has happened to stop it from taking off (luckily I keep the brakes locked going down steep hills so I didn't accidentally just hit one brake and roll it).
Has anyone else ever experienced this? At first I thought my leg was hitting the shifter. I tried to reproduce this by tapping on the shifter while going downhill and could not. The couple times it happened to me yesterday I am 95% sure I did not hit the shifter.
Does anyone have any idea what could be causing this? Could it be something simple like a spring that has lost tension, or something more serious like gears that are worn? The tractor has about 380 hours on it currently, and about 50 of those I have put on it. It has done this since I purchased it last year from a local tractor dealer.
Thanks for your input.