F2 variable speed lever adjustment

[pea_grower]

Seems on this F2 that I have no trouble slowing the ground speed with the lever in the cab, but speeding up is another story. Is it the idler adjustment on the variable speed drive belt, or could it be in the linkage going back to the hydraulic valve.

I'm thinking it is in the linkage. In watching it, linkage doesn't seem to move as much when pushed forward to increase the groundspeed, as it does in pulling it back to decrease ground speed. If it is the linkage, what do I need to adjust?

 

[jbp]

Definately the linkage to the control valve. The idler only keeps tension on the traction belt to keep it from slipping at its slowest speed.
Joe

 

[paul]

Seems I recall the whole valve stack is on a plate that moves,
and has way more adjustment than you will know what to do
with. Since the same lever does 2 functions, it gets a little
involved to get them just right.

Then each rod has a set screw to adjust individually.

Paul

 

[JMS/.MN]

paul talks about the stack being on a plate that moves....maybe slotted adjusting hole? I ran an F2 for about 20+ years....agree that acceleration was slower than deceleration- I think it is just the nature of the beast, belt takes time to tighten up, etc?...and ok...usually, when I needed to decelerate, it was for good reason, and I appreciated the quick response. Think about the load in each instance- decel is unloading..much easier...The system is mechanical, with the setscrews on the shafts that go to the valves. Maybe.....the decel side of the valve is different than the accel? Passage diameters? IDK. I"d sim[ply go with the idea that it takes more oooomph (technical term!) to speed up. Sure as heck works for my decrepit body!

 

[JMS/.MN]

Linkage is all mechanical, so forward/aft movement is the same. Regarding the idler pulley- set it per the op manual for proper tension....measure at the pulley sheaves for proper distance between them. Over time, pulleys do wear, sometimes unevenly....one might be "cupped" a bit.

 

[Anonymous-0]

Had the same trouble with our F2. Forum contributor tbran suggested I adjust the poppit valve inside the groundspeed spool. As I recall, I turned it in a quarter turn or so and the result was the acceleration improved significantly. Tom

 

[pea_grower]

we loosened the set screw and moved it out about 1/8 inch and made all the difference in the world.