3-point not "floating" on 850

[JB4310]

Your 3 pt does float, many of us wish we could have an option to prevent it or control down pressure but that is only available on much larger machines.

What I think you are experiencing is when your front end rises over the mounds it's making the blade angle more aggressive, that's why it's digging in.

You will need to manually adjust the blade height to compensate.

Rear blades are difficult to use and require some serious seat time to get efficient with, as you are now learning. Get a box blade they are much more forgiving and easier to use.

The only thing I do with my rear blade is clear snow from hard surfaces. The few times I tried doing dirt work I made a mess, put the box blade on and all was good.

JB.

 

[JCByrd24]

Taking a quick stab here...It seems the reason the float is not good when the front of the tractor goes up and down is because the forces involved aren't just up and down on the lift links, which is what floats nicely. With an implement on and well behind the tractor, the top link comes into play. When raised it's in tension, when lowered it's in compression. When the front end goes over a bump, the top link is pushed backwards forcing the rotation of the implement. The lower links of the implement can float up in reaction, but they can't move foward which would be the primary reaction, thus significant downward force is applied when the front end goes over a bump.

 

[SPYDERLK]

Thats what Im thinking. A toplink in a low mount point on the tractor will be angled upward [or not down as much]. Put that link in compression and it wont fight float.
larry

 

[LD1]

Taking a quick stab here...It seems the reason the float is not good when the front of the tractor goes up and down is because the forces involved aren't just up and down on the lift links, which is what floats nicely. With an implement on and well behind the tractor, the top link comes into play. When raised it's in tension, when lowered it's in compression. When the front end goes over a bump, the top link is pushed backwards forcing the rotation of the implement. The lower links of the implement can float up in reaction, but they can't move foward which would be the primary reaction, thus significant downward force is applied when the front end goes over a bump.

You hit the nail on the head right there.

Your neighbor is incorrect in telling you that the TL and lower links need to be parallel ALL the time. What that does is make your implement raise more level. In the case of going over a bump, the blade actually needs to rotate instead of trying to be raised straight up.

Lower the TL position on the tractor. This will make it rotate more through out its travel. It will also allow it to be raised higher than before. Which may come in handy. Like when getting the tractor stuck crossing a little ditch and the blade diggs in and wont go high enough. Or when loading on a trailer.