Hydraulic top link

[used red MN]

Well it seems like you've got your hydraulics and lift arms working, but you're going to have to have a remote valve to utilize a hydraulic top link. I don't know how the hydraulics are setup on a 871 and if there is a port where you can add a factory remote valve or if you have a power beyond outlet where you can tap in a add a aftermarket spool valve?

m16ty, if you look at his reply 5 you’ll see he was thinking he could use the hydraulic top link in place of a nonworking 3 point to lift an implement.

 

[m16ty]

m16ty, if you look at his reply 5 you’ll see he was thinking he could use the hydraulic top link in place of a nonworking 3 point to lift an implement.

That won’t work either.

 

[Brown David]

Not a dumb question if you don't understand how the 3-point hitch components work together.

The three-point arms perform the actual lifting of the implements. A top link, both manual screw type or hydraulic type, only provides front to rear leveling an implement as it lengthens or shortens. It is a fixed point between the mast of an implement and its attaching point on the tractor. The shortening will tip the back of an implement up and lengthening it will tip the back down as the lifted implement pivots on the pins in the lift arms. It will not lift an implement off the ground, as the lift arms to, it maintains the distance from the tractor to the implement mast, so that when the arms lift the front of an implement the back comes up as the mast has to remain at the set distance from the tractor. You need working hydraulics to lift the implement, then a hydraulic toplink can level it during operation, compared to having to stop to make an adjustment when using a manual screw type top link, to get the most work out of something like a box blade.

Perfect explanation.

 

[jmcdaniel505]

No, the system lost pressure overnight and when it had pressure was only doing a half lift. I’m replacing o rings, etc under lift cover soon as suggested above. I will also soak the reservoir in diesel. I’d be happy to just have the lift working full range. I’ll deal with the top link later. Thanks for the suggestion.

 

[jmcdaniel505]

OK guys, I got the lift cover off and have a few questions. I’m guessing this pin that rides on the lift arm cam should not be notched?

 

[jmcdaniel505]

Better pic

 

[jmcdaniel505]

Pivot pin, got it!

 

[jmcdaniel505]

Providing an update. I rebuilt the lift cover components, replaced pivot pin, made adjustments. Filled and bled system. Hydraulics now working! Thanks all for your help.

 

[used red MN]

Thank you, the update is very much appreciated!