Toplink Top link attachment for maximum raised height?

[SPYDERLK]

Sorry Larry, you're both wrong. Even though it's a silly argument - because lift is performed by the lower arms anyway - you can get the top of the implement A-frame farther from the ground one when the tractor end of the adjustible toplink is in the top hole and the implement end is in the bottom hole. The angle of the implement itself is arbitrary, because the length of the toplink is variable.

Think about it. Your way - tractor bottom and implement top - can still be improved upon by at least another inch. You gain an inch from the ground going from the tractor bottom hole to the tractor top hole. On the implement end you can lift the A-frame an inch higher by using the lower hole instead of the upper.

But this is arguing just for the sake of arguing. Back to the original poster's question, achieving max height in the carry position is less important than getting the toplink as close to parallel (with the lower lift arms) as you can when the implement is in the working position. Don't go for height - go for parallel (or horizontal as I wrote above).

//greg//

No. It happens automatically as you raise it. The back of the implement pivots high as you raise to max height. This happens because the toplink reaches an extreme angle wrt to the lift direction. The top implement point is pulled toward the tractor and is restricted in rising even as the lift arms force it upward. This causes the back of the implement to kick up.

 

[greg_g]

This causes the back of the implement to kick up.

I'm betting you're just basing this argument upon watching what your specific configuration does. You're not looking at it as a matter of geometry. As I suggested before, your argument is directly related to the length of the toplink - not to what hole it might be pinned to.

But can you at least agree that hole selection should be based upon gettin' the toplink parallel with the lower lift arms in the work position - and not how high anything goes in the carry position?

//greg//

 

[SPYDERLK]

Greg, From the standpoint that the top link could become angled straight up during lift and thereby be holding the implement down, you are right. Ive never seen it happen, but if it did, I would lengthen the link such that the lift arms did not stall. I cant imagine this being an optimum arrangement for use, but it will produce the highest lift since the lift arms will lift the implement front as high as ever and the back will be kicked up significantly.
I agree about it being best to keep 3pt arms parallel. This lets you lift the implement straight up without pivoting it wrt the tractor. This allows you to maintain full hydraulic lift capacity regardless of how far back from the lift eyes the weight is concentrated. The apparent leverage is thus borne by the tractor instead of the hydraulic arms.
When using a boom pole unconventional toplink configurations can be a real benefit in getting the type of lift characteristic you need.
Larry