Well despite the OLD thread, the same options for an electrical top link seem to be available and I'm looking through them. My only question is, would they stand up to pressures since hydraulics can compress a bit when extended (for good reason). Also would hate to miss out on a hydraulic solution with float valves on my 3 point. Its awesome on the FEL.
I saw a YouTube video just last night of a grapple with an electric operated cylinder to close the "lid". Lots of extreme forces on that top link application tho. dunno of any.
I don't know about an electric top link and doubt a simple actuator would be up to the task, however, there is something called Hydraulink.
It's basically an hydraulic top link that doesn't use any remotes. It allows you to adjust the length by simply opening a valve up top, pull or push the rod to the desired length and lock the valve. It stays in the position. It also has the ability to flow if one leaves the valve open.
Hydraulink Category 1 Toplink, Tractor Top Link Hydraulic Cylinders, HYDRAULINK CATEGORY 1 TOPLINK, HYDRAULINK TOP LINK CYLINDER Brand new,Hydraulink,HL101,
JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500
The forces on a toplink of even a CUT can be huge. It must endure jerking, vibration and dust. A manual toplink is simple and robust. An electric would be cumbersome, slow, fragile and weak.