LOL again sales talk. Look at what it says on their website!The chain is exerting a point load on the lid rather than a distributed load which greatly increases the chance of buckling an inferior lid. Also, if the object is fixed in the ground you're not going to get the kind of momentum you can get with a chain connected to secure object because the tractor isn't able to move rearward before the load increases. Ted pulls on the lid both in line with the loader/lid and perpendicular to the lid.
But once again, EA is the only manufacturer regularly showing these sorts of tests. As Ted says in the video ...
"I've read on some grapples that look similar to this and it says no pulling allowed, no back dragging
allowed, and that's what a rake grapple's for so I don't really understand that. As far as we're concerned you can do pretty much do anything you want to with this."
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This also tells you exactly what would happen if you called them with a bent lid...
55 inch root rake grapple capable of clearing trees and roots with a compact tractor. Order today to get free shipping.
If you want to push or pry trees/stumps/roots/boulders and other solid and/or embedded objects, do it with the lower tines.
Root rake top lid is designed for raking loose material backwards. With the new wickeder design, you can even pull or rake harder than before, but it is not meant to be pushed on as in pushing on trees with the lid. The new design allows it to have 20% more pulling and raking force, but if pushed on it is possible to tweak the lid. We have had a few out of 1,000 that have been tweaked, and after receiving pictures of the tweaked lids, it is clear they are using the lid to push trees which is unintended use. The warranty remains in 100% effect for pulling and clamping, but not pushing on trees or boulders. Here are a few pictures showing lids that we have replaced from pushing on trees.