Fitted a pair of these to my 434 about a year ago and working very well. I've also fitted a pair to a friend's B414.
They come well wrapped and with the five ball bearing greased. I personally install the ball bearings without grease as it may hold brake debris and impact performance, but it is good that they are protected like this until ready for installation.
Also on the subject of protection, the actuators are painted. While good for protection, this coating needs to be removed from the friction faces before installation to stop brake disk contamination.
The only slight negative with all four actuators was one hole in the linkage was slightly under size and needed to be filed or reamed to size before the linkage pin would fit. This only takes a few moments to fix, but check the fit of the pins before installing as it is more difficult to fix once on the tractor.
Finally, at the time of writing these are less than half the price that I could find elsewhere. I'll be back...
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