Posted by TheOldHokie on January 27, 2013 at 07:42:44 from (108.22.203.170):
In Reply to: Bulldozer- weak axle posted by Bulldozer on January 26, 2013 at 18:40:18:
Bulldozer said: (quoted from post at 22:40:18 01/26/13) The estimated ~420# is the extra vertical static load applied at the hole in the axle through the king pin and bushing load path that the N series tractor could safely handle from accessories, etc.
The weight of the tire, wheel, splindle and any extra wheel weights do not contribute any gravity load to the center axle.
Since the axle is cast steel the material inherently has casting flaws (voids), which reduces the strength of the material compared to the same material being hot rolled, cold rolled or forged. However, the chances of the casting having a flaw in the region of maximum stress is rather remote ,but the allowable working load would be determined based on the void occuring in the worst possible spot, unless x-rayed.
I am no fan of loaders on N-series tractors BUT it seems odd that the factory engineers missed something that fundamental when they designed the Ford Industrial loader with a payload capacity of 1000#. Ford provided factory mounting kits for the 8N as well as the NAA, and Hundred series tractors mentioned in this brochure and all of those tractors used basically the same cast center axle. I guess this guy has no idea the danger he is in....
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