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Old 02-23-2007, 10:58 PM   #9 (permalink)
dfkrug
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Join Date: Feb 2004
Location: NorCal
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Default Re: yet another custom backhoe subframe

Quote:
Originally Posted by joes_427_vette
I was thinking of the over axle braces also but would there be alot of flex in the length of steel involved. I guess it could also be tied into the upper axle mount plus the three point upper control. I want to make sure it is strong enough.
Flex is definitely bad. My over-the-axle braces are very hefty and
have almost no curve to them. Where there is a slight curve to get
around the axle housing, it is welded up double-thick to 1.25". I was
more concerned with where it attached to the channel frame. From
the operator's seat, I could see no apparent flex. I also used 12 total
bolt holes in the rear casting to support the lower section of the
subframe. My subframe prob weighs about 200# total. Looking at
what Woods did for this tractor, I see they avoided the whole issue
of wrapping around the axle by attaching to the bottom and top of the
rear casting. Easier to make, but I think mine will put less bending
moment on the middle of the tractor.

I am running my hoe at 2500psi and this tractor of about 5000-5500
lb is quite easily lifted and dragged by the digging action.
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