Re: Case D100 backhoe
Posted: Thu Mar 30, 2023 3:09 pm
Ok, I answered my own question: the LBH models are bushed as well, just with a larger diameter.
I'm surprised that they run so much stress on a bushing instead of a bearing.
I suppose I'll just roll with it.
I am updating my approach, though. The cross member with shackles is too wide to slide between the tires.
So I'll take my 1"x4" steel bar and with it laid flat, use it to build a transverse cross member that clamps permanently around the outer bearing bosses. It'll be welded to the bolt-on collars and hang about 1 1/4 inches below the bottom of the differential. I'm thinking that the 1x4 steel is strong enough to handle the hoe's weight and stresses without meaningful deflection. It'll permanently reduce my overall ground clearance by a couple inches, but I won't have to shorten my 3pt hitch cylinder, and the butt end of that will still be the lowest hanging thing under there.
Then the subframe's rails will hook onto and engage that cross member as they slide into place.
Same basic concept, except that the cross member becomes permanent, and only the rails get removed/installed with the hoe. I will have to do some bracing of the rails to keep then parallel and not twisting, but they were going to need that anyway.
In order to ensure good alignment, I'll have to weld up the entire cross member before I drill out and split the collars, and the collars will have to be line bored. I think I can JUST fit it on my lathe and do the line boring there. If not it'll be a real challenge.
So next I make a trip to pick up the steel, and figure out my contraption to machine the od of the axle housing. And start fabricating a shaft for line boring.
Bob
I'm surprised that they run so much stress on a bushing instead of a bearing.
I suppose I'll just roll with it.
I am updating my approach, though. The cross member with shackles is too wide to slide between the tires.
So I'll take my 1"x4" steel bar and with it laid flat, use it to build a transverse cross member that clamps permanently around the outer bearing bosses. It'll be welded to the bolt-on collars and hang about 1 1/4 inches below the bottom of the differential. I'm thinking that the 1x4 steel is strong enough to handle the hoe's weight and stresses without meaningful deflection. It'll permanently reduce my overall ground clearance by a couple inches, but I won't have to shorten my 3pt hitch cylinder, and the butt end of that will still be the lowest hanging thing under there.
Then the subframe's rails will hook onto and engage that cross member as they slide into place.
Same basic concept, except that the cross member becomes permanent, and only the rails get removed/installed with the hoe. I will have to do some bracing of the rails to keep then parallel and not twisting, but they were going to need that anyway.
In order to ensure good alignment, I'll have to weld up the entire cross member before I drill out and split the collars, and the collars will have to be line bored. I think I can JUST fit it on my lathe and do the line boring there. If not it'll be a real challenge.
So next I make a trip to pick up the steel, and figure out my contraption to machine the od of the axle housing. And start fabricating a shaft for line boring.
Bob