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Restoration & Repair Tips Board

Backhoe Bushing Boondoggle - Advice needed!

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john_bud

03-09-2006 08:44:34




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Hi!

I am redoing the bushings and pins in a Ford 723 backhoe. First off, I am slowly getting the bushings out with the old heat and hammer method, are there any tips on getting them out easier?

Next, and more importantly, there is damage to the bushing mounts on the bucket, dipper stick and boom. (I won"t even get into the pivot having washers welded on to hold the pin in! I really could slap that person around...) On the bucket, it must have been run without a bushing for a while as the holes are really bad wallered out. There is only a small segment in the center where the ID is about right for a new bushing. The outside edges in places are about 1/8 inch too big. I was thinking about putting in a new bushing and the filling the gaps with braze. Good idea, stupid idea? Got a better idea? I"m all ears!! I know, in 10-20 years, someone is going to be calling me an idiot.

On the dipper stick and boom the problem is the same, but the cause is different. I looks like someone used a cutting torch on the bushings and cut into the tube that holds the bushing. These are only bad in a few places and may even be ok to just slip in a new bushing.

Last, there is extra plate steel welded onto the boom and dipper stick. Quite a lot in fact, every side has been over plated with 3/8th. There are a couple issues with it. It really makes the tractor nose light. Should I just put up with it or cut it off and fix any hidden cracks/damage? Next, the cylinder bushings on the top of the boom (actuates the dipper stick) have been covered up by the plate. They are real loose and have to be replaced. I have a hole saw, but how to pilot it? The pin is 1.5", bushing is 3/16 wall.

Thanks!
jb

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Dennis/Ohio

03-12-2006 12:27:31




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 Re: Backhoe Bushing Boondoggle - Advice needed! in reply to john_bud, 03-09-2006 08:44:34  
Hello,
On my Case I ran beads of weld inside the bushings to shrink the bushing for removal. Best, Dennis..... ..



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JMS/MN

03-09-2006 12:35:09




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 Re: Backhoe Bushing Boondoggle - Advice needed! in reply to john_bud, 03-09-2006 08:44:34  
I bought a mid-70s Ford Model 4500 hoe a few years ago- similar problem with bushings. Had a local welding shop replace them. Parts are still available from NH- replace them before wallowing out, still able to fix after that, but any good shop can do that work. Plating was done because of weakness in the boom and stick- leave it there. Can redo bushings with it in place. Bought mine for about 6 grand, spent a few hundred on bushings and pins, another 400 for new hoses, front axle bushings, will be good until my kids wear it out! Nose light?- does it have a bucket in front? Mine does, but never a light problem. Fill the front tires with fluid, or add weights if you have no front bucket.

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john_bud

03-09-2006 19:52:32




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 Re: Backhoe Bushing Boondoggle - Advice needed! in reply to JMS/MN, 03-09-2006 12:35:09  
JSM,

Yeah, it has the 712 loader with a pretty good size bucket - maybe 3/4 yard? It's 72" wide and 34" tall. I added a 1/2x6 hardened bolt on cutting edge to it, so it is probably in the 550 pound range. With the front bucket off and the boom out, I was able to pick the front tires off the ground by sitting on the boom. With the bucket on, it's not that bad, but still light. I'll have to dig with the front bucket full of dirt!

Made progress on the stuck bushings today and have most of them out. Used a LOT of ox/ac, many swings with the sledge and more than one cuss word...

jb

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