backhoe bushings

twb1960 · Jan 16, 2016

I have a 1965 Ford 4400 TLB. I recently had the backhoe bucket repaired and new pins made. I need new bushings for the dipstick tube and cylinder yoke. I bought McMaster Carr 58365K21 Self-Adjusting Spring Bushings -1/2" ID, 1-3/4" OD, 1-1/2" Long. I measure the dipstick tube and cylinder yoke bores before ordering, but thought the self adjusting part of the bushing would allow them to work, but the 1 3/4" Bushing OD is the smallest it gets when fully closed. Any ideas? I don't have a machine shop or mobile boring equipment. If I were to find a way to make the "self adjusting gap" wider by removing some material, think it would work? Not sure how I would do it, the bushing material feels hard. I could see a big reamer maybe working to increase the dipstick tube bore, but the cylinder yoke (not sure yoke is the best word) is very hard feeling.
Self Adjusting Spring Bushing

markct · Jan 16, 2016

So im a bit confused here, you say you measured the bores and selected these bushings but they are too big? So we had a measuring error? Or was the plan to squeeze them into a smaller bore and close up the id to fit tighter on the undersized worn pin?

twb1960 · Jan 16, 2016

When the welding shop repaired the bucket (the portion the pins go through) he also supplied new pins. The Mcmaster Carr item I chose gave dimensions, but I was not sure if the listed OD was "squeezed" or "normal". I really don't know how to describe the self adjusting bushing, but gave a url to them to see the line drawing. The bushings I ordered are thicker than the original ones. If I have a shop turn the bushing OD down about a 1/16" they might work as opposed to trying to bore the components receiving the bushings from the current 1 11/16 to 1 3/4. Sorry I can't give a clear explanation, but if you are able to look at the Mcmaster Carr url I think it will make sense. The bushings are 1 1/2 ID x 1 3/4 OD. The OD is a little big to fit in the bore I need to bush.

JMS/.MN · Jan 16, 2016

If you can"t take them to a machine shop, you could clamp them in a heavy portable (or anchored) vise on a drill press, use an extremely small end mill in the press chuck, piercing down into the internal gaps. Outside edges you could use a thin cutting wheel on a 4 inch hand grinder. Use the end mill in the internal areas first, where you have no access with the grinding wheel. If those areas get too wide, that"s ok, and the outside edges can be controlled by limiting how much you take off with the grinding wheel.

twb1960 · Jan 18, 2016

Good idea - I actually just cut out a small portion of the original segment and was able to insert it in the bore, but my ID ended up under the 1.5" ID needed for the pin. The original McMaster Carr spring bushing would work great if the OD was decreased (turned off) from 1.750 to about 1.695. Got an email off to Connex to see if they will sell me the size needed. Not sure if I mentioned it before, but the original bushings or what was left of them since the machine was made in 1965 were thin walled self adjusting spring bushings. The bushings I ordered are not thin walled. If the McMaster Carr bushings had half the thickness turned off, they would have the OD I need.

mj · Feb 2, 2016

Talk to your weldor (the one that did the bucket repair) and ask him for his advice.

backhoe bushings

twb1960

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markct

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twb1960

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JMS/.MN

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twb1960

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mj

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