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Re: Case 644 loader repairs
Posted: Fri Dec 30, 2022 2:56 pm
by Eugen
Well, the more I think about it, the more I think I'll go with the u-cup seal instead of the original wiper plus o-ring. It's a little more expensive but should provide a stronger seal for a longer time, I think. There are two u-cup type seals I have identified to fit properly, one is loaded itself with an o-ring, the other is a simple u-cup seal. Difference in price is less than two dollars, but still I think the o-ring loaded u-cup seal is probably overkill for this application.
Re: Case 644 loader repairs
Posted: Fri Dec 30, 2022 7:12 pm
by Eugen
Guys, how would you fix this poor out of round and stretched rod end?
Re: Case 644 loader repairs
Posted: Fri Dec 30, 2022 7:25 pm
by Spike188
Either ream and press fit a bronze bushing or cut the rod end off and replace.
Re: Case 644 loader repairs
Posted: Fri Dec 30, 2022 7:29 pm
by Eugen
Spike188 wrote: ↑Fri Dec 30, 2022 7:25 pm
Either ream and press fit a bronze bushing or cut the rod end off and replace.
Thank you! The bushing seems a little more fit for my skills.
Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 6:45 am
by DavidBarkey
How much out of round is it ? How wide is it ? What is the pin size?
Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 8:33 am
by Eugen
DavidBarkey wrote: ↑Sat Dec 31, 2022 6:45 am
How much out of round is it ? How wide is it ? What is the pin size?
Oh sorry, forgot to give those details. It's a 3/4" pin, about 1.5" wide, and 1/4" thick the wall of the tube. When the pin is inside it has free play in all directions, as much as 3/42 on one side, so the hole is stretched too, not only out of round.
Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 9:13 am
by DavidBarkey
Eugen wrote: ↑Sat Dec 31, 2022 8:33 am
DavidBarkey wrote: ↑Sat Dec 31, 2022 6:45 am
How much out of round is it ? How wide is it ? What is the pin size?
Oh sorry, forgot to give those details. It's a 3/4" pin, about 1.5" wide, and 1/4" thick the wall of the tube. When the pin is inside it has free play in all directions, as much as 3/42 on one side, so the hole is stretched too, not only out of round.
I have a boring head for the mill to true it up . But I would lay beads of weld around it first . That will add material for what you will be removing and help shrink the bore . Grab 3/4" ID - 7/8" OD oil light bronze bushings from PA . I have a lot of old tubing to cover the shaft while welding if you need .
Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 10:08 am
by Jancoe
The backhoe on my 6018 has seen alot of use before I got it. I can't wait for the day to take all the slop out of the cylinder ends and pivot points. I had planned on drilling them all out and bronze bush then ream. Mine are all 3/4 pins on the amerequip bh. I need to pick up a reamer set and add this to the list of things to do.
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Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 10:28 am
by Eugen
Thanks for the offer
@DavidBarkey , I was thinking of a simple fix like fill up with the welder on the inside and then drill with 3/4 bit. I wish I had a slightly smaller bit than 3/4 to finish up with the reamer. My concern about drilling with the 3/4 bit is that the pin will have too much play. Using a bushing solves that problem, you and
@Spike188 are a few steps ahead of me, it shows who's got real experience fixing these things.
Now, on the subject of bushing. The rest of the machine is steel on steel. It feels a little too fancy to use a bronze bushing here. If it lasts another 20 years maybe a steel bushing is just fine.
@Jancoe , there's a really bad shape d100 backhoe waiting for me too. That'll be fun!
Re: Case 644 loader repairs
Posted: Sat Dec 31, 2022 10:40 am
by DavidBarkey
Eugen wrote: ↑Sat Dec 31, 2022 10:28 am
Thanks for the offer @DavidBarkey , I was thinking of a simple fix like fill up with the welder on the inside and then drill with 3/4 bit. I wish I had a slightly smaller bit than 3/4 to finish up with the reamer. My concern about drilling with the 3/4 bit is that the pin will have too much play. Using a bushing solves that problem, you and @Spike188 are a few steps ahead of me, it shows who's got real experience fixing these things.
Now, on the subject of bushing. The rest of the machine is steel on steel. It feels a little too fancy to use a bronze bushing here. If it lasts another 20 years maybe a steel bushing is just fine.
@Jancoe , there's a really bad shape d100 backhoe waiting for me too. That'll be fun!
With a hole that small and long it is easier to weld up the outside and the true up the bore for bushings.