Case 644 loader repairs

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Eugen Canada
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Case 644 loader repairs

Post by Eugen »

This loader has seen some work in the past. As evidence, look at the out of round hole at the main point where the loader is mounted on the frame.

The plate where the round hole is enlarged is about 1/8" thick. How would you fix this?

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Case 224, 444, 644, 680E
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Re: Case 644 loader repairs

Post by DavidBarkey »

I would make 2 new pieces out of 1/4" plate . 2" tall x the length and shape of the top with the hole predrilled in it . Cut out bad area so you have a nice fit and alignment . bevel edges and weld from both sides where possible . Alignment square to frame is crucial .
My 2 cents . you may keep the change
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Re: Case 644 loader repairs

Post by propane1 »

Daves idea is great. I would weld a short 1” or 2” pipe in it too, if there’s room. For the pin to go through. If there’s a pin that goes through.

Just a thought. :D

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Re: Case 644 loader repairs

Post by FUTZ »

I don't have a 600 series, but it looks to me that the shaft should rotate in the bushing in the boom, but it's seized and has twisted in the up-right frame. That's why it hogged it's way through the up-right. Therefore you should be able to pull the shaft out of the frame and weld a plate inside the the up-right. Of course, you have to un-seize the shaft and the boom bushing first.
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Re: Case 644 loader repairs

Post by Harry »

When I rebuilt my 646 loader arms the shaft was bent. I ended up cutting it in half because I couldn't drive it out with a sledgehammer and some heat.
So I figured I would increase the size of the shaft which then having to make larger mounting bushings and loader arm bushings. It took me a few long days in the shop drilling, cutting parts, fitting parts and welding parts. I had a lot of pics of this on the original site but when searching for them they were NLA. I also had them on an old lap top that crashed a few years ago. Always thought I should have put all these pics on a thumb drive, but never did.

I believe David has the right idea on how to go about fixing this worn out area. Not a quick job but well worth the effort down the road.

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1973 444, 1974 644, 1976 446, 1977 646, 1986 226
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Re: Case 644 loader repairs

Post by thebuildist »

I agree with David.

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Re: Case 644 loader repairs

Post by Eugen »

You guys are right on. There's a 3/4" rod through the two arms of the loader, the tower, and a pipe as wide as the tower. It was really stuck in that pipe. Banged at it with a mallet and a pushing rod and was barely able to get it about 6 inches out. Everything started to mushroom on the ends.


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That's when I knew it wasn't going to come out in one piece and the cutting disk came out.

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One inch rod and bushing would be nice for a replacement but I don't have that kind of material.
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Re: Case 644 loader repairs

Post by Harry »

Eugen wrote: Sat Sep 24, 2022 8:27 am You guys are right on. There's a 3/4" rod through the two arms of the loader, the tower, and a pipe as wide as the tower. It was really stuck in that pipe. Banged at it with a mallet and a pushing rod and was barely able to get it about 6 inches out. Everything started to mushroom on the ends.



47094042-043B-4F7F-B60E-272F948E6D96.jpeg

A470FD65-4BF6-45E2-A11B-0A17EE19CAEA.jpeg


That's when I knew it wasn't going to come out in one piece and the cutting disk came out.


FFD2A4CC-1699-46A5-8F5E-C0D0EFFA8FB8.jpeg

02A4CFA1-F904-4193-9B83-3D046961595C.jpeg

F47B1195-0459-4579-9144-5CBA586CDC74.jpeg


One inch rod and bushing would be nice for a replacement but I don't have that kind of material.
Eugen 1" is what I used to replace the 3/4". It was a bit difficult to get in all to fit in the tower. Once you weld in a collar it shrinks and then you have to resize it. Like I said a few long days in the shop, but it was well worth the effort.

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1973 444, 1974 644, 1976 446, 1977 646, 1986 226
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Re: Case 644 loader repairs

Post by Harry »

viewtopic.php?p=651#p651
I searched the CCIGT site and came up with this post I made awhile ago.

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Re: Case 644 loader repairs

Post by JSinMO »

Can I ask a possibility dumb question?

What is the purpose of the pipe between the towers? Isn’t the load from the arms all carried by the towers? If it is to keep the towers aligned with each other couldn’t box tubing or angle iron be welded in?
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