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Re: Case 644 lift and bucket cylinders overhaul

Posted: Thu Aug 31, 2023 4:54 pm
by Spike188
@Eugen
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This is the method I used for breaking the nut loose on this shaft. The clevis end is clamped in the vise. An open end wrench with a cheater pipe extension slipped over it and drawn down on.

Re: Case 644 lift and bucket cylinders overhaul

Posted: Thu Aug 31, 2023 6:33 pm
by Eugen
Thank you Eugene! I admit not using wrenches as much as sockets. I don't know why, a habit perhaps. If there's enough clearance I always reach out to sockets and ratchet or beaker bar. 🤷‍♂️

Re: Case 644 lift and bucket cylinders overhaul

Posted: Fri Sep 01, 2023 5:28 pm
by Eugen
Back to garden tractors.

The rod's out.

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Re: Case 644 lift and bucket cylinders overhaul

Posted: Fri Sep 01, 2023 5:45 pm
by Eugen
Gland and piston size difference.

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Btw the seals were in really bad shape.

Re: Case 644 lift and bucket cylinders overhaul

Posted: Fri Sep 01, 2023 7:54 pm
by Eugen
The main rod seal inside the gland was originally an o-ring plus backup ring. I chose to replace that with a u seal of appropriate size.
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It provides a superior seal and lasts longer. A bit tricky to install without that special tool, but it can be done. This is what it looks like inside the gland.

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The cylinder is assembled once again, with plenty of HD grease around the retaining rings of the gland.

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Re: Case 644 lift and bucket cylinders overhaul

Posted: Sat Sep 02, 2023 1:31 pm
by Eugen
Re-installing the loader valve involves quite a bit of fiddling. No matter what I do there's oil spill. :109:

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This tractor needs an engine.

Re: Case 644 lift and bucket cylinders overhaul

Posted: Sat Sep 02, 2023 7:09 pm
by Eugen
With no functional loader I had to wrestle the engine in after using a jack to lift it.
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Only hooked up the pump bracket and called it a day. Some simple tasks take a long time.