59 961 Hyd Lift Cover Rebuild Guidance Request

(quoted from post at 22:55:24 05/03/19) Gentlemen, got a 1959 Ford 961 Diesel. My hydraulics suck. Bought a Lift Cover Gasket/O-ring kit from YT.
The area of interest is:
Specifically, Ford Shop Manual page 389, 3. Lift Cover, B. Disassembly, Paragraph 3
Or, FO-20, page 126, Paragraph 313

Here are my questions: Since I do not have "Remover and Replacer NCA-997" to remove the check valve seat, can I get some ideas on how to remove this item? All thread with thick washers and a nut to press it out? Anybody know the thread pitch and diameter of the hole in the check valve seat? Is it even worth the effort to take this out to replace one O-ring?

Basically, if you have removed your check valve seat, what method did you use and was it successful.

So far, the parts I have removed look fine but the check valve itself has wear marks from the check valve spring.

Thank you for your time.

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(quoted from post at 09:55:13 05/04/19) The Bobbing or hiccupping description in the books most closely describes my hyd. problem. If the hyd. picks up anything they bleed back down and you can watch the lift arms bobbing up and down.

Fluid is leaking around the piston. When I removed the piston the leather seal was not there only the rubber O-ring. The piston fell out of the cylinder. The cylinder bore looks, I think, very good. No scratches/cracks to be seen. Likewise the piston also looks fine. No scratches/cracks. I feel confident using the new piston O-ring and leather seal that came with the lift cover kit will fix the leaking problem.

Since I am in the neighborhood I would very much love to replace as many O-rings as possible and as many worn parts as I can. For example the O-ring (no.19) around the check valve seat, (which prompted my original question), and the check valve itself (no.18). The steel ball check valve has rings around it from the spring which at first looks like cracks. You can catch your fingernail on them.

Thanks JMOR. Sorry for the vagueness. I hope this helps. If I can provide any other information let me know. I appreciate your time and expertise.

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Now that would suck.

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(quoted from post at 10:50:49 05/04/19) See JMOR! This is why you get paid the big bucks!

Thank you for the picture. I will begin scrounging up the materials to make a puller ASAP. Can you please give me the size of the bolt you used? It looks as if you added more threads with a die. I can do that also. Is it 1/4-28?

To be fair and honest I am only guessing that the spring was butting up against the check valve because of the rings on the check valve. When I removed the check valve pilot it gave way quickly and fell on the floor with the spring, spring guide and check valve, so I was unable to see how it was assembled. Was very glad I found all of it too.

Based on your picture the rings on the check valve may be from the valve seat. Regardless, as always, you've been a huge help.

Thank you so much. Will be posting back ASAP.

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