WD/WD-45 Hydraulic Pump Questions

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   1. For all of the balls/seats, what is the best way to check them? Visual inspection, and then is there a good way to pressure test them individually?
2. Do you need to seat new balls to old seats (if I assume at least some of my old seats are okay)? EDIT: To clarify, using a hammer and drift... I know this needs to be done with new seats, but it's not clear with old seats/new balls.3. Is the scoring shown below in the bore for the valves/sleeves a lost cause, or can this knocked well enough to work with careful use of something like Scotch-Brite? One of the scores is just deep enough that I can catch it with my fingernail if I really try.

I know Mack always said on here to not buy the complete kit from AGCO as you really only need a handful of parts for most of these pumps.

Edited by wjohn - 18 Apr 2024 at 6:47pm

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wjohn Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Jan 2010 Location: KS Points: 1989	Post Options Post Reply Quote wjohn Report Post Thanks(1) Quote Reply Topic: WD/WD-45 Hydraulic Pump Questions Posted: 17 Apr 2024 at 10:40pm
	1. For all of the balls/seats, what is the best way to check them? Visual inspection, and then is there a good way to pressure test them individually? 2. Do you need to seat new balls to old seats (if I assume at least some of my old seats are okay)? EDIT: To clarify, using a hammer and drift... I know this needs to be done with new seats, but it's not clear with old seats/new balls. 3. Is the scoring shown below in the bore for the valves/sleeves a lost cause, or can this knocked well enough to work with careful use of something like Scotch-Brite? One of the scores is just deep enough that I can catch it with my fingernail if I really try. I know Mack always said on here to not buy the complete kit from AGCO as you really only need a handful of parts for most of these pumps. Edited by wjohn - 18 Apr 2024 at 6:47pm
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Allis dave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 May 2012 Location: Northern IN Points: 2916	Post Options Post Reply Quote Allis dave Report Post Thanks(0) Quote Reply Posted: 19 Apr 2024 at 8:10am
	Those do look scored, but I don't know how critical that is. As far as the seats. When I rebuilt my pump I had a lot of issues. I kept the old seats. Bought 2 sets of new balls. I put in one set of new balls and gave them each a good wack with the hammer and brass punch to seat them. Then I put in the 2nd set of balls incase I deformed the 1st set.