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Subject: 8N pump base

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Dave    Posted 09-05-2020 at 12:08:39 [URL] [DELETE]        [Reply] [Email]  
  • 8N pump base
  • I bought an 8N a couple years ago.It starts and runs. The three point hitch goes up and holds. Well I finally had a chance to hook up a bush hog and it wouldn't lift. Read up on everything and double checked. Did all the visual checks. Tore into it and found a crack in the pump base. It is located just above the intake control valve and the relief valve. (Bottom of the PTO shaft bushing.)
    Can this be TIG repaired or am I out of luck?

    Lynn Patrick    Posted 09-07-2020 at 07:26:12 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • Where are you located? I have a used complete pump I could part with in east Iowa.

    Dave    Posted 09-08-2020 at 11:48:47 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • I am near Clinton, Iowa. You can email me with info.Thanks for reply.

    Lynn Patrick    Posted 09-08-2020 at 12:21:58 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • email sent. Did you not get it?

    Dave    Posted 09-06-2020 at 11:59:58 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • When I bought the tractor at auction....they had it running and lift work normal(Went up and down fine). Fluid was normal. I had it stored inside for two years. It wasn't until I put a bush hog on it that it would not lift. I torn it down for inspection and that is when I found the crack. I would say I bought it that way.I ordered a new piston and cylinder before finding this. Has anyone had one TIG repaired? If not possible....I guess I am look for a pump.Thanks for info

    Dave    Posted 09-18-2020 at 13:57:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • Update....I was offered a hydraulic pump housing......but it was for a 2n. I am going to see a guy who TIG welds and see what he thinks.

    Tim Daley(MI)    Posted 09-06-2020 at 03:51:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N pump base
  • Yes, as JMOR said, cracked pump base was most likely caused from water getting into sump, freezing, then trying to run system. It may have been like that when you bought the tractor -did you inspect the system when you purchased from previous owner? What color is the hydraulic oil? If oil is a murky brown or whitish color, it is contaminated with water. Oil should be a translucent, honey-like color. You won't find a new base -nobody makes the pumps new anymore, but they do pop up all the time on ebay, rebuilt and as-is. Replacing the hydraulic system isn't a difficult task, just time consuming, and best to have a buddy help. Pulling the top cover requires a certain method so read your ESSENTIAL MANUALS first. I advise to plan on repairing with a new cylinder and piston and other parts in the system as well.


    Tim Daley(MI)

    TheOldHokie    Posted 09-06-2020 at 07:23:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N pump base
  • "You won't find a new base -nobody makes the pumps new anymore, but they do pop up all the time on ebay, rebuilt and as-is."

    Actually somebody does make new 8N hydraulic pumps. You will find close to a dozen new pumps listed on eBay right now.


    Tim Daley(MI)    Posted 09-06-2020 at 12:24:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N pump base
  • Should have said 'nobody makes a good pump' -have heard nothing but bad news for them -fit is wrong

    Dave    Posted 10-19-2020 at 18:59:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N pump base
  • Tim Daley(MI)or anyone.....Got a used pump(guaranteed to work....we'll see). Took it apart anyway....cleaned and inspected it. Rebuilt top cover. I read your article on hydraulic overhaul.....my question is....do I need a jig for alignment or is it a crap shoot to get it in and working correctly? Asking for a friend:)

    JMOR    Posted 09-05-2020 at 13:56:12 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N pump base
  • Can't say, yet. Most likely from freezing with water in the sump and if so, what you see may not be only crack. Take apart, thoroughly clean and inspect. Also, if it cracked into a valve bushing bore, that will also reduce the chance of successful repair.

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