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Subject: 8n lift issue

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michael    Posted 09-09-2019 at 12:45:43 [URL] [DELETE]        [Reply] [Email]  
  • 8n lift issue
  • Im sure this one has been covered many times before. I just purchased a 48 8n. The hydralics would lift the finish mower about a foot when first started, after 30 minutes it would bleed down and would not raise. I thought this was a worn pump. I watched the youtube videos on the subject and then rebuilt the pump. first this i noticed was this looks like it was just done before but being there, I thought I would do it again for practice. I replaced both pump internals with a rebuild kit from capenters and replaced the lift pump piston and rings with the newer style. Filled it back up. The pump lifts all the way up without an implement on but will not budge the 4 ft finish mower. I can also stand on the lift arms and bring the lift back down while it is running- it will bring it back up right away. I am assuming I have a leak somewhere. I did take a look at the fluid tube leading to the lift piston and it was in good shape. Where should I start to look?

    Tim Daley(MI)    Posted 12-11-2019 at 12:52:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8n lift issue
  • Jack is right, you needed to post on the N-BOARD, not TOOLs. But, the best investment you can make with your 'new' 8N is to get the essential manuals. Next, you will get a much better info here in our HOW-TO's than any U-TOOB video. Anyone can post on utube and thus you will get many opinions. Did you perform the leak down test? No? Connect a load to the 3-pt. and start tractor, engage PTO, raise lift all the way to full quadrant, shut down, leave in raised position. Remove the L and R inspection covers. Look up into the top cover bottom where the cylinder and piston are and watch with a Mini-Mag if there is oil leaking down. Watch the implement and time how fast it drops. No oil dripping? Then lift should stay up for weeks, even months. Try this document from the How-To's and add to check the cam follower pin as part of the repair.


    Tim Daley(MI)

    Ron    Posted 04-04-2023 at 14:48:27 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8n lift issue
  • Thanks Tim for restating how to check for leak down in the 3 point. I have the same issue on my 41 9N.

    Jack - Iowa    Posted 09-09-2019 at 23:11:36 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8n lift issue
  • I'll not attempt to answer your question but you will have better success if you post this under the N Board forum. Look for N Board in the red heading.

    Good Luck,


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