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Restoration & Repair Tips Board

8N Hydraulic lift

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Author  [Modern View]
Pete Gray

03-26-2012 15:49:35
24.117.92.50



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1952 8N hydraulic lift will not come up high enough. It will lift all my implements, does not shudder. Seems to work ok but does not lift high enough. Any help or suggestions. Thanks Pete Gray




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JMOR

04-01-2012 17:37:04
72.190.9.193



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 Re: 8N Hydraulic lift in reply to Stuart, 03-26-2012 15:49:35  
Quoting Removed, click Modern View to seeNope......just come back & visit. :D



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JMOR

03-31-2012 07:34:10
72.190.9.193



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 Re: 8N Hydraulic lift in reply to tallman, 03-26-2012 15:49:35  
Quoting Removed, click Modern View to seeYou may want to remove the right side round inspection port & look inside. It is possible that some linkage is bent, resulting in the intake control valve being closed early (before full up).

In the attached picture, you see a pin sticking out the side of the control arm, extending over the mouth/edge of ram cylinder piston. In normal operation, at full lift, the ram piston will slightly emerge from this cylinder & push that pin/arm rearward, and the bottom end of tat arm then moves the intake control valve to closed position , thus halting fluid flow & further lift.
See if that all looks right in yours.



The control arm ahould be straight.



Not bent like this:

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Pete Gray

04-01-2012 16:02:26
24.117.92.50



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 Re: 8N Hydraulic lift in reply to JMOR, 03-31-2012 07:34:10  
Thanks for the advise. I really appreciate the explanation and photos. I have some other work that it pressing and want be able to tackle this immediately. I am not giving up just to many irons in the fire. I will fix this problem especially with the expert advice. Do I need to do anything with my question on the forum? This was my first time to use this forum.



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BSpauld

03-31-2012 09:14:43
205.188.116.208



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 Re: 8N Hydraulic lift in reply to Pete Gray, 03-26-2012 15:49:35  
I used a post hole digger on my Fergie once that wouldnt raise high enough. I had to hold the augar up a little (tip it back) and make a small hole with a shovel and set the tip in that and then back up. If I made any sense. But I did a lot of holes that way



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Pete Gray

03-31-2012 16:47:00
24.117.92.50



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 Re: 8N Hydraulic lift in reply to BSpauld, 03-31-2012 09:14:43  
Thanks. I will keep that in mind until I can fix the problem. Pete Gray



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JMOR

03-28-2012 16:20:41
72.190.9.193



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 Re: 8N Hydraulic lift in reply to Jon Hagen, 03-26-2012 15:49:35  
Quoting Removed, click Modern View to seeIf you did your measurements with tractor in DRAFT control mode, then the cam follower pin is not involved......if all the linkage is correct & correctly adjusted. Can you use your hands to lift the arms any higher when the hydraulics has them up as far as they will go? If the answer is yes, then put marks on quadrant mounting plate & tractor housing, so you can return it to curret position if necessary. Then loosen the 4 bolts in quadrant mounting plate & slide it toward the rear, tighten bolts, and see if it will now lift any higher.

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Pete Gray

03-31-2012 06:58:02
24.117.92.50



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 Re: 8N Hydraulic lift in reply to JMOR, 03-28-2012 16:20:41  
I moved the quadrant plate back approximately 1/8" (all that it could go) it helped about an 1". It still does not come up high enough. My Rhino RPHD post hole digger still needs to come up at least 20" to clear the ground. Any other suggestions would be greatly appreciated. Thanks for the other suggestions. Pete Gray



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Pete Gray

03-28-2012 15:55:41
24.117.92.50



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 Re: 8N Hydraulic lift in reply to Pete Gray, 03-26-2012 15:49:35  
Total travel is approximately 22"-23". I also tried the trick with the draft handle with no result. Whats next, the cam follower pin or cam?



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JMOR

03-28-2012 05:46:01
72.190.9.193



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 Re: 8N Hydraulic lift in reply to old, 03-26-2012 15:49:35  
Quoting Removed, click Modern View to seeWhat I said was "travel", that is, from lowest point to highest point, NOT from the ground. If you must measure 'from the ground', then measure with it lowered all the way (in DRAFT), then measure with it raised all the way & subtract the two measurements in order to obtain 'travel'.



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JMOR

03-26-2012 16:12:29
72.190.9.193



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 Re: 8N Hydraulic lift in reply to old, 03-26-2012 15:49:35  
Quoting Removed, click Modern View to seeHigh enough to suit you or not as high as when new? Total travel is 25.75 inches in draft control, generally about 2-3 inches less in Position control mode.



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Pete Gray

03-27-2012 08:30:16
24.117.92.50



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 Re: 8N Hydraulic lift in reply to JMOR, 03-26-2012 16:12:29  
Thanks for the information. I am going to my farm today and will measure. I got this tractor recently and the height has not changed. Thanks Pete



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soundguy

03-27-2012 10:24:07
173.107.58.226



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 Re: 8N Hydraulic lift in reply to Pete Gray, 03-27-2012 08:30:16  
one thing you can check, once it's lifted, len on the draft lever a bit and see if ti comes up more.. also may try to adjust the quadrant.. otherwise if not lifting as high as it should, it's likely a worn cam follower pin and / or cam.

soundguy



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Pete Gray

03-27-2012 13:14:26
24.117.92.50



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 Re: 8N Hydraulic lift in reply to soundguy, 03-27-2012 10:24:07  
Thanks for the help. The lift will come up approximately 24"-25" from the ground to center line of bushing. I will try the draft lever and see what happens. Thanks Pete



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soundguy

03-27-2012 13:59:13
107.41.164.252



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 Re: 8N Hydraulic lift in reply to Pete Gray, 03-27-2012 13:14:26  
if it's coming up 25" it's pretty much there. the last 3/4" is probably a lil wear on the follower pin. might take that up with a quad adjustment.. otherwise it's almos tnot worn enough to mess with.. yer only gonna gain 3/4 of an inch!



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