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8N Hydraulic lift


 
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Pete Gray
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PostPosted: Mon Mar 26, 2012 2:49 pm    Post subject: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Mon Mar 26, 2012 3:12 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Pete Gray wrote:
(quoted from post at 18:49:35 03/26/12) 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
High 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
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PostPosted: Tue Mar 27, 2012 7:30 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Tue Mar 27, 2012 9:24 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Tue Mar 27, 2012 12:14 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Tue Mar 27, 2012 12:59 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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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JMOR
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PostPosted: Wed Mar 28, 2012 4:46 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Pete Gray wrote:
(quoted from post at 16:14:26 03/27/12) 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
What 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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Pete Gray
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PostPosted: Wed Mar 28, 2012 2:55 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Wed Mar 28, 2012 3:20 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Pete Gray wrote:
(quoted from post at 18:55:41 03/28/12) 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?
If 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
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PostPosted: Sat Mar 31, 2012 5:58 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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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JMOR
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PostPosted: Sat Mar 31, 2012 6:34 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Pete Gray wrote:
(quoted from post at 09:58:02 03/31/12) 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
You 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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Bspauld
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PostPosted: Sat Mar 31, 2012 8:14 am    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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
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PostPosted: Sat Mar 31, 2012 3:47 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Thanks. I will keep that in mind until I can fix the problem. Pete Gray
 
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Pete Gray
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PostPosted: Sun Apr 01, 2012 3:02 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

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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JMOR
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PostPosted: Sun Apr 01, 2012 4:37 pm    Post subject: Re: 8N Hydraulic lift Reply to specific post Reply with quote

Pete Gray wrote:
(quoted from post at 19:02:26 04/01/12) 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.
Nope......just come back & visit. Very Happy
 
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