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Ford 8N Hydraulic Top Lid Adjustments

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mrvnmatt
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PostPosted: Sat Jul 27, 2019 4:40 pm    Post subject: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

I am in need of some help. I have been researching and watching videos for months now. Also, I have replaced just about every part in the pump and the top lid. My hydraulics will go all the way up and back down, but no in-between. Plus they will hold up at the top for a long time. I just finished replacing the lift ram arm and trying to finely tune the quadrant adjustment.
I have followed both Zane's instructions, without his Jig. The Ford FO-4 Manual and another manual posted in these forums. I am obviously missing something or not understanding something.

Please help me.
 
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mrvnmatt
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PostPosted: Sat Jul 27, 2019 4:45 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Has anyone ever found a video of these adjustments? There are a lot of youtubers that post the start of taking it apart and not post the actual work. Just the end results of there tractor working.
 
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JMOR
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PostPosted: Sat Jul 27, 2019 4:46 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

mrvnmatt wrote:
(quoted from post at 20:40:50 07/27/19) I am in need of some help. I have been researching and watching videos for months now. Also, I have replaced just about every part in the pump and the top lid. My hydraulics will go all the way up and back down, but no in-between. Plus they will hold up at the top for a long time. I just finished replacing the lift ram arm and trying to finely tune the quadrant adjustment.
I have followed both Zane's instructions, without his Jig. The Ford FO-4 Manual and another manual posted in these forums. I am obviously missing something or not understanding something.

Please help me.
have you selected Position control vs Draft control? How is cam and cam follower pin condition?
 
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mrvnmatt
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PostPosted: Sat Jul 27, 2019 4:48 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

I have it in position control (Draft control lever in up position) and the cam follower pin is brand new.
 
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mrvnmatt
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PostPosted: Sat Jul 27, 2019 4:55 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

I have replaced the Ram cylinder and piston. The piston is the new NAA Jubilee with two gaskets. The entire pump was dropped, cleaned, flushed, and every part and gasket except the actual housing was replaced. The plunger guide assembly is all new, along with the friction disc on the quadrant lever assembly.
 
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mrvnmatt
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PostPosted: Sat Jul 27, 2019 5:07 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

The only thing I can think of is that I am not making the correct adjustments to the draft and position control springs. I have contacted several mechanics and they want $700 and up just to make adjustments.
 
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mrvnmatt
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PostPosted: Sat Jul 27, 2019 5:13 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Here is my previous conversation looking for help:

https://forums.yesterdaystractors.com/viewtopic.php?t=1398077&highlight=
 
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JMOR
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PostPosted: Sat Jul 27, 2019 11:48 pm    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

mrvnmatt wrote:
(quoted from post at 21:13:01 07/27/19) Here is my previous conversation looking for help:

https://forums.yesterdaystractors.com/viewtopic.php?t=1398077&highlight=
My long distance, not there, thinking is that you are never really in Position control. In position control, the swivel must be free to travel between points marked C and D and NOT contact either one. Further, points marked A and B must be in firm contact, thru out lift travel. A bent draft control link assy will up set this and outside of direct side by side comparison with a known good assy, the "bend" is really not detectable.





 
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mrvnmatt
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PostPosted: Sun Jul 28, 2019 6:11 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Thank you for the break down and pic s. I do know that the arm does not contact the position control spring when in position control. There is always play in the arm whether in draft control or position control. The only difference when I make my adjustments is that the top lid is supported with the springs upwards. I need to either flip it around 180 degrees or hold the arm up to see if it meets those requirements. Again, thank you for the help. I am new to mechanical work and really want to learn.
 
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JMOR
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PostPosted: Sun Jul 28, 2019 7:00 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

mrvnmatt wrote:
(quoted from post at 10:11:50 07/28/19) Thank you for the break down and pic s. I do know that the arm does not contact the position control spring when in position control. There is always play in the arm whether in draft control or position control. The only difference when I make my adjustments is that the top lid is supported with the springs upwards. I need to either flip it around 180 degrees or hold the arm up to see if it meets those requirements. Again, thank you for the help. I am new to mechanical work and really want to learn.
In normal operation, the control arm is being pushed rearward by the spring behind the pump intake control valve, so when adjusting, you need to simulate this with hand pressure or maybe gravity, if very free to move.
 
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mrvnmatt
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PostPosted: Sun Aug 04, 2019 7:19 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Hello Everyone,
I am looking to see if there is anyone that has Zane's Jig Thang, that would be willing to help me with it. Please contact me at "m r v n m a t t @ y a h o o . c o m" minus all of the spaces between the characters.
 
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mrvnmatt
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PostPosted: Sun Aug 04, 2019 7:23 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

JMOR,
Your advice is greatly appreciated, but either I am not doing it right or I am missing something (like a step). I am going to focus on getting one of the gauges or jig's. I have been going to every antique store and estate sale lately. Plus, I have been doing a lot of research to locate one.



 
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mrvnmatt
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PostPosted: Sun Aug 04, 2019 7:29 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Does anyone have the measurements for the second part of Zane's Jig Thang? Or was their only one piece?



 
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Shane007
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PostPosted: Sun Aug 04, 2019 8:07 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

I struggled with this myself. If the service instructions for adjusting the lift are followed (without jig) , the lift will work properly but may not be perfectly adjusted. I agree that the position control is way out of adjustment or it's not allowed to go into position control for some issue.
 
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mrvnmatt
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PostPosted: Sun Aug 04, 2019 8:14 am    Post subject: Re: Ford 8N Hydraulic Top Lid Adjustments Reply to specific post Reply with quote

Shane007 wrote:
(quoted from post at 09:07:25 08/04/19) I struggled with this myself. If the service instructions for adjusting the lift are followed (without jig) , the lift will work properly but may not be perfectly adjusted. I agree that the position control is way out of adjustment or it's not allowed to go into position control for some issue.

I think my main problem is that I am not very handy when it comes to vehicles and tractors. I even went as far as to get the framing square and caliper to do the adjustments with another set of instructions that I found. Still not getting full operation. So, while I am saving money to either buy a gauge/jig or take it to Macon GA to have a mechanic to do the work.
 
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