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Hydraulic lift problems


 
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bholtsclaw
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Joined: 05 Feb 2020
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PostPosted: Sat Jun 20, 2020 5:35 pm    Post subject: Hydraulic lift problems Reply to specific post Reply with quote

Had to take hydraulic pump out of 1950 Ford 8n and replace exhaust valve. Checked lift cover and adjustments and all seemed to be within specifications. Replaced pump and cover and added oil. Started tractor and moved quadrant to top. Lift arms came up about of expected travel and then stopped. I still had the inspection plate off the right side of the tractor and looked inside at the control arm. When I pulled the touch lever to the top the arm would travel forward and touch the front of the pump and then would jump rearwards approximately 1/2 inch causing the lift arms to stop at the point. The only thing I found wrong when inspecting the lift cover was a slightly worn cam. The follower pin was in excellent shape. The pump seemed to be working just fine. The position control lever was up. The draft control does not work at all. Anyone have an idea as to how to fix my problem?
 
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HCooke
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Joined: 29 Sep 2006
Posts: 5615
Location: Missouri

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PostPosted: Sun Jun 21, 2020 3:44 pm    Post subject: Re: Hydraulic lift problems Reply to specific post Reply with quote

There are four bolts fixing the quadrant lever to the tractor. Loodsen them and try moving the quadrant forward or backward and see if that
solves the problem with position control.

"The draft control does not work at all" - The main spring may be out of adjustment. Main spring is the big external spring on the back of
the left.
 
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Bill Crowell
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PostPosted: Mon Jun 22, 2020 9:06 am    Post subject: Re: Hydraulic lift problems Reply to specific post Reply with quote

I think you might want to see JMOR's explanation here:

https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=nboard&th=1059567
 
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bholtsclaw
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PostPosted: Mon Jun 22, 2020 9:27 am    Post subject: Re: Hydraulic lift problems Reply to specific post Reply with quote

CVPost-HCooke wrote:
(quoted from post at 16:44:15 06/21/20) There are four bolts fixing the quadrant lever to the tractor. Loodsen them and try moving the quadrant forward or backward and see if that
solves the problem with position control.

"The draft control does not work at all" - The main spring may be out of adjustment. Main spring is the big external spring on the back of
the left.

Took your advice and after adjusting to quadrant lever to the rear the lift came up to maximum. Draft control also works. Haven't tried lift under heavy load yet but feel that it is going to be OK. Thanks a bunch HCOOKE!
 
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