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Harry Ferguson Tractors Discussion Forum
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Re: Hydraulic pump check valve?

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Jason S.

09-12-2013 19:05:39
174.237.41.136



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Is the cork friction disc still there at the control lever? When was the last time the lift was adjusted? Is the spring that goes from the control valve fork to the lift cylinder still there and not broken?




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Lester M

09-13-2013 05:37:38
76.248.68.64



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 Re: Hydraulic pump check valve? in reply to Jason S., 09-12-2013 19:05:39  
The lift lever works fine and all the linkage is in the proper place. The spring is still attached. While looking thru the inspection hole I can see the control valve is working properly. When I use the lever to raise the lift arms (with a load on them)I can see the linkage move the control valve out to the neutral position. I can manually pull the control linkage and move the control valve back into the pump and then the lift works properly. There is back pressure on the control valve. That is why I was wondering if the relief/check valve might be stuck open.

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Jason S.

09-13-2013 06:32:54
174.237.41.136



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 Re: Hydraulic pump check valve? in reply to Lester M, 09-13-2013 05:37:38  
No, if the relief valve was stuck open the arms wouldn"t lift or would lift very little because it wouldn"t have the pressure to lift them. If there isn"t anything mechanically wrong with it then you need to adjust the lift. Adjust the draft control spring and then adjust the control quadrant. The control fork is up against the end of the control lever, but if it gets out of adjustment then it allows play in the control fork which means play in the control valve. Do you need the procedure for adjusting the lift?

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Lester M

09-13-2013 07:43:52
76.248.68.64



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 Re: Hydraulic pump check valve? in reply to Jason S., 09-13-2013 06:32:54  
Thanks for the info. I can get the procedure for the adjustments. Will report back when I can get this done.



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