Ford 801 hydraulic issues

[roger gregory]

Hello, I just purchased a Ford 801 that had sit 1.5 years. I have everything working except the 3-point lift. I pulled the top cover and installed a LVRK (repair kit with "o" rings) and freed up the small spring loaded control valve, I did not remove the larger valve next to the control valve. I removed the side cover and started the tractor, in the up position I do not get any fluid movement, in the down position I get a small stream of fluid (about the size of a #2 pencil) flowing from the back plate. What should I try next, I need your Help.

 

[JMOR]

(quoted from post at 15:17:50 12/14/18) Hello, I just purchased a Ford 801 that had sit 1.5 years. I have everything working except the 3-point lift. I pulled the top cover and installed a LVRK (repair kit with "o" rings) and freed up the small spring loaded control valve, I did not remove the larger valve next to the control valve. I removed the side cover and started the tractor, in the up position I do not get any fluid movement, in the down position I get a small stream of fluid (about the size of a #2 pencil) flowing from the back plate. What should I try next, I need your Help.

small spring loaded control valve, I did not remove the larger valve next to the control valve.". Such a poor description, that I can not directly relate to the parts that you are referring to. Point them out in a picture or by part # identifiers, please.

 

[roger gregory]

(reply to post at 12:23:02 12/14/18)

am sorry that I did not give enough detail. The part I freed up when I installed the LCRK was part 21 NCA913T the Hyd. valve lift control. The part I did not check was part 11 C9NN925A the Hyd. lift unload valve. If someone could please help, what do I need to do next.

 

[JMOR]

I am sorry that I did not give enough detail. The part I freed up when I installed the LCRK was part 21 NCA913T the Hyd. valve lift control. The part I did not check was part 11 C9NN925A the Hyd. lift unload valve. If someone could please help, what do I need to do next.[/quote]his is the unloader valve that you need to be sure is free to move. Only a low ~40 PSI is available to move it, so any restriction of movement & it does not function. Picture is NAA vs your 801, but very similar. Remove covering plug (make shift plug puller below for your 801) & then push valve spool out from opposite end.

 

[roger gregory]

(reply to post at 15:52:36 12/14/18)

hank you very much, I will pull the cover off on Monday and pull and free up the part. I will let you know how it works out.

 

[roger gregory]

(reply to post at 16:05:38 12/14/18)

pulled the cover and freed up the unloading valve (it has some damage), now when I start the engine the lift raises but will not lower until I kill the engine. Do I need to replace the unloading valve assembly?

 

[JMOR]

I pulled the cover and freed up the unloading valve (it has some damage), now when I start the engine the lift raises but will not lower until I kill the engine. Do I need to replace the unloading valve assembly?[/quote]ure sounds like it is now stuck in the opposite position as it was before. It should require very little finger pressure to move. If vertical, it will almost fall with gravity.

 

[Hobo,NC]

I have not looked the part number up I have not worked on a 801 the o-ring for a 600/850/860 is a -114...

Size Nominal Size Standard O-ring Size Metric O-ring Size
Only (Inches) (Inches) (millimeters)

AS 568A Actual Per AS 568 A Actual Per AS 568A
Uniform
Dash No. I.D. O.D. W. I.D. Tol. +/- W I.D. Tol. +/- W


-114 5/8 13/16 3/32 .612 .009 .103 15,54

 

[roger gregory]

(reply to post at 13:57:53 12/18/18)

hank all of you for the help. I replaced the damaged spool valve in the unloading assembly and the system is working well.

 

[JMOR]

Thank all of you for the help. I replaced the damaged spool valve in the unloading assembly and the system is working well.[/quote]lad to hear it.