Ferguson Hydraulics ?

[harrisl]

I'm working with a Ferguson TO-20, 1950 vint.
The 3 point raised and will not lower with the finger lever. initally I thought it was due to icing but late found a broken draft control lever. Replaced it , the yoke, and the heavy spring that was also broken. To lower the lift I have to depress the draft control rod to override but then the control lever has no effect. I thought at first it required the rod to preload against the valve.
I have removed the quadrant and finger lever assembly but cannot see in the hole what it connects to or how.
I am hoping to avoid pulling the top cover off again the control valve connection to the fork is a bear.
Anybody got any ideas?
If anyone has a good schematic showing the connection between the finger lever shaft and what ever it connects to it would be a BIG help the dealer shop manuel I have is all but useless in this area.
e-mail to harrisl@zoominternet.net.
Thanks
Larry

 

[Soundguy]

the ferguson t*-20 hyds are nearly part for part identical to a ford 9n... pumps the same.. top cover has a very few differences that keep you from swapping parts.

hit the new holland web site, then do a parts search.. then pull up a 9n and go for the hyds section... an 8n cover will come up.. but has an inset pic of the 9n with the control fork... alternately, a master parts catalog for your tractor or a ford 9n will help with an exploded diagram.

if the oil will exhaust with manipulation, it's not a plugged valve, but rather an adjustment issue I'd bet.

sometimes you simply get ones that won't exhaust due to a plugged valve.. then you simply disassemble the pump and clen it up then clean the sump.

soundguy