861 lift quit

Gmartin

Member
Using my '55 Ford 861 to mow some very heavy brush. Had an old 5ft. bush hog on with a stump jumper. In a few areas I would raise the mower and back in,then lower it and cut the brush in 2nd or 3rd gear. After about an hour the lift stopped working. It will not go up at all. I checked fluid level on dipstick by 3 point lever but it says to check with lift all the way up. Never had any problems with the lift in the last 3 years that I've owned it. Anyone have any easy things to check first? Any harm in adding hydraulic fluid to see if it makes a difference?
Thanks,
Gary
 
Well if you think about it and the dipstick when the lift is up and say it reads full then with it down does it at least read full?? If it does not read full when down then it is LOW. Or in other words when the lift is down it should read over full if it is in fact full. Of course another way to maybe check things is to put a pressure gauge on the system ans see if your getting hyd pressure. One like that can be a few things like the relief valve sticking open or the unloader valve stuck or the control valve sticking
 

Like old says, it should read well over full with the 3pt cylinder collapsed.

It shouldn't make any difference to your problem, but if your tractor is a '55, it's not an 861. '55 would be an 860. 861 would be '58 to '62
 
As the other mentioned, reading with all cyls extend is just there to see if thee is enough oil in the sump to extend any hyd cyl feeding off the sump,, and still leave oil to circulate.

Yes, the hyd sump has extra capacity over full if needed. It will actually hold almost 2g past full, but I wouldn't fill it that much unless you needed it for a huge single acting cylinder, or other external hyds, etc.
 
(quoted from post at 14:17:15 11/07/16) I think I have a 1955 861.

The hundred series (all models ended in a zero) were made from '55-'57 and the '01 series (all models ended in a 1) were made from late '57-'62. The hundred series serial numbers started at 1 and went up above 120000 before they finished the production run. Then the '01 series started serial numbers over at 1001 and went up above 130000, so any serial number between 1001 and 120000 or so existed in both series, but in different years. If you have a tractor that is stamped with an 861 model number and a serial number that you think is a 1955 serial number then it is likely that it is really a late 1957 or a 1958, or possible an early 1959 serial number.
 
Thanks Old. What kind of pressure gauge would I get to check this and what plug to I remove? Never fooled with hydrolics, so I'm going to ask some really dumb questions probably.
Thanks,
 
Pressure gauge I have is 0-4000PSI and cost around $20. Just under the seat on the right hand side is a plate in the top of the plate is a pipe plug that is where you hook the pressure gauge to see how much pressure your getting.
 

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