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Hydraulic pump operation

W

Wingman2

Member
So my 3 point hitch arms go up, but not down.on my new to me 9n.
So this is what I did today. Dumped all the hydraulic oil out of transmission,hydraulic pump, and differential. Went to tractor supply, got the cheapest hydraulic oil they had ,2 gallon bottle. Dumped that in, then added about 3 gallons of kerosene.started the tractor, went up and down the driveway a couple times, then parked it, and left the run, worked the lift control lever up and down, arm's still didn't go down.removed the side inspection cover, and the arm's decided to go down.
I worked the lever up and down a dozen times, watched the oil churning around in the tractor.
Going to leave the oil mix in the tractor for the weekend. Will start the tractor up and work the lift several times over the weekend.then drain it out, and refill with a good hydraulic oil, and see how it goes.
 
Do you have any weight on the arms. My 3 point works great, but when there is no load on it, down is pretty slow.
 
Lots of tactors will be slow or not at all when there is no weight on the arms. Try standing on them when you let them down and see what happens and report back. I'll guess they will drop with the weight on them.
 
No weight on arms, they go up and down
find now . The oil that was in the tractor was full of water and rusty, milky
Looking. Will let you know when I put the Mobil hydraulic oil in an start it up
Thanks for the reply.
 
(quoted from post at 02:19:16 09/16/23) No weight on arms, they go up and down
find now . The oil that was in the tractor was full of water and rusty, milky
Looking. Will let you know when I put the Mobil hydraulic oil in an start it up
Thanks for the reply.
Click to expand...

I wouldn't have guessed that just changing the fluid would fix something like that. Almost always if the fluid is so bad that it's causing problems the damage has been done.
 
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