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53 Jubilee Hydraulics Nightmare!!!

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Jmcdonald70

05-14-2019 18:14:42




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I recently acquired a Jubilee. The lift was working when I picked up the tractor but then would begin to not lift after about 30 minutes. I figured I would repair the lift cover and replace the safety pressure valve. I done all this and while I was in there noticed the back pressure valve stuck. I cleaned it up and seemed to work. I put it all back together and now nothing works. Lol. I have tried priming at the pump with no air present. I have fluid at the top casting hole with lift cover removed. I have tried blowing air through the dipstick. One thing i noticed is with the tractor running and acorn nut removed at the back pressure valve i can push in on it and the arms will raise only with no weight. There is also a seepage of oil coming out where the acorn nut is located. The one thing I did not do while in there (slap in the face) was replace the cam follower pin. Not sure how to do that. Please help me to figure this out. It is driving me crazy. Thanks in advance!!

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JMOR

05-18-2019 13:33:01




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seeGood for you! Happy tractoring. :)



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Jmcdonald70

05-18-2019 10:54:26




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Thanks JMOR for your help. After much frustration and installing and removing the lift cover it finally works. I removed the unloader and cleaned like crazy with Emery cloth and used a pencil with it wrapped on it to hone out the inside. It moved ok before but with a little force. This time I got it like you said holding vertical and very slight pressure to cause it to move. This site has been a tremendous help along with JMOR. Once again, thanks.

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ford_650

05-18-2019 06:11:57




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to see

here is a youtube link on how to set it:

https://www.youtube.com/watch?v=0Yh1kYiYW2o



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JMOR

05-17-2019 09:02:08




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seeNo, not part of unloader, but the main control attached to the linkage by the adjustable turn buckle. Control spool position is set by this turnbuckle and if not correct, fluid is not routed correctly for LIFT, HOLD, LOWER.



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JMOR

05-17-2019 05:47:55




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seethey need to be free enough to need just a little more than gravity to make them move, if you are holding the unit vertically. If not too tight, then, other causes may be control spool not positioned properly for LIFT, leaks, back pressure too low.



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Jmcdonald70

05-17-2019 08:48:32




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-17-2019 05:47:55  
What would be the correct positioning of the control spool? Is this the part the unloader rest in?



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JMOR

05-15-2019 08:03:20




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seewithout acorn nut installed to stop it, oil will come out.



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Jmcdonald70

05-15-2019 08:52:51




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-15-2019 08:03:20  
That makes me feel much better. When I had the unloader out the plunger would move freely inside it. I guess it could be stuck somehow. I guess I will try the coat hanger trick then take this thing off for the fifth time. Thank you so much for helping me.



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JMOR

05-15-2019 07:40:32




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seeRecently, a fellow reported that he had used a bent coat hangar to insert into the hole where the unloader lives (next to the control valve) and feel for movement when LIFT is commanded. It should be all the way in when unloading and push the wire back out when LIFTING.



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Jmcdonald70

05-17-2019 05:27:02




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-15-2019 07:40:32  
I tried the wire trick and the unloader does not seem to move. Could it be the o ring is not exactly right cause when I had it out and cleaned it up it seemed to move freely?



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Jmcdonald70

05-15-2019 07:56:57




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-15-2019 07:40:32  
I shall try that when I get in this afternoon. So you think the oil coming through the back pressure valve is ok?



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JMOR

05-15-2019 07:14:24




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Sounds like a stuck unloader/bypass valve.



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Jmcdonald70

05-15-2019 07:31:52




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-15-2019 07:14:24  
I cleaned it up good while I had it apart. Any good way to test it?



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JMOR

05-15-2019 06:24:07




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Quoting Removed, click Modern View to seeNAA955-B. Do not expect to be available unless used. Why think bad?



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Jmcdonald70

05-15-2019 07:04:45




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to JMOR, 05-15-2019 06:24:07  
I cleaned and freed up the valve while I had it off the tractor. When I run the tractor trying to move control lever for lift arms they will not move but oil comes from where the acorn nut is. It is a pretty good stream. I can push in on the valve and the lift arms will come up only with no weight. This thing is driving me crazy.



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Jmcdonald70

05-15-2019 04:37:04




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 Re: 53 Jubilee Hydraulics Nightmare!!! in reply to Jmcdonald70, 05-14-2019 18:14:42  
Can the back pressure valve still be purchased and if so, what part number? I cannot find it anywhere on the internet and fear mine is shot. Thanks if anyone weighs in on this.



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