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Ford Tractors Discussion Forum
Show Parts for Model:

Jubilee 3 pt lifting problem

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Jay in WA

12-26-2012 11:33:40
71.221.215.90



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The system seems to loose it prime. I've replaced the O rings on the manifold tubes and it still doesn't lift properly. It won't lift until the tractor runs for a few minutes and the pump growls when I raise the 3pt. It only lifts in the last 2 inches or so of moving the lift handle. Is there something internal to the hyd tank that's leaking and causing air to get into the system? It has the vane pump and it has the 2 gallons fluid in the hyd. reservoir.

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Kurt-NEPA

12-27-2012 07:22:58
70.44.245.96



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
That makes a big difference, Thanks Mark



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Kurt-NEPA

12-27-2012 03:31:59
70.44.245.96



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
I'm not a Jube/NAA guy, Buy I would think the hundred series manifold would fit the Jube/NAA 4 speed tranny and piston pump. The engine and 4 speed transmissions are the same on NAA's and 640.
This post was edited by Kurt-NEPA at 03:32:36 12/27/12.



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mhb@ufe

12-27-2012 05:29:25
24.39.22.34



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 Re: Jubilee 3 pt lifting problem in reply to Kurt-NEPA, 12-27-2012 03:31:59  
The NAA is very different as it has tubes that run back to the hydraulic section externally instead of internal tubes through the transmission like the 600.

Mark



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NoNewParts

12-27-2012 03:25:48
67.240.145.25



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
open the 'flow control' knob on the vane pump all the way

check the o-rings on the tubes front and rear again

check the tubes carefully for any pinholes, rust thru

bleed air by loosening the plug on the accessory plate under the seat

take out the test port plug (by the right floorboard), and plumb a
hose from there to the fill port. start the tractor and check flow and look for air bubbles

sometimes, the vane pumps are just worn out.

replacing it with a piston pump is then the way to go.

direct swap, but you will need

piston pump tubes for the NAA, which are getting very tough to find.

(your existing vane pump tubes won't work)

also, you will probably have to modify the oil pressure line

fitting on the side of the block, as the piston pump will hit

it when installing
This post was edited by NoNewParts at 03:29:54 12/27/12.

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ZANE

12-26-2012 18:03:34
98.83.20.252



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
I have a used piston pump for the NAA and up to the 6X tractors. I have the manifold too but it of the later than NAA models and won't work on the NAA.

What manifold will work with the NAA and piston pump????

Zane



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mhb@ufe

12-27-2012 06:04:39
24.39.22.34



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 Re: Jubilee 3 pt lifting problem in reply to ZANE, 12-26-2012 18:03:34  
Not sure if the link will work

Mark



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Kurt-NEPA

12-26-2012 15:29:05
70.44.245.96



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
Yep Old, I missed that. These old eyes aren't what they once were.

Jay. With a vane pump its harder to diagnose a suction side air leak. The only way I know is to use a rubber tipped air gun down the dip stick hole and use some low pressure air to force some oil up to the pump. If you lift improves, great. But if it goes back to the same old problem, after sitting overnight, you have a suction side leak.

If that is the case you have a problem, Parts are no longer available for the vane pumps. Two options 1) buy a used vane pump and cross your fingers, or 2) buy a newer piston pump and swap it. Again cross your fingers.

The new piston pumps are rebuild-able, so that route works, but the pumps are expensive. There are usually several listed on Ebay at any given time.

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old

12-26-2012 18:31:00
209.86.226.34



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 Re: Jubilee 3 pt lifting problem in reply to Kurt-NEPA, 12-26-2012 15:29:05  
That is why I have glasses made just for sitting here in front of the computer. LOL Yep had my eyes checked and was told my old glasses where fine for reading but in front of the computer I needed a special pair



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Kurt-NEPA

12-26-2012 13:26:31
70.44.245.96



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
It could be a number of things. When you say "It won't lift until the tractor runs for a few minutes" it sounds like a "Loss of Prime" issue. When you say "It only lifts in the last 2 inches or so of moving the lift handle" it sound like the cam follower pin is worn or the the linkage is out of adjustment.

Do you have the early square vane pump or the later round piston pump? If you have the later pump, the seal and shaft are replaceable and there is a good test to confirm a suction side leak (ie wobble shaft seal).

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old

12-26-2012 14:57:54
209.86.226.27



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 Re: Jubilee 3 pt lifting problem in reply to Kurt-NEPA, 12-26-2012 13:26:31  
Guess you missed it he said he has the vane pump which can be a problem in them self's



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mhb@ufe

12-26-2012 13:10:41
24.39.22.34



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
There is a seal between the drive gear and the pump that could be leaking air causing it to loose prime. It is common for the seal to wear a groove in the shaft as well so that would need repair as well as replacing the seal. As for the lifting only in the top 2 inches of travel, you should check the selector lever to make sure that is set for position control and not set to the draft control position.

Mark

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old

12-26-2012 11:38:46
209.86.226.34



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 Re: Jubilee 3 pt lifting problem in reply to Jay in WA, 12-26-2012 11:33:40  
Could have a number of things wrong. Cam follower pin bad can cause that from what I understand as will fluid that is to thick due to temps or incorrect fluid or a seal between the rear end or trans being bad and mixing the thick oil with the thin oil



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Jay in WA

12-27-2012 12:18:11
71.221.215.90



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 Re: Jubilee 3 pt lifting problem in reply to old, 12-26-2012 11:38:46  
Thanks everyone for the help with this. I did the compressed air test to the hyd dipstick tube and it lifted immediately. So it appears it's loosing prime. I got the O rings from a local Hyd shop and he inspected the tubes and said they were OK. I will do the test of hooking up a tube and looking for flow volume next. I have not opened up the pump to look at it. It works good enough now for snow plowing so I probably won't dig much into it till spring or it quits completely.

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