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Jerky NAA Hydraulics & Should it lift a big round bail??

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hzl6cm

12-01-2007 05:56:52




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The hydraulics for the three point hitch on my '53 Jubilee are very jerky when I raise the hitch until I move the control lever to almost the maximum lift and then it smooths out. It is kind of a headache when I am trying to just lift something a little bit. Also, how much should I be able to lift with the 3 point hitch? I moved to this tractor from a Farmall 450 and am finding that it has no where near the lifting power of the Farmall. I tried pulling a 4 cyl MGB motor with a boom and it wouldn't lift it and then I mounted a bail spike on it and tried to lift a large round bail, that was very dry, and it wouldn't lift it.
I just got the tractor and the guy I bought it from has been selling and working on these tractors for 50 years and he went through the tractor pretty well before I picked it up. He said he wasn't satisfied with the hydrualics so he went through them and installed all new seals, he still wasn't satisfied so he replaced the pump with a good pump from a 901. The three point hitch moves up very quickly and doesn't hardly leak down at all - last weekend I left my 7-foot blade up in the air on Thursday and on Sunday it was still up in the air.

Thanks.

Kevin

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hzl6cm

12-03-2007 11:43:10




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to WV8N, 12-01-2007 05:56:52  
Thanks everybody for their replies, I thought maybe the tractor was a little marginal for those big bales. Would my 961 be able to lift more weight with the trhee point hydrualics? (assuming I get it running again!!) I know the tractor weighs more and has a bigger motor but didn't know if the hydrualics were any different. Thanks

Kevin



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Old Ford Mechanic

12-01-2007 16:12:16




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to hzl6cm, 12-01-2007 05:56:52  
You have an internal leak somewhere.Lift piston,control valve,check valve,o-rings,ect.Also The used pump could still be weak.Be very careful lifting heavy loads with that tractor.You don't have enough machine to do the job you're asking of it.Its too lite in the front and the hydraulic system is marginal when in excellent condition to handle loads that heavy.



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JK-NY

12-01-2007 15:45:57




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to hzl6cm, 12-01-2007 05:56:52  
I have moved a 850-900# round bale with my 1954 NAA with a 3 pt. spear. It will lift one but isnt much good moving them as the front end wants to come up pretty easy and you have to steer with the brakes. Forget about going uphill at all , it comes up enough to drag and loose the bale.



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hzl6cm

12-01-2007 12:33:42




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to awhtx, 12-01-2007 05:56:52  
Thanks for the replies, yes it is a piston pump. A FEL may be different since the dual cylinders used to lift the FELs (unless you have an old one arm badit) probably have a larger total crossectional area than does the internal cylinder for the three point on my Jubilee. The front in did get light when when I was trying to lift the bale, I didn't want to throttle up the tractor too much since I was concerned about blowing hydrualic seals and don't have time to work on this tractor right now. That is why I wanted to go to the list and see what everybody else's experience is. I also have a 961 with a FEL powered by the tractor's hydraulics and the FEL seemed to lift quite a bit and lift it quickly. Unfortunately the tractor died a month ago, and I have been unable to get it started, so I can't try and lift a bale with it. I don't recall that the 3 point hydrualics lifted very smoothly with it though. Thanks for the help!

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old

12-01-2007 10:37:21




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to hzl6cm, 12-01-2007 05:56:52  
The 3 point should lift so much that the front wheels will come up and off the ground. Not a safe thing to do but it should do so. My 841 which has a loader on it will lift the front wheels off the ground with the 3 point with no problems BTDT a few times. Sounds like you have pump and control or piston problems in your 3 point. Also you are comparing a 34 HP tractor to a 55HP tractor on the 450 Farmall and yes it should/will lift a whole lot more then a Jubilee/NAA plus that 450 is almost twice as heavy

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Jerry/MT

12-01-2007 10:22:18




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 Re: Jerky NAA Hydraulics Should it lift a big round ba in reply to hzl6cm, 12-01-2007 05:56:52  
What do your round bales weigh? Around here, round bales weigh from 1400-2000 lbs. I don"t think an NAA would do more than about 1200 lb new. But I"m not positive.

The higher pump flow will give you better speed nut not necessary any more pressure because your relief valve is set to some value to protect the system. Do you hear the relief valve opening when you try to lift a load?

Since you couldn"t lift ~400 lb motor, your cylinder could be leaking or you relief valve could be stuck open.

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soundguy

12-01-2007 10:01:35




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to hzl6cm, 12-01-2007 05:56:52  
The pump from the 900 will be a 4gpm, if piston.. vs your 2.85gpm oem pump.

The 4gpm pumps do make enough power to lift heave loads. i have loaders on my 660 and 850 and I can lift 900-1200# bales on a fel using the engine mounted pump...

Soundguy



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awhtx

12-01-2007 08:17:10




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 Re: Jerky NAA Hydraulics Should it lift a big round bail?? in reply to hzl6cm, 12-01-2007 05:56:52  
It sounds to me like he didn't fix everything in the hydraulics. It should easily lift a small engine or a round bale.



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