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3 point problem 2n

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bob govel

07-02-2001 10:03:41




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my problem is my three point works great for a while and fades in and out.It has layed around for a long time not in use so i have put new fluid in and have been trying to keep using it to see if a valve is hanging up. any ideas ?




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ZANE

07-02-2001 15:04:06




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 Re: 3 point problem 2n in reply to bob govel, 07-02-2001 10:03:41  
BEFORE DOING ANYTHING TO THE LIFT IT SHOULD FIRST BE INSPECTED FOR ANY INTERNAL LEAKAGE. GOOD ADJUSTMENT CAN BE DONE WITH A LEAK IN THE SYSTEM BUT FOR GOOD OPERATION AND IN ORDER TO TAKE FULL ADVANTAGE OF GOING INTO THE LIFT IT SHOULD BE DONE FIRST BEFORE ANYTHING ELSE IS DONE.

I think that you are probably having a combination of problems which is common to the 8N lift. One of the worst offenders is the cam follower pin which is what the position control receives it's input from. The other thing is to look for a leak in the sysyem @ the ram cylinder rings etc and the pressure relief valve. Also there could be a gasket leaking somewhere such as under the ram cylinder where it mates to the lift cover housing.
If you dicide to take the lift off to work on it be sure not to remove any bolt except for the ones around the outsides of the cover. If you should remove a bolt that has fine threads it will be from the inside pattern and you should put it back in the same hole it came from. You can remove them after the cover is on the work bench if it becomes necessary.

You should first take off the right hand inspection plate under the seat on the side of the lift housing.With an implement on the lift start the engine and with the lift in the up position look inside and see if their is oil leaking from the end of the lift ram cylinder.If their is only a slight drip this is normal.If their is a fairly steady stream this may be the trouble.If the oil is coming from somewhere else try to pin point its orign. If you find no appreciable leaks on top in your view then you may have a pressure relief valve leaking. It is located just under the pto shaft on the vertical back of the pump.Sorta shaped like a spark plug and an 11/16" box end wrench fits it. You can check it for leakage by first finding it with the engine off and then with the pump running and with a load and hot put your finger over the end of the relief valve and if it is leaking enough to be a problem you will be able to feel the oil push your finger off the end of the valve slightly.You can check it by washing it up and then soaping it real good with some dishwashing detergent and water and apply air to the end that goes into the pump. If it is leaking you should replace it with a new one. The part # used to be 8N638. Hope this will give you some starting places. Zane in Al.

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Ed-illinois

07-02-2001 12:03:20




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 Re: 3 point problem 2n in reply to bob govel, 07-02-2001 10:03:41  
what kind of fluid? (hopefully meeing ford/new holland spec MC134 or 80 to 90 weight gear oil)

correct fluid level? (early 9N used a bolt opening on the side of the tranny to check - dipstick on later models)

by fading in and out do you mean works sometimes and other times no responce? (I get that when fluid too low)

just checking, but you know when you put in the clutch the pump stops working?

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bob

07-03-2001 06:09:43




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 Re: Re: 3 point problem 2n in reply to Ed-illinois, 07-02-2001 12:03:20  
i used 90weight and by fading i mean it works good sometimes and just stops working and can start working again.



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Danny in CO

07-03-2001 06:52:31




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 Re: Re: Re: 3 point problem 2n in reply to bob, 07-03-2001 06:09:43  
Bob,

If you are using reqular 90 weight oil, that is not right. There are 2 choices for oil: Ford 134 or 80-90 weight mineral oil. There was a post a long time ago about the oils from Llamas that did a good job of explaining this. You could search the archives.

Danny



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