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Replacing Ram Cylinder Rings

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8N34347

05-22-2003 15:02:53




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My lift drops so quick it's a pain in the butt,is it possible to pop the cover and replace the rings without messing up any adjustment or anything.Never been in there before.Any advice will be welcome.I'm a pretty good mech. but no little about hydralics.The pump seams ok,takes about 8 or 10 seconds to raise a big box scrape all the way up,goes down about that quick as soon as the clutch is pressed.

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raytasch

05-22-2003 16:09:04




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 Re: Replacing Ram Cylinder Rings in reply to 8N34347, 05-22-2003 15:02:53  
If the lift cylinder is leaking you will see the oil dripping down from top as that is where the cylinder is. If you replace the rings most experience recommends going with an NAA type piston that has an O-ring and backing washer instead of the steel rings. IMO, the O-ring is more forgiving than the steel rings.
fwiw,
ray



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8N34347

05-22-2003 16:17:53




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 Re: Re: Replacing Ram Cylinder Rings in reply to raytasch, 05-22-2003 16:09:04  
Thanks Ray,Doesn't changing to the O-ring set up require changing the piston also?I've read some where if your cylinder is worn,the O-ring won't last? And if it's like most everything else on this tractor, it is.



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raytasch

05-22-2003 16:34:57




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 Re: Re: Re: Replacing Ram Cylinder Rings in reply to 8N34347, 05-22-2003 16:17:53  
Yes, the NAA piston will be required. If the cylinder is worn or has ridges neither the steel rings or O-rings will last. The rings will not seat in a worn cylinder where the O-rings may assume the contour and be more forgiving. If the cylinder is worn, has rust pits, or has ridges try honing it. You may have to replace it if ridged or worn badly. Remember the steel rings will not 'wear in' quickly like those of an engine and must be a perfect fit.
ray

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Larry

05-22-2003 15:26:43




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 Re: Replacing Ram Cylinder Rings in reply to 8N34347, 05-22-2003 15:02:53  
Find out what the problem actually is. Remove the side plate (oil won't pour out unless over filled). Look in with a flashlight and try to be a contortionist,then start the tractor, engage the PTO and see if there is:
A. Oil pouring from the top of the pump, or
B. Turbulence in the oil at the bottom.

A. Equals the ram cylinder has a problem or
B. Equals that the pressure relief valve is tired.

I'd bet on the relief valve. Kind of a "spark plug-looking device, and can be replaced reasonable easily.

Regards,
L and C Ranch

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8N34347

05-22-2003 15:58:43




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 Re: Re: Replacing Ram Cylinder Rings in reply to Larry, 05-22-2003 15:26:43  
Thanks Larry,That sounds like good advice,my problem is everything that isn't red is removed for paint and the oil is out to replace pto shaft seal.I'd like to fix it before paint,is there a way to tell which is bad without oil in.raising and lowering the lift arms offers no resistance.ie.the rings aren't touching the cylinder.



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Larry

05-22-2003 16:19:06




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 Re: Re: Re: Replacing Ram Cylinder Rings in reply to 8N34347, 05-22-2003 15:58:43  
I always do the mechanical work prior to painting, but I'd go with Ray's advice. I'd also replace the relief valve while there (while there is no oil). You'll be happy later.

Thanks for the response!

Regards,
L and C Ranch



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