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8N Lift

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Mike Bridwell

08-23-2002 07:21:50




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I purchased a new NAA-530B piston and the felt and O ring seal. Now I need to know the position they are placed on the piston groove. Assuming the front of the piston is the solid end, which seal is placed closest or nearest the front of the piston?




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don b

08-24-2002 05:35:53




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 Re: 8N Lift in reply to Mike Bridwell, 08-23-2002 07:21:50  
Put the new piston on your work bench with the DOME end up.Heat some water to boiling point,remove from heat.Put the leather backing ring into the hot water and let sit for about 20-30 minutes[until the leather is plyable].The leather backing ring has a smooth side and a rough side.After the leather backing ring is plyable, carefully slide it down the piston into the groove with the ROUGH side UP.BE VERY CAREFUL,THEY WILL TEAR IN A HEART BEAT.Next,oil the rubber "O" ring and slide it down the piston into the groove on top of the leather backing ring.DO NOT ROLL THE "O" RING ONTO THE PISTON.You can use a brake cyclinder hone to polish the cyclinder.If there are deep scratches or gouges in the cyclinder,replace it NOW.Don't forget to replace the three gasket that go under the cyclinder when re-installing.IMHO don

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Dell (WA)

08-23-2002 08:15:15




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 Re: 8N Lift in reply to Mike Bridwell, 08-23-2002 07:21:50  
Mike..... ..... on the NAA 3-point piston, rubber "O" ring to the hydraulic pressure side of the piston and then the back-up ring.

This is the first time I've ever heard of a "felt" back-up washer, are you certain?

Usually, the NAA backup ring is hard leather and needs to be boiled about 15 mins in hot water to make it plyable to stretch over the piston. Oil don't do it..... ...Dell



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Mike Bridwell

08-23-2002 11:14:21




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 Re: Re: 8N Lift in reply to Dell (WA), 08-23-2002 08:15:15  
Dell,
Thanks for the reply. I got the seal set in a complete gasket set for the hydraulc pump and haven't opened it yet. The counter person at the Ford dealer told me it was a felt seal. He is also the person that told me the rubber o ring goes on first closest to the Hollow end of the piston. Which appears to be a direct contradiction to what you just told me. I didn't think he was right is the reason I made the post.

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bg

08-24-2002 07:50:17




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 Re: Re: Re: 8N Lift in reply to Mike Bridwell, 08-23-2002 11:14:21  
Don't rely on anything the parts person at Ford/New Holland tells you unless he's about 75 years old.



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Rick Ga.

08-23-2002 08:12:47




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 Re: 8N Lift in reply to Mike Bridwell, 08-23-2002 07:21:50  
Hi Mike. I put the NAA O ring in my lift cylinder piston. If I remember correctly, the rubber O-ring goes toward the front (flat end) of the piston and the leather/felt washer goes to the back (dog bone) end. Also, soak the leather washer in warm water before installing it or it will break. (No guarantees with free advice/instructions.) HTH. Rick Ga.



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Mike

08-23-2002 11:18:17




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 Re: Re: 8N Lift in reply to Rick Ga., 08-23-2002 08:12:47  
Rick,
Thanks for the reply and information. Sounds logical to me.



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