Rebuilding my 8N hydraulics and per advice on here, I ordered a new style piston NAA530B it recommended O-Ring NAA533A and back up washer NAA473A, both of which I ordered. So I think I have everything. However, now I'm confused I have two O-rings with one slightly thicker than the other. I've got a black leather ring and a separate ring that seems like its not leather, but something man-made and black on one side. How does all this go on the piston? One of the posts on hydraulics here mentioned "Install the CNH neoprene washer w/ the concave side toward the “O” ring." which doesn't seem to describe what I have. Help!
Re: Hydraulic lift piston washer - confused in reply to tom888fish, 08-24-2014 02:58:24
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Backup rings are available in flat and contour designs. Contour designs tend to work a bit better but either will work satisfactorily in your application. You should be using one o-ring and one backup-ring. The backup ring is placed opposite the pressure side of the o-ring.
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