In Reply to: Re: 8n hydraulic problem posted by Mitchell on May 25, 2020 at 17:47:38:
Lift arms dropping on their own or with a little help -it doesn't matter. A properly operating hydraulic system will sustain the lift arms fully UP with or without a load for week, even months. You've already determined there is definite cylinder issue so no need to do the leak test. As I stated in my first post, you should get the Essential Manuals and read all there is before attempting to pull the top cover and investigate further. The OEM 8N Operatorís Manual has a Chapter on the hydraulic system. The CLYMER/I&T FO-04 Manual has an excellent chapter on removal, rebuilding, reinstalling the system. I might also suggest at this time you consider rebuilding the PTO shaft seal and bearing. When you go to ordering parts, you can get the whole gasket kit (p/n 9N-500K), cylinder (p/n 9N-510-D ), piston (p/n NAA-530-B ), O-Ring
(p/n NAA-533-A), and backup wiper/washer (NAA-473-A) - see LINK.
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