[RoyJackson]

Find a nice level place to park it. Don't park the loader on ground (meaning directly on dirt or grass). Better on concrete, if you can.

Put a light film of grease on all the cylinder rods, remove any minor rust and touch up those areas with paint (Rustoleam works).
Cap off all the hydraulic hoses and lay them (or use wireties) over the loader frame.
Then cover it with a plastic tarp. Just leave it lose enough to allow air circulation.
Just check it out once a month and regrease and touch up, if required.

I leave my loader off all mowing season unless I have a task which requires it's use (such as brushcutting). Leaving the loader off is easier on the front wheel bearings (so I'm told).

Downside is the lack of front weight occasionally when transporting my RFM.

Remember, tractors set outside at many many dealers for months at a time.