Zetor 6211 power steering fluid?

[Tractorman52]

I’ve asked a few questions already as I’m getting used to this tractor but I see the power steering tank in front of the radiator and as silly as this sounds but upon screwing the large cap off there’s another nut under it I’d need to screw off to check the fluid, to the left side I thought it was a screw out dipstick but the nut won’t budge with a spanner, anyone have any idea lol? Also it has its standard air filter inside the bonnet but no pre cleaner is it best purchasing one to attach inside the bonnet? Sounds silly questions lol but I’m more a vintage man

 

[Bill]

On my 7245 the large filler cap had a large magnet bolted to it to collect filings, and this had a gauze screen around it which fitted into the tank first. Itcould be quite difficult to pull the magnet out.
I wonder if yours has come unscrewd, or stripped the thread in the cap and stays behind blocking the opening when you remove the cap.
The small plug is the dipstick, with an O ring under it and again can be difficult to remove if over tightened.

 

[Bill]

If you have a cartridge type air filter it should be fine as is. My 72 had an oil bath with mushroom through the bonnet.

 

[Lazy Eric]

There should be a little red dip stick separate to the main cap.
You undo that , not the nut below. The red dip stick screws in.
Under the main filler cap there is nut I think holding in a gauze .
Just pour the oil through this if I remember right.