help me figure out instrument cluster.

[greg]

on 4321 there is one lamp i cannot figure out it looks like a gear with a bowx over the top red light upper right corener of the dash i bought this thing wwtih the wrong manual

 

[Renze]

I think it is a pictogram of a splined PTO shaft with the PTO shield above it.

The button under the PTO clutch switches this signal lamp.

 

[tagew]

Maybe it could be the controllamp for air pressure, it will turn off when the pressure comes up to 0,4 Mpa and it is connected to the pressure contact on the top of airtank.
Regards Tage W.