1 - a
2 - a four bloc resistor grid, with
3 - a drawbar
4 and 5 - air tanks
On the other side there are
1 - probably the compressor
2 - an unknown small cubic device
3 - the brake cylinder
4 - an unkown device with a chain
5 - a square box, probably the switch box
Does anybody have further information about this parts? What is the unknown device #4 with his "bicycle chain" ?