John Greenland
CVRS Member

The item in picture # 2 is also an adjustable capacitor.
You will find its lock nut under the chassis.
The center rod inside it will slide inside the assembly to adjust capacitance.
I came across one of these type capacitors in an old aircraft receiver that was not repairable.

The above assumes that the # 2 item is the same as mine. It looks like it is.

John G.