How 2 - Strip and Clean an Electric Aerial.
Posted: Fri Mar 01, 2019 1:56 am
Just a few pictures, showing how a GM aerial is constructed.
It can be discussed here.
viewtopic.php?f=15&t=16652&p=168370#p168370
This particular aerial is part number 90 458 928.
Also showing how dirty and gummed up they get inside.
The electrics side - switching disc.
You can just see some verdi-gris forming on one of the brass fingers, close to the plastic retainer.
Now the Reel / Spool Mechanism inside.
Undo an M5 nut (8mm socket).
And 4 x self tapping screws. The one nearest the motor is very long.
The cover removed to expose the winding drum.
Remove plastic dust cap / washer and upper metal arm.
As soon as you remove the circlip, the lower metal arm will spring up off the central shaft.
Then lift off the central plastic drive mechanism - watch out for spring loaded plastic cams inside the larger piece.
And out comes the main drum.
Check out that crud.
It can be discussed here.
viewtopic.php?f=15&t=16652&p=168370#p168370
This particular aerial is part number 90 458 928.
Also showing how dirty and gummed up they get inside.
The electrics side - switching disc.
You can just see some verdi-gris forming on one of the brass fingers, close to the plastic retainer.
Now the Reel / Spool Mechanism inside.
Undo an M5 nut (8mm socket).
And 4 x self tapping screws. The one nearest the motor is very long.
The cover removed to expose the winding drum.
Remove plastic dust cap / washer and upper metal arm.
As soon as you remove the circlip, the lower metal arm will spring up off the central shaft.
Then lift off the central plastic drive mechanism - watch out for spring loaded plastic cams inside the larger piece.
And out comes the main drum.
Check out that crud.