Corsa Wiper arm remove

I have a corsa 97 model and I'm having problems with the driver side
wiper arm.
I got a replacement in the local scrapyard but i'm having trouble
removing the old broken one.I removed the black plastic cover,took off
the screw but the arm still won't budge.

Is there a special way to remove the old arm or is it a case of brute
force until it comes off.I don't want to damage the motor it is
connected to!

Thanks

 

What you can do is, once you have removed the plastic cap and nut is to
swing the wiper arm so that is at right angles to the screen then gently
move it back and forth in the direction of the pivot pin, so if the arm was
originally in the park position then you will move it gently in a general
direction from the bonnet to the windscreen, until it releases

 

Soak it in WD40 for a while first - they do get very tight.

 

Pour some hot / boiling water over the spindle, then follow the above from
Ian

Cheers
Martin