trip to suction not working

Hi! I am new to letterpress and trying to get my Heidelberg Windmill up and running for printing. I am having trouble getting my trip to suction button to work and was wondering if anyone had any tips on trouble shooting this issue. It seems to be stuck in one position and I cant get it to move!

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Try cleaning and lubricating the area around the front. In the back area where the shaft sticks out clean follow the shaft and the connector, clean off any build up and then oil it. It may have rust build up or dirt from none use. Don’t force it just try to work it back and forth.

use a mix of whatever penetrating oil you can get with automatic transmission fluid. use a heat gun or hair drier to apply mild heat.