Thank you for your reactions they really help!
When i took te motor apart I made sure to place everything back how they should be. When I had the front cover off I saw that when I turned the shaft the spring hanger jumped back and forth normally, so I don't really know why it doesn't work with the vacuum on.
As Phak1 mentioned, shipping from the Netherlands to America is really costly and it's not really worth it. The truck itself is in really good condition (for a patina truck) and runs and drives great. We only drive it for fun and for advertising purposes for our gardencenter. So buying an electric motor is also a bit pricy for the little bit that we drive. I always make sure to check the weather before I drive it. But as I said the weather in the Netherlands is really unpredictable. So it would be nice to have working wipers again.
