Quoted from Rob_G:
You're also missing the cover for the crane motor assembly. Was it ever there?
Yep, I had the cover off.
I’ve been trying to rid the crane of the play, because when the crane is in the left most position, you whack the crane with the ball and the movement absorbs the shock, and it doesn’t register.
I did a few “key posts” a while back about the crane, we can add these notes to them.
I pulled out the crane motor and belt today, as the pulley was moving when the crane was hit. I was very surprised to see this:
A square shaft and a round gear.
Now, anyone with any brains will know that ain’t gonna lock on the shaft. There’s no set screw or anything.
The way they’ve done it is to compress the gear between a heap of washers, including 2x curved compression washers to create a simple clutch arrangement. I guess they did it this way so if there is a catastrophic failure and the crane gets jammed up on the sides, the gear will slip and things won’t bust up.
The downside of this is that unless the assembly is tightened beyond tight to compress the curved washers, the gear can slip pretty easily, and that’s what’s happening with mine. Hit the crane in the left most position, and it moves up, absorbing the shock.
So after some mucking around, I got it “tight as all f**k” and I’ve killed the movement, and the crane works like a champion.