The Sprite failed the annual test (APK in Dutch). To much play in the fulcrum pin in the lower wishbone and in the kingpin lower bushing.
Bad maintenance by the previous owner and old hardened grease caused wear on the Fulcrum pin and bushing.
The kork seals are worn out and the Kingpin shows wear. You can even see the grease groove from the bushing.
Old fulcrum pin next to a new one
Only the lower bushing need to be replaced. To get a nice fit the bushing has to be reamed to the diameter of the Kingpin. I used a lathe to align the reamer with the bushing and rotated the reamer by hand.
Using two long wire-ends to compress the spring.
Finished assembly, unfortunately I rotated the trunnion top 180 degrees, which caused a total misalignment (too much toe-in )of the wheels.