Gear shift not staying

[Weimar]

I had this in the shop, ALL summer, so went to get it back and was moving manure from near the house.
The rubber bootie broke, i thought I ordered the correct one, looks small.
Got the parts number from the forum.

Will not easily go into gear, help please...

pictures below.

 

[Bee-Positive]

That 40 year old boot looks pretty dry rotted. Probably got 10 years worth of dust, dirt, and water in there. Take it apart, clean it, lube it up.