X308. Ongoing problem with no output from washer. Flushed out tank but no joy, so next step checking one-way valve involving removing windscreen wiper, to remove plastic cover for access.
Removed nut, and pipe from cover. 2 tools for removing wipers would not fit under arm, but luckily it pulled off by hand quite easily.
I noticed the spline looked a bit worn, and the the hole in the wiper arm looks virtually smooth.
Has anyone seen this before, and was it okay when you put the arm back on? I’m hoping there will still be enough grip between wiper hole and spline that it won’t slip.