Gowesty has a wiper care youtube... it may help
https://www.youtube.com/watch?v=Pqk--uQUQ8w&list=UUDy57LhSN3iRCMzpySklwRQ

Pat

From:   Neil2 <vidublu@GMAIL.COM>
To:     vanagon@GERRY.VANAGON.COM
Date:   11/20/2015 01:49 PM
Subject:        '90 Wiper won't
Sent by:        Vanagon Mailing List <vanagon@gerry.vanagon.com>

One wiper failed yesterday and I replaced it with a spare.  I noticed the
knurled, round, metal 'gear' (on the chassis) has very shallow and narrow
teeth which had very little grip on the plastic barrel of the wiper blade.
The plastic was virtually smooth by the time I had removed it.

I wonder, is it mostly the age of the piece that rendered it so worn or is
it a poor design?  Anyone know of a source/part number for a new/improved
one?

Please/thanks!

--
Neil2
'82 Diesel Westfalia (Ducky)
'86 Vanagon/Westfalia Wannabe (SaVannah)
'08 170" 2500 Mega Roof Dodge Sprinter (Moby)
'90 Westfalia Subagon
Fulltiming since August 2008
Nunquam Pendite Divendium