I got into a mini-production line fit of rebuilding Volkswagen VDO speedometers. This is the mess of nasty, corroded, gummed-up parts of two speedometers from so-called "Type 3" bugs-- the Fastback and Squareback VW's of the 1960's.
Note the discoloration of the plastic "glass", which was caused by demon rust on the metal panel that supports the plastic. Both of these speedos were in pretty rough shape. The input shafts were seized up and the old grease was about the consistency of dry clay soil. I had to build a couple of new special tools for these two, even though many of their "innards" are very similar to the VDO speedos used in Saabs.
Above is one of NINE pages of sketches I made as I disassembled, cleaned, adjusted, re-lubed and reassembled these speedometers. I do this on EVERY speedometer TYPE that I rebuild--the first time I encounter one. Makes great reminder information for the NEXT time I get one of them in for reconditioning. I could never see the point of reinventing the wheel....
Here are the two reconditioned Type 3 Volkswagen speedometers. Other than some very minor scratches on the plastic "glass", they're completely reconditioned, calibrated and ready to go--good as new!
City Car Design
5 years ago