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windscreen wiper

Posted: Fri Aug 24, 2007 1:55 pm
by LULUMAC
please could any one tell me if a mini twin speed motor would fit my morris or if not do u no any that would?

Posted: Fri Aug 24, 2007 2:11 pm
by bmcecosse
It could be adapted to fit - but it won't be a bolt in modification. The wiping arc may also be too great. I think in the dim and distant past a mod was to fit 2 speed motor from Triumph 2000 - anyone confirm this ? Many years ago (ahem 40 ish!) I modified the wiper motor on my Rally Minor by fitting a variable resistance into the Field winding circuit - in series with the Field coils. Increasing the resistance reduced the field strength and so the motor ran faster - BUT it did not produce the same power and so this could only be used on a very wet screen - it would stall easily if the screen dried out. I found it worth while - the blades (clap hands) would literally go like the clappers - but had to keep an eye on the dryness of the screen and turn the resistance back to zero as the screen dried out. It may also be possible to fit the 3 brush '2 speed' brush holder into the standard motor (that's how it's done - the high speed brush is further round the comm) - I bought such a thing all these years ago, but never had time to install it. Maybe a winter project for me - I had forgotten all about it !!