Dismantling a speedo

Post by **rolesyboy** » Mon Jul 11, 2011 10:08 am

Hi. Does anybody have any tips or advice on how to dismantle a Smiths speedo and also how I can test it works off the car please? Thanks. Mark

Post by **guru_1071** » Mon Jul 11, 2011 11:50 am

mark

my only top tip would be to use a plastic fork to get the needle off with minimum damage.

you can test speedo by using a very slow electric drill and an old cable

Post by **rolesyboy** » Mon Jul 11, 2011 12:23 pm

OK. Thanks Rich. Next question: what causes the needle to fluctuate? Can I repair? Anyone got any instructions on dismantling/ rebuilding & 70's style "clocking" etc. Yes don't worry, this isn't Arthur Daly here. Just want to zero the speedo. I am sure my car has done well in excess of 300000 miles but don't think after 50 years it is really relevant what miles it has covered. Cheers.

Post by **guru_1071** » Mon Jul 11, 2011 12:34 pm

it can be many things, the speedo its self, binding cable, tight speedo drive or even a worn main bearing causing the gear kit to 'pulse' the cable.

mini129 · Post by **mini129** » Fri Jul 15, 2011 10:20 am

the inner speedo cable and the eccentric gears in the speedo are the main causes of fluctuation in a mini speedo

mini129 · Post by **mini129** » Fri Jul 15, 2011 10:23 am

by the way do not use a plastic fork to pop the pointer!
Grab the speed cup and turn the pointer anticlockwise

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Dismantling a speedo

Dismantling a speedo

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