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TR2/3/3A Speedometer question
- Thread starter karls59tr
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Have you ever repaired the other mechanical counter or is this not a DIY job?
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I have, but it's tricky. I would consider doing it again if it didn't involve disassembly of the odometer counter itself. The rest of the stuff is much easier to deal with.
That said, if only one counter is not working, something is probably worn or broken, and you won't have spare parts. I would either find a replacement speedometer or send it to a specialist; there are a lot of them and, from what I've seen, most are not unreasonably expensive.
That said, if only one counter is not working, something is probably worn or broken, and you won't have spare parts. I would either find a replacement speedometer or send it to a specialist; there are a lot of them and, from what I've seen, most are not unreasonably expensive.
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Replying to myself, must be past the edit window. I didn't explain that very well. Once you have the cover off you can access the counters. As I recall you can move the separate digit rollers by hand or with a small screwdriver. There is a metal piece that extends out from the digit roller that facilitates this.
So it is possible that the rollers may be just stuck and they can be freed up. Should a person use some sort of light lubricant to help gets things moving? This might be worth a try before sending the unit out to a shop?
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In my opinion worth a shot, I use this stuff, sparingly.
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DWP Industries I
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Have a look at this:
Flannery Speedometer Repair » Dr Mike Flannery
I repair most Magnetic and Governor Speedometers, Specialising in instruments dating from 1900 until 1970, also repair car clocks and other car gauges, please contact me for details
You have probably lost some teeth from one of the plastic gears. You can rob a gear from a scrap speedometer but there are several different types, depending upon the speedometer gearing. If you find any Smiths speedometer with the same turns per mile (the three or four digit number after the SNxxxx/xx number) it will have the same gear as your speedo.
CJD
Yoda
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TR3 should have metal teeth, unless it has been mixed and matched with later heads.
The normal failure is gear lube from the tranny works its way up the cable into the speedo head. Then, over many years it becomes a sticky solid that jams up the Odometer mechanism. The odometers are very fidgety, with many small parts...only a job if you are very organized and a patient worker. But, with care you might be able to clean the mechanism of old lubricant and get it turning again without dis-assembly.
The normal failure is gear lube from the tranny works its way up the cable into the speedo head. Then, over many years it becomes a sticky solid that jams up the Odometer mechanism. The odometers are very fidgety, with many small parts...only a job if you are very organized and a patient worker. But, with care you might be able to clean the mechanism of old lubricant and get it turning again without dis-assembly.