B&G speed indicator sticking

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jsl

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I've had it apart several times (irritating job, with 16 screws), and attempted to wash the pivot with lighter-fuel and then lubricate with light oil. No joy: the needle is free if the central black cover-plate is wriggled ever so slightly, but not otherwise. Any suggestions, anyone? Anyone got a working one they don't want? (Ten-knot dial, black face.)
 
Tinley Electronics in Lymington (New Forest) will do estimates and repairs with factory warranty - they are helpful and reliable but very expensive - or if you think car repairs at the main dealer are not expensive you might think them reasonable!
 
jsl said:
I've had it apart several times (irritating job, with 16 screws), and attempted to wash the pivot with lighter-fuel and then lubricate with light oil. No joy: the needle is free if the central black cover-plate is wriggled ever so slightly, but not otherwise. Any suggestions, anyone? Anyone got a working one they don't want? (Ten-knot dial, black face.)
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It's possible for the central cover to displace very slightly and impede the needle, and from what you write it sounds as if that may be your problem. As david1000952 has said, Tinley are supposed to be able to mend these things, but I consider that only a theoretical possibility as I have never received a reply from them to any enquiry about such things. Repeaters come up on eBay regularly; you have to make check whether what's being offered is a Synchro repeater or one of the previous generation. The synchro has different terminal markings on the back ("cos" and "sine", from memory) and the word "synchro" at the bottom of the dial. I have a complete set of spares (sorry, just one of each) for which I paid about £20 - £30 apiece. There was also a rumour that the barge at Bursledon had a stack of repeaters for sale.

However, check that central cover again!
 
Thank you, JumbleDuck. The central cover is certainly part of the problem, but I have not yet found a way of making it stay in a position which does not impede the needle. If I pull it very gently away from the face, the needle is free, but when I let it go....
 
jsl said:
Thank you, JumbleDuck. The central cover is certainly part of the problem, but I have not yet found a way of making it stay in a position which does not impede the needle. If I pull it very gently away from the face, the needle is free, but when I let it go....
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This is all from memory, as I'm away from home, but I think there is a sticky disk on the cover which you can peel carefully off to reveal a mounting screw behind it. I know I managed to get the cover adjusted somehow.
 
In mine, the central mounting screw is visible, painted black like the cover. So I should try to get the right size of screwdriver into it? It has been reluctant to respond to a slightly wrong size. There is a fine wire soldered to the underneath part which is closest to the needle's base, so I have been very nervous about trying to move the cover more than a few degrees on its axis.
 
jsl said:
In mine, the central mounting screw is visible, painted black like the cover. So I should try to get the right size of screwdriver into it? It has been reluctant to respond to a slightly wrong size. There is a fine wire soldered to the underneath part which is closest to the needle's base, so I have been very nervous about trying to move the cover more than a few degrees on its axis.
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Can you hang on a day? I'll be back in my workshop tomorrow and have an old repeater there which I can experiment with. Better to bust that one than yours ...
 
That is very kind. I can easily hang on. I'll send you my email address, in case you prefer that style of communication.
 
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