Hi Charlie,
These capillary gauges are very simple but reasonably easily
repaired. You probably heated the nut and bulb way above 230F expanding the
Bourdon tube in the gauge beyond what it was designed for and I hope for you
it's just "stuck" in this position. The Bourdon tube pushes/pulls a little
curved "rack" which rotates a little gear on the shaft where the needle
connects to, so you might just have pushed it beyond it's range. if this is
the case and the bourdon tube is not too stretched or damaged then the
gear/rack could be re-engaged and re-calibrated. Accuracy after this
operation? Who knows? Also the hairspring that is supposed to bring the
needle back might not be operating properly. A lot's of "if's". I hope you
didn't smell any ether which could point to a leak.
Scroll down on this page
for a nice pic of the mechanism: http://www.eddinsmoto.com/id119.htm
Bert
________________________________
From: Charlie Schott <schottc@knology.net>
To: BJ8 Healeys <sbyers@ec.rr.com>; 'healeylist' <healeys@autox.team.net>
Sent: Thursday, January 3, 2013 4:31 PM
Subject: Re: [Healeys] Smith's Temp
Gauge
Steve,
Thanks for the reply on adjusting the temperature gauge.
Unfortunately, on mine the mounting nut was frozen to the sensor so I applied
heat to expand and, subsequently, loosen it. Now the needle is pegged at 230
degrees. Did I ruin the gauge or is there something that can be done to
salvage it? Thanks.
Regards,
Charlie Schott
-----Original Message-----
From: BJ8 Healeys
Sent: Sunday, December 30, 2012 3:50 AM
To: 'healeylist'
Subject: Re: [Healeys] Smith's Temp Gauge
Bob, I calibrated my gauge just as
Kees recommends: I found it reading 10
degrees too high (kind of explains my
"overheating" problem). Putting the
needle back on so that it was exactly
between the two dots at 212 deg.
while the sensor was immersed in boiling
water fixed it.
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC USA
-----Original Message-----
From: healeys-bounces@autox.team.net
[mailto:healeys-bounces@autox.team.net]
On Behalf Of Bob Spidell
Sent: Sunday,
December 30, 2012 1:14 AM
To: healeylist
Subject: [Healeys] Smith's Temp Gauge
Anyone got info on how to calibrate the Smiths temp gauge? I know about
immersing in boiling water, etc., but I think there might be a couple screws
or a wire to bend or something.
Bob
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