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Old 03-23-2023, 05:46 PM   #3
JayJay
Senior Member
 
Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,076
Default Re: speedometer rebuild

Quote:
Originally Posted by nkaminar View Post
I forget. Which way does the adjustment go on the hair spring to make the speedo read slower? Mine is about 5 mph fast. I think it goes to make the spring shorter, away from the fixed point. I test the speedos with a drill motor using the right rpm to read in the normal range, about 50 mph. If after it is adjusted, it reads 5 mph slower at the same drill motor speed, then I know I have fixed it.
Or, if it reads 5 mph faster at the same drill motor speed, you adjusted it the wrong direction...

JayJay
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JayJay
San Francisco Bay Area

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1930 Murray Town Sedan
1931 Briggs S/W Town Sedan
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