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PostPosted: Sun Sep 08, 2019 7:54 pm 
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Joined: Wed May 01, 2013 10:29 pm
Posts: 62
Car Model: 99 Turbo 3 dr January 1979
Hi,

As I tidy up the interior electricals I have pulled out the binnacle. Prior to this the speedo was sticking, generally at low speeds. Before i put it back together are there any particular things I should do to try and improve Speedo accuracy and reduce the 'stickiness'. I am loathed to spray around lubricant etc. for fear of damaging the mechanism.

Thanks

Spencer

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1979 99T Black 3 dr


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PostPosted: Mon Sep 09, 2019 7:18 am 
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Joined: Sat Jun 20, 2009 4:36 pm
Posts: 115
Car Model: 1978 99T 3 door, black
Is it sticking or is a coupling slipping? On accessing the binnacle on my 1978 99T (to replace failed lamp) I discovered a wee bit of plastic coupling the speedo cable and the dial had cracked and broken. I managed to bodge a solution but now the needle jumps about until I get to ~20mph.


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PostPosted: Mon Sep 09, 2019 3:15 pm 
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Full Pressure Turbo

Joined: Sun Mar 02, 2014 2:30 pm
Posts: 986
Location: Belgium
Car Model: C900 T16S
Could it just be the cable sticking ?
I've had similar problems on old motorcycles before, try lubricating the cable and see if it makes any difference.


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PostPosted: Mon Sep 09, 2019 5:57 pm 
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Car Model: 99 Turbo 3 dr January 1979
Thanks - I assume WD40 or something similar would be fine?

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PostPosted: Mon Sep 09, 2019 6:32 pm 
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Joined: Mon May 07, 2012 6:41 pm
Posts: 1511
Location: somerset
Car Model: 93 2007 Tid vert 93 2000 vert
Spencer wrote:
Thanks - I assume WD40 or something similar would be fine?


Wd40 is a Water Displacement solution not really a lubricate.

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Punctuation, Spelling and Grammar will be used sparingly. Due to rising costs of inflation.


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PostPosted: Mon Sep 09, 2019 7:05 pm 
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Full Pressure Turbo

Joined: Sat Jan 05, 2013 12:10 am
Posts: 710
Location: West Berks
Car Model: XC70.....
I’d use a graphite spray lubricant. Sparingly.

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PostPosted: Tue Sep 10, 2019 9:17 pm 
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Joined: Tue Oct 30, 2007 9:26 pm
Posts: 6144
Location: North Essex
Car Model: 900Ruby,vert, 9000, 99, Sonett
The speedo needle can be "sticky" particularly if left standing for some time (years). At one time I parked with the speedo reading 110 mph!
Using it regularly may solve the problem. Alternatively you could try some light oil (ie sewing machine oil) on the needle spindle.

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I came into this world with nothing & I've still got most of it left.


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PostPosted: Tue Sep 10, 2019 9:36 pm 
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Joined: Wed May 01, 2013 10:29 pm
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Car Model: 99 Turbo 3 dr January 1979
Thanks for all the ideas I'll keep you posted....

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