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9th April 2021, 20:10 | #11 | |
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Quote:
Thank you for that but in that case I'm puzzled to learn why my tester is failing while indicating the highest pressure whatever tyre & pressure I'm testing...
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
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9th April 2021, 20:30 | #12 |
I really should get out more.......
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It looks like there is a bit missing from your gauge. The end that presses on the tyre valve should have a round gasket which seals against the valve stem, and a pin which then presses against the valve, allowing a sample of air to be released, which ejects the gauge to showing the relevant pressure.
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9th April 2021, 23:01 | #13 |
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The air from the tyre and the calibrated friction balance one against the other to give you a reading.-- No friction from the seal means the sliding section can go to the maximum distance which is what is giving you the reading you are getting.
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10th April 2021, 07:07 | #14 |
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Here is my tester from another angle and how it looks like.
Obviously if anybody possessing the same may take a pic of his it would help me a lot to understand the difference, i.e. the shape of seal and pin we were talking about above. Thanks.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
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10th April 2021, 15:55 | #15 |
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Have a look at this, just a pic I found online. I have an old pencil gauge but not sure where it is.
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10th April 2021, 15:59 | #16 |
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Thank you Steve. Hence does it look like I only need the right seal?
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
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10th April 2021, 18:05 | #17 |
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I think its more than just the rubber gasket. Bit of internet digging revealed this old Rover tyre pressure gauge. As well as the gasket there's a brass screw type thing in the centre.
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10th April 2021, 19:17 | #18 | |
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Quote:
If you look up Air Gauging on the internet you will find lots of info on how air flowing through a hole can be be used to very accurately gauge the diameters of holes. Also the thickness of sheet materials down to 0.00005 of an inch.[/SIZE][/COLOR] |
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11th April 2021, 12:57 | #19 |
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It looks like you need a new seal washer.
Could be worth contacting Gordon Edwards of Vintage Pumps, as he is a specialist on this kind of thing. https://vintagepumps.co.uk/tyre%20pr...%20gauges.html
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11th April 2021, 16:47 | #20 | |
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