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Bike pump pressure gauge repair
I have a pump dating back to around 85 that has a built in pressure
gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. |
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#2
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Bike pump pressure gauge repair
On 4 Jun 2006 16:10:39 -0700, "BillX" wrote:
I have a pump dating back to around 85 that has a built in pressure gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. Check with the manufacturer, if you can identify who made it. Without their support in making parts available, I suspect that the answer is going to be "no". Most tire pressure guages have no provision for calibration via any user-adjustable feature. (In fact, none of the ones I've had could be recalibrated.) -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#3
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Bike pump pressure gauge repair
BillX wrote: I have a pump dating back to around 85 that has a built in pressure gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. You might give it a go by using a digital pressure gauge made by topeak. Pump up your tire to whatever desired psi using your old pump. Check what the pressure gauge reads. Take another reading using the digital pressure gauge. You may not ever be able to get your old pump gauge to read properly but at least you'll know how much it's off by. May be a little overkill as the digital pressure gauge is around $20. But hey, if you've grown emotionally attached to your 21 year old pump why not? http://tinyurl.com/0 |
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Bike pump pressure gauge repair
My Tiny Url function seems to have gone out to lunch. Try this one. http://www.performancebike.com/shop/...slisearch=true |
#5
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Bike pump pressure gauge repair
BillX wrote: I have a pump dating back to around 85 that has a built in pressure gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. This is a floor pump? W/ a round pressure gauge? If so, numerous air pressure gauges are available from people like Enco & McMaster-Carr. I'm fairly certain you can find one to fit your needs. It doesn't have to be bicycle specific, & it will probably be cheaper. While you have it apart, you might want to clean & lube the check valve, too. Regards, John |
#6
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Bike pump pressure gauge repair
On 4 Jun 2006 19:40:45 -0700, "Kenny" wrote:
You might give it a go by using a digital pressure gauge made by topeak. I've been thinking about buying exactly that - are you pleased with it? |
#7
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Bike pump pressure gauge repair
john wrote: BillX wrote: I have a pump dating back to around 85 that has a built in pressure gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. This is a floor pump? W/ a round pressure gauge? If so, numerous air pressure gauges are available from people like Enco & McMaster-Carr. I'm fairly certain you can find one to fit your needs. It doesn't have to be bicycle specific, & it will probably be cheaper. While you have it apart, you might want to clean & lube the check valve, too. Regards, John Yes, it's a floor pump with a round gauge. Think I'll start with someone's suggestion to measure if the gauge is always off by the same amount first and just correct in my head if that's the case. Otherwise I'll check out your solution. Thanks. |
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Bike pump pressure gauge repair
Bill Brunning writes:
I have a pump dating back to around 85 that has a built in pressure gauge that's been working great until a couple weeks ago. For some reason the gauge now reads 5-10 lbs when not in use. Is there a way to fix or recalibrate? It looks like there are some access screws surrounding the gauge housing. This usually occurs when someone fails to knock free (or even unscrew) a Presta valve when inflating a tire. In that event, initial pressure to open the valve can greatly exceed 200psi and stretch the Bourdon tube (that uncurls to give pressure readings). http://tinyurl.com/z4unj A common fix for this is to lift the pressure indicator needle from its shaft (this is a press fit) and put it back in the shaft positioned at zero. Most of these gauges are still reasonably linear with as little yield as 5-10 psi. Jobst Brandt |
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