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Old 08-18-2016, 08:31 AM   #1
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Tst tpms

Has anyone had a problem with a TST 507 sensor leaking air?

Thanks!
Wil
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Old 08-18-2016, 09:20 AM   #2
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Quote:
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Has anyone had a problem with a TST 507 sensor leaking air?

Thanks!
Wil
There is an o ring inside the sensor that is easily damaged due to over tightening. That will cause a leak. Remember that you want a snug fit but don't toque in on. Over tightening will cause a leak.

Since I am hard of hearing I make sure I am wearing my hearing aid. I turn the sensor until the hiss stops and then maybe an additional 1/8 turn.

I have been running 10 sensors for years and I have replace maybe 1-2 o rings.
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Old 08-18-2016, 04:42 PM   #3
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Had ours for almost 3 years never leaked. They are the non flow through sensors.
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Old 08-18-2016, 04:43 PM   #4
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Has anyone had a problem with a TST 507 sensor leaking air?
Thanks!Wil
Are yours the flow through type? I have 10 of the non flow through and have not had a leak.
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Old 08-18-2016, 04:49 PM   #5
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Has anyone had a problem with a TST 507 sensor leaking air?

Thanks!
Wil
I had a leak with mine, the cap had a hairline crack in it, but you want to change out the O rings every couple of years, they get old and crack. I order them from tire minder research, they will send you a small pack with 15-20. Regards
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Old 08-18-2016, 05:36 PM   #6
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I have the flow through sensors. Had one leak when I pinched the o'ring, backed it off reinstalled no more leak.
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Old 08-18-2016, 06:13 PM   #7
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The O-rings can be damaged but are simple to replace. Give TST a call and they will send you a bunch for free.
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Old 08-18-2016, 06:38 PM   #8
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Wil, there's a sweet spot with the flow through o-rings. As you thread it on you'll here a short, mild hiss as the Schraeder is engaged. Just as the hissing stops you've compressed the o-ring enough to hold pressure. If you turn it too far you will a) possibly damage the o-ring so it will not hold pressure, and/or b) so compress the o-ring that it will not pass any air should you try to add air using the flow through feature.
I learned this through experience early on, but once this trait was noted, I have had no problems for almost four years.


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Old 08-19-2016, 02:31 PM   #9
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Thanks everyone!

Seems I have been tightening the sensors too much. I'll try again with the advice from this forum.

Good Luck!
Wil
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