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02-27-2022, 09:33 AM
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#1
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Junior Member
Join Date: Jun 2015
Location: Lexington, SC
Posts: 19
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TST 507(new) sensor releases air
Has anyone had this issue. Tire is fully inflated and I put on flow thru sensor. The next day the tire has lost air and down to like 45. This has happened twice. Have rechecked tire with guage and it reads same as TST does. Tire is rear inside tire. Have never had any issues with this tire before on other system I was using. I have changed to TST system and this is the first I have installed. No other problems with sensors.
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02-27-2022, 10:48 AM
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#2
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Senior Member
Join Date: Jan 2022
Posts: 624
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Have you checked the O ring? Maybe compare the sensor to another one.
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02-27-2022, 11:54 AM
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#3
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 24,125
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Check the o-ring in the sensor, they can get wedged in there. TST makes a replacement set for the servicing the sensors. Another issue, some metal extensions on the inside duals don't play well with TST sensors. TST has a particular brand they recommend; you need to call them.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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02-27-2022, 12:05 PM
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#4
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Senior Member
Join Date: Jul 2021
Posts: 834
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Had the same thing happen with 2 different sets of TST’s. I returned them
all and decided I didnt need them. The first time it happened I came out the next morning and my brand new front tires were dead flat. Pissed wasn’t even close to the rage I felt. Second attempt flattened my drivers rear outside. I called it quits after that. I know there’s a few reasons why this could happen, but I don’t care about the reasons. I expect them to work without effort. If my coach/car/truck isn’t factory equipped with them then that’s the way they will stay.
__________________
2012 32’ Tiffin Breeze
2007 29’ Winnebago Aspect (Sold)
1983 35’ Bluebird Wanderlodge (Sold)
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02-27-2022, 12:23 PM
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#5
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Senior Member
Monaco Owners Club
Join Date: Aug 2020
Posts: 216
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Quote:
Originally Posted by Hpozzuoli
Had the same thing happen with 2 different sets of TST’s. I returned them
all and decided I didnt need them. The first time it happened I came out the next morning and my brand new front tires were dead flat. Pissed wasn’t even close to the rage I felt. Second attempt flattened my drivers rear outside. I called it quits after that. I know there’s a few reasons why this could happen, but I don’t care about the reasons. I expect them to work without effort. If my coach/car/truck isn’t factory equipped with them then that’s the way they will stay.
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Were those also flow-thru?
.
__________________
2002 Monaco Windsor 8.3 350hp
34ft 3 slides 6 solar panels
Santa Cruz Mts, Calif
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04-11-2022, 10:15 PM
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#6
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Member
Join Date: Dec 2020
Location: San Diego, CA
Posts: 38
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I had great luck with my TST's and never lost air with the caps the 5 years or so I used it. The screen ended up quitting on me a while ago. I just purchased an RVi system and am selling or offering for trade for ?? my 6 pressure senders:
https://www.irv2.com/rvclassifieds/s...?product=19978
__________________
2001 Rexhall Aerbus - 32' Class A - P53 Chassis (V10) - 2021 Bronco toad
Lithium Coach Battery - 2500w inverter (whole coach)
JM's Cheap Handling Fix - KYB Shocks - Banks Headers and TransCommand
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04-12-2022, 04:51 AM
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#7
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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Give them the spit test on end of sensor.
__________________
2007 Fleetwood Revolution LE 40V
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04-12-2022, 08:44 AM
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#8
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Dec 2009
Posts: 762
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Quote:
Originally Posted by Dutch Star Don
Check the o-ring in the sensor, they can get wedged in there. TST makes a replacement set for the servicing the sensors. Another issue, some metal extensions on the inside duals don't play well with TST sensors. TST has a particular brand they recommend; you need to call them.
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Don glad to read your post, I have 1 tire that is giving me fits on air leaking. I have tried several extensions and still get some leak. I will check with TST to see what extensions they recommend. 
__________________
2014 Tiffin Allegro Bus
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04-12-2022, 12:31 PM
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#9
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Senior Member
Join Date: Dec 2021
Posts: 123
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Just replaced a nice looking rim - discovered it was leaking at least 1 PSI per day...the leak was right thru the metal rim (aluminum), not the 507 cap.
Once the tire was re-mounted on a new rim, found the 507 "o-ring" was then leaking. After straightening it out, the o-ring seal is now holding pressure.
__________________
2019 Vilano 369 FB / 8" Axles / Disc Brakes / Triple AC's
2019 GMC Sierra 3500 Denali DRW Duramax 6.6 Turbo Diesel 8' CC/ Curt A25 Hitch / Air Lift air bags/ Furion Camera System
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04-17-2022, 02:05 PM
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#10
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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Quote:
Originally Posted by Dutch Star Don
Check the o-ring in the sensor, they can get wedged in there. TST makes a replacement set for the servicing the sensors. Another issue, some metal extensions on the inside duals don't play well with TST sensors. TST has a particular brand they recommend; you need to call them.
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I instead tried to tighten the sensor more, I just twisted the sensor apart = $$. 
I only use an extension to add air, then remove and replace in toolbox.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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04-18-2022, 01:25 PM
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#11
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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Quote:
Originally Posted by jcmptn1
Has anyone had this issue. Tire is fully inflated and I put on flow thru sensor. The next day the tire has lost air and down to like 45. This has happened twice. Have rechecked tire with guage and it reads same as TST does. Tire is rear inside tire. Have never had any issues with this tire before on other system I was using. I have changed to TST system and this is the first I have installed. No other problems with sensors.
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How did you verify that it is for sure the sensor and not a valve stem or something in tire?
__________________
2007 Fleetwood Revolution LE 40V
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