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Post Info TOPIC: Tire Pressure Sensor Fail


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Tire Pressure Sensor Fail


A heads-up on an issue that is likely common knowledge but somehow escaped me: not an unusual occurrence.

I had one of my TST TM 507SE tire pressure sensors fail this weekend.  Since the system was a little over a year old I decided to check the sensor battery.  When I unscrewed the cap the first thing I noticed was the o-ring seals had deteriorated.  I then noticed the battery and battery cage had badly corroded.   I called TST support and was told this is common and is the reason they recommend replacing the o-rings, along with the batteries, once a year.  Hopefully, cleaning the corrosion and replacing the battery will make this sensor work again.  If not, lesson learned.

From what I can tell the o-rings are very tiny and do not look like a standard size.  Does anyone know if there is a source for these other than from TST?  I don’t mind ordering from TST, just prefer picking them up locally.  Actually, TST support told me there should have been replacement o-rings in the original package.  I know I stored them in a place I could easily find them, but where?

Steve



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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First, think of where you would put them now if you had them and were going to store them, then look somewhere else.

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2018 DRV Mobile Suites 44 Sante Fe

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Someone makes the o-rings for TST, who I don't know who, but if you have access to a set of dial-indicator calipers you can measure the OD of where the o-rings sit and then measure the thickness of the cross-section of the o-ring and I'm betting someone on the Internet can supply them. You might want to check out these folks. Don't know anything about them just found them on a search. www.theoringstore.com/index.php Just my two cents.

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I found replacement O-rings for my TST sensors at a True Value hardware store that had a wide variety of them in small segmented drawers. Ace hardware stores usually have similar selections too.

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Dutch

34' 2001 GBM Landau Class A

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vannchan wrote:

First, think of where you would put them now if you had them and were going to store them, then look somewhere else.


 Story of my life.  My wife tells me if I think our destination is left, we should always go right.



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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Thanks for the input but, miraculously, I found the original box and- in the box as advised- there is a plastic bag with replacement o-rings.  I’m going to clean-up the faulty sensor and replace all four batteries and o-rings.  I’ll keep you posted.

I’ll keep those o-ring source suggestions in mind.  There is always something broken that can be fixed with a 10-cent o-ring.



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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Don't know why I didn't think of this sooner, but I now recall that when I took my first trip using this TPMS I went through several heavy rain storms and that same sensor stopped working for a period then came back on line.  I even posted about it piggy-backing on one of Ronc's posts: https://rv-dreams.activeboard.com/t63783210/tpms-success-story/   

I think there is a very good chance this sensor's o-ring was defective from the beginning.  I'm writing TST to see if they will warranty that sensor; they'er $50.00 each.  I'll let you know what they say.

Steve



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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Update:

I emailed TST with my story and was told they would replace the defective sensor.  About a week after mailing my defective sensor to them, I received a new sensor in the mail. Nice customer service.

I am a little concerned about the quality of the o-rings though.  I went ahead and replaced the o-ring and battery on the other three sensors and found that when I unscrewed the caps all three o-rings fell out in pieces.  So all four o-rings appeared to have deteriorated in just over a year.  Has anyone else experienced this?

Steve



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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Interesting report. Thank you for sharing.

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Winnebago TT 2101DS & Tahoe LTZ, 300 watts WindyNation solar-parallel w/MPPT, 2 Trojan T-125s. TALL flag pole. Prefer USFS, COE, BLM, USF&WS, NPS, TVA, state/county campgrounds. 14 year Army vet-11B40 then 11A - old MOS 1542 & 1560.



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I also have the TST 507 TPMS ... FWIW ... I replace each battery in every sensor (along with the O ring) every year. Just part of routine maintenance.



-- Edited by RonC on Tuesday 6th of November 2018 09:06:58 PM

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2016 Ford F350, King Ranch, DRW, 3.73's, 4x4, CC, 6.7 Powerstroke, remote control air lift system

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Full Timers class of 2016



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RonC wrote:

I also have the TST 507 TPMS ... FWIW ... I replace each battery in every sensor (along with the O ring) every year. Just part of routine maintenance.



-- Edited by RonC on Tuesday 6th of November 2018 09:06:58 PM


 Yes, I'm going to have to put that on my maintenance schedule. 

But I'm curious: 1) Do you get your o-rings from TST?, 2) Are the o-rings deteriorated and falling apart when you unscrew the sensor cap?  That's what really surprised me; how bad all the o-rings looked after 14 months of part-time service.  In a former life I was a mechanic and I have never seen o-rings deteriorate in that short a time.  

 

Steve



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2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan



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Steve,

I'm with you. I don't think that the o-rings should deteriorate within a year or so. Like you I've seen o-rings last a long time, sometimes decades.

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I do get my O rings from TST. They are the water seal between a twist on cap and a stationary body. Doesn’t surprise me that they would be “one and done”. Mine aren’t crumbling, but they look in bad enough shape that they probably wouldn’t water seal anymore.

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Ron and Janice

 

2016 Ford F350, King Ranch, DRW, 3.73's, 4x4, CC, 6.7 Powerstroke, remote control air lift system

2017 Durango Gold 381REF (41 ft, 5 slides), MORryde IS, 8K Disc brakes, GY G114  LR H Tires, 27,320 lbs CGVW

Full Timers class of 2016



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I'm thinking that a very light coating of silicone grease on the o-rings may alleviate some of the galling and likely add to their sealing ability. Just at thought.

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arcaguy wrote:

I'm thinking that a very light coating of silicone grease on the o-rings may alleviate some of the galling and likely add to their sealing ability. Just at thought.


 You are probably right ... sounds like a good idea, but the O rings are not very expensive so I just consider them a consumable.



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Ron and Janice

 

2016 Ford F350, King Ranch, DRW, 3.73's, 4x4, CC, 6.7 Powerstroke, remote control air lift system

2017 Durango Gold 381REF (41 ft, 5 slides), MORryde IS, 8K Disc brakes, GY G114  LR H Tires, 27,320 lbs CGVW

Full Timers class of 2016



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Yes, the o-rings probably should last longer but, for me, the real take away here is that TST stood behind their product.  There are many companies out there that will look for any excuse to not warranty their product.  Their customer service was great.

 

Steve



__________________

2017 Starcraft 26BHS Autumn Ridge TT,  2004 Toyota Tundra TV 

Plan to retire/full-time in 2021. Favorite place to camp; Texas State Parks.

Travel is fatal to prejudice, bigotry, and narrow-mindedness..  Mark Twain 

Steve, Julie and Ethan

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