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Old 12-31-2015, 04:25 PM   #1
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TPMS

Getting ready to leave the FL Keys tomorrow morning for Beverly Beach and another few days on the ocean. As usual, went around doing what needed doing ahead of time. When I turned on the TST 507 system, one tire would not come on line. Pulled the sensor off the stem and found the VERY TINY "O" ring missing. Gone! I have no clue where! ALL of the air had leaked out. Nada! 84lbs when we rolled into this CG.
I always carry an extra supply of O-rings, but nothing this Tiny. I'm talking really small and fat.
Being New Years eve, the two NAPA stores I went to were closed. Found a Discount Auto Parts store open and they had two of the size I needed. Bought both.
Folks, don't take anything for granted when it comes to safety and tires, check them. Mine leaked down because the O-ring [you can barely see it in the sensor] failed. If I had said "OK, it's just a faulty sensor, fix it when I get home", we would be on the edge of the highway somewhere with BIG PROBLEMS.
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Old 12-31-2015, 04:31 PM   #2
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Thanks for the tip. I ordered that system this morning!
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Old 12-31-2015, 04:32 PM   #3
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If the o-rings get old or damaged, they can stick in the valve stem. Look carefully at the valve stem, It is likely you will find the o-ring there. If you contact TST, they will send you some.
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Old 12-31-2015, 04:46 PM   #4
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If the o-rings get old or damaged, they can stick in the valve stem. Look carefully at the valve stem, It is likely you will find the o-ring there. If you contact TST, they will send you some.
TNX FlyBob. I looked everywhere for the old O-ring. If it did get crushed in the stem, it fell out when I removed the sensor to replace the battery not long ago. I hope I didn't tighten it too much to cause the problem as I usually just snug them up enough to keep them from leaking. I'll check it again in the morning before we roll. TST are good folks and I'm sure they would send more O-rings, but at $.50 each, no big deal.
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Old 12-31-2015, 05:20 PM   #5
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Thanks for the tip. I ordered that system this morning!
It's a great system, just carry extra batteries AND "O" rings. Sooner or later, the STS system will save you big problems as it has for us many times.
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Old 12-31-2015, 05:50 PM   #6
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Hi,

My 507 came packaged with a little zip lock bag, containing spare o-rings, gaskets, and those tiny little screws that are so hard to find when you drop them.

Must just be lucky -- I know I was really impressed.

Rich Phillips
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Old 12-31-2015, 06:17 PM   #7
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Hi,

My 507 came packaged with a little zip lock bag, containing spare o-rings, gaskets, and those tiny little screws that are so hard to find when you drop them.

Must just be lucky -- I know I was really impressed.

Rich Phillips
X2 on spare bag. I got the same when I ordered my unit a couple of years ago...
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Old 12-31-2015, 08:33 PM   #8
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Couple of questions about the TST system:

Do the tires need to be rebalanced after installing the sensors, and

Is there any advantage to having the "flow through" model vs non-flow, other than convenience?
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Old 12-31-2015, 08:53 PM   #9
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Quote:
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Couple of questions about the TST system:

Do the tires need to be rebalanced after installing the sensors, and

Is there any advantage to having the "flow through" model vs non-flow, other than convenience?
Mine are TPMS (EEZTire) and are so small and lightweight that no re-balancing is needed. (I didn't get the anti-theft part on them to save on weight.)

I wouldn't buy any without the flow-through because I'm finding the tires need topping off quite often....especially after sitting parked for a long spell.
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