TST 507 sensor question

Sorry, I thought when you said it was working fine, that everything was okay. I got a bunch of extra O-rings with my TST TPMS, but haven't needed them yet. Only thing I've had to do is replace the batteries, but they've lasted a long time. I do remove them over the winter when it's in storage.

fj12ryder wrote:

Ron3rd wrote:
I've got the TST 507 system, about 5 years old and it works fine. I want to replace the little valve stem seals in the sensor (where it seals against the valve stem) and my question is; how do you get the old seals out??!! I'm using a small pick and it's being difficult. For those of you that have replaced these seals, any tips are appreciated.

Why do you want to mess with it if it's working fine? Never forget the old adage: "If it ain't broke, don't fix it".

Get where you're coming from, but it is "broke". Seals have broken down and leaking, causing alarms after 5 years. I've never replaced them. It's time now and I figured it out; you need a small curved dental pick to get the old ones out. New ones are forced in, they sit in a counterbore; it's not intuitive but I got it going.

TST gave me extra seals when I bought the unit but they did not look right for the application. Got the old ones out and they're the same as the replacements, so I got it figured out and all is well. TST btw has no heads-up on this online, but overall it's a very good system and I otherwise have no complaints.

John Wayne wrote:
When you get the new seals in .Take an old valve stem put a SMALL amount of anti seize on the stem and screw on the sender putting a small amount of anti-seize on the seal. This will prevent the seal from tearing when being screwed on. Repeat every year if you take them off between trips.

Good tip, thanks.

Ron3rd wrote:
I've got the TST 507 system, about 5 years old and it works fine. I want to replace the little valve stem seals in the sensor (where it seals against the valve stem) and my question is; how do you get the old seals out??!! I'm using a small pick and it's being difficult. For those of you that have replaced these seals, any tips are appreciated.

Why do you want to mess with it if it's working fine? Never forget the old adage: "If it ain't broke, don't fix it".

When you get the new seals in .Take an old valve stem put a SMALL amount of anti seize on the stem and screw on the sender putting a small amount of anti-seize on the seal. This will prevent the seal from tearing when being screwed on. Repeat every year if you take them off between trips.