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-   -   Tms (https://www.airforums.com/forums/f539/tms-211097.html)

Powerrunner 07-12-2020 06:18 AM

Tms
 
I am sure this is covered somewhere in this site, but i am unable to locate it. My question I have a 2019 International Serenity 30í. I would like to add a Tire Pressure Monitoring System. What do you use/recommend and why?

Hans627 07-12-2020 06:24 AM

We use the TST TPMS (as shown here https://store.airstreamlife.com/coll...your-airstream)

It has worked well for us and many others.

DCPAS 07-12-2020 06:55 AM

I have a TireMinder Trailer TPMS https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1. It works well and has been reliable. My only complaint is that the display goes really dim after a short while. It says its pressure range max is 70 psi. I have been keeping the tires at 80 psi (I had bought the system for a different trailer) and it still works. It has a signal booster, which is needed. When I tried using the system without the booster, I got several dropouts. After I installed it on the underside of the battery box, I get no dropouts.

GCinSC2 07-12-2020 07:03 AM

Two basic ideas, external monitor that threads on to valve stem and internal transmitter.

Dill offers an internal system that monitors PSI and internal tire temp. I'm on my second Dill system and finally had to have the transmitters replaced. Drawback is tire demounting to R&R transmitter is required. Discount Tire did my replacements for cost of transmitters only as tires were purchased from them. Positives, it's all internal no valve stem concerns and temp is monitored internally. Receiver and display have several mounting options.

Either system watches out for in route issues that likely wouldn't alert driver until too late. Don't think of it as a replacement for pre trip PSI check.

Gary

GMFL 07-12-2020 07:26 AM

Dill system for me. Works great with internal sensors. No batteries to change or sensors to loose. Just change the sensors every other tire change.

Mollysdad 07-12-2020 08:20 AM

TST with four cap sensors.
Best upgrade ever!

Powerrunner 07-12-2020 11:20 AM

Quote:

Originally Posted by Hans627 (Post 2382352)
We use the TST TPMS (as shown here https://store.airstreamlife.com/coll...your-airstream)

It has worked well for us and many others.



Thanks, did you end up changing the valve stems out to steel stems?

Hans627 07-13-2020 05:58 AM

Quote:

Originally Posted by Powerrunner (Post 2382514)
Thanks, did you end up changing the valve stems out to steel stems?

No. I plan to do so when I replace the tires. TST claims the partial rubber stems can be used with the 507 sensors. Many have replaced the partial rubber stems with all steel and there certainly is no harm in doing so.

One thing I've done is to remove the "security" cap and use just the sensor. Thus making it a bit lighter and smaller in diameter.

BayouBiker 07-13-2020 06:25 AM

To get the most out of pressure and temperature monitoring, note that the location of the temperature sensor even for the internal models are less than ideal so they will provide temperature changes but they will not provide an accurate absolute temperature while on the road. They will give you wheel temperature at best and valve stem temperature at worst.

So use the temperature to set cold tire pressure as long as the tire is shaded.

On the road watch tire pressure, note the cold tire pressure and then figure for each 10 degrees F increase in internal tire temperature pressure will rise about 2%. So if you start at 60 psi and they rise to 66 psi after driving for an hour that is 10% increase or a 50 degree increase in internal temperature.

Your tires should only gain 25-50 degrees while traveling.

Over 50 and the cold pressure is a bit low so sidewall flex is excessively heating the tire. Add a couple psi and your tires will thank you. Under 25, while great for the tire longevity, it may be a bit stiff and rattling the trailer content. It's a judgement call on what to do here.

GCinSC2 07-13-2020 07:22 AM

Brian,

A few years ago driving around Charlotte NC my monitor warned of one wheel that was warming up. It didn't go to ALARM it just showed a higher temp. Pulled over and shot the wheels with IR temp gun sure enough one was hotter than the rest. But it was the brake rotor of the disc brake system that was the heat source.

I had a good set of tools, found a parking lot, pulled the wheel and the pad was dragging on the caliper. A bit of cleaning and dab of grease took care of it. It was my fault for not cleaning the pads and caliper anchor. I did all four at the same time and continued to destination no issues.

A dragging drum brake likely would set off the same warning.

That internal temp sensor prevented a potentially more serious higher temp issue.

Advice to non TPMS owners, consider some type of TPMS.

Gary

Mollysdad 07-13-2020 08:51 AM

Quote:

Originally Posted by Powerrunner (Post 2382514)
Thanks, did you end up changing the valve stems out to steel stems?

Yes. Dill 902-W. The tires don't need to come off the rim, just one side bead pushed in to install.
Standard valve stems don't fit in our aluminum rims.

I did my own:
https://www.airforums.com/forums/f31...ml#post2382971

thewarden 07-13-2020 10:21 AM

I have used the TST system for the last 4-5 years and I am very happy with them. I use the Dill 902 W valve stems as well.

Powerrunner 09-20-2020 05:06 PM

1 Attachment(s)
Quote:

Originally Posted by Powerrunner (Post 2382351)
I am sure this is covered somewhere in this site, but i am unable to locate it. My question I have a 2019 International Serenity 30í. I would like to add a Tire Pressure Monitoring System. What do you use/recommend and why?



Installed the TST and love the system. I just installed the repeater. See the picture.Attachment 379122

FishByFly 09-20-2020 07:12 PM

What did you wire the repeater. Iíve got one too and not happy with my wiring approach.

Powerrunner 09-20-2020 07:22 PM

Quote:

Originally Posted by FishByFly (Post 2412785)
What did you wire the repeater. Iíve got one too and not happy with my wiring approach.



Just pulled the wiring into the battery box, connected the + and - leads to the terminals. Nothing special, i am going to install a switch to power off the repeater, in the meantime I just pulled out the fuse.

FishByFly 09-20-2020 08:51 PM

I wired mine into my power jack. Installed under the Jack cover...good bit of room in there. Added a switch into the jack cover so I can switch it off. I forget to turn the switch on until I get a few miles down the road and see the tires not registering.

jeffmc306 09-29-2020 09:50 PM

Wired repeater to running lights - no switch necessary
 
3 Attachment(s)
I also installed the repeater on the outside of the battery box and connected the positive wire to the running lights (green wire). This way the repeater is powered only when the umbilical is connected and the running lights are on. Easy-peasy! I know it works without the repeater but the TST manual says it should be installed.

*I followed the umbilical cable into the cabin and replaced the connector with a Wago 3 conductor. Pulled a single conductor wire through the existing flexible black wire cover.


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