tire pressure monitoring systems - Fiberglass RV


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Old 09-30-2012, 03:17 PM   #1
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tire pressure monitoring systems

Is anyone here using a tire pressure monitoring system? It seems to me that, with tire blow outs being a common problem, this may be a good preventive measure. Thoughts?

Lawrence RV Accessories Inc

How many blow outs are actually disguised bearing failures? Damaged bearings could cause strain on the tire, and cause a blow out. If this were true, ythe tire pressure would be irrelevant to the tire failure. Thoughts?
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Old 09-30-2012, 03:36 PM   #2
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Derek,

I use a Tyre Dog Pressure monitoring system, a relatively inexpensive system. It comes with four sensors that mount on the valve stems. They have worked perfectly for about 30,000 miles.

My car is a 2004 and does not have a built in Tire Pressure Monitoring system. As a result I put two sensors on our Scamp and two on our rear tires. The sensors measure pressure and temperature.

The sensors report the state of the tires to a monitor that mounts on the dash.

As of yet they have not reported any pre=blow out conditions since our Goodyear Marathons have never had a blowout, year 5 and on our second set.

As well every time we stop I walk around and touch each hub and tire.

As we progressed around the country we did see the pressure vary significantly, partially due to temperature. The monitors did encourage us to top off the tires on occasion. As well it's interesting to see how the temperature varies during the day.

I have personally never heard of a bearing failure causing a blowout. I have an infra red temperature sensor and mainly out of curiosity I can take a quick bearing temperature.

Hope this helps
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Old 09-30-2012, 05:21 PM   #3
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Derek,

I use a Tyre Dog Pressure monitoring system, a relatively inexpensive system. It comes with four sensors that mount on the valve stems. They have worked perfectly for about 30,000 miles.
My guess is that the temperature sensor would point you toward any bearing failure type issues. Has anyone actually had bearings go bad while underway? What happened?

Derek
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Old 09-30-2012, 06:58 PM   #4
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Any thing that mounts on the end of tire stems is a BAD idea. First off the stem has a Schrader valve inside that is designed to improve sealing with pressure. The thing you put on the end opens the Schrader valve, thus defeating it's intended purpose.
Because of the design of the valve stem attempting to seal against the rim of stem requires excessive pressure on the seal, and the air pressure inside the tire instead of helping the seal is now working to create seal failure. I that makes sense.
Another issue is the additional weight on the end of the stem. To prevent cutting the stem where it comes through the wheel a metal stem would needed. You also have a tire balance problem, and your would need to be balanced.

All in all it's much easier and just as effective to check the tire pressure in the morning before towing.
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Old 09-30-2012, 07:15 PM   #5
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I've used the stem installed monitoring system for a couple of years with no air loss. It monitors the tires on the camper and the truck. It will alarm should the pressure go down or if there is a sudden change in temp. They sell the system at Camping World however I purchased from a company on the internet for better pricing. I cant remember if they are DOT approved.

Prior to installing this new system I had the mechanical Stem pressure sensors and used them in excess of 5 years with no problems also. The built in seal prevents the air loss.
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Old 10-01-2012, 01:59 AM   #6
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I've used the stem installed monitoring system for a couple of years with no air loss. It monitors the tires on the camper and the truck. It will alarm should the pressure go down or if there is a sudden change in temp. They sell the system at Camping World however I purchased from a company on the internet for better pricing. I cant remember if they are DOT approved.

Prior to installing this new system I had the mechanical Stem pressure sensors and used them in excess of 5 years with no problems also. The built in seal prevents the air loss.
Hey Darwin, How many times has that system alarmed indicating a low tire?
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Old 10-01-2012, 06:30 AM   #7
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Our Stem mountrd sensors have not allowed air to escape.

We have received a low pressure system alarm a number of times, usually in the morning when there has been a significant temperature drop. As we progressed from south to north, we added air.

Before I purchased these sensors I was a regular tester of our tire pressures, way less frequently now. My purpose for the sensors is to be forewarned of a blowout, to see if there is some warning charactereistic of tire pressure and temperature. I am still regularly visually check the tires at each stop.

When you read the site there seems to be general concern about tires. Though my tire experience has been excellent, I decided to add an extra level of security.
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Old 10-01-2012, 07:55 AM   #8
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preventitive maint. and monitoring works and is free.

lube your bearings every spring.
check you tires every trip for preasure,dammage.
stop at the 100 mile mark on every trip and check everything again, only takes a moment.
ever time you step out of your tug, walk around and touch your hubs. that way you know how warm they should be , and can quickly spot a change.
if you stop for awhile,,, check your tires before you head out again.

and the most important part of preventing tire and bearing failure,,,, remember you have to deal with that "your an idiot" look from the wife if you screw up and forget to check your tire preasure, and have a blowout.
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Old 10-01-2012, 09:04 AM   #9
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John,

I do all that you suggest however I am willing to spend $100 just to see what's happpening 'live'.

It's similar to the reason I added an Ultra Scan gauge. I'm certain continuously seeing mpg helps get better mileage. Unfortunately my car is too old to directly display that function.
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Old 10-01-2012, 09:16 AM   #10
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Schrader cores are designed to hold air pressure while providing easy access to check or adjust pressure... nothing more.
A well designed device which is used to visually monitor air pressure can be used with a comparable level of reliability, while adding no more weight than some valve stem caps alone.

Reliance on TPMS can be troublesome since the resultant complacency could easily result in the neglect of visual and tactile checking of tires and other systems. While handy and reassuring they do little to warn of impending catastrophic tire failure.
It is unlikely that impending bearing failure would cause tire failure or vise-versa. Any incident in which both occurred simultaneously would be both extremely rare and coincidental.
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Old 10-01-2012, 10:38 AM   #11
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Byron, I respect your opinion concerning this subject. In answering your question:

ave never had them alarm. I check tire and hub temp with an IR thermometer at each stop and I checked the tire pressure after a 5000 mile trip and again after 1 year of installation with no air loss.

The following site gives a 5 star raiting of the system.

TireMinder Tire Pressure Monitoring System - Minder Research Inc TMG400C-4 - Tire Accessories - Camping World

Floyd: The visual monitor gives a pressure and temp readout of each tire. Yo do however have to page through each tire individuality and I do that at each stop. One thing I notice is that the tires on the sunny side are running hotter than the ones on the opposite side so this gives me peace of mind that the temp function is really working.

The cost is a little high but for me it was worth it.
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Old 10-01-2012, 10:51 AM   #12
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Our TPMS also shows sunny side versus shade side differential. Ours shows pressure on all four tires simultaneously, pushing a button shows all 4 temps simultaneously.

Tyre dog is limiting in that it only covers the trailer tires and the Honda's rear tires. Cost was around $150.

I wonder if the sensor would catch a blowout. On our motorhome is seems you would sometimes get a bubble, resulting in some level of pressure decrease, maybe not detectable.....
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Old 10-01-2012, 11:01 AM   #13
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Quote:
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Schrader cores are designed to hold air pressure while providing easy access to check or adjust pressure... nothing more.
A well designed device which is used to visually monitor air pressure can be used with a comparable level of reliability, while adding no more weight than some valve stem caps alone.

Look carefully at a Schrader valve. The higher the gas pressure the tighter the seal. This what you want when dealing with any gas, air or otherwise. In the case where the tightness of the seal is determined by the tightness of threads there's a greater chance of gas leakage. Pneumatics 095.
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Old 10-01-2012, 01:27 PM   #14
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The sensors have a locking screw to prevent them from loosing up.
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