tireman9

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About tireman9

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  • Location
    Akron, OH
  • Interests
    Genealogy, Travel out West. Tires
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    Part-time

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  1. New Michelin tire

    I have no personal knowledge of the MultiZ but looking at the Michelin web site I see they mention the arrows on the sidewall. This is a "semi-directional" tire meaning it should rotate in the direction of the larger arrow unless you have an irregular wear problem when you can reverse the direction. They also say " Improved all-position radial optimized for RV chassis and specialty trailer in regional and line haul applications " Sounds like a good application
  2. spare tire on class a

    For Class-A I suggest you carry a used tire not mounted and have road-side service. Having the used tire is always going to save you money vs paying for whatever the service guy has. No need to have it mounted as service can do that on the side of the road. This also means you can store stuff inside the tire. Not all Class-A have a basement large enough (Shame on the MFG). Class-C and Class-B can carry a mounted spare BUT be sure you have the tools that can handle the weight of the RV. I would be concerned for some units as you may not be able to jack up an axle on the side of the road so having road service is a good idea. I have changed my tires at home so I know the tools and jack are strong enough. Also have a 8"x8" plate to give the bottle jack extra stability. maybe this is a topic for a Tech Tip ?
  3. Tire Inflation

    There is no problem running a LR-E at 65 psi if that is the rating for your wheels. BUT Simply stating the GVWR is no indication of the actual load on the tires. I have covered proper inflation of Trailer tries a number of times, in detail in my Blog. Basically, run the inflation on the tire sidewall. BUT in your case, that would be 65 psi. You also need to confirm your actual load is less than 85% of the Max load capacity for your size tire (at 65 psi). or 2,083# on the heaviest loaded tire. You can PM me if you need clarification for your situation. BTW, when you upgraded your tires did you get bolt in metal valves installed too?
  4. Small inverter low AC voltage ?

    I have a small Husky 750Watt "modified sine wave"inverter I use to occasionally run AC powered items. The AC items do not seem to be putting out their full power. Using a small digital multi-meter the inverter output shows 91V with load or no-load. Checking with a small AC analog gauge that I use to check the voltage at outlets in the RV when plugged into shore power the Inverter shows 128 V with no-load. Is the low reading to be expected as the meters are giving the RMS value?
  5. Tire Blowout Experience

    OK so now we have two completely different types of failure. The one from Mike L. has a suspect mark I would need to see up close before I can offer my expert opinion. I have requested a couple of better pictures. The tire from csiemen is clearly a belt/tread separation and no TPMS is going to provide warning of this type of failure. es 5 years is shorter than I would expect for tires that had always been inflated to 75/80 psi. You didn't mention what your scale readings for the coach.
  6. Continental Recall 315/80R22.5

    Please click on the following NHTSA Recall ID links to view the recall information. Note: If you did not receive a notice directly from NHTSA or Continental tire then your tire dealer failed to properly register you as the owner as required by Federal Regulation. I covered this topic in my RV Tire Blog HERE. If you have a Michelin, BFG, or Uniroyal you can go HERE to register your tires or contact your tire dealer and ask them for the appropriate form. NHTSA Recall ID Number : 18T008 Synopsis : Continental Tire the Americas, LLC. (Continental) is recalling certain Conti Coach HA3 tires, size 315/80R22.5 157/154 L, with DOT codes A372KWUU 3517 through A372KWUU 1618. These tires may have cords visible through the innerliner. Tires that have cords visible through the innerliner can have sudden air loss, causing a loss of vehicle control, increasing the risk of a crash. Continental will notify owners, and dealers will install equivalent tires, free of charge. The recall is expected to begin in July 2018. Owners may contact Continental customer service at 1-800-726-7113.
  7. Tire Blowout Experience

    Can you get a close-up, in sharp focus shot of the sidewall area just to the right of the blade of grass as seen in the 2nd picture. I see something but need a better picture. Full sunlight in highest quality covering an area about 6" to 8" square should do. It is very unusual for steel sidewall to simply fail without some external or prior damage. In 5 years have you ever needed to add more than 5 or 10 psi to any of the tires for any reason?
  8. Tire Blowout Experience

    Correct, TPMS is only designed to warn of air leaks and cannot warn of impending belt/tread separations. This is why it is suggested that Motorhomes have their tires fully inspected by a dealer that sells the brand in question annually starting at 5 years. A complete inspection by a competent person should allow any out of round or side to side run-out to be observed. Both of these are signs of potential belt/tread separations. I show how and the results of such an inspection in my blog.
  9. Slow Air Leak

    Wondering why you were removing the TPM sensor to "check" the inflation. Also how the inflation got down to 60 without the TPM sounding off. In my RVTire blog, I have a number of posts on tests for accuracy of various TPM sensors and have found the dozen sensors I tested, to be acceptable. So the only time I would have a sensor off is when doing the initial pressure setting and maybe a couple of times a year like in late Fall and Early Spring when there are large changes in temperature. Different TPMS have different settings for the low-pressure warning level but I suggest the low-pressure level should be set at the minimum inflation needed to support the measured tire load. You will need to read your system instructions and maybe do a little calculating but you should be able to do it. One of the reasons I suggest the CIP be set to your minimum +10% is that will give you margin so the day to day effect on tire pressure due to temperature change should mean you don't need to. With pressure changing 2% with a change of 10F you would need a 50F drop before you would need to add any air. Since tires can tolerate both temperature and pressure rise you don't have to "chase your tail" every day messing with tire pressure even when the temperature rises 30 to 50F
  10. Tire Inflation

    Sorry, Wayne but there are ways to identify the probable inflation & load history of a tire. Just as a Medical Examiner can do an autopsy and identify the signs of bad diet and poor or no exercise, or years of smoking, it is many times possible to see the external signs of low inflation and high load. These signs can show up in the indentation into the tire left by the wheel. Also, the different flex markings can be seen on the interior of a tire. Manufacturing "Defects" will usually result in early life failure i.e. <1,000 miles. Tire failure is in itself not proof of some nebulous "defect" even though lawyers and those not experienced in failed tire inspection want to think so. Once you examine, in detail, a few thousand tires from both controlled testing and from day to day use & abuse the conditions seen in tires tell a story of the tire's history. Too often people simply think of the conditions (load, speed, inflation, road) at the moment the tire fails as the "facts" to be considered when trying to decide the "why" a tire failed. In reality, the damage might have been done hours, days or even months earlier. As I point out in my RV Tire Knowledge Seminars at FMCA Conventions, tires are like potato salad, putting the salad back in the refrigerator after it was left for hours in the hot sun does not "fix it" and make it good to eat the next day any more than taking the burnt hot dog off the grill and letting it cool down before serving it makes for a good meal. Adding the correct air in a tire after running it low for thousands of miles does not repair the damage. Slowing down to 50 after hours of 70 to 80 over the preceding weeks and months does not "fix" or heal the thousands of microscopic cracks that were formed in the overheated and overstressed belt rubber. If a person stopped his smoking addiction of 2 packs a day for 40 years a couple months ago, will his lungs be clean and clear today?
  11. Tire Inflation

    I have covered the question of Multi-Axle trailer tire inflation ( run the sidewall pressure as your CIP ) along with the engineering analysis behind this recommendation in my blog RVTireSafety.com I have also covered the question of max operating speed (65 MAX) as the load formula for St type tires has not been changed since the early 70's. Speed "Rating" is just like your engine "Red Line" rating. You can exceed it but you will end up with a shorter tire or engine life.
  12. Slide Safety Lock after system failure

    Can't be 100% sure about "structural" support. I just assumed (hoped) that Coachmen has a structure right around the opening. I always have a roll of "Racer-Tape" aka "duct-tape" in the toolbox and that would help keep boards centered. Probably could have used 1x3 set vertically but had scrap 2x4 laying around and have "dead storage" space under dinette seating.
  13. Slide Safety Lock after system failure

    Well, they only have to work long enough to get home. Also, they are a "snug" fit and I need to pound on them a little to get in place. But thanks for the observation. I just hope I never have to use them. maybe these are like carrying an umbrella so it never rains.
  14. Tire Blowout Experience

    Sorry to hear about your tire problem. Didn't your TPMS give a low-pressure warning? Any chance you can share a few pictures of the failed tire. I like to help provide a possible suggestion on the "Why" a tire failed. I also am a bit surprised by only 5-year life, unless the failure was due to some non-tire issue such as leaking valve or valve core. I am guessing your tires are LR-E and say 80 psi on them. I suggest you run 80 as your Cold Inflation Pressure till you can confirm your actual tire loading.
  15. I have Schwintechslide on my coach. I have watched the various You Tube videos on how to change the motor etc. If the system fails when the slide is in I can probably just live with it till I get home but if it fails when out I am stuck. Removing the motors also removes the "lock" that holds the slide in. My back-up and work around it simple as a couple of 2x4's. I believe that with the help of some fellow campers I will be able to get the slide in without the motors but then I need to make sure it will not slide out as I drive home. The 2x4's just fit to hold the slide in. They don't take up much space and can be stored anywhere as I do not expect to ever need to use them. Here is what it looks like with the "Lock" in place.