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Old 09-23-2013, 06:44 PM   #1
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Tire valves on 2013 Freightliner chassis?

The tire valve/valve extensions on the outside rear duals of our new 2013 Fleetwood Excursion are rotated 180 degrees through the holes in wheels. Taking the valve cap off and on is difficult to do if you don't lay down. Can one loosen the lock nut and just rotate the valve so it points outward or is this a job for a truck tire specialist?
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Old 09-23-2013, 07:03 PM   #2
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The tire valve/valve extensions on the outside rear duals of our new 2013 Fleetwood Excursion are rotated 180 degrees through the holes in wheels. Taking the valve cap off and on is difficult to do if you don't lay down. Can one loosen the lock nut and just rotate the valve so it points outward or is this a job for a truck tire specialist?
I had that done on my expedition. VERY quick thing to do, BUT it was done by an experienced tech. Given the pressures and weights involved I would be very hesitant to do so myself. Depending on other postings, feel free to PM me, and I can put you in contact with the person who did mine: I feel sure he would be willing to talk to you about how / whether to do so yourself. (And yes, it made a huge difference for me!)
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Old 09-24-2013, 11:41 AM   #3
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It's supposed to be done with the tire dismounted (I had mine done that way when new tires were installed). Not sure how risky it is to try to do that with a full head of air pressure in the tire.
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Old 09-24-2013, 06:02 PM   #4
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Yes you can if they will swing out of the holes - I did mine but they were not through the rims. Loosen slightly the nut at the base and rotate to the position you want and retighten. The nut requires very little loosening for to move. Turn the valve on its axis - don't lift or push down on the end. It will take less than 30 seconds.
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Old 09-24-2013, 07:05 PM   #5
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I would support the axle and let all but 10 to 15 psi out of the tire. 10 psi should help keep the valve pressed against the wheel and the tire beads seated. Supporting the load should keep the tire from de-seating from the rim.
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Old 09-24-2013, 08:41 PM   #6
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I would support the axle and let all but 10 to 15 psi out of the tire. 10 psi should help keep the valve pressed against the wheel and the tire beads seated. Supporting the load should keep the tire from de-seating from the rim.
Ummmmm .... I am not sure how safe for the long run it is to let the pressure down that low. Any tire techs with experience to chime in on that question?
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Old 09-25-2013, 07:10 PM   #7
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I had a valve stick open on mine and let most of the air out. When the tire place I bought them at came to fix it I ask him if he could turn mine out on both sides. He did it right there on he other side with letting air out first, then he checked and added what little came out when he turned them around.
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Old 09-25-2013, 07:20 PM   #8
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Ummmmm .... I am not sure how safe for the long run it is to let the pressure down that low. Any tire techs with experience to chime in on that question?
If the weight is supported on jacks then there is no problem letting ALL the air out. If you don't remove the weight, then yes, there can be problems like the tire beads unseating or damaging the cords, even steel ones.
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Old 09-26-2013, 01:01 AM   #9
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Ummmmm .... I am not sure how safe for the long run it is to let the pressure down that low. Any tire techs with experience to chime in on that question?
I don't think you grasp the irony. You're asking for a "tire tech with experience". I guarantee you there is no one on this forum with more tire knowledge and experience than Tireman9.
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Old 09-26-2013, 01:18 AM   #10
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If you're needing to do that anyway you should replace those L O N G stems with stubby ones. Makes polishing aluminum wheels EASY. Still need to break one bead to access the stem.
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Old 09-26-2013, 10:37 PM   #11
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I don't think you grasp the irony. You're asking for a "tire tech with experience". I guarantee you there is no one on this forum with more tire knowledge and experience than Tireman9.
appropriate point, thank you for making it - I will have to admit to having made that posting quickly without really reading the moniker of the poster (they don't always represent someone's profession). The pressures in these tires SCARE me, so I wanted to urge caution. Regardless - Tireman9, please accept my sincere apologies, and know that you have my respect for your experience in this area.
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Old 09-27-2013, 09:02 PM   #12
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appropriate point, thank you for making it - I will have to admit to having made that posting quickly without really reading the moniker of the poster (they don't always represent someone's profession). The pressures in these tires SCARE me, so I wanted to urge caution. Regardless - Tireman9, please accept my sincere apologies, and know that you have my respect for your experience in this area.

No problem. We all get carried away sometimes.
Here is the math. Calculate the area of a tire using the OD for diameter. 2nd subtract the area of the rim using 22.5 as the diameter.
Lets take a 235/80R22.5 as an example 37" OD so area is about 1075 Sq Inches. Rim is approx 397 Sq in so the tire is 1075-397 or 678 Sq in.
Times the inflation of 10 PSi we are looking at 6780#
I don't think we have to worry about de-seating the tire from the rim.

You may note I did say the load should be taken off the tire so it doesn't de-seat. It may be possible to rotate the valve with a higher inflation but without actually trying it I don't know as I have no way of knowing how much "set" there is in the rubber grommet that retains the valve. The "set" will make rotating the valve more difficult.


Bottom Line. Whoever mounted the tires and installed the valves originally did not do a competent job. I would not use that tire dealer again.
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Old 09-28-2013, 12:53 PM   #13
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No problem. We all get carried away sometimes.
Here is the math. Calculate the area of a tire using the OD for diameter. 2nd subtract the area of the rim using 22.5 as the diameter.
Lets take a 235/80R22.5 as an example 37" OD so area is about 1075 Sq Inches. Rim is approx 397 Sq in so the tire is 1075-397 or 678 Sq in.
Times the inflation of 10 PSi we are looking at 6780#

. . .

Bottom Line. Whoever mounted the tires and installed the valves originally did not do a competent job. I would not use that tire dealer again.
Impressive numbers. Even more so when you think that at a running pressure of more like 100psi, the number becomes something more like 67,800#. Ouch.

Re. the dealer - in my case the rims came from Fleetwood like that (and I think that was also the case with the OP). Not much to do except fix it when you get it under those conditions I guess.
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Old 09-29-2013, 09:22 AM   #14
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Impressive numbers. Even more so when you think that at a running pressure of more like 100psi, the number becomes something more like 67,800#. Ouch.

Re. the dealer - in my case the rims came from Fleetwood like that (and I think that was also the case with the OP). Not much to do except fix it when you get it under those conditions I guess.
67,800# is why inflating tires incorrectly is dangerous.

A run low flex failure even in steel body tire is pretty impressive.

READ the safety warning molded on the side of many tires.
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