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Old 04-07-2013, 07:53 PM   #11
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Thank you for sharing all this work jadatis. I'm going to have to take a half day just to review it and sort out where my tires fit in.

I did check them today and found they were low. Just had it serviced, and thought that inflating the tires was part of a general look over that comes with chassis service, guess not.

Roll
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Old 04-10-2013, 05:40 AM   #12
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I placed all the PDF's in a map on my public map of skydrive.
https://skydrive.live.com/?cid=a526e...E092E6DC%21904
See if i can put a manual in it too.
Beter even make my own topic about it.
With explanation of how to use.
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Old 04-10-2013, 11:56 AM   #13
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Okay jadatis I need some help with this.

I have 235X80 22.5 Michelin XZV tires, load range G (14 ply)

I can only give you axle weights since I have not been able to weigh each wheel as yet.

Front axle: 6880 (assume 3440 each wheel) Axle is rated for 8000 lbs.

Rear axle: 13200 (assume 6600 each duel wheel set) Axel is rated for 15,000 lbs.


I read the Michelin chart for my tire in the follow tire pressures:

Front: 70 psi required by the Michelin chart; I add 10 psi for safety and inflate them to 80 psi.

Rear: 75 psi requied by the Michelin chart; I add 10 psi for safety and inflate them to 85 psi.

So how far off am I in your inflation charts? I have tried to figure this out based on your charts but can't seem to get the hang of how you are doing this.

Roll
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Old 04-10-2013, 12:40 PM   #14
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Quote:
Originally Posted by Roll View Post
The weight/pressure chart was posted elsewhere but done so by me off topic and so hard to find.

So in one thread here is the Tire pressure/axle weight chart previously posted and new is a 24 page Michelin brochure with quite a bit of useful information.


Roll
Here is another. I am told by Goodyear that all tires are supposed to meet the Tire & Rim association chart regardless of brand. The Tire Load Inflation table even shows the 17" tires.
Attached Files
File Type: pdf Tire Load-InflationTable.pdf (1.31 MB, 16 views)
File Type: pdf Tire Pressures.pdf (140.2 KB, 9 views)
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Old 04-10-2013, 02:31 PM   #15
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Quote:
Originally Posted by Roll View Post
Okay jadatis I need some help with this.

I have 235X80 22.5 Michelin XZV tires, load range G (14 ply)

I can only give you axle weights since I have not been able to weigh each wheel as yet.

Front axle: 6880 (assume 3440 each wheel) Axle is rated for 8000 lbs.

Rear axle: 13200 (assume 6600 each duel wheel set) Axel is rated for 15,000 lbs.


I read the Michelin chart for my tire in the follow tire pressures:

Front: 70 psi required by the Michelin chart; I add 10 psi for safety and inflate them to 80 psi.

Rear: 75 psi requied by the Michelin chart; I add 10 psi for safety and inflate them to 85 psi.

So how far off am I in your inflation charts? I have tried to figure this out based on your charts but can't seem to get the hang of how you are doing this.

Roll
Then first I determined the maximum load of such a G-load tire with 110psi as reference-pressure, in the list of michelin, and found the maximum load there to be 4675 lbs for single load and 4410 for dual load.
At loadindex 134/132 as is searched back in my list.
there it is 4674/4409 but this is because it is conversed from kilo in my system, but these you have to use.


Then I determine the weight to search back in those lists.
6880+10%=7568lbs front, searched back to be yust between 85 and 90 psi
so your 85 will doo but 90 is even saver.

Back: for that I use half of the GAWR of 13200= 6600 for not having to open the dual pdf ( lazy) 6600+10%=7260lbs and found 90psi too at 7315 lbs
Look back in the picture included .

So my advice for fully loaded axles is front 90 psi front and back.
If by weighing appears that the loads are much lower in real use, add 10% to that and look back. front LI 134 list and back LI 132 list.

But now I realize I used the lists that I made for my seperate topic in the technical section. Will submit this reply and edit the link to that topic.
Chached some to the lay out.
Here the direct link to the map on my skydrive with all the PDF's .
https://skydrive.live.com/?cid=a526e...E092E6DC%21904

Edit: saw I already gave the direct link to the map, but here the link to the topic
Pressure/loadcapacity-lists
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