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Look at the rut my bus left this morning!
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Tim T I think you called it.
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From what I could see in the picture
above it didn’t look like inside drive tire was “making a good
impression”. Easy enough to check. -
The next time I back up should I raise the Tag, would that stop the trenching? I’ll also test the air pressure of each tire.Harry
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I have gravel roads at the entrance to the barn. The weight of the bus will definitely leave a mark especially during rainy season.
Another effect is that the tag axle will scrape sideways as you turn. On asphalt you’ll see rubber marks, on gravel you might see a small trench.
You can raise the tag axle to reduce the scraping. I never do. It will put more weight on the drive axle, so it might sink in more if the ground is wet.
Gerald
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Don’t know harry but looks to me you have a tag air bag thats for some reason has more air than the other if it’s rolling and not sliding. Can’t tell. . If it was the drives would be 2 tires unless you have a low tire on duals. I didn’t stay at a Holiday Inn last night. Man I need to on my coach.
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As long as Jeff is going to look at this coach in a couple of days I would guess if there is in fact a problem it will be noted at that time.
To help with an understanding, unless someone messed with the suspension system or valving or the air bag sizes the amount of ground pressure on a tag axle tire is going to be the same as it was intended to be when the coach left the factory. The coach has 2 drive axle air bags and one tag axle air bag per side and they are joined together pneumatically at all times except then the tag axle is lifted.
On Harry’s coach my guess is the total tag axle weight is about 7,000 to 9,000 pounds depending on how the converter distributed the weight which will be slightly over half of the steer axle weight. That means if ruts were made in the ground, the ground was soft and the steer axle tires were what sank in, or the tag axle brake was locked and it was dragging. I’m not so sure of that although it cannot be ruled out.
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