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Old 06-15-2015, 04:49 PM   #1
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Berkshire 38A newbie question

We are on our first day of our first trip in our new 2015 Berkshire 38A. It feels as though there is a lot of front end vibration, as if the tires need balancing maybe. Also, it almost seems to have a bit of side to side floating feeling. Just wondering if this is normal. Any input is appreciated.
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Old 06-15-2015, 05:17 PM   #2
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Eustuss,
First, welcome to the FORUMS and congrats on your new Berkshire. Hope you have many fun, memorable, and trouble free trips with it!
Next, what brand tires are on your coach? I have Goodyear tires on my Berkshire and had the same issue with mine from the day I picked it up from the dealer. I was going to a campground about 10 miles away to spend the night to check everything out before returning home and noticed the vibration immediately. It turned out that the 2 front tires were out of round. It took me several trips to Freightliner and tire shops having the tires balanced before this was determined and the tires were replaced. I would call the Freightliner helpline and tell them of your issue so that it is on their records. Yours may just be a balancing issue but get it on record with Freightliner.
Good luck.
Tom
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Old 06-15-2015, 05:19 PM   #3
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Eustuss welcome.

First thing is "how much air is in the tires?
Have you checked them?
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Old 06-15-2015, 05:24 PM   #4
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Thanks for the response. Dan - tires are all at 120 psi cold.
Tom - sounds like we may be having the same problem you did. We will be sure to contact Freightliner. What did you end replacing the Goodyears with. We currently have Goodyear tires.
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Old 06-15-2015, 05:35 PM   #5
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120 is at the max which may make the coach ride rough and wander.
It is best to have it weighed and adjust the tire pressure based on the tire manufacturers inflation tables.

For example, after weighing, many of us ended up with about 100 front and 90 rear.

Weighing and adjusting pressure should be your first step before anything else.
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Old 06-15-2015, 05:37 PM   #6
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Thanks Dan. Sounds like we will start there. Where would we go about having that done?
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Old 06-15-2015, 05:40 PM   #7
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Many truck stops have scales that will give you front and rear weights.
I usually stop at a Loves truck stop near me.

When you get your numbers, post back and we will help with the tire pressure recommendations.

This link will help you find a Cat Scale near you.

CAT Scale Locator | CAT Scale

It should be loaded up as if travelling, full of fuel and passengers.
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Old 06-15-2015, 06:01 PM   #8
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As Dan said, try adjusting your tire pressure. I would bet that you can get away with 100 psi front and rear (unless you are severely overloaded) until you get it weighed. Freightliner authorized the tire replacement and would only replace them with new Goodyear tires because they won't mix brands of tires on the same rig.
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Old 06-15-2015, 08:51 PM   #9
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Are you running 255 or 275?
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Old 06-16-2015, 12:56 AM   #10
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We're running 255
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