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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: lvmci on October 19, 2019, 11:56:04 AM

Title: Axles just weighed
Post by: lvmci on October 19, 2019, 11:56:04 AM
Hi All, just had all wheels weighed individually,  turned out good, always wondered how I did on the build. The worst was a 500lb difference on the drives from side to side. Suggested much less air in all the tires for ride and full patch on the ground. I patted my self on the back and hurt my shoulder, lvmci...
Title: Re: Axles just weighed
Post by: windtrader on October 19, 2019, 02:26:23 PM
What sort of weigh facilities measure individual wheels? The typical scales at truck stops do not seem equipped to do this.
Title: Re: Axles just weighed
Post by: Gary Hatt - Publisher BCM on October 19, 2019, 06:00:46 PM
You can go to most scales and park your bus so only one tire at a time is on the scale.  They have several open scales in Oregon that they leave on 24/7 with no attendant there. I did this with my bus and adjusted the torsilastics at the scale based on the weight of each tire.
Title: Re: Axles just weighed
Post by: lvmci on October 19, 2019, 06:11:43 PM
I'm at a FMCA event, , mobile weigh station did it, lvmci...
Title: Re: Axles just weighed
Post by: bevans6 on October 20, 2019, 07:32:29 AM
The scales need to be leveled quite precisely, if you park with one wheel on tarmac and the other on the scale and there is an inch difference the weight will be a fair bit off.
Title: Re: Axles just weighed
Post by: luvrbus on October 20, 2019, 08:03:01 AM
I watched the new Foretravels being built a couple of weeks ago they had each wheel on scales all the wheels were in the 39 lb differential weight amazing,The 2 different sizes of tire was a ? for me 315/80/22.5 on 9 inch wheels on the front axle and 295/22.5 on 8-1/4 inch wheels on the rear and tag axle this was million and half dollar coach Prevost uses different size tires to
Title: Re: Axles just weighed
Post by: lvmci on October 20, 2019, 08:26:33 AM
He weighed each side at the same time both fronts, both drive axle sides, both tag sides, so they were on the same surface all the time, right in my RV spot. but he did raise the tag axles a bit on some 1 inch plywood while measuring drive wheels.
Title: Re: Axles just weighed
Post by: TomC on October 20, 2019, 08:49:22 AM
Sorry to counter think-but the ground level doesn't make any difference with an air ride bus. Once you drive onto the weighing platforms, the rear suspension will automatically adjust side to side. Then since the front suspension has typically only one leveling valve, the front suspension will quickly adjust to side to side and measure the same pressure on both front tires.

Now with steel spring suspension, this is totally different. One inch difference can make for different read out. This is why driving onto a perfectly level big plate scale is really the only accurate way of weighing.

With those weights, the tag axle isn't really needed. But I understand it makes for more stability and braking power. Good Luck, TomC
Title: Re: Axles just weighed
Post by: Dave5Cs on October 20, 2019, 04:02:26 PM
Don you can weigh at 49er truck stop on I-80. If not to busy which most of the time the scales are not. You can weigh each wheel and the whole bus plus each axle just takes some forward and backing up moving over driving.  :)