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Old 06-27-2012, 08:19 PM   #1
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4 Corner Weigh

i finally got it done this past weekend. RV Safety did it after the Rally was over in Louisville. I am glad i did it. I was well within my limits, in fact the left to right variance on each axle was less than 200lbs difference. now i just have to move some items around in the bays. it also gave me the PSI i needed for the tires. i was actually running too high previously. it also let me know what my capability is if i wanted to add a motorcycle lift on the rear. (next item to buy) if you have not had one of these done i highly recommend it, well worth the money in addiiton to the safety factor. i was surprised lately how many RV dealers have not even heard of this method to weigh. most dealers told me just go get the total weight at the truck scale, so you do not exceed your max allowed.

bob
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Old 06-27-2012, 11:22 PM   #2
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I want to do that, I always try to keep putting thinks in balanced , not knowing if I am balanced. I had my tires air fill to max not knowing, would be nice to reduce that a little.
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Old 06-28-2012, 09:38 AM   #3
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i finally got it done this past weekend. RV Safety did it after the Rally was over in Louisville. I am glad i did it. I was well within my limits, in fact the left to right variance on each axle was less than 200lbs difference. now i just have to move some items around in the bays. it also gave me the PSI i needed for the tires. i was actually running too high previously. it also let me know what my capability is if i wanted to add a motorcycle lift on the rear. (next item to buy) if you have not had one of these done i highly recommend it, well worth the money in addiiton to the safety factor. i was surprised lately how many RV dealers have not even heard of this method to weigh. most dealers told me just go get the total weight at the truck scale, so you do not exceed your max allowed.

bob

I my opinion, and considering that Comfort, Longevity, Wear Patterns, and Safety being among the things that are taken into consideration when issuing a RECOMMENDED pressure at a given weight, your statement " it also gave me the PSI i needed for the tires" is suspect.

The variables just may (and they do for me) dictate a higher pressure is a wiser choice for a changing weight vehicle, not even delving into the slightly top heavy consideration!

The only static rule for me is to never go to a lower pressure than the recommended pressure just to satisfy the comfort variable.


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Old 06-28-2012, 02:41 PM   #4
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After doing my first 4 corner weigh, loaded for travel with gas and water full and black and gray tanks empty, I adjusted the tire pressure, 80 rear and 75 front according to the chart. I found the coach did not handle as well as it did when I picked it up, they had the tires set to 100. It felt mushey like the tires were underinflated. I gradualy increased the tire pressure until it handled good again. I settled on 90 all around. As others have said never go under the recommended pressure for your weights. But going a little over the tire chart pressures can improve handling, also never exceed the Max Cold pressure stamped on the tires . my $0.02.
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Old 06-28-2012, 03:30 PM   #5
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...I was surprised lately how many RV dealers have not even heard of this method to weigh. most dealers told me just go get the total weight at the truck scale, so you do not exceed your max allowed. bob
I'm on my forth RV since 'late 87 and for the most part all the dealers I've been to, whether it be for RVs or other vehicles really aren't interested in aftermarket ideas and fixes. I've only done the four corner once, but will eventually do it on the Vista. Two weeks ago I ask my dealer about the "cheap fix" on the F-53 suspension on my '11 Winnebago and was told by the service rep that in all the years he had been in RV repairs he had never heard of wandering and wallowing problems. Think he must of thought I had virgin ears and had never been lied to before. Started to tell him that I knew that I was born at night, but it wasn't last night except I've got to go back next week hopefully to finish up the second warrenty repair on the swivel seat behind the passenger seat.
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Old 06-28-2012, 03:39 PM   #6
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Great move on the four corner weight.

As pointed out. That gives you a great starting place and a figure to never go below, but you need to take other things into consideration too. I've come to add 5 psi above what the tables say to all of mine and I'm happy with the handling and the bit of a safety factor it provides for weight variations over time.

Just a comment about the PSI figure which is stamped on the sidewall. I believe it is actually a MINIMUM pressure required to handle the MAXIMUM weight it is rated for. Confused yet?

Isn't it interesting what comes out of the mouths of dealers?

Best of luck

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Old 06-28-2012, 03:54 PM   #7
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i like the little firmer handling, and did increase the PSI up 5 lbs above the chart.
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Old 06-28-2012, 09:56 PM   #8
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I like the idea of putting the pressure higher. On thinking about this it would seem safer to put in a safety margin in the weight. I have wondered how high the tire company's have made the tires to go without hurting them. Years ago I adjusted pressers to change wear.
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Old 06-28-2012, 10:16 PM   #9
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I like the idea of putting the pressure higher. On thinking about this it would seem safer to put in a safety margin in the weight. I have wondered how high the tire company's have made the tires to go without hurting them. Years ago I adjusted pressers to change wear.
Having a little PSI margin on the high side allows for the inevitable changes in weight that happen in a MH as frequently as trip to trip.

As for how much PSI a tire can take before being damaged... I don't think you'd be in danger of blowing up a MH tire in good condition by over inflating them with most filling methods. If they are inflated much higher than they need to be you might get a harsh ride, they may cause the rig to feel a little "squirmy" to handle, and over time you may see uneven tread wear but I don't think there's much "danger" in being on the high side within reason.

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