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Old 05-14-2017, 07:03 PM   #1
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How close on axle weights?

I bought a 2017 F350 and this truck is taller than my 2012 so the front of my Rockwood 8289WS was raised up to get the rail clearance on the truck. I measured 8" higher in the front over the rear. So I was wondering what this did to my rear axle weight. I went to the scale last weekend and split the axles on the scale.
Front axle 2920
Rear axle 4240
That is a huge difference and the rear is 240# over the max weight of the 4000# axle. So after reading a few posts on here I decided to do the lift kit on the camper. I received the kit for the Dexter #10 axles Friday. Finished installing yesterday and went to reweigh.
Front axle 3210
Rear axle 3900
So now there is only 2" difference from front to rear and I am below axle weight by 100#. So after all this my question to people is how close are you on your axle weights if you have measured them separately. I was well below on my totals and would never have known there was a problem unless I weighed separate.
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Old 05-14-2017, 07:27 PM   #2
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Looks good now, was there any adjustment on the 5th wheel head itself?
How much clearance now between bed rail and camper?

The reason for the questions is that I am thinking of a new F350 myself

By the way, nice job!
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Old 05-14-2017, 07:31 PM   #3
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I bought and installed the same kit on my 8289WS. When I changed trucks to my Ram the RV was 5" high in the front. The lift brought it to within an inch or two and lowering the hitch in the bed to the bottom got it level. I have 6" bed rail clearance.

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Old 05-14-2017, 07:34 PM   #4
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Quote:
Originally Posted by brookstone345sa View Post
Looks good now, was there any adjustment on the 5th wheel head itself?
How much clearance now between bed rail and camper?

The reason for the questions is that I am thinking of a new F350 myself

By the way, nice job!

I dropped the pin box 2" to get me to 6" of rail clearance
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Old 05-16-2017, 11:58 AM   #5
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I've always wondered how much load people are putting on a back axle when a trailer is not level. Now I have an idea. Nice job actually taking it to the scale to find out.
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Old 05-16-2017, 12:03 PM   #6
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When i went from Ford to my Ram, i ended up lowering the truck and the hitch head to bring it back level.
I didnt want the trailer any higher.
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Old 05-16-2017, 03:13 PM   #7
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Interesting topic.. is there a huge risk to the axle if you're a little over? I had mine weighed last weekend on my bumper pull trailer and I was within 160 lbs of the max on my Escalade. I know when my teenager and wife gets in the truck I'll be much closer if not over.

Is it a huge deal if you exceed by 200lbs?
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Old 05-16-2017, 04:14 PM   #8
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Reading the interesting thread on weight distribution on your springs and axles if the RV is not level with truck. I have a 2013 Ford 350 towing a 2013 RST Crusader along Hwy I40 toward Las Vegas after hitting a pothole my spring bent on the left rear axle sliding it forward into the next tire causing a little burnt rubber,had to replace 3 tires because the rear axle alignment cause the other tire uneven wear. Found the Manufacture just places the minimum spring load for the Axle which can take more. Replaced all springs to Maximum Load for the Axle capabilities. It raised my RV almost level with the Truck, which before has a difference of 4 inches to being level. So reading your threads about even weight on all axles is what manufacture rate their springs. It appear it make a big difference in your axle if it is uneven.
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Old 05-16-2017, 04:29 PM   #9
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Never have underwood the Fiats and their redonculous heights. I see this 5er problem often.
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Old 05-17-2017, 02:57 AM   #10
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My suggestion is that canterburyshoe talk to an applications engineer at Dexter axle. These people are very knowlegeable and very helpful.

The rear axle loaded to 98% (3900#) 2% margin, is a failure waiting to happen.
Even if both axle were evenly loaded, they would be at 89% capacity (7110#) 11% margin.

I belive Dexter recommends a 20% margin on torsion axles to accomodate side to side loading differences and front to back axle loading differences.

It is quite possible that you could go to a 5200# 11 series axle changing from a 22.5 degree start angle to a 45 degree start angle, gaining 2 inches of height and reduce the axle loading to 68% of capacity.

For what it's worth,
John U
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