Lifting tires off ground when storing for extended period? - Page 3 - Fiberglass RV


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Old 02-11-2017, 05:23 PM   #29
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Opinions are varied. Older bias ply tires could develop a flat spot, but a radial tire won't, especially if the pressure is kept up. I have never blocked up a trailer with radial tires while stored over the winter, and have never had any detrimental effects from it.

I know hordes of people with travel trailers that park them over winter, and know of no one who blocks their trailers up.

But, there is no harm in blocking up a trailer either.

The temporary trailer I bought last year had 21 year old Goodyear radials. It was parked and used like a cabin, and never had the weight taken off the tires. There were vinyl tire covers on the wheels, which were in pretty rough shape. When I pulled it out of where it was parked, I had a good look at the tires as my wife pulled slowly ahead, looking for flat spots, bulges or anything not right. Everything looked great. I then towed it just over an hour straight to the tire shop, where they double checked the date stamp, as they could not believe how old they were, as they looked to be in great condition.
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Old 02-11-2017, 05:51 PM   #30
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I admit to being ANAL . I actually read and follow the instructions that are in my trailer's owner's manual along with the instructions given to me during my trailer's orientation session.
I have a process for getting my trailer ready for its' long winter storage which works for and is satisfactory to me.
Since I am the one that does the work , I feel no compunction to furnish an explanation.
As always , others are free to do what they see fit or proper

** NO I do not lift my trailer by placing a jack under the axle "
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Old 02-11-2017, 10:39 PM   #31
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Quote:
Originally Posted by Jon in AZ View Post
Steve said, "The trailer is supported with wooden blocks positioned under the frame on both sides of the axle" (emphasis added).

Emily responded, citing Steve's post, "Ours is stored exactly the same way."

I think we're on the same page. Lift and support on the frame, not the axle tube.
Thanks, Jon Yep. Lifted on the FRAME, on either side of the axle!
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Old 02-12-2017, 09:34 AM   #32
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I wrap our trailer in a Calmark cover, store it under our 21' (9' high) carport, and remove the wheels and tires after our last fall trip until spring pops and we get ready to go.

Frank
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Old 02-12-2017, 10:38 AM   #33
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I don't really care what y'all do. Your effort and decision doesn't affect me or my trailer. Put all the effort you want into how you treat your trailer, or none. Because it really doesn't matter... to me. I think it's important everyone remember this and there are no right or wrong answers. Isn't choice grand!
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Old 02-12-2017, 06:29 PM   #34
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Originally Posted by steve dunham View Post
Thanks Jim for the information . I was using a rule of thumb formula I got from an engineer buddy which did not have temperature compensation built into the formula.
I am using synthetic grease so I'll need to get the friction coefficient from the manufacturer
Does orientation of the axle relative to magnetic north and south have any affect ? My trailer is parked with the tongue pointing to "True North"

**My Mom was right , I should have finished engineering school **
Except, Steve, you must compensate for Coriolis force/effect. Because you are at about 44 degrees N , you should rotate the trailer precisely 44 degrees counterclockwise (0r anti clockwise as the Brits say). Your pants also unzip easier by the same maneuver but let's not go into that.
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Old 02-12-2017, 06:32 PM   #35
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Originally Posted by Donna D. View Post
I don't really care what y'all do. Your effort and decision doesn't affect me or my trailer. Put all the effort you want into how you treat your trailer, or none. Because it really doesn't matter... to me. I think it's important everyone remember this and there are no right or wrong answers. Isn't choice grand!
But Donna, remember the "Butterfly effect". We need to know what you do and when you do it to your trailer so we can make minute adjustments to our trailers to keep the planet in balance.
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Old 02-12-2017, 09:07 PM   #36
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Except, Steve, you must compensate for Coriolis force/effect. Because you are at about 44 degrees N , you should rotate the trailer precisely 44 degrees counterclockwise (0r anti clockwise as the Brits say). Your pants also unzip easier by the same maneuver but let's not go into that.
This is a common misconception since you must take into account the orientation of the bearing races and not the axle.You need to rotate the trailer 90 degrees to align the centerline of the axle and not the trailer.
The tarus effect of the races concentric with the axle take precedence in this case and the axle itself must be aligned with magnetic North.
In this case the magnetic lines of force are being cut by the rolling bearing units and induce a counter emf coupled with the field of the axle resulting in the Helmholtz reaction along the E field and not the H field as assumed if the axle is even slightly out of alignment.
This, of course, will indicate that the force in the plane of rotation is coupled with the induced field of the lubricant caused by mixing of the grease especially evident if the bearings are over greased specially with non synthetic lubricants below 20*C.
to simplify the problem the base effect is to stir the bovine excrement to the point where it will not stick adequately unless spread thickly.
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Old 02-12-2017, 09:17 PM   #37
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Originally Posted by redbarron55 View Post
This is a common misconception since you must take into account the orientation of the bearing races and not the axle.You need to rotate the trailer 90 degrees to align the centerline of the axle and not the trailer.
The tarus effect of the races concentric with the axle take precedence in this case and the axle itself must be aligned with magnetic North.
In this case the magnetic lines of force are being cut by the rolling bearing units and induce a counter emf coupled with the field of the axle resulting in the Helmholtz reaction along the E field and not the H field as assumed if the axle is even slightly out of alignment.
This, of course, will indicate that the force in the plane of rotation is coupled with the induced field of the lubricant caused by mixing of the grease especially evident if the bearings are over greased specially with non synthetic lubricants below 20*C.
to simplify the problem the base effect is to stir the bovine excrement to the point where it will not stick adequately unless spread thickly.
THAT SONG FINALLY MAKES SENSE!!
" The wheels on the bus go round and round...."

Thank you oh thank you
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Old 02-12-2017, 09:54 PM   #38
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Originally Posted by redbarron55 View Post
This is a common misconception since you must take into account the orientation of the bearing races and not the axle.You need to rotate the trailer 90 degrees to align the centerline of the axle and not the trailer.
The tarus effect of the races concentric with the axle take precedence in this case and the axle itself must be aligned with magnetic North.
In this case the magnetic lines of force are being cut by the rolling bearing units and induce a counter emf coupled with the field of the axle resulting in the Helmholtz reaction along the E field and not the H field as assumed if the axle is even slightly out of alignment.
This, of course, will indicate that the force in the plane of rotation is coupled with the induced field of the lubricant caused by mixing of the grease especially evident if the bearings are over greased specially with non synthetic lubricants below 20*C.
to simplify the problem the base effect is to stir the bovine excrement to the point where it will not stick adequately unless spread thickly.
Electric motor bearings encounter the same problem when controlled by a VFD and the motor is run at higher frequencies.
The use of conductive purple grease help stop the bearings from electrical pitting and arcing .
There is also a problem when driving East to West on ungrounded asphalt highways at a speed approaching resonant frequency with steel belted radial tires .The tires cut the North / South lines of magnetic flux and they generate an EMF ( CEMF if going West to East ) which also damages the bearings and axle spindles.
Many modern tires have Kevlar belts which allows a tire to rotate in all direction with no ill affect
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Old 02-13-2017, 12:45 PM   #39
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In the motors with VFDs we now install insulated rear bearings and often grounding brushes for the shafts.
No, really.
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Old 02-13-2017, 01:35 PM   #40
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I have never understood why you guys worry about pitting in bearing races.
Golf balls work so much better with dimples...
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Old 02-13-2017, 01:38 PM   #41
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Originally Posted by redbarron55 View Post
In the motors with VFDs we now install insulated rear bearings and often grounding brushes for the shafts.
No, really.
Thanks for the update , I retired from the trade and have not kept up with all the changes . One more thing to add to my memory.
I am glad you caught my mistake.
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