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Old 05-25-2014, 04:48 PM   #1
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Leveling Board Use ?

When using leveling boards/blocks is it necessary to place them under both wheels on the low side of the TT. or is one sufficient ?
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Old 05-25-2014, 04:55 PM   #2
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I have seen people doing it both ways but I always block under both wheels (when I had a 5th wheel and a TT) - I now have a MH and block under both wheels in the rear (dully)
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Old 05-25-2014, 05:11 PM   #3
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I saw a guy glue together about five 2 x 6s and cut them to form an inclined plane that rose 5+ inches. He would place them behind each wheel on the low side and back up until the RV was just beyond level. He then place the same configuration tightly in front of the tires and let the RV settle with the tires resting between the two inclined planes. (envision two right triangles with a circle resting on the hypotenuse of both triangles. If this method doesn't damage the wheels it was pretty ingenious.
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Old 05-25-2014, 05:18 PM   #4
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Seems to me if the trailer had been built to support the weight on one tire they would have only given it one axle. By not leveling on both wheels you could be putting too much weight on one tire. It's always recommended when using blocks under dual tires you should block under both tires, not just one. I'd think it'd be the same with the two tires on a side, even when they are on different axles.
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Old 05-25-2014, 07:43 PM   #5
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Good point BFlinn181 !!!
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Old 05-25-2014, 09:37 PM   #6
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I would say you need something under both wheels. If you lift one wheel a small amount the suspension will cause that whheel to be higher than the other. When you lift one wheel enough that the suspension will no longer absorb the difference you will then be as stated by other posts before me putting all the weight of that side of the trailer on one wheel.
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Old 05-25-2014, 10:45 PM   #7
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I always level one wheel first and if its not enough I place boards under the second one. If its not enough I double the boards on one and then both. Most often just one wheel lifted 1 1/2 in is enough.
Unless the trailer is equipped with IS suspension the equaliser will equal the load on both wheels.
Been doing it that way for 22 years.
Also the wife drives the truck while I handle the boards and in a few seconds the trailer gets perfectly leveled side to side.
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Old 05-26-2014, 09:51 PM   #8
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Typical trailer suspension utilizes an equalizer. As the word implies, it equalizes the load between both axles die to minor differences in elevation.
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Old 05-27-2014, 08:39 AM   #9
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If you put a 1 1/2" board under one wheel it will not lift your trailer 1 1/2 inches. The axles will float and are suppose to to absorb bumps. A some point you are right it will equalize the weight. The leaf will on the lifted axle will push on the center link pushing on the other leaf as well. With torsion axles this will not be the case.
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Old 05-27-2014, 12:24 PM   #10
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On a Dual Axel TT, one or both provided the suspension has the adjustment range

On a Dual Tire wheel (one wheel two tires) both.

And the planks should be AT LEAST as wide as the tread on the tire.


What I use (And this would work with a TT as well

I have some "Stair Steps" 2 by tread width planks

1 Foot
2 Feet long
3 feet long plank

You pull or back up as far as you need to make it level

With a dual axle TT you might go

2 Feet
Four feet long
and finally six feet long
But the idea is the same

It should not matter if the two axles are on different planks.
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Old 05-27-2014, 07:48 PM   #11
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Quote:
Originally Posted by CanadianCrew View Post
If you put a 1 1/2" board under one wheel it will not lift your trailer 1 1/2 inches. The axles will float and are suppose to to absorb bumps. A some point you are right it will equalize the weight. The leaf will on the lifted axle will push on the center link pushing on the other leaf as well. With torsion axles this will not be the case.
It gives 3/4" increments.
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Old 05-27-2014, 08:02 PM   #12
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Block both...
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Old 05-28-2014, 02:27 PM   #13
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Quote:
Originally Posted by wa8yxm View Post
On a Dual Axel TT, one or both provided the suspension has the adjustment range

On a Dual Tire wheel (one wheel two tires) both.

And the planks should be AT LEAST as wide as the tread on the tire.


What I use (And this would work with a TT as well

I have some "Stair Steps" 2 by tread width planks

1 Foot
2 Feet long
3 feet long plank

You pull or back up as far as you need to make it level

With a dual axle TT you might go

2 Feet
Four feet long
and finally six feet long
But the idea is the same

It should not matter if the two axles are on different planks.
I use the same method. I have 2-4'-2"x8", 2-3'-2"x8" and 2-1'-2"x8".
I can build a multiple step up to 6" if I need to (have never been over 4.5").

All are 45 degree cut on one end to provide a smooth back up on to them.

Usually the 4' with the 3' on top is the most I ever need. Occasionally the second 4' is placed back to back with a 1' board to make up a 5' on the bottom, then a 4' and a 3' if I need 4.5" of rise. If I need 6", the other 1' goes on top of the 3'er but again, never needed that.

Whatever I don't need to get side to side leveled gets stacked under the tongue jack foot before leveling front to back.
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Old 07-30-2014, 10:38 PM   #14
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Both.
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