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Open Roads Forum  >  Class A Motorhomes

 > Backing a DP up a steep slope.

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vacuumbed

Salt Lake City, Utah

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Posted: 01/24/12 12:41am Link  |  Print  |  Notify Moderator

Just wondering about your thoughts on this.

I'm considering buying a 1996 Monaco Executive 40' Cummins M11 with an Allison 4060.

Will it hurt the coach to back it up a 15% slope for about 200 feet?

squeakkos

parker az

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Posted: 01/24/12 02:11am Link  |  Print  |  Notify Moderator

no have done it many times. also you will love the m11 lots of power.

sch911

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Posted: 01/24/12 06:21am Link  |  Print  |  Notify Moderator

As long as you can clear the rear approach angle you should be fine. Those rear overhangs are sometimes long....


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Works2RV

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Posted: 01/24/12 06:55am Link  |  Print  |  Notify Moderator

Boy, this brought back some memories ----

First - to OP - as has been said, should not be a problem once you clear the transition.

Memory -- In the OLD days - used to have to back up hills that the forward gears just could not pull ( old trucks on the ranch ).


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2chiefsRus

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Posted: 01/24/12 06:48am Link  |  Print  |  Notify Moderator

sch911 wrote:

As long as you can clear the rear approach angle you should be fine. Those rear overhangs are sometimes long....


That's what I was thinking too.


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jetboater454

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Posted: 01/24/12 03:22am Link  |  Print  |  Notify Moderator

Worst problem will be at the dishes sliding to the front.


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Posted: 01/24/12 08:09am Link  |  Print  |  Notify Moderator

The Allison 4060 has a higher ration in reverse (4.8) than in first (3.5) so it will have more power backing up than going forward.


This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.

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vacuumbed

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Posted: 01/24/12 10:14am Link  |  Print  |  Notify Moderator

If it doesn't clear the approach would steel casters be the answer?

wny_pat

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Posted: 01/24/12 10:27am Link  |  Print  |  Notify Moderator

15 degrees??? That is pretty steep!! Are you sure? If the ground raises one foot in three feet of length then you are close. That is 66 feet higher that the road level by the time you get up there.


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CarlGeo

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Posted: 01/24/12 10:42am Link  |  Print  |  Notify Moderator

wny_pat wrote:

15 degrees??? That is pretty steep!! Are you sure? If the ground raises one foot in three feet of length then you are close. That is 66 feet higher that the road level by the time you get up there.

Grade at 15% will rise 15 ft in 100 ft horizontal. Your example is about 30% grade or double the OP's stated grade.
CarlGeo

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