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Looking at a Jayco TT

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Old 05-25-2017, 12:51 AM
  #21  
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Originally Posted by Magnetic157
9% is really lite - you should try to aim closer to 10-13% tongue.

Here is a scaled down example of what a lite tongue can do:

Your tongue weight isn't right. Your calculating it with the WDH on. That transfers tongue weight to the trailer also. Therefore it has a bit more maybe even 150 or so. You actually might be fine on tongue weight.
Old 05-27-2017, 03:41 PM
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TV only
TV/TT w/wdh
TV/TT wo/wdh
From what I can tell my tongue wt is 780lbs. Looks like I need some more weight up front. So I how do i get more tongue wt and more wt on front of TV? I measured the height of the ball and the camper coupler height and the ball is aprrox 2 inches higher. According to curt mfg. Directions it says the ball should be 1-2 inches higher than the camper. Any suggestions? Is this camper too much for my truck?
Old 05-27-2017, 08:47 PM
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Originally Posted by MadFX4
TV only
F= 3320
R= 2900
GVW =6220

TV/TT w/wdh
F = 3100
R = 3860
GVW = 6960
T = 6700

TV/TT wo/wdh
F = 2980
R = 4020
GVW = 7,000
T = 6640

From what I can tell my tongue wt is 780lbs.
 
Right. GVW wo/wdh 7000 minus GVW TV 6220 = 780 tongue weight (assuming the truck and trailer were loaded with the same weight for both those scale tickets.)


Trailer axle weight 6640 + 780 = 7420 GTW = ~10.5% TW
F = 3100 - 2980 =120# distributed to front axle
R = 3860 - 4020 = 160# remaining on rear axle
T = 6700 - 6640 = 60# distributed to trailer axles
 
Oops! Something's not right. Apparently the rig was not loaded with the identical weight when you weighed it with and without the spring bars tight. 120+160+60 = only 340 pounds TW. What happened to the other 440 pounds of TW? Does anyone see anything wrong with my logic?
 
Looks like I need some more weight up front. So I how do i get more tongue wt ...
For more TW, move weight in the trailer from behind the axles to in front of the axles.
 
...and more wt on front of TV?
 
Tighten the spring bars. But be sure to leave at least 50% of gross tongue weight on the rear axle.


Is this camper too much for my truck?

No. Assuming your scale tickets are accurate, then you're right at the max of payload capacity, but not overloaded. However, if your aluminum F-150 has rear GAWR of 3,850, then you're barely overloaded over the rear GAWR.
 
But an accurate analysis of your weights cannot be done until we can acccount for all the tongue weight (TW). TW distributed to the front and trailer axles, plus TW remaining on the rear axle should = total TW.

Last edited by smokeywren; 05-27-2017 at 08:53 PM.
Old 05-27-2017, 11:47 PM
  #24  
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Originally Posted by MadFX4
TV only
TV/TT w/wdh
TV/TT wo/wdh
From what I can tell my tongue wt is 780lbs. Looks like I need some more weight up front. So I how do i get more tongue wt and more wt on front of TV? I measured the height of the ball and the camper coupler height and the ball is aprrox 2 inches higher. According to curt mfg. Directions it says the ball should be 1-2 inches higher than the camper. Any suggestions? Is this camper too much for my truck?
You didn't state what any of your axle GAWR limits are or what your GVWR is or what your GCWR is or what your payload is, so we can't evaluate any of that. It's on a sticker on your driver door. What does show up is that your WDH only returned 35% of the weight that was lifted from the steer axle and it is still 220 lbs. lighter than without the trailer attached. You need to adjust your WDH to return more weight to the steer axle. I have mine adjusted to return 72% of the weight removed so it is only 100 lbs. lighter. Your tongue weight is 10.5% of the trailer weight.

Tongue wt. = (2980 + 4020) - 6220 = 780
Trailer wt. = 13660 - (3320 + 2900) = 7440
780/7440 = 10.5%

The trailer lifted 340 lbs. from the steer axle. 3320-2980=340
Engaging the WDH only returned 120 lbs to the steer axle. 3100-2980 = 120
120/340 = 35%
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Last edited by atwowheelguy; 05-28-2017 at 01:36 AM.
Old 05-28-2017, 10:51 AM
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TV GVWR= 7000
Payload=1709
TV Axle limits= front 3450, rear 3800
I couldn't find TvGCWR.
I see that iam over a little on the rear axle. I will have to adjust that.
Old 05-28-2017, 03:27 PM
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Originally Posted by MadFX4
I couldn't find TvGCWR.
Look in your Owner's Guide. Mine for my 2012 F-150 is in the trailer towing sub-section of the tires, wheels, and loading section on page 267.

It's in a table that requires you to know cab, engine, drivetrain (4x2 or 4x4), wheelbase, towing package, and axle ratio. For example, my SuperCrew 4x2 with 3.5L EcoBoost engine, 157" wheelbase (6.5' bed), and 3.15 axle ratio, without either max tow or heavy duty payload pkg (HDPP), has GCWR of 14,000 pounds.

My tow rating is 8,400 pounds, only when my wet and loaded TV weighs (14,000 minus 8,400 =) 5,600 pounds. But my wet and loaded TV weighs a lot more than 5,600, so my real-world tow rating is therefore a lot less than 8,400, In fact, I'm slightly overloaded over the payload capacity of my TV with my TT that weighs less than 5,000 pounds. YMMV.
Old 05-29-2017, 11:13 AM
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Originally Posted by MadFX4
TV GVWR= 7000
Payload=1709
TV Axle limits= front 3450, rear 3800
I couldn't find TvGCWR.
I see that iam over a little on the rear axle. I will have to adjust that.
You can find the GCWR in the towing guides for several years here: http://www.fleet.ford.com/towing-guides/

2015 towing guide is here: http://www.fleet.ford.com/resources/...Tgde_May19.pdf

The current 28BHBE lists the trailer GVWR as 9250 lb. with a dry hitch weight of 625 lbs. I have assumed that it has two 4400 lb. axles.

These numbers indicate that your truck weighed 7000 - 1709 = 5291 lbs. off the assembly line. On the scales without the trailer it weighed 6220, indicating 929 lbs. of passengers and cargo without the trailer attached. Any cargo that could be moved to the trailer would help your overloading situation. Also as mentioned before, the WDH needs adjustment to transfer some more weight from the drive axle to the steer axle and to the trailer axles.

Also you did not indicate your hitch receiver weight rating. A sticker is on the receiver under the back of the truck.

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Last edited by atwowheelguy; 05-29-2017 at 01:34 PM.
Old 05-29-2017, 05:05 PM
  #28  
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Can't believe how many purchased the Jayco Jay Flight 28BHBE. I'm guessing like us, we found the dry weights to be give a good start.
28BHBE:
Unloaded Vehicle Weight (lbs) View Definition 6510
Dry Hitch Weight (lbs) View Definition 685

A good portion lower than the model you are looking at, but may not be floorplan of choice.

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Old 05-29-2017, 05:44 PM
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My GCWR is 16,100.
Old 05-30-2017, 12:03 AM
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Originally Posted by MadFX4
My GCWR is 16,100.
Did you ever check the hitch receiver weight limit? It's on a sticker on the bottom of the receiver.

Check back in here when you get some cargo transferred from the truck to the camper and get the WDH adjusted to transfer some more weight to the steer axle and get to the scales again.
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