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Old 06-06-2013, 06:27 PM   #1
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Install reese dual cam today

So I put reese dual cam on trailer today. Front wheel height before trailer is 35 1/2" rear height 37" . After trailer on truck front is 35" and rear is 35 1/2" . Trailer is almost level by 1/2" higher in front I am on # 4 link in chain . Does this sound about right?
Truck is 2012 f150 crew cab, trailer is 2012 skyline dry weight 4205 max weight 6200 so I went with Reese 1200 dual cam. Have not had truck and trailer weighted , I know I need to though.
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Old 06-07-2013, 07:56 AM   #2
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Level across the board.

But remember that you're still looking at your TV and TT in an unloaded state. (No FW onboard, no passengers, no gear in TV or TT, etc.) As you start to add equipment and people into the equation, your ride height may need to adjust, but you've got the right idea.

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Old 06-07-2013, 10:08 AM   #3
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Quote:
Originally Posted by srg12 View Post
Does this sound about right?
Sounds like a good start.

But it's just a start. Next step is to load both tow vehicle (TV) and travel trailer (TT) with everything that will be in them when on the road to the campground. People, pets, tools, jacks, food, drinks, bed clothes and other linen, pots and pans, dishes, cultry, at least enough fresh water to flush the pottie when on the road, full propane tanks, 30-amp extension cord, water hose(s), wheel chocks, clothing, etc., etc. Then go to a truckstop that has a truck scale (or CAT scale), fill up with gas, and weigh the rig three times:

1] TV and TT with spring bars installed.
2] TV and TT without spring bars installed
3] TV with WD hitch head, but without the trailer

Compute hitch weight.
The weight on the front + rear TV axles with trailer but without the spring bars attached,
minus the weight on the front + rear TV axles without the trailer, but with the WD hitch head plugged into the receiver.

Compute gross trailer weight:
Trailer axle weight without spring bars
+ hitch weight

Compute hitch weight as a percentage of gross trailer weight.
Hitch weight divided by gross trailer weight.
Goal is 12% to 13%. More than 13% is okay if properly distributed and if your TV has payload capacity to handle the extra weight without being overloaded over the GVWR of the TV. 10% to 12% is acceptable but will more likely result in trailer sway under extreme conditions, even with a good sway control hitch. NEVER allow less than 10% under any conditions, and work hard to get it over 11%.

Compute percentage of hitch weight distributed off the rear axle of the TV when the spring bars are attached.
TV rear axle weight without spring bars minus TV rear axle weight with spring bars, divided by hitch weight.
Goal is 50% of hitch weight left on the rear axle (or distributed off the rear axle). Reasonable range is 40% to 60%.
You can adjust that percentage by loosening or tightening the spring bars. One chain length can make a big difference.

Compute percentage of hitch weight distributed to the trailer axles.
Trailer axle weight with spring bars
minus trailer axle weight without spring bars,
divided by hitch weight.
Goal is 25% (reasonable range about 20% to 30%).

Compute percentage of hitch weight distributed to front axle.
Weight on front axle with spring bars
minus weight on front axle without spring bars,
divided by hitch weight.
Goal is 25% (range 20% to 30%)

After you have the spring bars adjusted to distribute about 50% of hitch weight off the rear axle, if the weight distributed to the front and trailer axles is not reasonably close to 25% each, adjust the angle of the hitch ball to the coupler.

If you have to do much adjusting, then you need another set of scale weights to check your percentages again. (Yes, make friends with a CAT scale operator!)

Since you have all the numbers available, check for overloading.
Trailer axle weight should be less than the combined GAWR of the TT axles.
The weight on the 4 TV tires (GVW) with trailer tied on and spring bars installed should be less than the GVWR of the TV.
Gross weight of TV and TT should be less than GCWR of the TV.
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Old 06-08-2013, 12:21 AM   #4
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Thanks for the replies, looks like I still have a lot to learn, but it is worth it in the end
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Old 06-08-2013, 12:20 PM   #5
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Smokeywren, where does the 25/50/25% ideal weight distribution between axles come from? Is that from a hitch, TV or trailer manufacturer or what? I've seen that mentioned on another forum before too.

I've been having a bit of trouble setting up our Reese dual cam and after going to a scale learned that the actual tongue weight is quite a bit more than the bar rating (800 lbs). I ordered new 1200 lb bars and am going to go pick them up today and do another weigh-in at the scale.

I know from what I've found so far that measuring the before and after heights of the TV only puts you in the ballpark and only gives you part of the picture.
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Old 06-08-2013, 01:24 PM   #6
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Yes, with the trailer loaded, you will need to need to make you final adjustments to the Dual Cam. Just take your time and follow the instruction that came with the hitch.

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Old 06-08-2013, 03:08 PM   #7
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Smokeywren, where does the 25/50/25% ideal weight distribution between axles come from? Is that from a hitch, TV or trailer manufacturer or what?
My experience. When set up and adjusted per the manufacturer's instructions, that's about what I see. If I get the spring bars too tight, I won't have enough traction on the rear tires and those tires will spin out too easily. So that's an obvious symptom that the spring bars are too tight and I need to back off a link.

Here is a link to the install instructions for my Reese Strait-Line hitch with Dual-Cam sway control. These are probably the same as the instructions that came with your hitch:
Link: http://www.reeseprod.com/content/dow...ion/N66083.pdf

Quote:
I know from what I've found so far that measuring the before and after heights of the TV only puts you in the ballpark and only gives you part of the picture.
That, plus winding up with a level rig front to rear, plus having the trunion bars parallel with the ground and the tongue, and you should be close to 25/50/25 weight distribution.
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Old 06-08-2013, 07:28 PM   #8
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Our Reese instruction booklet did not come with the info. in that link. Not sure why. The info. on dimension "Y" info. is helpful.
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