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Old 03-09-2013, 08:56 PM   #21
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I just went out and read the instructions that came with my Sherline, it specifically states to measure the weight with a level trailer. The most accurate measurement of tongue weight is achieved by measuring right where the hitch actually rests on the ball. An extension is provided that screws into the top of the cylinder so that you may support the trailer hitch in this manner. Always measure the hitch weight with the trailer level (trailer wheels blocked to prevent movement) and the hitch at the approximate height it will be when installed on the tow vehicle.
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Old 03-09-2013, 09:12 PM   #22
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and the hitch at the approximate height it will be when installed on the tow vehicle.
By that, I assume that they mean you're not towing with the trailer out of level.
Once I'm hooked up with the WDH in place, I am level. So, as long as the trailer is level when I use the scale, I should be getting the same reading.
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Old 03-09-2013, 09:25 PM   #23
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Yes, but you are measuring at the jack, not the hitch. Try at the hitch ball and compare #, you may have some variance.
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Old 03-09-2013, 09:30 PM   #24
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I am measuring where the hitch ball goes into the tongue. I place my hydraulic jack ( not the trailer jack ) on an old ammunition box and the Sherline on the jack. Then use the jack to lift the Sherline until I have a reading that doesn't increase.
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Old 03-09-2013, 09:38 PM   #25
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I'm sorry, when I read you place the scale on your jack, I assumed you were lowering the trailer jack tube down on the scale, some measure this short cut way but it is only 90% exact.
So you are raising the scale on your jack up to the coupler. Is it possible the jack may have some give? can you get a cinder block or something solid upon which to place the jack?
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Old 03-09-2013, 09:53 PM   #26
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The jack is on an ammo box of substantial construction. I don't have a problem to solve. I'm just describing how I weigh mine.
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Old 03-09-2013, 10:20 PM   #27
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As long as the ammo box does not collapse, it would work fine to support the scale.

And simple physics has it that with the single axle on a sloped spot, as long as the trailer is level, all weights are obviously acting in a vertical plane, and weighing the tongue in with the trailer level would give you an accurate reading. This would not work the same with dual axles, as it would transfer some weight from the front axle (if the tongue height was raised from hitch height), most of which would be on the rear axle, but some would be on the tongue as well. It would have just the opposite effect if the tongue was lower than the actually hitch height. Plus, action from the torsion axles would come into play a bit too.

The tongue height should be measured when hooked to the tow vehicle, and then weighed again with the tongue at the same height. This is especially true if you are not towing with the trailer fully level when hooked up. The difference would actually be fairly small, unless it is way out of level, but still be inaccurate to the actual loading on the tongue.
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Old 03-09-2013, 10:28 PM   #28
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Maybe you can run a seminar at the Escape Rally?
I will follow your suggestion when I'm ready to head out again and have the trailer loaded for a trip.
Toad does sit level when I pull it out to the street and hook up the WDH.

And, if there is another Sherline at the rally, I'd like to compare readings since I changed the gauge on mine.
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Old 03-09-2013, 11:09 PM   #29
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I would just like to weigh mine again. Something I have been very negligent about, and should remedy. I have always thought about getting a Sherline scale, just haven't yet.
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Old 03-09-2013, 11:14 PM   #30
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Quote:
Originally Posted by gbaglo View Post
I am measuring where the hitch ball goes into the tongue. I place my hydraulic jack ( not the trailer jack ) on an old ammunition box and the Sherline on the jack. Then use the jack to lift the Sherline until I have a reading that doesn't increase.
Glenn, that's commendable that you go to so much trouble to get your TW on an unlevel surface! Hopefully you will have some place level at a campground.
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