We took delivery last week of a new Jay Flight SLX 195RB Baja. Upon leaving the dealer I swung by the CAT scale to get an empty weight on the trailer before we start loading it up. I had previously weighed the TV with just myself and a full tank of fuel with the following results:
Steer Axle - 3440
Drive Axle - 2580
Total - 6020
Here are the weights with the TT attached but without WD engaged - includes battery and full 30lb propane tank (and unknown to me at the time a full fresh water tank
Steer Axle - 3320
Drive Axle - 3320
Total TV - 6640
Trailer Axle - 3020
GCW - 9660
I thought the TV numbers with the TT attached looked high and upon closer inspection of the TT I discovered the dealer sent me off with a completely full fresh water tank which sits all the way forward in the box. I have a Sherline Tongue scale so I used that to measure the tongue weight at the coupler with the trailer level. That came out to 420lbs. My hitch set-up is 60lbs.
So I'm trying to understand why the Total TV is ~160lbs more than what I would expect given the Sherline scaling the tongue at 420lbs. Also, a couple of weeks ago I hauled a bunch of scrap to the metal recycler. The scale there weighed my TV at 6000 on the way out which seems to agree with the first scaling of the empty TV at the CAT scale.
I've heard that the CAT scales are usually set for 20lb increments but sometimes are changed to use larger increments. It was a pretty busy day and I had to wait for a number of big rigs to roll through before I got my turn . Is it possible that a larger scale increment could cause the discrepancy? I don't see anything on the scale ticket that would indicate what increment it was calibrated for so I'm guessing one would need to ask the scale operator about that.
Given that the fresh water tank was full this scaling really isn't useful for me and I am planning to make another pass with the tank empty in order to get the proper baseline. But I do want to make sure I understand how to interpret the CAT scale values properly. At this point I think I am trusting the Sherline scale for an accurate tongue weight which is why I got it in the first place.
Appreciate any input or advice regarding this. Thanks!