New Andersen WD hitch

renojack wrote:
The non WD weights were: Front 3200 Rear 4720 Trailer Axles 7000

The WD attached weights with 7 threads showing were: Front 3280 Rear 4680 Triler Axle 7000

The Suburban alone was 6980 and the trailer alone was 7980.

The wheel wells were just a little shorter in the rear than the front (less than an inch from unloaded.

Can I deduce that the tongue weght is 980 lbs and is the 80 extra lbs in front when hitched too much? Any adjustment needed? Any comments welcomed . I don't know where to attach the scale error of 40 lbs or is it significant?

Did you measure the front axle load separately for "Suburban alone"?. That's an important value. The main purpose of a WDH is to restore all or most of the load which was removed from the front axle.

The numbers provide two estimates of tongue weight -- (3200+4720)-6980 = 940# and 7980-7000 = 980#.

The numbers provide three estimates of GCW -- 3200+4720+7000 = 14920, 3280+4680+7000 = 14960, and 6980+7980 = 14960.

The difference of 40# in the first GCW easily could be resolved by changing the numbers to 3240+4740+6980 = 14960. That "adjustment" would give internally consistent values which would indicate that when WD was applied: 40# was added to the front axle, 60# was removed from the rear axle, and 20# was added to the trailer axles. This 2:3:1 relationship is consistent with how a WDH works.

However, as Bryan pointed out, the numbers indicate almost no load was being transferred. The indicated load transfer to the trailer axles was 20# versus approximately 200# transfer to the trailer which would result from proper WDH adjustment.

The indicated 40 or 80# added to the front axle is not nearly enough. With a tongue weight of nearly 1000#, when the WDH is properly adjusted, it will add back 400-500# to the front axle. And we need to know the unhitched front axle load in order to know how much load should be added back.

Ron