Hopkins 08526 Instructions from etrailer.com which say in part ...
"Install the level labeled "C" on either side of your RV or trailer for front-to-back leveling. And install the level labeled "3" on the front or rear of your RV or trailer for side-to-side leveling.
To determine the adjustments needed to level your RV or trailer:
Read both levels to get the numbers for each (where the bubble is positioned on the graduated scale).
Add the two numbers together.
Then make adjustments to your RV or trailer based on the following:
The total of the two numbers is the number of inches required to raise the lowest corner of your trailer.
The smaller of the two numbers is the number of inches required to raise the other corner on the low side.
When the bubble is centered between the markings on each level, your RV or trailer will be level."My old eyes find it MUCH easier to see this oversize Level Master mounted to my trailer's front wall. :B
