Be sure there are no sharp or rough edges that may damage the lock. If there are, don't grind or file them. Since these locks are of the outdoor variety, they are exposed to water and dirt, the two most damaging things to any lock. If left exposed to the elements without proper care, your locks won't last long. The little pins inside, and the springs, will be subject to corrosion.
Oil attracts dirt.
You may put a piece of tape over the keyway to prevent dirt and water from getting in. That's a very good way to prevent exposure to dirt and water. All I'm saying is, if you keep your locks clean and lubricated, they'll provide many years of service. The one thing I've not yet mentioned is those wood blocks. If you have a selection, as I do, you'll be able to level your RV at home, in storage, at campgrounds, or on the side of Mt. Everest, for that matter.