Here are some hints that applies to all model railroading scales that use Kadee® Magne-Matic® Knuckle Couplers. Many problems with couplers can be avoided if enough time is spent making sure the couplers are at the proper height, securely mounted, and fine tuned where needed. “Close enough” is not a good practice if you want reliable coupler performance.
All of your couplers need to be mounted at the same height using a coupler height gauge and be as level as possible with no droop or slant. Even if the coupler pocket (draft gear box) is level, the coupler itself may not fit into the box properly and droop or at least have some vertical play. Check all of your couplers with one of our coupler height gauges for the particular scale you are working with. Our Coupler Height Gauges will help you with proper coupler heights, trip pin heights, and other helpful features that are built in to the Coupler Height Gauges depending on the style of height gauge you chose to use. Some model