This is a really useful Kadee coupler assembly fixture designed for HO scale #711 - 714 couplers (Part # 380 - 702). It's a great helper when assembling your Kadee #711, 712, 713 and #714 couplers. It clamps the coupler in the draft gear box, making it super easy to insert the centering spring and attach the lid.

Using this Kadee coupler assembly jig is quite simple. First, place the coupler in the draft gear box and use the jig to clamp it firmly. Then, you can easily insert the centering spring into the coupler. After that, attach the lid. When using, make sure the coupler is placed correctly in the jig to avoid any assembly issues. As for maintenance, keep it clean and dry. If it gets dirty, you can use a soft cloth to wipe it. Store it in a safe place when not in use to prevent damage.