HYDRAULIC COUPLER Go ahead and get dirty because the new AMI Wheel Loader Hydraulic Coupler is ready to work in any mess. Designed to perform in real conditions, the locking cylinder is fully enclosed. Dirt and debris cannot touch the cylinder, protecting and prolonging the life of the coupler. Available for all sizes of wheel loaders, compact loaders and loader backhoes, the AMI Hydraulic Coupler is ready to get to work no matter the conditions of your jobsite.