Komatsu offers its factory-installed JRB hydraulic front coupler on the WB146-5, WB146PS-5, WB156-5 and WB 156PS-5 backhoe models. The coupler has a four-point pick-up for ease of coupling, even on uneven terrain. The hydraulic installation kit utilizes existing loader hydraulics. Top-mounted coupler contact points and lower coupler pins engagement are already visible by the operator. The lockable switch to open and close the coupler cylinder is located on the side dash. The load center of gravity is only 2 inches from the original pin-on attachment position for minimal reduction of lift capacity and breakout force.