L3940DT-3 STEERING Parts group L3940DT-3 G10100 STEERING HANDLE G10300 TILT PEDAL G10501 UNIVERSAL JOINT G11000 STEERING CONTROLLER G11200 STEERING CONTROLLER [COMPONENT PARTS] G18001 TIE ROD/STEERING CYLINDER G18501 STEERING CYLINDER [COMPONENT PARTS] sale parts diagram catalog online construction equipment excavator tractor