Abstract: A rotary mower is mounted onto a skid steer loader through a four bar linkage on each side of a mower housing. The linkage is arranged to pivot relative to a mounting bracket on the skid steer loader and relative to a mower housing, with differential lengths between upper and lower sets of links of the four bar linkage. The upper link on each side of the mower is slidably connected to the mower housing to permit the mower housing to pivot a limited amount about a traverse axis during normal operation. The links include stop members that engage when the mower is raised a selected amount to stop relative movement between the links and also to shut off power to the motor driving the mower. The forward end of the housing has depending chains mounted with a channel and providing a shield.

Abstract: A system for removably mounting a trenching attachment to hook and eye mounts on an end of a power unit. The trenching attachment includes a mounting frame having hook-engaging shafts and eye-engaging pins, a head drive assembly, a trenching boom assembly pivotally mounted to the head drive assembly, and a hydraulic boom cylinder for raising and lowering the boom assembly with respect to the mounting frame. With the boom assembly supported in a three-point stance adjacent the power unit, the cylinder is actuated in a first direction to rotate the mounting frame with respect to the boom assembly, and engage the shafts with the mounting frame hooks. Further actuation of the cylinder in the first direction rotates the mounting frames with respect to the boom assembly and power unit until the mounting frame pins are adjacent the mount eyes. A grease cylinder on the mounting frame is actuated to extend the pins and engage the mount eyes.

Abstract: A system for removably mounting a trenching attachment to hook and eye mounts on an end of a power unit. The trenching attachment includes a mounting frame having hook-engaging shafts and eye-engaging pins, a head drive assembly, a trenching boom assembly pivotally mounted to the head drive assembly, and a hydraulic boom cylinder for raising and lowering the boom assembly with respect to the mounting frame. With the boom assembly supported in a three-point stance adjacent the power unit, the cylinder is actuated in a first direction to rotate the mounting frame with respect to the boom assembly, and engage the shafts with the mounting frame hooks. Further actuation of the cylinder in the first direction rotates the mounting frame with respect to the boom assembly and power unit until the mounting frame pins are adjacent the mount eyes. A grease cylinder on the mounting frame is actuated to extend the pins and engage the mount eyes.