A support system for an excavator is disclosed as it may include an extended center frame, a trench support, and/or a mat. The extended center frame may be bolted onto a standard excavator to widen the overall footprint of the machine and reduce ground pressure. The trench support relieves any remaining pressure toward the open trench. The extended center frame enables a larger excavator to straddle an open trench, while at the same time a smaller excavator can dig the shallower depths, thereby increasing efficiencies. By implementing the trench support and/or the mat, it might not be necessary to widen the tracks of the excavator as far, thus further reducing time-related costs. In addition, the trench support may also enhance safety of the trenching operations.

A straight traveling apparatus for a construction machine and a control method thereof are provided which can allow a curved travel when the working device is operated during the curved travel.

A system and method for compensating reduced track speed because of engine droop for a work machine is disclosed. The system may comprise a frame, an attachment coupled to the frame, a ground-engaging mechanism adapted to support the frame, an engine, a motor, a track speed sensor, an engine speed sensor, and a controller. The engine may drive the ground-engaging mechanism and attachment. The engine may be coupled through a variable speed transmission to the ground-engaging mechanism and the attachment. They variable speed transmission may include a hydrostatic circuit. The controller may be adapted to send an increased transmission command signal based on a drop in the engine speed signal when the work machine engages an increased load. The increased transmission command signal may increase a motor speed to cause an increase in track speed to compensate at least a portion of the reduced track speed from the engine speed droop.

A compact utility loader compact utility loader comprising a frame and a loader arm configured in a vertical-lift configuration. The compact utility loader additionally comprises a link pivotably secured to the loader arm and to the frame, and an actuator pivotably secured to the loader arm and to the frame. The compact utility loader further comprises a track assembly configured to maintain the loader arm in direct attachment to the frame.

A compact utility loader compact utility loader comprising a frame and a loader arm configured in a vertical-lift configuration. The compact utility loader additionally comprises a link pivotably secured to the loader arm and to the frame, and an actuator pivotably secured to the loader arm and to the frame. The compact utility loader further comprises a track assembly configured to maintain the loader arm in direct attachment to the frame.

A lift machine includes a base having a first end and a second end, a first assembly, and a second assembly. The first end has first and second pivot points defining a first lateral axis. The second end has third and fourth pivot points defining a second lateral axis. The first assembly is pivotably coupled to the first and second pivot points. The first assembly extends away from the base in a first direction such that first and second tractive elements are longitudinally offset from the first lateral axis and spaced from the first end of the base. The second assembly is pivotably coupled to the third and fourth pivot points. The second assembly extends away from the base in a second direction such that third and fourth tractive elements are longitudinally offset from the second lateral axis and spaced from the second end of the base.

A lift machine includes a base having a first end and a second end, a first assembly, and a second assembly. The first end has first and second pivot points defining a first lateral axis. The second end has third and fourth pivot points defining a second lateral axis. The first assembly is pivotably coupled to the first and second pivot points. The first assembly extends away from the base in a first direction such that first and second tractive elements are longitudinally offset from the first lateral axis and spaced from the first end of the base. The second assembly is pivotably coupled to the third and fourth pivot points. The second assembly extends away from the base in a second direction such that third and fourth tractive elements are longitudinally offset from the second lateral axis and spaced from the second end of the base.

A walking assembly for a machine includes a walking shoe and a driving assembly including a walking frame, a driving member, and a linkage member pivotally coupled to the driving member and the walking shoe. The walking assembly also includes a sliding assembly coupled to the walking shoe and the walking frame. The sliding assembly includes a support structure adapted to be received within the walking shoe and sliding assembly plate member mounted on the support structure. The sliding assembly further includes a pair of roller chains adapted to roll on a contact surface of the plate member. The sliding assembly includes a sliding shoe adapted to be coupled with the walking frame that is in rolling contact with the pair of roller chains. The sliding assembly also includes a guiding assembly to retain the sliding shoe in rolling contact with the pair of roller chains.

A propulsion control system includes a travel motor configured to be actuated to drive the track assembly in the forward and reverse travel directions; a propulsion control device actuated in first and second input directions; and a propulsion switching mechanism. In a first propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the forward travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the reverse travel direction. In a second propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the reverse travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the forward travel direction.

A propulsion control system includes a travel motor configured to be actuated to drive the track assembly in the forward and reverse travel directions; a propulsion control device actuated in first and second input directions; and a propulsion switching mechanism. In a first propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the forward travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the reverse travel direction. In a second propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the reverse travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the forward travel direction.