Abstract: A tree harvester head includes first and second saws, each of which comprises a cutting chain, and a lubrication system configured to lubricate the cutting chains of the first and second saws. The lubrication system comprises a source of pressurized lubricant and a diverter valve configured to divert flow of pressurized lubricant, from the source of pressurized lubricant, between the first and second saws for lubrication of the respective cutting chains.

Abstract: A timber-working head comprises a frame, first and second delimb arms pivotally coupled to the frame, a delimb cylinder, and delimb cylinder hosing. A torso of the frame comprises a box enclosure, and a hosing channel extending through a cavity of the box enclosure. The delimb cylinder is mounted to both the first delimb arm and the second delimb arm and operable to pivot the first and second delimb arms relative to the frame to open and close them. The delimb cylinder is oriented in its longitudinal dimension laterally relative to the torso, and is positioned in front of and floatable laterally relative to the torso. The delimb cylinder hosing is routed from the delimb cylinder through the hosing channel. The hosing channel expands laterally relative to the torso as the hosing channel extends along its length forwardly through the box enclosure.

Abstract: A timber-working head comprises a first motor, a second motor, a feed wheel, and an adaptor plate. The first motor comprises a first rotary output element. The second motor comprises a second rotary output element. The feed wheel is fixed to the first rotary output element for rotation therewith. The adaptor plate fixed to the second rotary output element for rotation therewith. The adaptor plate comprises radial projections arranged about the periphery of the adaptor plate and received respectively within corresponding axially recessed portions of the feed wheel so as to provide an operational interface between the adaptor plate and the feed wheel.

Abstract: A timber-working head comprises a frame, first and second delimb arms pivotally coupled to the frame, a delimb cylinder, and delimb cylinder hosing. A torso of the frame comprises a box enclosure, and a hosing channel extending through a cavity of the box enclosure. The delimb cylinder is mounted to both the first delimb arm and the second delimb arm and operable to pivot the first and second delimb arms relative to the frame to open and close them. The delimb cylinder is oriented in its longitudinal dimension laterally relative to the torso, and is positioned in front of and floatable laterally relative to the torso. The delimb cylinder hosing is routed from the delimb cylinder through the hosing channel. The hosing channel expands laterally relative to the torso as the hosing channel extends along its length forwardly through the box enclosure.

Abstract: A timber-working head comprises a first motor, a second motor, a feed wheel, and an adaptor plate. The first motor comprises a first rotary output element. The second motor comprises a second rotary output element. The feed wheel is fixed to the first rotary output element for rotation therewith. The adaptor plate fixed to the second rotary output element for rotation therewith. The adaptor plate comprises radial projections arranged about the periphery of the adaptor plate and received respectively within corresponding axially recessed portions of the feed wheel so as to provide an operational interface between the adaptor plate and the feed wheel.

Abstract: A tree harvester head (12) comprises first and second saws (32, 38), each of which comprises a cutting chain (42), and a lubrication system (44) configured to lubricate the cutting chains (42) of the first and second saws (32, 38). The lubrication system (44) comprises a source of pressurized lubricant (46) and a diverter valve (48) configured to divert flow of pressurized lubricant, from the source of pressurized lubricant (46), between the first and second saws (32, 38) for lubrication of the respective cutting chains (42).