| 主权项 |
1. A tree harvester head, comprising:
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 comprising:
a source of pressurized lubricant; anda diverter valve that comprises an inlet port fluidly coupled to the source of pressurized lubricant, a first outlet port fluidly coupled to the first saw, and a second outlet port fluidly coupled to the second saw, the diverter valve configured to divert flow of pressurized lubricant, from the source of pressurized lubricant, between the first and second outlet ports and thus the first and second saws for lubrication of the respective cutting chains, the diverter valve configured to assume a first position for diverting flow of pressurized lubricant to the first saw in the absence of a control signal, and a second position for diverting flow of pressurized lubricant to the second saw in response to the control signal, wherein the tree harvester head is included in a forestry machine comprising a first input device operable to request activation of the first saw, a second input device operable to request activation of the second saw, and a control system that controls the diverter valve and is configured to output the control signal to the diverter valve in response to operation of the second input device but not in response to operation of the first input device. |
