| 摘要 |
<p>A guide bar (28) for a saw chain mounted to the boom (22) of a tree harvester includes, oil holes (58,60) to receive oil for channeling oil to the edge grooves (44) wherein the saw chain is entrained, and also a pattern of inter-connecting oil channels in the bar (28) for channeling oil to various positions on the bar edge, including the bar edges adjacent each oil hole and at the bar nose. C-shaped valves (70,72) in the oil holes (58,60) are manually adjusted to control the flow of oil to the various positions. <IMAGE></p> |
