| 摘要 |
A hydraulic control circuit for a dock leveler which includes a deck (D) pivotable between stored and raised positions and a lip (L) pivoted to the deck for movement between pendant and extended positions, the hydraulic control circuit, including a deck cylinder (10) couplable to the deck for controlling motion of the deck, a lip cylinder (20 ) couplable to the lip for controlling motion of the lip, a pump (P) for providing a source of pressurized fluid to the deck and lip cylinder s, and an operator-actuated switch (70) for selectively directing the pressurized hydraulic fluid to one of said deck cylinders and said lip cylinder.
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