When the rake arm is in the vertical position, a signal
is sent to the hydraulic cylinder in the rake arm and the rake is pushed forward to mesh with the bar screen. Then the rake is pulled towards its top position and on its way it scrapes clean the bar screen.
When the rake is clear of the bar screen, the rake is automatically scraped clean by the scraper and soon after the hydraulic station stops. A cycle has been com- pleted, and after a preset period of time the next cycle begins.
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