| 摘要 |
An irrigation line move operates fully automatically for twenty-four hours and includes a prime mover carriage carrying a gasoline engine which drives a pipe of a wheel line through a hydraulic drive system, and the wheel pipe, through a first planetary transmission, drives a shaft paralleling the pipe. The shaft drives a slave carriage through a second planetary transmission. The engine is started under the control of a circuit having a stepping switch which sequentially shuts off water to the line, allows the line to drain, starts the engine to move the line, stops the engine, and turns on the water to the pipe. The above cycle is repeated after a given time of irrigation. The first planetary transmission includes a chain driving a plurality of planetary sprockets.
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