Abstract
The operating system of loader working device is composed of the boom and bucket. It is operated mainly through multi-way valve axis manipulation, this kind of way is force-large, labor-intensive, but is low efficient. So it is necessary to optimize the oil source valve. Using the hydraulic pilot to control loader multi-way valve to optimize in the loader is safe, comfortable, furnished spirit and can achieve variable speed. Working hydraulic system uses a small flow pilot circuit control. The main oil is controlled by high pressure and large flow, and then the operating force of the working device is reduced greatly.
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