China Naming Network - Eight-character query< - Where is the changeover switch of the self-priming pump of Dongfeng Dorica sprinkler?

Where is the changeover switch of the self-priming pump of Dongfeng Dorica sprinkler?

Four-way valve, which pushes the valve to be vertical to the ground through the handle and opens the water inlet; Then go to the cab and put the gearbox into neutral, start the engine, loosen the clutch, and pull the power take-off switch back into gear. The self-priming pump started to work and began to absorb water.

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