The pump regulator is attached to each main pump. By changing cylinder block inclination angle the pump’s displacement is regulated. Adjustment of the pump’s displacement can be performed in two ways:• In accordance with the external pilot pressure from the pilot pressure source line.The pump’s displacement is determined in an inverse proportion ratio to the pilot pressure.• In accordance with the main hydraulic system pressure.When pressure increases, the regulator automatically decreases pump displacement, and vice versa.
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