A variable displacement pump is fitted with the illustrated device, the discharge flow rate will be reduced as described by which of the following statements? Illustration GS-0040

Correct Answer: Option B — Part "H" will move to block the replenishing pump oil flow across part "G" as flow across hydraulic motor decreases.

In variable displacement pumps, the replenishing pump maintains system pressure. When the hydraulic motor load decreases, the pressure differential changes, causing part H to shift. This movement restricts the replenishing flow, effectively reducing the pump's stroke and discharge flow to match the lower demand of the hydraulic motor.