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Introduction

1. Provide cooling oil to the system and reduce the temperature of the system.

2. Maintain the pressure of the main system circuit.

3. And provide control pressure to the control loop, the control pressure of the system is generally designed to be the same as the charge pressure.

4. Replenish the loss of internal fluid. In order to avoid damage to the transmission under any driving and braking conditions, the charge pressure must be set at the specified pressure.

5. The charge pump is generally a gear pump, or an external gear pump or a cycloid gear quantitative pump, installed on the main pump and driven by the main shaft of the main pump. The charge pump pressure is limited by the charge relief valve.

6. The standard charge pump is suitable for most pumps. If the displacement of the charge pump is insufficient, you need to increase the displacement of the charge pump or install a gear pump on the auxiliary spline of the main pump to provide the necessary Extra oil.

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