How Expert Mechanic Rebuilding Doosan DX140 Excavator Hydraulic Pump | How to Repair Hydraulic Pump

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Its mechanical action creates a vacuum at the pump inlet, subsequently allowing atmospheric pressure to force liquid from the reservoir and then pumping it through to the inlet line of the pump. Secondly, its mechanical action delivers this liquid to the pump outlet and forces it into the hydraulic system.
There are typically three types of hydraulic pump constructions found in mobile hydraulic applications. These include gear, piston, and vane; however, there are also clutch pumps, dump pumps, and pumps for refuse vehicles such as dry valve pumps and Muncie Power Products

How Expert Mechanic Rebuilding Doosan DX140 Excavator Hydraulic Pump | How to Repair Hydraulic Pump

Hydraulic pumps convert electrical energy into fluid pressure by using an electric motor to drive the pump. They are necessary for all hydraulic drives. The fluid pressure is then delivered by hydraulic fluid to cylinders and actuators and hydraulic motors at the required pressure level and volume.

There are four types of hydraulic pumps:
Gear pumps.
Piston pumps.
Rotary vane.
Screw pumps.

To select the right pump, follow the steps below: Select the cylinder trying not to exceed 80% of its nominal rating on both, load and stroke. Select the pump according to the oil volume and the number of cylinders in operation. NOTE: We must add 35 cm³ of oil per meter of hose we use.

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