Precautions to Read Before Using Hydraulic Submersible Slurry Pump

1. Working Principle of Hydraulic Slurry Pump

   • The pump is driven by high-pressure hydraulic oil, which powers the hydraulic motor. The motor generates centrifugal force via the rotation of the impeller and volute to suction media.

   • The hydraulic oil input serves as the power source.

   • Note: The pump’s flow rate and head are directly proportional to the provided hydraulic pressure and oil volume.

2. Hydraulic Circuit Connection

   • Connect the excavator hammer head circuit correctly as marked: High-pressure line (inlet) and low-pressure line (return). Ensure lines are not reversed.

   • The pump’s rotation direction is counterclockwise when viewed from the inlet end. The mixer head rotates to scoop sediment.

3. Overflow Line Requirements

   • A dedicated overflow line must be installed to directly return oil to the tank.

   • Prohibited: Leaving it unconnected, connecting it to the return line, or blocking it.

4. Initial Operation and Air Venting

   • Initial use may cause irregular operation or jitter due to air trapped in the hydraulic motor or lines. Perform air venting:

   Method 1:

   • Submerge the pump entirely in water (at least 10 cm above the volute) to cool the mechanical seal.

   • Run the pump and mixer head at minimum throttle for 10–20 minutes. If issues persist, pause for 20–30 minutes and repeat.

   • Repeat venting if air remains after subsequent use.

   Method 2 (Experienced Operator Tip):

   • Connect all lines but leave the return line disconnected (attach a bucket).

   • Open the excavator’s hydraulic valve and loosen the pump’s vent bolt.

   • Let residual pressure from the hydraulic pump slowly fill the motor and lines with oil (20–30 minutes).

   • Once oil flows steadily from the return line, reconnect it.

5. Operational Guidelines

   • After normal operation, gradually increase the throttle to working conditions. Avoid over-throttling or exceeding pressure limits to extend equipment life.

   • Tighten all bolts after 1–2 days of operation and check periodically for looseness.

   • Never use the pump as a pivot for excavator movement or operations.

   • Always start and stop the pump in clean water.

   • Ensure clean oil ports during equipment relocation.

Warnings:

• Follow hydraulic oil specifications and maintenance schedules strictly.

• Failure to vent air or improper installation may cause severe damage.