How to solve the mud pump can't discharge the flushing fluid?

When a horizontal directional drilling mud pump is unable to discharge the flushing fluid, it can indicate a problem in the system that needs to be addressed. Here are some steps to help troubleshoot and potentially solve the issue:

1. Inlet pipe is not in the water:

Solution: Put the suction strainer into the water with depth no less than 0.3~0.5m.

2. Inlet pipes blocked:

Solution: Disassemble the inlet pipes for cleaning.

3. Air leakage in suction line or fittings:

Solution: Check the inlet line's connection area and hoses, and eliminate any problems identified.

4. Suction and discharge valves blocked and do not work:

Solution: Replace the worn or failed valve parts, or clean the valves if blocked by muds and sands.

5. Plunger or piston and liner worn:

Solution: Fasten the nut or replace the parts with new ones.

6. Inlet pipes not full of water or occupied by air:

Solution: Fill the inlet pipes fully, remove the air completely.

7. Insufficient NPSHA:

Solution: Lower the suction height below 2.5 meters (for mud, then below 1m).

8. Inlet pipe too long or too small in diameter:

Solution: Decrease the suction pipe length to be no more than 5 meters, or increase the pipe diameter to proper size.

9. Hydraulic motor doesn’t work:

Solution: Check the oil system.

10. Discharge gate valves closed：

Solution: Open the gate valves.

The above methods are only for mud pump drilling of Elephant brand. Some models may be difference, please contact us for more details.