Ligao JLM-S, Instruction Manual, Page: 36 / 44

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5.3 Check Valves Replacement
The check valve is a cartridge design and should be
replaced as a whole component.
Refer to the pump head section 7 in this manual.

Depressurize and disconnect the discharge line from
the pump head.

Place the bottom valve in water or other neutral
solution. Start the pump and rinse the check valves. When
the check valves are rinsed, remove the bottom valve from
the liquid and continue running the pump to allow the air to
enter until the discharge valve has no water or a neutral
solution.

Disassemble the discharge check valve, and place
each part in correct order.

Disconnect the suction tubing from the suction valve.

Disassemble the suction check valve, and place each
part in correct order.

Check the ball valve, seat, seal wear, if necessary, to
be replaced.