5. Check whether one-way diaphragm is properly placed?
Illustration A is in gear, the one-way diaphragm is properly placed; But the Illustration B is
not in gear, need fix back appropriately, if the diaphragm is broken or change shape,
please find new spare parts inside spare parts kits as below to change it.
Disassemble the one-way valve as below to check whether the one-way diaphragm is
properly placed?
Please check the following photos,