Make a soapy water solution and spray it over the connections in which the hoses connect on the control device and floatation tanks. When bubbles seem, it signifies an air leak. You can also spray the entire spot of every tank to look for punctures and destruction.  Schindler 9500 inclined https://lift-engineer92726.liberty-blog.com/27910360/new-step-by-step-map-for-inspections-under-loler