Do you know how to use the tornado and maintain the tornado clean gun?

How to use the tornado and  maintain the tornado clean gun? 
Here is a case from a customer. 
The customer got the tornado and used for about 2 or 3 months,the bearing of the tornado stopped working.  
so, he gave us a feedback and showed us that  the tornado (tornado, clean gun) stopped working .  

1） How to Use Tornado? (tornado, clean gun) 

1） How to use the tornado(tornado, clean gun) ?
1.Pick up the tornado and check  if it's in good situation,such as connectors,adjusting knob,finger grip,brush and horn mouth and so on.
2. Check air compressor rate 6-8 kg/cm⊃2;(0.6-0.8 Bar.),no exceeding 10 kg/cm⊃2;（1.0 Bar).
3. Check if the cleaned object is capable of force 10 kg/cm⊃2;.
4. Keep tornado a distance 1-10 cm from the cleaned object.
5. Do not point to human body.
6. Keep out the touch of child.

2. How to maintain the  tornado clean gun? 
Turn the hole of bearing parts to meet the hole of body (housing）. 
please check the picture…