1. What are regular maintenance need to be done on tire changer in order to have a long service life?
Periodically drain the water in FRL, add oil in FRL so it can protect pneumatic components. Regularly tighten the bolts and screws on working table. Also check mechanical play or clearance on demounting head, hex bar... Check the belt tension.
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2. When working table doesn't turn, how to determine if the problem comes from gearbox, motor or switch?
Disconnect belt and see if the motor can run properly. If not, test the motor itself to see clockwise rotation and anti-clockwise rotation. If motor running properly then the problem is the switch.
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3. Why is filter-regulator (FRL) so important?
It dry the air so there is no moisture inside pneumatic components. It lubricates the rubber seals to extend its service life. In general FRL is important to maintain long service life of the machine.