Features: 1. Connect one end of the water tube to the nozzle of the wet model trimmer and the other end to the tap, open the valve 2. Connect the waste-disposal tube to the unit 3. Connect the power cord, and switch on the power switch (O=off, l=on) 4. When braking, it is normal to hear clicking before the sand tablet stops. If the sand tablet makes unusually loud noises, remove it, and use the included hex-wrench to adjust the screw on the back cover (18) 5. To check if you need to replace the abrasive disk, rotate the disk by hand and estimate: if the platform jumps more than 2mm, change the disk. After replacing the disk, make sure to tighten the ring on the platform 8 (closest to the outside of the sand tablet) Attention: If there is some abnormal noise when working on Possible reason：① Axon is loosing ② Disc is not plain enough. How to solve it：①Dissemble the disc⒃ with spanner，make the snap Ring tightly；② change the disc. The machine does not work when power on. Possible reason：① fuse get burnt；② motor get burnt；③ switch get wrong. How to solve it：① change the fuse（22） which inside the socket；② change the motor ③ change the switch Specifications Voltage: 110V/60Hz Power: 500W Rotational Speed: 2800 rpm Dimensions: 44×35×35cm Weight of the dental trimmer: 20kg Content: 1x JT-19 Wet Model Trimmer Abrasive Disc Wheel Dental Lab Equipment