1. Check the oil tank filter every 3 ~ 4 months and replace it if necessary<br>2. Check the hydraulic oil for bubbles, sludge or aging<br>If this phenomenon occurs, clean or replace the oil<br>3. Check the oil pressure pipeline system for oil leakage<br>4. Check whether each sliding part is loose<br>5. Thoroughly attach the resin to the heating element of the sol cylinder or the telecommunication<br>eliminate<br>6. Check whether the external wiring is loose and repair it if found<br>
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