1, rotor balancing school. 2, the amendment eccentric and static balance correction. DK40 main fan. 3, straightening or replacing. FBCD Bureau ventilating fan. 4, the fastening foot bolts. 1, choose a larger motor or reduce the load capacity. DK45 main fan. 2. Check the fuse, switch contacts, troubleshooting. Dalian fans. 3, removal of grease and dirt duct. 4, take measures to cool. 5, professional maintenance of the stator winding. 6, with a voltmeter, multimeter, check motor input source voltage. JK67 Board Ventilator | FBD Board Ventilator (certified) | Dalian fans by Zibo Blower Factory Co., Ltd. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) is a professional "fans, mine fan, mine fan, explosion-proof fan, heat fan, boiler fan" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "cloud laugh" brand has a good reputation. We adhere to the "service first, customer first" principle, so that the congregation Zibo Blower won the trust of customers in fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!