OPERATING INSTRUCTION-6CONTENTSWarningThanks To The Buyer…About This Manual…1The product Structure....2Technical Parameter…3Technical Characteristic Description........3Preparation…5Putting Into Operation..........6Friction Clutch…7Mains Switch And Integral Over Current Protection7Gear Change…7Oil Bath Advantage…8Trouble Shooting…9Maintenance And Repair..........10Warranty…10Spare Parts List And Exploded drawing11Operation ManualWARNINGTo preventelectric shock or fire,please strictly abide by the proceduresin the operationmanual.The machine only forthe specialized persons,please do notlet other people operate.If any violation of the instructions operation and cause personal injury or machinedamage,our company disclaim all responsibility.The machine can only maintain by the people who has the certification.THANKS TO THE BUYERGreat thanks for buying the series of diamond drill ofPleasereadoperation manual and must pay attention to safety precaution.The rightoperation,will make you fully feel our products superior performance.Please putthis manual in a safe place forfuture reference.ABOUT THIS MANUALThe machine model of thedescription in this manual:1800(E)2050(E)2350(E)The following model options in oil.2550(E)2550C(E)2550B(E)）2550BC(E3050(E)3050C(E)3050B(E)3050BC(E3550(E)3550C(E)3550B(E)3550BC(E4050(E)4050C(E)4050B(E)4050BC(E4550(E)4550C(E)4550B(E)4550BC(E5050(E)5050C(E)5050B(E)5050BC(E3050/3C(E3550/3C(E)4050/3C(日4550/3c(E)5050/3C(日Confirm the machine model according to the nameplate.