First of all, please check the electric wiring. If electric wiring has no problem, please check start switch(starting relay), commutator,motor brush or heat of pump. If there are problems to one of these, you should replace it with new one If you want more information and consultation, please contact us.

First, please check a flow meter. If oil is not enough, please add oil sufficiently. Second, you need to check coupling of motor. If coupling is broken or has problems, you should replace it with new one Third, please check pressure of relief valve. If relief valve is set at too low pressure, please set it at proper pressure level. Fourth, please check solenoid valve. If there are problems to solenoid valve, you should replace it with new one If you want more information and consultation, please contact us.

First, please check commutator and brush. If these parts have problems, you should replace these part with new ones or replace the motor with new one. Second, please check suction filter and remove dregs from filter. In some case. you had better replace the filter with new one. Third, please check pressure of relief valve. If relief valve is set at too low pressure, please set it at proper pressure level. Fourth, please check pump. If pump has problems, please replace it with new one. Finally, please check leakage of oil on the relief valve. If there is leakage with relief valve, please replace relief valve with new one. If you want more information and consultation, please contact us.

First, please check leakage of check valve. If check valve has a leakage, please replace it with new one. Second, please check a leakage of solenoid valve. If solenoid valve has a leakage, you should replace it with new one. If you want more information and consultation, please contact us.

First, please check whether solenoid valve wire is disconnected or fused. And check coil and cartridge of solenoid valve. If there are problems to one of these, please replace it with new one. If you want more information and consultation, please contact us.

First, please check filter of solenoid valve and abolish dreg and clean it or replace it with new one. Second, check flow control valve and if there are problems to it, please replace it with new one. If you want more information and consultation, please contact our overseas dept.

If power pack is used in the normal temperature, HL, HM or HV type and Viscosity Grade 22(VG22) is enough. If you want to use power pack under 0'c, VG15 is recommended. If you want more information and consultation, please contact our overseas dept.