Jie Cheng electric hammer drill no hammering force is how things, please the teacher
If the motor is switched on after starting, the hammerhead can not hear the compressed sound. It may be broken or eccentric. Such as after the turn on the motor, the hammer does not turn, there is no compression sound, there may be a wheel damage or rotor shaft broken. Another is that the umbrella tooth is bad and can not move at all.
No oil can cause shock or weakness. If the above situation is normal, there is no shock, then we must observe the large cylinder to see if there are cracks, cracks need to be replaced
The main reason is the impact of the rubber ring is a piston and hammer on aging, large cylinder vertical, down mouth, such as hammer to drop the apron is aging, aging aprons can hear the piston and the hammer against each other in the work of the voice, can find the piston and disassemble hammer face shiny, shock can be caused by short seed impact (which can be compared to the impact of new seeds)
