What happens when the speed of the excavator changes from slow to fast during the work? The following article mainly describes the fault analysis and maintenance of the speed of the Kobelco SK200-3 excavator from slow to sudden.
cause of issue:
1. Leakage inside and outside causes uneven speed and unstable work.
2.The oil temperature is too high without temperature compensation.
3. The stolen material is accumulated at the throttle, which reduces the flow cross section and causes the speed to slow down.
4. The check valve in the check valve is not tightly sealed.
5.The damping structure is blocked, the air is immersed in the system, and pressure fluctuations and jumps occur, making the speed unstable.
Kobelco SK200-3 excavator speed changed from slow to fast maintenance method:
1. Check the dimensional accuracy of the parts and the clearance to repair or replace damaged parts.
2. If it is a temperature compensation valve, there is no such failure, and the speed control valve without temperature compensation should reduce the oil temperature.
3.Strengthen the filtration and disassemble and clean the oil.
4. Train check valves.
5. Clean the parts with damping device, check whether the exhaust device works normally, and keep the oil clean.
Knowledge supplement:
What is the reason why the flow control handwheel of Kobelco SK200-3 excavator is not working? Analysis: The control valve core is blocked by stolen goods; the throttle valve core is under too much pressure; on the scale below the cut-off point, the inlet pressure is too high.
What is the cause of the failure of the pressure compensation device of Kobelco SK200-3 excavator? Analysis: The main valve is blocked by stolen goods; the spool or valve sleeve small hole is blocked by stolen goods; the pressure difference between the oil inlet and the oil outlet is too small.
