Kobelco excavator common fault Q & A, this is really dry goods, there must be what you want.
Walking correlation
One problem
Question: Kobelco SK200-8 now 11290 hours, engaged in earthwork work, the recent walking difficulties, climbing a little slope can not move, the downhill is like a rabbit, the left walk faster than the right, has affected the normal work. What is the reason for it, please?
Answer: 1, digging machine deviation first check whether the crawler crawler belt tightness is consistent.
2, using the hydraulic pump to detect the pressure of the excavator walking pump in the normal range, if the pressure value exceeds the standard value, the leakage will occur inside the excavator, then there will be a part of the high pressure oil back to the oil pipe, which will result in the weakness of the single side walking of the excavator.
3. Change the rotary joint oil seal of the excavator to see if the deviation is changing. If there is no change, the rotary joint is normal.
4. Check whether the spool of the walking control valve of the excavator is blocked (if the gap between the spool and the valve hole is too large, it will cause the excavator to run away powerlessly on one side);
5. Check the pressure value of the safety valve of the excavator running control valve.
6. Check the pressure of the inlet of the walking motor (if the pressure is low, it will cause the excavator to walk unilaterally and run away).
Question two
Q: Kobelco SK200-8 is unable to walk and will stop the car.
Answer: 1, hydraulic pump and its control system malfunction, test P1, P2 pump pressure, normal value should be in 32-34M.
2, test pilot oil pressure, pressure is always around 3.0M.
3. Check whether the valve core and valve seat of the walking system control valve wear.
4, check the pressure of the walking motor.
Start up correlation
One problem
Q: my Kobelco SK75 excavator hot car didn't start well and worked for 5000 hours. It takes 1 to 2 seconds to start 5000 hours ago, and now it takes 5 seconds to start. What is the reason for asking?
Answer: first check whether the oil filter cartridge is iron filings. If not, check the rotary motor. It is necessary to test whether the pressure and flow settings of the excavator conform to the prescribed value.
Question two
Q: my Kobelco SK250-8 is not good to start, the hydraulic pump regulator plug is dropped, the car is a dozen, after sales said that the regulator starts with pressure, two belts, a large belt pressure, a small pressure, the pressure big regulator plug pulled out, the car is very good fire, after the car hit, plug plugs, normal work, normal pressure, normal pressure Can this regulator be repaired?
Answer: the regulator can be repaired, and the maintenance regulator needs professional service personnel to disassemble and check through the line. The plug of the hydraulic pump regulator belongs to the emergency mode. It is suggested that the P1 and P2 pump regulator be pulled through the regulator with the hand, to see if the plug is sent or not, and the service personnel should be repaired by the service. After the dismantling, the pump can be used to clean the pump proportional valve.
Question three
Q: my Kobelco SK350LC-8 is not good to start, when a fire from the screen, a pump two pump on a pump with 200-300 Jin of pressure has been jumping is not flammable, is there a pressure to hold the car hard to start! Where is the problem? There is no alarm on the display.
Answer: 1, the main valve core of multiplex valve is stuck to die;
2. The lag valve is stuck or abnormity.
3. The hydraulic pump adjuster is abnormal.
4. There may be abnormal low pressure signals.
It may be the above four aspects that lead to the suggestion.
