The excavator is slow and weak, and the oil temperature rises especially fast
Posted: Oct 24th, '24, 03:39
The excavator is slow and weak, and the oil temperature rises especially fast.
First of all, the actuator action is slow and weak, which can be analyzed as a result of low main pressure. There are several reasons for low stress:
1. Blockage of oil filter element causes poor oil absorption of hydraulic pump.
2, hydraulic pump internal components wear seriously caused internal leakage.
3, the system main relief valve pressure regulation is low or serious internal leakage.
4, the hydraulic oil has been seriously deteriorated.
Oil temperature rise especially fast troubleshooting:
1, we first hang up the main pressure gauge and pilot pressure gauge, start the engine, put down the safety lock, the measured pilot pressure is 0.8MP, lift the engine to the working speed control boom and bucket rod, and use the pressure gauge to measure the oil pressure: the pilot oil pressure is 1.8MPa, the system working pressure is 13MPa. This phenomenon may be caused by the simultaneous failure of the main relief valve and the pilot relief valve.
2, after adjusting the main relief valve and pilot relief valve, the pressure does not change, disassemble the relief valve and there is no wear and break the card, and eliminate the failure of the main relief valve and pilot relief valve.
3. Open the hydraulic oil tank and find that the hydraulic oil color is dark, and there are metal filings and powder mixed in it. Such an obvious anomaly basically determines that there is wear inside the hydraulic pump.
4, the hydraulic pump decomposition found that the pilot rotor pump wear serious, pump body contact surface has obvious strain phenomenon; The plunger, pump body and valve plate of the plunger pump have different degrees of wear, and the tile of the swash plate has also worn out the groove.
Because the internal parts of the hydraulic pump are too damaged, it is recommended that the customer replace the assembly. Replace the new hydraulic pump assembly and replace the new hydraulic oil and filter element.
5. In order to ensure the cleanliness of hydraulic oil, the hydraulic tubing, oil tank and control valve were cleaned at the same time. Then start the machine for operation test, the pilot pressure reached 3.5MP, the main pressure also reached 24.5MP, all parameters reached the normal state, the hydraulic oil temperature no longer rose sharply.
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First of all, the actuator action is slow and weak, which can be analyzed as a result of low main pressure. There are several reasons for low stress:
1. Blockage of oil filter element causes poor oil absorption of hydraulic pump.
2, hydraulic pump internal components wear seriously caused internal leakage.
3, the system main relief valve pressure regulation is low or serious internal leakage.
4, the hydraulic oil has been seriously deteriorated.
Oil temperature rise especially fast troubleshooting:
1, we first hang up the main pressure gauge and pilot pressure gauge, start the engine, put down the safety lock, the measured pilot pressure is 0.8MP, lift the engine to the working speed control boom and bucket rod, and use the pressure gauge to measure the oil pressure: the pilot oil pressure is 1.8MPa, the system working pressure is 13MPa. This phenomenon may be caused by the simultaneous failure of the main relief valve and the pilot relief valve.
2, after adjusting the main relief valve and pilot relief valve, the pressure does not change, disassemble the relief valve and there is no wear and break the card, and eliminate the failure of the main relief valve and pilot relief valve.
3. Open the hydraulic oil tank and find that the hydraulic oil color is dark, and there are metal filings and powder mixed in it. Such an obvious anomaly basically determines that there is wear inside the hydraulic pump.
4, the hydraulic pump decomposition found that the pilot rotor pump wear serious, pump body contact surface has obvious strain phenomenon; The plunger, pump body and valve plate of the plunger pump have different degrees of wear, and the tile of the swash plate has also worn out the groove.
Because the internal parts of the hydraulic pump are too damaged, it is recommended that the customer replace the assembly. Replace the new hydraulic pump assembly and replace the new hydraulic oil and filter element.
5. In order to ensure the cleanliness of hydraulic oil, the hydraulic tubing, oil tank and control valve were cleaned at the same time. Then start the machine for operation test, the pilot pressure reached 3.5MP, the main pressure also reached 24.5MP, all parameters reached the normal state, the hydraulic oil temperature no longer rose sharply.
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com