What is the reason for the slow motion of the excavator? What should the driver do when the excavator moves slowly? Today's article will tell you about the fault analysis and maintenance of Caterpillar excavator, model Caterpillar 345d.
Details: Caterpillar 345d excavator has been excavating in mountainous areas. It has not been overhauled before and has been regularly maintained In recent days, when the excavator was started up and operated the joystick, the whole vehicle moved very slowly, both cold and hot The excavator has been used for more than 5800 hours.
analysis:
Cause analysis of slow motion of Caterpillar 345d excavator:
1. The internal leakage of excavator hydraulic pump causes the decrease of pump oil supply Generally, if the service time exceeds 5000 hours, the volumetric efficiency of the pump will decrease, which may cause the reduction of oil supply
2. Excessive fluid flow resistance in the pump suction pipe The oil suction pipe is too long, the oil suction pipe turns too much, and the turning angle of the oil suction pipe is too small
Caterpillar 345d excavator moves slowly, and the pump oil supply is insufficient. On site maintenance:
Test the machine on site to confirm the fault phenomenon Check whether the suction pipe of the excavator pump is blocked or whether the suction pipe is smooth
Clean the Caterpillar excavator filter and ensure that the oil is free of pollution Check whether the oil used by the excavator meets the standard requirements
Select the oil with proper viscosity Finally, start the excavator operating lever to check whether there is high temperature after the excavator moves slowly? Generally, the best oil temperature is 50-80 ℃. If it exceeds 80 ℃, the pump leakage may increase due to high temperature, and the oil discharge may be insufficient, resulting in slow action
After the above inspection, it is finally confirmed that the pump is leaking due to high temperature, and the pump needs to be disassembled for inspection
