No action is one of the more common failure phenomena during the excavator operation. Usually, the excavator can start normally, but there is no action for the whole vehicle. At this time, all the bosses must be very impatient. Don't worry, let's talk about how to troubleshoot and repair once the whole car has no action.
A Kobelco excavator, the owner inquired that the Kobelco SK250-8 excavator suddenly showed no movement of the whole vehicle today, the engine and hydraulic pump were running well, and there was no abnormal sound. After inspection: enough hydraulic oil, dismantle the pilot pump hydraulic pump spindle It is running well, the main hydraulic pump is well connected to the engine, the engine cannot be started when the hydraulic lock is opened, the test lamp at the hydraulic lock valve detects the voltage of 24 volts (24V light bulb is on), the test lamp at the hydraulic lock solenoid valve is checked, and the voltage is about 3, 4 Volt (24V test light is just red), the display shows P1 \ P2 pressure 17, 8kg / cm2. Where is the problem? Directly lead the 24V power test machine to check? "
Basic information of excavator
Equipment brand: Kobelco
Equipment model: SK250-8
Working hours: 12000 hours
Year of delivery: 2012
Failure analysis:
Check whether the hydraulic lock has pilot pressure oil output, and check whether the pilot solenoid valve is stuck.
Check whether the safety lock solenoid valve has oil coming in and out. Check the pilot pump without oil coming; check the solenoid valve or circuit if there is oil coming out.
The Kobelco SK250-8 excavator suddenly showed no repairs for the whole vehicle:
It is a problem with the hydraulic lock solenoid valve. After replacing the new part, the phenomenon disappears and the action returns to normal.
