If the hydraulic oil pump and motor fail, they shall be replaced in time and sent to the designated professional maintenance department for maintenance. When removing the old oil pump and motor and installing the new oil pump and motor, the following points shall be noted:
When removing the old oil pump and motor, the oil pipe shall be removed first, and all oil ports on the oil pump and oil pipe shall be immediately sealed to prevent dust from entering the oil pump and oil pipe, and then the oil pump shall be removed from the mixer truck;
Install the oil pump and motor stably, pay attention to the good alignment of the assembly, tighten the bolts, unseal the oil port of the oil pump and motor, and connect the oil pipe.
After all oil pipes are installed, fill the hydraulic oil to the specified oil level and drain the air in the system;
Check the oil level of the oil tank. If it is not in place, add clean hydraulic oil in place;
Start the automobile engine and run it at idle speed for 10 minutes (when the oil pump is in neutral position and the mixing drum does not move), check the noise of the oil pump and motor and whether there is oil leakage in each oil pipe;
When disassembling the old oil pump and motor of the mixer truck, the oil pipe shall be removed first, and the oil port on the oil pump and oil pipe shall be immediately sealed to prevent dust from entering the oil pump and oil pipe, and then the oil pump shall be removed from the mixer truck.
Install the oil pump and motor smoothly. Note: tighten the screws to seal the oil pump, motor, oil port and connecting pipe.
After all oil pipes are installed, unscrew the oil plug at the R port of the oil pump, exhaust the air in the pump, and then tighten the oil plug at the R port until the oil flowing from the R port contains no gas
Remove the motor, fill the motor with clean hydraulic oil from the top T-port connector until it is full, and then tighten the pipe connector.
Check the oil level in the oil tank of the mixer truck. If it is not above the middle of the liquid level, clean hydraulic oil must be added locally.
Start the engine, idle for 10 minutes (both handles of the control box are in the middle position, and the mixing drum does not move), check the noise of the oil pump and motor, and check whether there is oil leakage from each oil pipe.
Slowly operate the control lever to make the mixing drum rotate in a slower feeding direction for 20 minutes (there is no material in the mixing drum, and the trolley is idling);
Return the control lever of the automatic cement mixer to the middle position to stop the mixing drum, check the oil level in the oil tank, and add oil to the middle position.
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