As a transportation vehicle, the concrete mixer truck must implement the maintenance and repair system of “regular inspection, mandatory maintenance, and condition-based repair” in terms of maintenance and repair. Under this major premise, combined with the actual situation of the concrete mixer truck, maintenance and repair can be done to extend the service life of the concrete mixer truck. How to extend the service life of the concrete mixer truck in daily use? The editor of CIMC made a detailed summary for everyone, let’s take a look at it together.
1. Cleaning of storage tank (mixing drum) and inlet and outlet
Since concrete will solidify into a hard block in a short time and is corrosive to steel and paint, it is necessary for daily maintenance to wash the concrete adhering to the concrete storage tank and the inlet and outlet after each use of the concrete storage tank. Serious work. These include:
a. Rinse the feed port with water before each filling to keep the feed port moist during filling;
b. Fill the washing water tank that comes with the car with water while loading;
c. Rinse the feed port after loading, and clean the remaining concrete near the feed port;
d. After unloading at the construction site, flush the discharge chute, and then add 30-40 L of cleaning water to the concrete storage tank; keep the concrete storage tank rotating slowly when the vehicle returns;
e. Remember to drain the sewage in the concrete storage tank before loading the next time.
2. Maintenance of reducer
According to different service periods, the reducer should be maintained in the following examples:
a. Oil change: Change the oil after 500 hours of use in the first period, and change the oil every 1500 hours thereafter. As long as one year, no matter how many hours it has been working, the oil must be changed.
b. Oil: The reducer of this vehicle is imported with original packaging. The gear oil used is heavy-duty vehicle gear oil GL-5, with a viscosity grade of 85w/140.
c. Recommendation: Drain the oil when the oil temperature is around 60 degrees. After each oil change, check the tightness of the connecting bolts. Check the oil level once a week.
3. Maintenance of radiator
Under normal circumstances, the filter element of the radiator is replaced in a fixed cycle. The filter element is replaced in a new car for 3 months, and then replaced every 6 months. The accuracy of the filter element is consistent with the original filter element. Check whether the radiator fan is running every day, and air gun every week. Clean the surface of the radiator blades to ensure that the radiator works normally.
4. Maintenance of hydraulic pumps and hydraulic motors
The hydraulic pumps and hydraulic motors are also imported parts. The hydraulic oil used is 68# anti-mo hydraulic oil. Generally, please replace the hydraulic oil after 3 months of new use. The time to replace the hydraulic oil under normal use shall not exceed 12 months. Different brands of hydraulic oil cannot be mixed. When replacing new hydraulic oil, the hydraulic circuit (including hydraulic pump, hydraulic motor, oil pipe, oil pipe joint, radiator) must be cleaned, otherwise it will cause the failure of hydraulic pump and hydraulic motor. Shorten its service life.
5. Maintenance of supporting roller
Grease should be added regularly every 3 months, and the surface of the supporting roller of the mixing drum should be filled with oil once a day to avoid abnormal wear of the supporting roller.
6. Maintenance of the drive unit
The function of the driving device is to drive the rotation of the concrete storage tank. It is composed of a power take-off, a cardan shaft, a hydraulic pump, a hydraulic motor, a control valve, a hydraulic oil tank and a cooling device. If this part stops working due to a malfunction, the concrete storage tank will not be able to rotate, which will cause the concrete in the vehicle to be scrapped, and even the whole tank of concrete will condense in the tank, causing the concrete mixer truck to be scrapped. Therefore, whether the driving device is reliable is an issue that must be paid attention to in use. In order to ensure the integrity and reliability of the drive device, the following maintenance work should be done:
a. The universal rotating part is the part where failures frequently occur. Grease should be added on time, and the wear condition should be checked frequently and repaired and replaced in time. The team should have a spare cardan shaft assembly to ensure that it can resume work within tens of minutes in the event of a failure.
b. Ensure that the hydraulic oil is clean. The working environment of the concrete mixer truck is harsh, and the dirty cement sand must be prevented from entering the hydraulic system. The hydraulic oil should be replaced regularly according to the requirements of the user manual. Once the hydraulic oil is found to be mixed with water or sand during the inspection, it is necessary to stop the machine immediately to clean the hydraulic system and replace the hydraulic oil.
c. Ensure that the hydraulic oil cooling device is effective. It is necessary to clean the hydraulic oil radiator regularly to prevent the radiator from being blocked by cement, check whether the electric fan of the radiator is running normally, and prevent the hydraulic oil temperature from exceeding the standard.
7. Clean up impurities in time
The inlet and outlet devices and the exterior of the car body should be cleaned with water to prevent the concrete from condensing on the wall of the cylinder and the blades. If there is a local concrete hardened block, it should be removed as soon as possible, but the parts should not be damaged.