Common Issues and Repair Methods of Self Loading Mixer Truck

As more and more users use self-loading mixer truck on construction projects, it will lock up if it is not cleaned in time or not clean well. So here will shows the common issues and repair methods of self loading mixer truck.

3 Common Issues and Repair Methods of Self Loading Mixer Truck

Walking Weakness or Oil Temperature is Too High

When the self-loading mixer truck is unable to walk or the oil temperature is too high, it is necessary to judge whether the clutch piston is not tightly sealed or the oil pressure is insufficient. However, it is sometimes difficult to determine which cause is causing the failure by conventional detection methods, especially when there is no power, it is even more difficult to check the sealing rings of the assembled transmission assembly. At this point, the air pressure valve can be used for testing.

Remove the transmission control valve of the self-loading mixer truck (the assembled transmission should be installed before the control valve);

Supply 0.6 to 0.8 MPa of gas to each oil hole of the transmission in sequence. If a certain hole is filled with gas, there is a “bang” sound and there is no or very small gas leakage sound. Import the metering pump, then It shows that the seal between the corresponding clutch piston and cylinder is good;

If the movement of the piston pressing against the friction plate cannot be heard and the sound of air leakage is loud, it means that the seal between the clutch piston and the cylinder is invalid, and the seal should be replaced.

self-loading Mixer Truck Shaft Holding

It may be due to the location of the water inlet pipe and the flushing water of the mixing machine. If the position of the flushing point and the flushing direction are not correct, or the flushing pressure is too low, after the water enters the main engine, it cannot wash away the concrete temporarily bonded to the shaft, and it will easily form the shaft after a long time.

It may be a problem with the direction of raw material feeding. The materials used in mixing concrete are mainly sand aggregate, cement, fly ash, water and admixtures. If the raw material cement is wrapped with sand and gravel and agglomerates with water, if the mixing is not sufficient, it will easily stick to the mixing shaft. If the direction of the cement inlet is unreasonable, the mixing shaft cannot be mixed quickly and fully, and it is easy to form a shaft holding phenomenon.

The interior of the mixer is not cleaned in time after the work is completed, or the cleaning is not clean, resulting in residual concrete on the surface of the mixing shaft, which solidifies on the mixing shaft after drying.

Reasons for the Tripping of the Self-loading Mixer Truck

Too much material is fed, causing excessive load on the mixer.

The V-belt is too loose, which makes the power of the transmission system low.

The safety inspection switch on the upper cover of the mixing main engine is loosened by vibration, causing the machine to stop.

The gap between the mixing system blade and the liner is too large, and the resistance is increased during the mixing process.

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