6 Common Failure Causes of Rear Tipper and Side Dump Semi Trailer Lifting

Many drivers and friends often encounter various failures when lifting and unloading the cargo during the use of dump trucks. Let me follow the editor to understand the common failures and problems of rear tipper dump semi trailer and side dump semi trailer during lifting. Analysis of its reasons.

Fault 1: It is difficult to lift the carriage

Cause Analysis:

1. Insufficient oil in the fuel tank;
2. The filter screen or pipeline of the fuel tank is seriously blocked;
3. The oil pump is faulty and does not supply oil;
4. The lifting switch is blocked, the distribution valve and oil return valve are stuck;
5. The overflow valve is seriously out of adjustment, and the high-pressure oil pump leaks;
6. The lifting cylinder and the limit valve are stuck, so that the gas path leading to the distribution main valve is connected for a long time;
7. Insufficient air pressure of the air storage tank;
8. Poor work of power take-off and oil pump gear;
9. The hydraulic oil is not clean and the impurities are stuck to the distribution valve.

Fault 2: The lift of the dump truck compartment is slow and weak, and there is movement

Cause Analysis

1. There is air entering the hydraulic system, generally because the oil return path is not smooth, and the friction resistance of the lifting cylinder is too large;
2. The limit valve of the lifting cylinder is not tightly sealed or out of adjustment, and the sealing ring of the lifting cylinder is not tightly sealed and worn;
3. The oil volume of the fuel tank is insufficient, and the gear pump cannot reach the specified oil discharge volume;
4. The pipeline is seriously blocked or leaks.

Fault 3: The compartment cannot be lifted when the load is heavy

Cause Analysis

1. Severe overload;
2. The dump truck is parked on a slope that slopes forward severely;
3. Oil viscosity is too low;
4. The pipelines, valves and cylinders all have leakage failures.

Fault 4: The compartment falls by itself after being lifted

Cause Analysis:

1. Most of the one-way valves are stuck;
2. The sealing ring of the lift cylinder is poorly sealed;
3. The distribution valve is stuck and not fully in place;
4. There is leakage in the pipeline.

Fault 5: The carriage does not fall

Cause Analysis:

1. Insufficient air pressure cannot make the oil return action of the distribution valve;
2. The limit valve pipeline is damaged, and the lift switch and lift cylinder are stuck.

Fault 6: The lift of the dump truck compartment cannot stop at any position

Cause analysis:

The oil is too dirty, so that the check valve is not tightly sealed or the distribution valve and oil return valve are not tightly sealed.

The above is the analysis of the common faults and their causes in the lifting process of the rear tipper dump semi trailer compartment, and I hope it can be helpful to you!