Single bridge liberation dump truck can not escape such a fate

First of all, explain to everyone what a single axle dump truck is. It refers to the dump truck with only one rear axle and one differential behind it. Everyone knows that Liberalization is an old brand, but some failures cannot escape even a single-bridge liberation dump truck. The following Xiaobian gives you a summary analysis of these common faults.

The two most common failures of a single-bridge liberation dump truck are the maintenance of the hydraulic transmission system and lifting and falling of the carriage. Below, we will introduce you separately.

The wear of the oil pump main and driven gear journals and bearings of the dump truck hydraulic system will cause an increase in the meshing clearance, which will result in a decrease in the displacement of the oil pump, which in turn will degrade the smoothness of work and generate noise. This running-in also causes the radial clearance between the gear and the pump chamber to change, which causes the centerline of the gear to shift toward the oil inlet chamber. This makes it easier to produce radial runout during operation, resulting in a larger or smaller area. Larger gaps can cause leaks, pump flow and pressure drop, and gaps that are too small will cause tip friction and pump cavity damage. The abrasion, scratching, and flaking of gear end faces and pump body end caps or end face bearings will cause the oil pump to leak into and out of the oil chamber, which will increase the loop. Therefore, the oil leaking from the oil outlet chamber through this circuit and the oil in the oil inlet chamber will increase. Pump pressure and flow drop. The above-mentioned failure caused by the abrasion damage was found, and after the cause was ascertained, the replacement was immediately repaired.

For the single-bridge liberation dump trucks, more failures are caused by the difficulty of lifting the vehicle or the occurrence of turbulence, or the car does not fall after lifting or cannot stop at any position. The reasons for these problems can be attributed to the following: Several types: Insufficient oil or blocked oil supply, poor working of some devices, poor air pressure, failure to operate the oil distribution valve of the distribution valve, damage to the pipeline of the limit valve, and seizure of the lift switch and lift cylinder. Back to the oil road is not smooth, lifting cylinder friction resistance is too large, dirty oil, so that the check valve is not strict and so on.

When these situations occur, we must first check whether there is enough oil level. If it is not enough, add it as required. The second is to check whether the working conditions of the power take-off control mechanism are normal, whether there is any leakage in the oil or air path, and if necessary, check whether there is any blockage. Check whether the working status of the oil pump, distribution valve, limit valve, etc. is good, and whether the lift cylinder has good sealing and repair if necessary. The various operating valves of the control system malfunction and should be replaced with new ones. The hydraulic oil is not clean, causing blockage of the oil line or insufficient hydraulic pressure. The action is slow and the hydraulic oil should be replaced when the car is not lifted. If the oil pump transmission mechanism or the gear shaft sleeve is damaged and cannot be operated and the internal leakage is serious, the replacement parts should be repaired.

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