1. Steering gear malfunction

Once it is discovered that the reason for the low hydraulic pressure and heavy direction of the steering gear is the steering gear. At this point, manufacturers should be invited for repairs. Generally speaking, steering gear failures are mainly caused by piston or cylinder strains or damage to the sealing rings on the piston, resulting in the inability of the two piston chambers to exchange effectively and establish boost pressure. In addition, damage to various sealing rings on the circumferential surface of the piston and the sealing rings on the screw can also cause high pressure relief and lower the boost pressure to the bottom.

2. The booster pump is malfunctioning

According to experimental judgment, when the pump pressure of the booster pump does not reach the standard value, it is obvious that the heavy direction is related to this. Firstly, check the mating surface between the TEREX spare control valve and the valve seat, as well as whether the steel ball of the safety valve is not tightly closed. If there is a leakage in the flow valve or safety valve, it can be repaired by grinding. Secondly, check if the spring of the safety valve has failed. This can be checked by adding a gasket behind the torsion spring. If a gasket is added behind the torsion spring, a significant increase in pump pressure indicates that the torsion spring has failed. If both positions are fine. Disassemble the booster pump and observe whether the chamber wall of the vane pump is worn or pulled. Due to wall strain, the high and low pressure chambers will communicate and pressure cannot be established. The common cause of strain is oil. If the direction suddenly becomes heavy, check if the TEREX spare part of the Terex accessory is caused by a broken pump shaft.

3. The pump oil filter in the oil storage tank is blocked

The long-term lack of maintenance of the pump oil filter in the oil storage tank, as well as the replacement of TEREX spare parts by Terex, can cause blockages and hinder the circulation of the booster oil, leading to an increase in pump oil backpressure, which can also make the direction heavy.

4. Fuel shortage in the power assist system

If the power system lacks oil, causing gas in the system, not only will the steering be heavy, but there will also be noise during steering. At this point, follow the oil discharge procedure for exhaust.

5. The sealing rings of two positioning valves have failed

Causing the two chambers of the piston to communicate with each other, resulting in the failure of power assistance.

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