Fault one, when there is abnormal sound

When the steering is abnormal sound is generally mechanical parts, such as the main pin and bushing damage, column thrust bearing damage caused by. Inspection can be left, right direction, the sound of the location of the inspection and inspection.

Fault two, steering engine oil leakage

The steering engine oil leakage is not more than a few positions: the steering machine cover, the side end cover and the steering shaft crank arm connection place. There are three parts of the sealing ring, the replacement of the new oil seal and sealing ring can be solved. If the other parts of the oil spill is likely to turn to the case of the case of a leak or crack. Small cracks and can be used for the 290 high penetration of the Thai Thai music to plugging the high permeability.

Fault three, direction back to the more difficult

General vehicles have a steering automatic return function. Hydraulic power of the car, due to the role of hydraulic damping, automatic return of the function has weakened, but still should maintain a certain level of automatic return. If you return to the position, as when turning to the force, it shows that the return function is faulty. This failure generally occurs at the turn of the mechanical part. Such as the steering knuckle pin and bushing short of oil and burning, steering knuckle, straight rod joint is short of oil and rust, steering wheel and steering machine connected to the control shaft universal joint lack of oil or other strength and steering gear steering shaft gear and piston straight tooth meshing too tight and so on, will cause the failure.

Fault four, booster pump leakage

If the rear end of the pump from the pump cover, it is clear that the back cover seal ring damage, which is relatively easy to find. In practice there is a hard to find fault, which is to oil tanks in the shrinking (total need to supplement), and the bottom of the engine oil in the oil are growing or on the surface looks engine did not burning oil. The release of the oil at the bottom of the oil is no abnormal phenomena, but also sniff out any other peculiar smell, this is obviously a booster pump drive shaft end of the oil seal. The hydraulic oil of the low pressure oil chamber of the booster pump is leaked from the oil seal to the timing gear chamber of the engine. Hydraulic oil mixed with oil can't tell.

Fault five, steering heavy

Generally speaking, there are several reasons why the direction is heavy:

(1) steering gear failure

By checking if it is found that the steering gear is low when the oil pressure is low, the direction of the direction of the heavy. At this time should be invited to professional manufacturers to repair. Generally speaking, most of the steering machine failure is due to the piston, cylinder, or damage caused by the piston seal ring two cavity, so that the pressure can not be effectively established. In addition, the sealing ring on the circumference surface of the piston and the sealing ring on the steering screw can cause high pressure unloading, and the bottom of the power assisted pressure is reduced.

(2) booster pump failure

Through the test to determine the pump pressure can not reach the standard value, it is clear that the direction of the relevant. First should check the flow control valve and the valve seat of the mesh surface, the safety valve ball is closed. If the flow valve or safety valve leakage, can be repaired by grinding method. Second check the safety valve spring failure. This can be followed by the spring back of the method to check, if the spring behind the increase of a gasket, the maximum pump pressure has increased significantly, that the failure of the spring.

If there is no problem in these two parts, then remove the booster pump, and observe whether the cavity wall of the vane pump is worn and torn. Because the cavity wall strain can cause the high, the low pressure cavity to be interlinked, thus causes the pressure to establish does not rise. The reason for the general strain is that the oil is dirty. If the direction suddenly heavy, it should check whether the pump shaft fracture caused by.

(3) lack of oil, the system has air. If the power system is short of oil, there is air in the system, which is not only heavy, but also noise when it is turned. At this point, according to the procedures for gas and gas exhaust can be.

(4) oil return filter clogging in oil storage tank. Oil tank return oil filter for a long time without maintenance, replacement, resulting in blockage, so that the power booster oil circulation is not smooth, resulting in oil back back pressure increased, the same will make the direction of heavy.

(5) the sealing ring of the two limit valve fails, so that the piston two cavity is communicated with the power failure.

1, unilateral heavy

In practice often occurs in a direction to brisk, and in another direction to heavy fault, which is generally responsible for sealing side of high pressure chamber of the seal leakage to the. But if the steering screw sealing ring, the circumference of the piston oil sealing rings etc..

There is also a situation should pay attention to, that is, to heavy, one side of the limit valve closed. Tight closure may be improper adjustment, so that the majority of the limit valve in the normally open position, or the valve and the valve seat is closed, more of the situation is the limit valve on the 0 "two" type of seal failure caused by.

Sometimes occur towards a particular aspect from beginning to end is very light, and to another direction, began to very light, per dozen to a certain position, the direction was a sudden heavy. This failure in general is due to the direction of the adjustment of the valve is not properly, so that the wheel has not reached the limit, the limit valve on the unloading, then the direction of the heavy. In case of this failure as long as the last section of the limit valve on the re adjustment of the line.

2, on both sides of the heavy.

If in case of fault direction heavy, especially to played on both sides of the direction of heavy, should be to find the reasons from two aspects: mechanical part of a search for steering, if there is no problem with mechanical parts, then find steering the reason.

Cause heavy machinery in the direction of the main reasons