Phenomenon of vehicle steering, steering wheel was heavy, and there is no back is feeling.
Steering knuckle arm deformation.
Steering knuckle bearing oil shortage or damage.
Steering knuckle king pin and bushing gap is too small or short of oil.
Front axle or frame deformation caused by wheel alignment phrase.
Tire pressure is insufficient.
Diagnosis diagnosis from the first front axle, turn the steering wheel by hand, if it is easy to feel to have no longer turn difficult feeling, this suggests that the failure parts in front axle and the wheel.
Because set up after the front axle and steering has no wheels and road surface friction resistance, but only depends on the working condition of steering, etc.
At this point should be check carefully whether the front tire pressure is too low, the front axle without deformation;
At the same time also want to consider leaf spring are in good condition before inspection, frame with and without deformation.
When necessary, check the wheel alignment Angle is correct.
Relevant tags: semi-trailer axle