106 steering hardening

Let it be easy, my car has 99 model 106 xr for 3 days and there has been a steering hardening problem and it has increased even more today. I did not make my car the right hub ball change. Is there anything to do with it? He was doing it only when he stopped within 2 days, but this morning, as if I woke up, what could be the reason that the tire is not spinning? hydraulic oil has lost its feature I bought it, I do not change the area has been 2 years.

I do not think it is from oil, is there any leakage in the hydraulics, the oil may have decreased, the pump may have malfunctioned ...

My friend's 106 steering wheel got hardened in a moment, he even brought it to the master with the frightened hammer, the master looked at the steering pump.

STEERING THE STEERING HYDRAULIC CHAMBER ADDING ADD TO THE ADDITIONAL HYDRAULIC.