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disassemble it. If replace the power steering pump only, the trouble may not be solved, even new
troubles may occur. Therefore carry out fault diagnosis at first, and then eliminate it once find out the
reason.
A power steering pump having been in normal operation is unlikely to have defect on its own in the
future service. If this pump can rotate freely without any abnormal sound, it need not be anxious to
determine that its operation is in trouble. The experience shows that most of the faults thereof are
related to improper use of vehicle. Therefore, it is recommended to check tyre pressure, hydraulic
pipeline, driving system, fluid level inside and screen of the reservoir, pipe joints, and power steering
fluid on vehicle at first. After the diagnosis is finished, the pump may be removed if necessary for further
analysis and inspection which shall be carried out in professional repair shop or the manufacturer of the
diesel engine.
