The steering oil leaks from the upper part of the oil leakage, and the seal ring of the steering valve body and the valve body is damaged; the lower part leaks oil, the lower cover bolt is loose, or the gasket is damaged, or the seal ring is damaged.
During hydraulic steering, the steering wheel operates a heavy hydraulic pump failure; when the manpower is turned, the check valve is not tightly sealed; the safety valve is improperly adjusted; the safety valve spool is stuck by dirt or the safety valve is damaged.
Steering delay Hysteresis steering wheel vertical shaft and valve core connection key teeth wear, excessive clearance; pin wear, pin and joint clearance is too large; rotor internal teeth and linkage key teeth wear, excessive clearance; spring piece break or elastic Weakened.
0 Steering speed is slow or there is no steering action Oil leakage at the piston seal of the steering cylinder, internal leakage occurs; the piston rod of the steering cylinder is broken; the pin or the coupling is broken.
After the engine is turned off, the stator and rotor without manual steering are severely worn; the oil inlet check valve is damaged; the two-way buffer valve is stuck or damaged by dirt.
The steering wheel oscillates back and forth or the reverse relative position of the steering reverser and the rotor is misplaced; the hydraulic cylinder joint on the steering gear is misplaced.
It is difficult to ensure accurate steering or straight-line steering piston piston seal wear; the steering cylinder safety valve or compensating valve is stuck in the open position; the steering gear is seriously worn.
The steering wheel is biased and the spring piece is broken or the elasticity is weakened; the valve sleeve and the valve core are stuck in the turning position; the dial pin is deformed or damaged.
The front wheel vibrates the hydraulic system intake; the steering cylinder two-way cushion valve or compensating valve is caught in the open position by the waste.
Under normal circumstances, the steering is difficult or only the steering steering pressure is insufficient to the side; the steering gear leakage is severe; the steering cylinder two-way damping valve is out of adjustment.
The military hydraulic pump safety valve is loaded with the valve tank pressure and the measured steering gear. In order to test the need, a special test tube is designed. Each end of the tube has a threaded joint, which is respectively connected with the hydraulic pump outlet port loading valve and the measured steering gear.
The pressure oil enters the steering gear through the pipe, and the pressure of the loading valve can be read from the pressure. The main test items of the diverter and the diverter are connected to the main test items and the test process to detect the valve leakage. The pipe is connected to the diverter inlet, and the steering wheel is rotated to keep the valve sleeve in the steering position. Then turn the loading valve so that its pressure is close to the safety valve and the pressure relief valve is not open.
Use a torque meter to turn the spool. When the torque is 34N, m, keep 8 to see if any oil flows out of the diverter outlet. If the leak occurs after less than 8 hours, the spool valve sleeve needs to be replaced.
The check valve spool is installed in the same way as the initial condition. Loosen the steering wheel, if the spool can automatically return to the neutral position, the oil will flow back to the tank from the diverter outlet.
The seal installation is tested to be the same as the initial condition. The steering wheel was held in the steering position for approximately 3 mi and the seal was observed for oil leakage.
Detecting the safety valve opening pressure installation and initial conditions are the same as 1. Turn the load valve to gradually increase the steering load pressure and test the safety valve opening pressure.
The detection two-way buffer valve opening pressure pipe is connected to the hydraulic cylinder hole of the steering gear. Turn the steering wheel to the right to put the steering gear in the steering position; turn the loading valve to gradually increase the steering load pressure and test the two-way damping valve opening pressure. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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