Steering wheel force check
1. Before checking, check the tire pressure, tire type and wheel contact surface.
2. The vehicle must be on a level surface.
3. Determine the force on the steering wheel.
A) Stop the vehicle on a level surface and set the steering wheel to the straight ahead position.
b) Start the engine at idle.
V) Using a torque wrench, measure the force in both directions by turning the steering wheel a quarter turn left and right.
- Maximum allowable force - 3 Nm
G) Check the tightness of the steering wheel nut.
- Tightening torque - 50 Nm
Fluid Pressure Check
1. Disconnect the pressure pipeline from the case of the steering mechanism.
2. Connect a pressure gauge as shown in the figure and bleed the system (see section "Bleeding the power steering system")
Note:
- Make sure the pressure gauge valve is open when connecting.
- Wrap the connection points of the pump with the sealing flight pipeline.
3. Start the engine.
4. Turn the steering wheel from lock to lock two or three times to warm up the fluid.
- Operating fluid temperature - 50°C
5. Check the pressure of the working fluid with the pressure gauge valve closed.
- The minimum allowable pressure is 6.2-6.9 MPa
Note: Do not keep the faucet closed for more than 10 seconds.
6. Check fluid pressure with gauge valve open.
A) With the engine idling, open the valve fully.
b) Measure fluid pressure at engine speeds of 1000 rpm and 3000 rpm.
- The maximum allowable pressure difference is 0.5 MPa
Note: Do not turn the steering wheel.
7. With the engine idling and the valve fully open, turn the steering wheel to the maximum angle and check the fluid pressure.
- Minimum allowable pressure: - 6.2 - 6.9 MPa
Attention: do not hold the steering wheel in the extreme position for more than 10 seconds.
8. Disconnect the pressure gauge.
9. Connect the pressure pipeline to the case of the steering mechanism.
10. Bleed the power steering system.
11. Check for fluid leaks.
Checking the booster pump drive belt
Press the belt with a force of 98 N and measure the deflection of the belt.
Drive Belt Deflection:
- new 6.5- 9.0 mm
- used 7.5 -11.5 mm
Notes:
- "New belt" is a belt that has been on the engine for less than 5 minutes.
- "used belt" - This is a belt that has worked on the engine for 5 minutes or more.
- After installing the belt, check that it is properly seated on the pulleys.
Checking the fluid level
1. Put the car on a horizontal platform.
2. Start the engine.
3. Check for foaming or emulsification of fluid, fluid level and top up if necessary.
Notes:
- Foaming or emulsification indicates either air in the system or fluid level too low.
- At a temperature of 40-80°C, the liquid must be in the range "NOT" in the tank, at a temperature of 0-20°C - in the range "COLD". Add fluid if necessary.
Bleeding the power steering system
1. Fill the working fluid into the tank so that the upper level of the working fluid on the dipstick is 10-15 mm above the mark "MAX" in the interval "COLD".
2. Start the engine at idle. After air bubbles stop appearing in the working fluid, turn the steering wheel from lock to lock, holding it in the extreme position for 2-3 seconds. Repeat this procedure three to four times.
Notes:
- Do not hold the steering wheel in the extreme position for more than 10 seconds, so that the temperature of the working fluid does not become too high.
- At a temperature of 40 - 80'C, the liquid in the tank should be in the range "NOT"
- The maximum increase in the liquid level in the tank is 5 mm
3. Check for foaming or emulsification of the liquid. If foaming or emulsification is present, check for leaks in the system.
Replacing the working fluid in the power steering system
1. Remove the front wheels of the car and place it on stands.
2. Disconnect the drain hose from the expansion tank.
3. Drain the working fluid into a container.
4. Start the engine at idle.
5. Turn the steering wheel from lock to lock while draining the fluid.
6. Turn off the engine.
7. Fill reservoir with fresh fluid.
8. Start the engine and when the working fluid begins to flow out of the return hose, stop the engine immediately.
9. Repeat steps 7 and 8 several times until there is no air left in the liquid.
10. Connect the drain hose.
11. Take the car off the stands
12. Bleed the power steering system.
Note: do not hold the steering wheel in the extreme position for more than 10 seconds, so that the temperature of the working fluid does not become too high.