The reasons for the lack of boost are determined by checking the oil pressure under the following operating conditions:
- no impact on the steering wheel;
- turn the steering wheel all the way.
No impact on the steering wheel
At any engine speed, the pressure in the hydraulic system of the power steering should not exceed 5-7 bar. If the pressure is too high at idle, the valve is faulty. If the pressure is too low at high engine speed, the regulator is faulty.
Turn the steering wheel to the stop
Note: Check the pressure with the wheels turned all the way as quickly as possible, otherwise the fluid will become very hot.
When turning the steering wheel to the stop, the maximum pressure should be:
- engine F - 86-93 bar;
- engine Z - 93-100 bar;
- engine G - 93-103 bar.
When turning the steering wheel from side to side, the pressure deviation should not exceed 5 bar.
If the pressure is too low and the pressure gauge needle is shaking, then the regulator is faulty.
[Article reprinted from the website: www.Renaultbook.ru]
If the pressure is too low and the pressure gauge needle does not shake, then the drive belt is loose, the valve is faulty, or there is an internal leak in the power cylinder.
If there is a large pressure deviation when turning the steering wheel from side to side, then the valve is faulty.