Maintenance work
The power steering transmission uses the ATF fluid known from the automatic transmission as a hydraulic fluid (see chapter on lubrication). The vane pump creates high pressure in the fluid, so even a small loss of tightness should be considered a large loss of fluid. For safety reasons - after all, the steering without servo support immediately becomes heavy - it is necessary to check the tightness of the system. Let us repeat once again: the car does not lose control even without steering force support - although it is much more difficult to control. Here is a description of the test:
The check is carried out to a certain extent by monitoring the liquid level in the expansion tank. Because if there is no liquid, it could have spilled somewhere. If so, then:
With the engine running, turn the steering wheel to the right and left once until it stops. This creates the highest pressure in the servo control tubes and any leaks become visible.
Hold the steering wheel against the lock and look for leaks in the following places:
In the pump piston valve: This is located approximately where the steering column enters the steering gear.
In the servo control vane pump: When detecting a leak, the engine must first be washed.
At the pipe connections: check all connections one by one and tighten if necessary.
(Source is on the website: www.OPELBOOK.ru)
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