18 Steering System, Bleeding and
Checking for Leaks
⇒ “18.1 Power Steering System, Bleeding”, page 376
⇒ “18.2 Steering System, Checking for Leaks”, page 376
18.1 Power Steering System, Bleeding
– Check the power steering fluid level and add if necessary.
– Raise vehicle until front wheels are off the ground.
– Start engine and let it run at idle for approximately five sec‐
onds.
– Turn off the engine and check the hydraulic fluid level.
– Repeat the procedure one more time.
– Start the engine again and turn the steering wheel three times
from stop to stop while the engine is idling.
– Turn off the engine and check the hydraulic fluid level. Fill if
necessary.
– Repeat the procedure two more times.
To dissipate gas of hydraulic fluid, let engine stand two to three
minutes.
– Lower vehicle.
– Now, once more, turn steering wheel 5 times from stop to stop
at idle speed.
Steering system has been bled when air bubbles no longer rise
to the surface in hydraulic fluid reservoir.
18.2 Steering System, Checking for Leaks
Note
Following installation operations and with no hydraulic fluid in the
expansion tank, the steering system must be checked for leaks.
– Start the engine.
– Turn steering wheel in both directions to full lock and hold
briefly. This builds up the largest possible pressure (at idle on‐
ly).
In this position, the following components must be checked for
leaks.
♦ Seal ring for steering pinion at the steering gear valve housing.
♦ All line connections.
♦ Seal rings for steering rack.
This test can only be performed with boot slid back.
– Open clamp for boot.
– Push back the boot. If fluid is visible in steering gear housing
and/or in bellows, steering gear must be replaced.
Jetta 2011 ➤ , Jetta 2013 ➤
Suspension, Wheels, Steering - Edition 08.2015
376 Rep. Gr.48 - Steering
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