1997 AUDI A4 Hydraulic Changing And Bleeding Fluid Workshop Manual

47-27

CAUTION!

Always dispose of used brake fluid properly.

On vehicles with manual transmission, the
clutch slave cylinder must also be flushed
out with new brake fluid.
On models with the electronic Stability
Program (ESP), note that the hydraulic pump
is actuated for 10 seconds using "Basic
Settings" function 04, display group 002
page 45
-49
.
Note the following when bleeding clutch
hydraulics:

- Connect US1116 but do not switch on yet.

- Open bleeder screw on clutch slave cylinder.

- Attach collector bottle hose.

- Switch on bleeder unit and allow approx. 100 cc
(6 oz.) of brake fluid to flow out of clutch slave
cylinder.

- Close bleeder screw.
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The sequence described below must be followed
for all four brake calipers.

1 - Right-rear brake caliper

2 - Left-rear brake caliper

3 - Right-front brake caliper

4 - Left-front brake caliper
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47-28

- Attach bleeder hose from brake fluid collector to
bleeder screw.

- Open bleeder screw and allow about 250 cc (15
oz.) of brake fluid to drain out.
The action of pumping in new brake fluid flushes
the used brake fluid out of the system.

- Close bleeder screw.

- Check brake pedal pressure and pedal free
play.

Max. free play: 1/3 of pedal travel.
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