5 Series E39 528i (M52) SAL
34 00 017
Checking brake booster (low-pressure test)
Special tools required:
•
34 3 100
Remove left microfilter for interior ventilation.
-
Detach hose from connection piece. Install vacuum tester
34 3 100 between connection piece and vacuum hose of
non-return valve.
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Start engine.
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Check buildup of partial vacuum.
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Switch off engine.
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By pressing the brake pedal, set a vacuum pressure of no
more than 0.8 bar and wait for the the value to stabilize.
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When the brake pedal is not pressed, the vacuum pressure is
permitted to drop over a test period of 1 minute by max.
0.06 bar.
If specified values are not reached:
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Check line connections for vacuum seal.
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Replace vacuum non-return valve.
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Check seal between brake booster and brake master cylinder
(sealing ring) for perfect condition and correct seating.
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If the specified values are not achieved when the test is
repeated, you must replace the brake booster.
RA Checking brake booster (low-pressure test)
BMW AG - TIS
21.02.2013 21:07
Issue status (12/2007) Valid only until next DVD is issued
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