5 Series E39 525tds (M51) TOUR
34 00 519
Checking service brake: high- and low-
pressure tests
Important!
The high/low-pressure test (leakage test) must be carried out
with the engine switched off.
High-pressure test (leakage test):
Perform test on both brake circuits.
1st brake circuit, front axle
2nd brake circuit, rear axle
Remove bleeder screw, connect pressure tester and bleed.
Load brake pedal with a force and block brake pedal with pedal
support, refer to Technical Data.
After 2 minutes, pressure is permitted to drop by max. 8
%
.
Low-pressure test:
Perform test on both brake circuits.
Reset pedal support until test pressure in braking system is 2 ...
5 bar.
Vehicle and measuring apparatus must remain steady as
vibrations will distort the result.
Pressure must remain constant for a test period of 5 minutes.
Check all rubber parts in case of excessive pressure drop.
Bleed brake calipers and wheel brake cylinders after finishing test.
RA Checking service brake: high- and low-pressure tests
BMW AG - TIS
20.02.2013 07:18
Issue status (12/2007) Valid only until next DVD is issued
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