1 Series E81 130i (N52K) 3-door
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.
Observe safety instructions on raising the vehicle.
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
22.01.2013 05:51
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 1 -
