Attention:
- Testing with excess pressure and vacuum (leak test) must be carried out with the engine off.
- Observe safety precautions when lifting a vehicle.
1. Perform an overpressure test (leak test).
Note: Check both brake circuits:
- 1. Contour of the front wheel brake mechanisms.
- 2. Contour of the rear wheel brake mechanisms.
1) Loosen the air bleed screw, connect the test pressure gauge and bleed the air.
2) Apply force to the brake pedal, see Technical Specifications, and secure the pedal using the stop.
After 2 minutes, the pressure should drop by no more than 8%.
2. Perform a vacuum test:
Note: Performed on both brake circuits.
1) Move the stop back until the test pressure in the brake system is 2-5 bar.
2) Make sure that the vehicle and the measuring device are motionless, as any shaking will distort the measurement results.
3) During the 5-minute test, the pressure value should not change.
4) If the pressure drops significantly, check all rubber parts.
5) After completing the check, bleed the calipers or wheel brake cylinders.
(The original text can be read on the website: BMWMAN.RU)