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High-Pressure Test BMW X3 E83

Disc - x3 1 illustration ~141 words

High-Pressure Test

Note. Perform test on both brake circuits, front and rear.

  1. Unscrew bleeder screw, connect pressure tester and bleed. (Scheme 5)
  2. Load brake pedal with a force of approximately 112 lbs. (500 N), and block pedal with pedal support. Line pressure should be approximately 479 psi (33 bar).
  3. After 2 minutes, pressure must not drop by more than 8 percent.
  4. Perform low-pressure test.

Note. Perform test on both brake circuits, front and rear.

  1. Reset pedal support until line pressure in brake system is equal to 30-72 psi (2-5 bar). Car and measuring equipment must remain perfectly still as vibrations will distort the result.
  2. Pressure should remain constant during five minute test.
  3. Check all rubber parts in case of excessive pressure drop.
  4. Bleed brake calipers and wheel brake cylinders after finishing test. See «BLEEDING BRAKE SYSTEM»(/bmw/x3/e83-2003-2006/remont/mechanical-hydraulic/#disc-x3) .

Scheme 5

Scheme 5
Scheme 5