CL 55 AMG (215.373) V8-5.5L (113.982) (2001)
Vacuum Brake Booster: Testing and Inspection
Check Brake Booster
Modification Notes
Inspect
1
Operate brake pedal several times until vacuum in brake booster (16) is reduced
2
Connect tester (030) at brake booster
NOTE: Measurement connection (031) for checking the check valve (17) or brake booster (16).
3
Connect pressure tester (051) with connection fitting to brake caliper
NOTE: After testing, only bleed the brake caliper to which the pressure tester was connected.
4
Connect pedal force measuring instrument (060) at brake pedal
5
Start engine and create a vacuum of 0.75 to 0.80 bar by accelerating and then suddenly releasing the accelerator pedal
NOTE:
-
If the vacuum is considerably lower or if the vacuum drops immediately, the O-ring between the brake booster and master brake cylinder may
be damaged or the non-return valve in the vacuum line may be defective, checking non-return valve
-
Remove/Install master brake cylinder, replace O-ring
6
Apply specified force to brake pedal and read off line pressure.
-
To cover measurement errors as far as possible (wrong force on brake pedal, wrong vacuum) and measurement scatter of the gauges, a
tolerance of ±10 bar on the specified value is permissible.
NOTE: The measured value must be within the value range.
7
Disconnect tester (030) at brake booster
8
Disconnect pressure tester (051) with connection fitting from brake caliper
9
Remove pedal force measuring instrument (060) at brake pedal
10
Bleed brake system.