Checking check valve - AR43.10-P-0023A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

MODELS 129, 140, 170, 202, 208, 210

Fig 1: Identifying Tester Connected At Brake Booster Vacuum Line & Measurement Connection

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Checking
1	Operate brake pedal several times until vacuum in brake booster is reduced
2	Connect tester (030) to brake booster		AR43.10-P-0024-01A
		Vacuum tester	Fig 2
		Test connector, for brake boosters with plug connection	Fig 3
	Test connector for testing the check valve or brake booster	For brake boosters with screw connection	WF58.50-P-4310-01A
			*BA43.10-P-1001-01A
3	Start engine and create a vacuum of 0.75 - 0.80 bar by accelerating and then suddenly releasing the accelerator pedal	Reduce vacuum >0.8 bar by depressing the brake pedal.
4	Switch off engine	Vacuum must not drop by more than 0.2 bar within 30 seconds.
		Vacuum drop > 0.2 bar: replace vacuum line, if necessary: ↓
		Check brake booster	AR43.10-P-0325A
5	Disconnect tester (030) from brake booster

PNEUMATIC BRAKE BOOSTER

Number	Designation		Model 129 up to 09/89	Model 129 as of 10/89	Model 140	Model 202
BA43.10-P-1001-01A	Vacuum line to brake booster	Nm	30	30	30	30

PNEUMATIC BRAKE BOOSTER

Number	Designation		Model 210
BA43.10-P-1001-01A	Vacuum line to brake booster	Nm	30

Fig 2: Identifying Vacuum Tester (201 589 13 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Test Connector (168 589 08 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.