Test brake system with pressure tester for leaks - AR42.10-P-0015A

MODEL 129, 140, 170, 202, 203, 208, 210, 209.3 /4 

Fig 1: Testing Brake System With Pressure Tester For Leaks - Model 129, 140, 170, 202, 203, 208, 210, 209.3 /4

Courtesy of MERCEDES-BENZ USA

	Check
	Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes.	Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.	AS42.50-Z-0001-01A
	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Notes on handling brake fluid		AH42.50-P-0001-01A
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the lifting platform and position the four support plates below the lifting platform support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
1	Lift/jack up vehicle	AR00.60-P-1000P
2	Remove bleed screw at brake caliper and connect pressure tester (051)	Pressure testers (051) for hydraulic oil systems must not be used for systems with brake fluid otherwise the brake fluid is mixed with mineral oil which can lead to failure of the brake.
		Pressure tester	*WH58.30-Z-1012-15A
3	Bleed pressure tester (051).
4	Switch off easy entry/exit function for driver seat and steering wheel	On vehicles with memory and multifunction steering wheel.
		Otherwise the driver's seat and steering wheel move to a different position, e.g. when the driver door is opened/closed. The seat may be damaged when the brake pedal jack (080) is installed.
		See Operator's Manual
	High-pressure check
5	Produce vacuum for the brake booster	Allow the engine to run at moderate speed and by jerkily releasing the accelerator pedal, produce as high a vacuum as possible.
6	Insert brake pedal jack (080) between the brake pedal and seat	Protect brake pedal and seat against damage.
	Brake pedal winch		Fig 2
		Adapter for brake pedal jack	Fig 3
7	Depress the brake pedal as far as possible with the brake pedal jack (080) and observe the pressure drop	The pressure loss during the test duration of 5 minutes must not exceed 5 % of the regulated value.
	Brake pedal winch		Fig 2
		Adapter for brake pedal jack	Fig 3
	Low-pressure testing
8	Switch off engine and operate brake pedal until vacuum is reduced
9	Turn back brake pedal winch (080) until a line pressure of approx. 3 bar overpressure is still indicated on the pressure gauge	The line pressure must not fall throughout the duration of the test (2 minutes).
	Brake pedal winch		Fig 2
		Adapter for brake pedal jack	Fig 3
10	Disconnect pressure tester (051)		*WH58.30-Z-1012-15A
11	Bleed brake system		AR42.10-P-0010P
		Only bleed the brake caliper to which the pressure tester (051) was connected.
		Bleed screw to brake caliper	*BA42.10-P-1004-10C

FRONT AXLE BRAKE CALIPER

Number	Designation		Model 209 209.377 except with code P98 Black Series	Model 209.377 with code P98 Black Series
BA42.10-P-1004-10C	Bleed screw to front brake caliper	Nm	14	17

Fig 2: Identifying Brake Pedal Winch (000 589 18 31 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Adapter For Brake Pedal Winch (211 589 00 31 00)

Courtesy of MERCEDES-BENZ USA

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1012-15A	Pressure tester (hydraulic single / dual circuit brake systems)