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

MODEL 117, 156, 176, 242, 246

MODIFICATION NOTES

28.8.12

Bleed screw at brake caliper

MODEL 176, 246

BA42.10-P-1001-10N

Shown on MODEL 246

Fig 1: Checking Brake System With Pressure Tester For Leaks - Shown On Model 246

Courtesy of MERCEDES-BENZ USA

	Risk of injury due to fan starting unexpectedly	Do not reach into the rotation or hazard area of the fan. Wear closed and close-fitting work clothes.	AS20.40-Z-0001-01A
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid	Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.	AS42.50-Z-0001-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02V
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Check
1	Deactivate easy entry and exit feature for steering wheel	Model 117, 156, 176, 242, 246 with code 275 (Memory package)
2	Clean area surrounding cap on brake fluid reservoir (1)
3	Unscrew cap on brake fluid expansion reservoir (1)
4	Connect filler/bleeder unit to brake fluid expansion reservoir (1)
	000 588 01 82 00 Filling unit		WS25.00-P-0016B
	000 588 01 82 00 Filling unit	Pay attention to manufacturer's operating instructions.	WS25.00-P-0016B
5	Remove the bleed screw on the left front brake caliper (2) and connect pressure tester (3)
	000 588 07 21 00 Test equipment		WS42.00-P-0014B
	000 588 07 21 00 Test equipment	Pressure testers (3) for hydraulic fluid systems must not be used for systems with brake fluid. Otherwise, the brake fluid will be mixed with mineral oil, which can cause brake failure. Pay attention to manufacturer's operating instructions.	WS42.00-P-0014B
6	Bleed pressure tester (3)
7	Switch off filling and bleeding unit and vent pressure
8	Remove fire extinguisher from driver seat	Model 117, 156, 176, 242, 246 with code 682 (Fire extinguisher)
	High-pressure test
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Allow the engine to run at moderate speed and release the accelerator pedal suddenly	In order to produce the highest possible vacuum in the BAS brake booster (A7/7).	AS00.00-Z-0005-01A
10	Immediately press down brake pedal as far as possible and insert brake pedal jack (010) with adapter between brake pedal and driver seat	Cover brake pedal and driver seat in contact area of brake pedal jack and adapter. Otherwise the brake pedal or the front seat may be damaged.
		Adapter for brake pedal winch	Fig 3
		Brake pedal jack	Fig 2
11	Read off brake pressure on high-pressure gauge of pressure tester (3) and note down
12	Read off brake pressure on high-pressure gauge of pressure tester (3) again after 5 min and note down	During the 5 min. duration of the test, the brake pressure may not drop more than 5 %.
	Low-pressure test
13	Switch off engine and remove brake pedal jack (010) with adapter
14	Push down brake pedal several times	In order to reduce the vacuum in the BAS brake booster (A7/7).
15	Press down brake pedal as far as possible and insert brake pedal jack (010) with adapter between brake pedal and driver seat	Cover brake pedal and driver seat in contact area of brake pedal jack and adapter. Otherwise the brake pedal or the front seat may be damaged.
		Adapter for brake pedal winch	Fig 3
		Brake pedal jack	Fig 2
16	Slowly turn back brake pedal jack (010) until the low-pressure gauge on the pressure tester (3) displays a brake pressure of approx. 3 bar
17	Read off brake pressure on low-pressure gauge of pressure tester (3) again after 2 min and note down	The brake pressure must not drop during the 2 min. duration of the test.
18	Remove brake pedal jack (010) and adapter
19	Install fire extinguisher at driver seat	Model 117, 156, 176, 242, 246 with code 682 (Fire extinguisher)
20	Disconnect pressure tester (3) from brake caliper (2) and screw bleed screw all the way into brake caliper (2)
21	Bleed brake system		AR42.10-P-0010-02NKB
		Bleed screw to central clutch release bearing Bleed screw to central clutch operator	*BA25.20-P-1001-01B
		Bleed screw to brake caliper	*BA42.10-P-1002-12J
		Bleed screw on brake caliper	*BA42.10-P-1001-10N
22	Disconnect filler/bleeder unit from brake fluid expansion reservoir (1)	Pay attention to manufacturer's operating instructions.
23	Check brake fluid level, correct if necessary
	Check brake fluid level, correct if necessary		AP42.10-P-4210AK
24	Tighten cap on brake fluid reservoir (1)
25	Activate easy entry/exit feature for the steering wheel	Model 117, 156, 176, 242, 246 with code 275 (Memory package)

CLUTCH OPERATING SYSTEM

Number	Designation		Transmission 711.6 in model 117, 156, 171, 172, 176, 203, 204, 207, 212, 242, 246
BA25.20-P-1001-01B	Bleed screw to central clutch operator	Nm	9

FRONT AXLE BRAKE CALIPER

Number	Designation		Model 117	Model 156
BA42.10-P-1001-10N	Bleed screw on brake caliper	Nm	18	18

FRONT AXLE BRAKE CALIPER

Number	Designation		Model 176, 246	Model 242
BA42.10-P-1001-10N	Bleed screw on brake caliper	Nm	18	18

REAR AXLE BRAKE CALIPER

Number	Designation		Model 117	Model 156
BA42.10-P-1002-12J	Bleed screw to brake caliper	Nm	14	14

REAR AXLE BRAKE CALIPER

Number	Designation		Model 176, 246	Model 242
BA42.10-P-1002-12J	Bleed screw to brake caliper	Nm	14	14

Fig 2: Identifying Brake Pedal Jack (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