Checking braking system for leaks using pressure tester - AR42.10-P-0015GH

MODEL 163.113 /128 /136 /154 /157 /172 /174 /175 

Shown on vehicle with floating caliper 

Fig 1: Identifying Braking System For Leaks Using Pressure Tester

	Inspecting
	Risk of poisoning  from swallowing brake fluid. Risk of injury  from skin and eye contact with brake fluid.	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 brake fluid	All models	AH42.50-P-0001-01A
	Notes if loss of brake fluid is not visible externally	Models 129, 140, 163, 168, 170, 202, 203, 208, 209, 210, 215, 220, 414, 460, 461, 463.200 /204 /206 /207 /208 /209 /220 /221 /224 /225 /227 /228 /230 /231 /232 /233 /240 /241 /244 /245 /247 /248 /249 /250 /254 /300 /304 /307 /308 /309 /320 /321 /322 /323 /324 /325 /327 /328/330/331 /332/333	AH42.10-P-9406-02A
	Notes on repairs to brake system	All models	AH42.00-P-0003-01A
1	Unscrew bleed screw at one floating or fixed caliper and connect pressure tester (051)	Pressure tester	*WH58.30-Z-1012-15A
		Pressure testers for hydraulic oil systems must not be used for systems with brake fluid otherwise the brake fluid will be mixed with mineral oil, which can result in a failure of the brakes.
		After testing, only bleed the floating or fixed caliper to which the pressure tester was connected.
		Floating caliper: front axle bleed screw: ↓
			*BA42.10-P-1002-03A
		Floating caliper: rear axle bleed screw: ↓
			*BA42.10-P-1001-17A
		Fixed caliper: front axle bleed screw: ↓
			*BA42.10-P-1002-02A
		Fixed caliper: rear axle bleed screw: ↓
			*BA42.10-P-1002-01A
2	Bleed pressure tester (051).
	High pressure test
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  as working around the engine during start-up or while running may result in contusions and burns	Secure vehicle to prevent it from moving off by itself. Wear closed and close-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
3	Run engine at moderate speed then create as great a vacuum as possible by suddenly releasing the accelerator pedal
4	Press down brake pedal as far as possible with brake pedal winch (080)	The pressure loss during the test duration of 5 minutes must not exceed 5 % of the regulated value.
		Brake pedal winch	Fig 2
	Low-pressure check
5	Turn off the engine and press the brake pedal until the vacuum is reduced
6	Turn back brake pedal winch (080) until a line pressure of approx. 3 bar is still indicated on the pressure tester	The line pressure must not fall throughout the duration of the test (2 minutes).
		Brake pedal winch	Fig 2
7	Bleed brake system		AR42.10-P-0010GH

Front axle fixed caliper

Number	Designation		Model 163.113 as of VIN A289565, X754620 163.154 as of VIN A289565 except	Model 163.128/ 172/174/ 175	Model 163.128/ except
BA42.10-P-1002-02A	Bleeder screw at fixed caliper of front axle	Nm	18	18	18

Front axle floating caliper

Number	Designation		Model 163.136	Model 163.154/157
BA42.10-P-1002-03A	Bleed screw on front axle floating caliper	Nm	18	18

Front axle floating caliper

Number	Designation		Model 163.113 up to VIN A289564, X754619 163.154 up to VIN A289564 except
BA42.10-P-1002-03A	Bleed screw on front axle floating caliper	Nm	18

Fixed caliper at rear

Rear axle floating caliper

Number	Designation		Model 163.136	Model 163.154/157	Model 163.113 to VIN A289564, X754619 163.154 to VIN A289564
BA42.10-P-1001-17A	Bleed screw at rear axle floating caliper	Nm	18	18	18

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