Remove/install master brake cylinder

AR42.10-D-0300TS

28.08.2020

Model

907, 910

Shown on model 910 with transmission 700.76 and with code MJ8 (ECO start/stop function)

1	Master brake cylinder
2	Feed hose
3	Nut
4	Brake lines
5	Retaining screws
6	Sealing ring
7	Electrical connector

D42.10-1206-05

 Danger	Risk of accident when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work.	Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system.	AS42.50-Z-0002-01A
 Caution	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
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Brake fluid notes		AH42.50-P-0001-01A
Topical note	Notes on working on clutch operating system	Model 907 with transmission 700.790 Model 907 with transmission 711.6 Model 910 with transmission 700.760	AH25.20-N-0003-01TS
Topical note	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
Topical note	Notes on repairs to brake system		AH42.00-P-0003-01A
	Notes on inspecting corrosion on brake lines		AH42.50-Z-0002-01A
 	Remove/install
1	Remove vacuum in brake booster.	 To do this, operate brake pedal several times.
2	Extract brake fluid from brake fluid reservoir.	 Commercially available devices/tools Extraction bellows
		 To do so, open brake fluid reservoir.
3	Remove feed hose (2) from clutch master cylinder.	Model 907 with transmission 700.790, 711.6 Model 910 with transmission 700.76
		 Catch escaping brake fluid using a suitable rag and seal openings.
		 Record plug	*129589009100
4	Detach electrical connector (7).
5	Remove brake fluid reservoir.	When replacing the master brake cylinder (1).
			AR42.10-D-0308TS
6	Detach brake lines (4).
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
		 To do so, remove coupling screws (5). Catch escaping brake fluid using a suitable rag and seal openings.
		 Retaining screw, brake line to master brake cylinder	*BA42.10-N-1004-14TS
		 Box wrench bit	*140589000300
		 Record plug	*129589009100
7	Remove master brake cylinder (1).	 To do so, remove the nuts (3).
		 Installation: Replace compression ring(6).
		 Nut, brake master cylinder to brake booster	*BA42.10-N-1001-05TS
	Check
8	Check brake booster for inner soiling caused by brake fluid.
Topical note	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02A
		If soiling is present,
		
		replace brake booster.
		Model 907	AR43.10-D-0350TSR
		Model 910	AR43.10-D-0350TSF
9	Install in the reverse order.
	Bleeding
10	Bleed brake system.		AR42.10-D-0010TS
		 Model 907 with transmission 700.790, 711.6 Model 910 with transmission 700.760 For these vehicles, bleed clutch operation system as well.

 Master brake cylinder

Number	Designation		Model 907, 910
BA42.10-N-1001-05TS	Nut, brake master cylinder to brake booster	Nm	20

 Brake lines, brake hoses

Number	Designation		Model 907, 910
BA42.10-N-1004-14TS	Retaining screw, brake line to master brake cylinder	Nm	14

140 589 00 03 00

Box wrench bit

129 589 00 91 00

Record plug

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