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Home >> Mercedes Benz >> 2019 >> Sprinter 3500XD 2D Cab Chassis >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Description & Operation, Gen Info, Basic Knowledge, Safety, Testing, Maintenance, R&I >> Testing & Repair >> Remove/Install Master Brake Cylinder - Ar42.10-D-0300TS

Remove/Install Master Brake Cylinder - Ar42.10-D-0300TS

Model 907 

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  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 
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Brake fluid notes   AH42.50-P-0001-01A 
  Notes on working on clutch operating system Model 907 AH25.20-N-0003-01TS
  Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
  Notes on repairs to brake system   AH42.00-P-0003-01A 
  Notes on inspecting corrosion on brake lines   AH42.50-Z-0002-01A 
REMOVINGINSTALLING Remove/install     
1 Remove vacuum in brake booster. IMPORTANT To do this, operate brake pedal several times.  
2 Extract brake fluid from brake fluid reservoir. IMPORTANTCommercially available devices/tools 
Extraction bellows
IMPORTANT To do so, open brake fluid reservoir.
 
3 Remove feed hose (2) from clutch master cylinder. Model 907
IMPORTANT Catch escaping brake fluid using a suitable rag and seal openings.
SPECIAL TOOL Record plug
Fig 2
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
IMPORTANT To do so, remove coupling screws (5).
Catch escaping brake fluid using a suitable rag and seal openings.
AH00.00-P-0015-01CW
    TORQUE SPECIFICATION Retaining screw, brake line to master brake cylinder *BA42.10-N-1004-14TS 
    SPECIAL TOOL Box wrench bit Fig 1
    SPECIAL TOOL Record plug Fig 2
7 Remove master brake cylinder (1). IMPORTANT To do so, remove the nuts (3).
IMPORTANTInstallation  : Replace compression ring (6).
TORQUE SPECIFICATION Nut, brake master cylinder to brake booster
*BA42.10-N-1001-05TS 
INSPECT Check     
8 Check brake booster for inner soiling caused by brake fluid.
Notes on externally invisible brake fluid loss
If soiling is present,

replace brake booster.
AH42.10-P-9406-02A 
    Model 907 AR43.10-D-0350TSR
      AR43.10-D-0350TSF
9 Install in the reverse order.    
  Bleeding     
10 Bleed brake system. IMPORTANT Model 907 AR42.10-D-0010TS 
TORQUE SPECIFICATION MASTER BRAKE CYLINDER

Number Designation Model 907
BA42.10-N-1001-05TS Nut, brake master cylinder to brake booster Nm 20
TORQUE SPECIFICATION BRAKE LINES, BRAKE HOSES

Number Designation Model 907
BA42.10-N-1004-14TS Retaining screw, brake line to master brake cylinder Nm 14
Fig 1: Box Wrench Bit (140 589 00 03 00)
G13787455
Fig 2: Record Plug (129 589 00 91 00)
G13787456