VW Golf manuals

Volkswagen Golf Service & Repair Manual: Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Volkswagen Golf Service & Repair Manual / Brake system (hybrid) / Brakes, hydraulics, regulator, servo / Brake servo and brake master cylinder / Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Special tools and workshop equipment required
   
Torque wrench -V.A.G 1331-
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Torque wrench -V.A.G 1410-
Tool inserts (11 mm) -V.A.G 1331/2-
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Brake filling and bleeding equipment -VAS 5234-
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Sealing plug repair kit -1H0 698 311 A-
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Sealing plug -5Q0 698 311-
1 -  Sealing plug M10
2 -  Sealing plug M12
Location:
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

The brake system pressure accumulator -VX70- is located on left-hand side of the engine compartment.
1 -  Brake servo and brake master cylinder
2 -  Brake system pressure accumulator -VX70-
3 -  ABS control unit -J104- with ABS hydraulic unit -N55-
Removing:
–  Observe safety precautions when working in the area of high-voltage components → Chapter.
–  Observe the risk classification of the high-voltage system → Electric drive; Rep. gr.00.
Danger to life due to high voltage.Risk of severe or fatal injury due to electric shock.The high-voltage system must be de-energised by a suitably qualified technician.
–  De-energise high-voltage system now → Electric drive; Rep. gr.93.
–  Disconnect battery → Electrical system; Rep. gr.27.
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

–  Disconnect connector -3-.
–  Release hose clip -1- and remove coolant hose.
–  Remove coolant expansion tank from bracket. To do this, release catch -2- with a thin screwdriver.
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

–  Unscrew nut -2- and remove bracket -1-.
–  Move coolant hoses and electrical wiring away from the area of the brake system pressure accumulator -VX70-.
–  Draw off as much brake fluid as possible from brake fluid reservoir using brake filling and bleeding equipment -VAS 5234-.
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

–  Place sufficient lint-free cloths in the area of the brake system pressure accumulator -VX70--1-.
–  Unscrew brake lines -2- from brake system pressure accumulator -VX70--1-.
–  To do this, unscrew union nuts -3-.
–  Seal threaded hole immediately using sealing plugs -1H0 698 311 A- or sealing plugs -5Q0 698 311-.
–  Fit dust caps from the brake caliper bleeder valves onto brake lines.
–  Release and pull off connector -4-.
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

–  Pull brake system pressure accumulator -VX70--1- together with bracket -3- and rubber dampers -2- upwards off bracket.
Installing:
Install in reverse order. Note the following points:
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

–  Ensure rubber dampers are seated correctly in bracket of brake system pressure accumulator -VX70-.
–  Ensure that retaining pins have been fully and evenly inserted into rubber dampers.
–  Ensure secure seating by pulling.
Ensure that rubber dampers of retainer are not pressed out of bracket when installing. After installation, check that the brake system pressure accumulator -VX70- is securely seated, otherwise malfunction can occur.
–  Bleed brake system → Chapter.
–  Subsequently bleeding the brake system → Chapter.
–  Perform basic setting for electromechanical brake servo → Vehicle diagnostic tester.
Specified torques
→ Chapter „Assembly overview – Brake system pressure accumulator -VX70-, LHD vehicles“
→ Electrical system; Rep. gr.27.
 

Removing and installing brake system pressure accumulator -VX70-, RHD vehicles

Removing and installing brake system pressure accumulator -VX70-, LHD vehicles
Special tools and workshop equipment required     Torque wrench -V.A.G 1331-   ...

Removing and installing brake servo, LHD vehicles
Special tools and workshop equipment required     Torque wrench -V.A.G 1331-   ...

Other materials:

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Observe the safety precautions for vehicles with a Start/Stop system → Chapter. The following abort conditions deactivate the start-stop-function: The Start/Stop system has been switched off via th ...

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