Removing and installing brake system pressure accumulator VX70 — VW

Removing and installing
brake system pressure accumulator
VX70
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Open ring spanner insert, AF 11 mm
V.A.G 1410/6
Universal joint
V.A.G 1410/7
Torque wrench
VAS 6854
Brake pedal depressor
V.A.G 1869/2
Assembly tool
V.A.G 1410/8
Sealing plugs, assembly part no. 5Q0 698 311
1
Sealing plug M10
2
Sealing plug M12
Torque wrench
V.A.G 1410
Tool inserts (11 mm)
V.A.G 1331/2
Brake filling and bleeding equipment
VAS 5234
Sealing plug repair kit
1H0 698 311 A
Fitting locations:
2
Brake servo and brake master cylinder
3
Brake system pressure accumulator
VX70
Removing:
Danger to life due to high voltage
The high-voltage system is under high voltage. If high-voltage components are damaged, there is a risk of severe or fatal injury due to electric shock.
Carry out visual inspection of high-voltage components and cables.
Never use cutting or forming tools, or any others with sharp edges.
Never use heat sources such as welding, soldering, thermal bonding or hot air.
Disconnect battery
Electrical system
Rep. gr.
27
Battery; Disconnecting and reconnecting battery
.
Remove power and control electronics for electric drive
JX1
Electrical system
Rep. gr.
93
.
Remove bracket for power and control electronics for electric drive
JX1
Electrical system
Rep. gr.
93
.
Draw off as much brake fluid as possible from brake fluid reservoir using
brake filling and bleeding equipment
VAS 5234
.
Place sufficient lint-free cloths in the area of the
brake system pressure accumulator
VX70
1
.
Unscrew brake line
1
from
brake system pressure accumulator
VX70
2
.
Seal threaded hole immediately using
sealing plugs
1H0 698 311 A
or sealing plugs with assembly part number 5Q0 698 311.
Fit a dust cap from the bleeder valve onto brake line.
Pull
brake system pressure accumulator
VX70
2
together with bracket
4
and rubber dampers
5
upwards off bracket
6
.
Slightly tilt
brake system pressure accumulator
VX70
. Then, release and pull off connector
3
.
Installing:
Install in reverse order. Note the following when doing this:
Pre-bleed
brake system pressure accumulator
VX70
Chapter
.
Ensure rubber dampers
5
are seated correctly in bracket
4
of
brake system pressure accumulator
VX70
.
Ensure that retaining pins have been fully and evenly inserted into rubber dampers.
Ensure secure seating by pulling.
WARNING
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 firmly seated, otherwise malfunction can occur.
Using
assembly tool
V.A.G 1410/8
, carefully fit brake lines.
Bleed brake system
Chapter
.
Bleed brake system
Chapter
.
Perform basic setting for electromechanical brake servo
Vehicle diagnostic tester
.
Assembly of special tools for tightening brake lines
Specified torques
Chapter
“
Assembly overview –
Brake system pressure accumulator
VX70
”
Electrical system
Rep. gr.
93
Electrical system
Rep. gr.
27
Battery; Disconnecting and connecting battery
.