Volkswagen Multivan 2010 Service Training page 35

Adjustable steering booster pump
The adjustable steering booster pump is mounted on
the engine below the alternator, and is driven by the
belt drive of the engine. It is used in all T5 2010
vehicles with a diesel engine.
Structure and function
The adjustable steering booster pump operates
●
according to the functional principle of an
adjustable radial piston pump.
The pump has a cam disc, allowing the vanes to
●
be adjusted.
The delivery rate can be varied by the different
●
positions of the vanes.
Input
from
servo oil tank
Control piston
Cam disc
Rotor
Vanes
(11 pieces)
The adjustment enables the pressure of the
●
hydraulic pump to be adapted to the engine
speed, thereby ensuring that the delivery pressure
of the pump remains approximately constant.
Advantage: This avoids any unnecessarily high
●
power consumption by the hydraulic pump. As a
result, fuel consumption is reduced.
Pressurised oil to
steering box
(output)
S453_077
Steering booster pump
S453_114
Stroke adjustment
activation on both sides
Outer ring
35