Checking oil pressure of power steering pump

AR46.30-P-0100RX

Checking oil pressure of power steering pump

31.7.08



Removing



Before opening the hydraulic circuit of the power steering, thoroughly clean the area surrounding the separation point. Even minute particles of dirt, introduced into the hydraulic components, can result in malfunctions or damage to the power steering

1

Remove left engine intake air duct and front engine cover

See: 

Remove/install air filter housing

AR09.10-P-1150RX

2.1

Suction off oil out of power steering expansion reservoir (2)

Vehicles without active body control (ABC)

 Hand pump

*210589007100

2.2

Suction off oil from the tandem pump expansion reservoirs

Vehicles with Active Body Control (code 487) only.

 Hand pump

*210589007100

3

Detach pressure line (1) from power steering pump

 Installation: Install new O-ring.

4

 Mount connection fitting (02) on pressure line (1)



*215589016300

5

 Mount connection hose (02a) on power steering pump



*215589016300

6

 Mount testing unit (01) between  connection fitting (02) and  connecting hose (02a)



*124589062100

7

Fill power steering pump and bleed

Vehicles with Active Body Control (code 487) only.

AR46.30-P-0010N

Vehicles without active body control (ABC)

AR46.30-P-0010B

 Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

8

Start engine and allow it to run at engine speed of approx. 1000 rpm



Checking

9

 Close throttle cock (01a) and check maximum operating pressure

*BE46.30-P-1001-01B

10

Turn off engine

11.1

Suction off oil out of power steering expansion reservoir (2)

Vehicles without active body control (ABC)

 Hand pump

*210589007100

11.2

Suction off oil from the tandem pump expansion reservoirs

Vehicles with Active Body Control (code 487) only.

 Hand pump

*210589007100

12

 Detach testing unit (01)

13

 Detach connection fitting (02)  and connecting hose (02a)



Install

14

Mount pressure line (1) on power steering pump



*BA46.30-P-1009-01S

15

Fill power steering pump and bleed

Vehicles with Active Body Control (code 487) only.

AR46.30-P-0010N

Vehicles without active body control (ABC)

AR46.30-P-0010B

Number

Designation

Model
230

BE46.30-P-1001-01B

Pressure in power steering pump

bar

120...128

Number

Designation

Model
230 with engine 272

Model
230 with engine 273

BA46.30-P-1009-01S

Banjo bolt/union nut high pressure expansion hose (line) to tandem pump/power steering pump

Nm

-

40