Remove/install power steering pump

AR46.30-P-0500RG

Remove/install power steering pump

03.07.2020

Model

190

Modification notes

02.07.2020

Bolt, high-pressure line to holder on front axle carrier

Operation step 6.

02.07.2020

Bolt, low-temperature circuit pump bracket to front axle carrier

Operation step 7.

02.07.2020

Assembly tool inserted.

Operation step 10.

02.07.2020

Hose clamp pliers inserted.

Operation step 11.

02.07.2020

Check toothing on power-steering pump (1) and refrigerant compressor.

Operation step 14.

02.07.2020

Remove filter for steering gear oil.

Operation step 15.

1

Power steering pump

8

Bolts

2

V-belt

9

Cover panel

3

Belt tensioner

10

Screw

4

Screw

11

Screw

5

Pressure line

12

Pressure line

6

Screw

13

Line

7

Bracket

1

Power steering pump

14

Screw

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

 Warning

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of mechanical components when moving components.

AS00.00-Z-0009-01A

 Warning

Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on working in engine compartment

AH60.00-P-0042-01RG

 

Remove/install

1

Remove lower engine compartment paneling.

AR61.20-P-1105RG

2

Open engine hood and position upright.

AR88.40-P-1000RG

3

Remove engine cover.

4

Suction off oil from expansion reservoir of the power steering system.


Thoroughly clean area around expansion reservoir before opening hydraulic system.
Otherwise even the smallest dirt particles, introduced into the hydraulic system, can lead to malfunctions and total failure of the hydraulic system.

 Hand pump

*210589007100

5

Slacken V-belt (2) on belt tensioner (3) and place to one side.

6

Remove screw (4) and release pressure line (5).

 Bolt, high-pressure line to holder on front axle carrier

*BA46.30-P-1003-01E

7

Unscrew screws (6) of holder (7) and remove holder (7).

 Bolt, low-temperature circuit pump bracket to front axle carrier

*BA20.10-P-1008-01ZA

8

Unscrew screws (8) and remove cover panel (9).

If screws (8) and cover panel (9) are installed.

 M61

*BA00.10-P-1002-04A

9

Remove the bolt (10).

 Bolt, high-pressure line to pump bracket

*BA46.30-P-1002-01E

10

Unscrew screw (11), pull pressure line (12) out of power-steering pump (1) and seal openings with suitable stop plugs.


Thoroughly clean area around separating point before opening hydraulic system.
Otherwise even the smallest dirt particles, introduced into the hydraulic system, can lead to malfunctions and total failure of the hydraulic system.

 Installation: Replace seal.

 Collect escaping oil using a rag.

 Bolt, high-pressure line to power steering pump

*BA46.30-P-1005-01E

 Assembly tool

*000589936300

 Record plug

*129589009100

11

Remove line (13) from power-steering pump (1) and seal openings with suitable stop plugs.


Thoroughly clean area around separating point before opening hydraulic system.
Otherwise even the smallest dirt particles, introduced into the hydraulic system, can lead to malfunctions and total failure of the hydraulic system.

 Collect escaping oil using a rag.

 Hose clamp pliers

*003589033700

 Record plug

*129589009100

12

Remove screws (14).

 Bolt, power steering pump to bracket

*BA46.30-P-1001-01E

13

Remove power-steering pump (1).



Check

14

Check toothing (arrows) on power-steering pump (1) and on refrigerant compressor.

If damage is found,



Replace power-steering pump (1) or refrigerant compressor.

AR83.55-P-5310RG

15

Remove filter for steering gear oil.

Model 190
with code M032 (Black Series version)
When replacing the power-steering pump (1).



AP46.25-P-0100A

 Installation: Replace filter for steering gear oil.

16

Install in the reverse order.



Check

17

Fill and bleed power-steering pump (1).

AR46.30-P-0010RG

18

Check oil level in expansion reservoir; correct if necessary.



AP46.00-P-4612A

 Metric screws/bolts and nuts as per MBN 10 105, 10 143

Number

Designation

8.8

10.9

BA00.10-P-1002-04A

M61

Nm

9

13

 Coolant pump, coolant thermostat

Number

Designation

Engine 178

BA20.10-P-1008-01ZA

Bolt, low-temperature circuit pump bracket to front axle carrier

M6

Nm

-

M8

Nm

9

 Power steering pump

Number

Designation

Model 190

BA46.30-P-1001-01E

Bolt, power steering pump to bracket

Nm

20

 Power steering pump

Number

Designation

Model 190

BA46.30-P-1002-01E

Bolt, high-pressure line to pump bracket

Nm

7

 Power steering pump

Number

Designation

Model 190

BA46.30-P-1003-01E

Bolt, high-pressure line to holder on front axle carrier

Nm

8

 Power steering pump

Number

Designation

Model 190

BA46.30-P-1005-01E

Bolt, high-pressure line to power steering pump

M6

Nm

8

M8

Nm

18