Remove/install rack-and-pinion steering

AR46.20-P-0600V

Remove/install rack-and-pinion steering

21.10.2015

Model

171

Model

172 with engine 152, 271, 274, 276, 651

Modification notes

19.10.2015

Deactivate memory package, added.

Operation step 1

Shown on model 171

3

Front axle carrier

23n

Retaining plate

30g

Hydraulic line

4

Electrical connector

23q

Oil lines retainer

30i

High pressure pipe

10a

Tie rod joint

24a

Screw

80a

Lower steering shaft

23

Rack-and-pinion steering

24b

Screw

Y10

SPS [PML] solenoid valve

23a

Retaining plate bolts

25

Steering coupling

23g

Rack-and-pinion steering bolts

25a

Bolt, steering joint

Model 172 with engine 276

1

Trim

23

Rack-and-pinion steering

 Danger !

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



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Evaluating steering gear when repairing accident vehicles

AH46.20-P-9409-01A

 

Remove/install

1

Deactivate memory package

Model 171
with code 275 (Memory package)
Model 172 with engine 152, 271, 274, 276, 651
with code 275 (Memory package)

2.1

Remove left engine air intake duct upstream of air filter

Model 171

2.2

Remove front engine cover

Model 172 with engine 276, 651

3

Extract oil from power steering expansion reservoir


Before opening the hydraulic system, the area surrounding the connecting points should be thoroughly cleaned.
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

4

Detach steering coupling (25) from lower steering shaft (80a)

Model 171 with engine 271
Model 172 with engine 271, 274

AR46.10-P-0621V

Model 171 with engine 113, 272
Model 172 with engine 152, 276, 651

AR46.10-P-0621VA

5

Detach wheel-and-tire assembly at the front



AP40.10-P-4050V

6

Remove front diagonal braces

 Installation: The diagonal struts may only be tightened after the vehicle has its wheels on the ground and it is in ready-to-drive condition.

 Self-locking bolt, front diagonal strut to frame floor or front axle carrier

*BA61.10-P-1006-01A

7

Detach electrical connection (4) from SPS solenoid valve (Y10)

Model 171
with code 213 (Direct-Steer system)
Model 172 with engine 152, 271, 274, 276, 651
with code 213 (Direct-Steer system)

8

Remove bolt from retaining plate for oil lines (23q)

 Bolt, oil line retaining plate to rack-and-pinion steering

*BA46.20-P-1001-01F

9

Remove retaining plate for oil lines (23q) from rack-and-pinion steering (23), pull high-pressure line (30i) and hydraulic line (30g) out of rack-and-pinion steering (23) and set aside.

 Seal the connections using suitable  stop plugs.

 Collect escaping oil in suitable container.

 Installation: Replace O-ring of high-pressure line (30i) and support ring and O-ring of hydraulic line (30g).

 Record plug

*129589009100

10.1

Remove bolts (24a, 24b) and remove high-pressure line (30i) and hydraulic line (30g) from rack-and-pinion steering (23)

Model 171

 Bolt, hydraulic line bracket to steering rack

*BA46.20-P-1013-01F

10.2

Remove bolt (24a) and remove hydraulic line (30g) from rack-and-pinion steering (23)

Model 172 with engine 271, 274, 276, 651

 Bolt, bracket for high-pressure line to steering gear (EHPS)

*BA46.30-P-1026-01R

11

Open left and right paneling (1) at the separation point (arrow)

Model 172 with engine 276, 651

12

Press tie rod joints (10a) off steering knuckles

Model 171

AR46.40-P-0200-01V

Model 172

AR46.40-P-0200-02CW

 Self-locking nut, tie rod to steering knuckle

*BA46.40-P-1001-01E

 Puller

*124589033300

 Thrust piece

*140589006300

 Press

*163589034300

 Thrust piece

*171589003400

 Puller

*221589003300

13

Support rack-and-pinion steering (23) and secure to prevent it from falling down

14

Remove bolts for retaining plate (23a) and bolts for rack-and-pinion steering (23g) then remove retaining plate (23n)

 Bolted connection, rack-and-pinion steering to front axle carrier

*BA46.20-P-1002-01F

 Bolted connection, supporting plate to front axle carrier

*BA46.20-P-1004-01F

15

Carefully remove rack-and-pinion steering (23) downwards out of front axle carrier (3)


Carefully remove rack-and-pinion steering (23).
Otherwise, the boots or the SPS solenoid valve (Y10) may be damaged.



Check

16

Check elastomer bearings of rack-and-pinion mounting for damage

Model 171

If necessary



Replace elastomer bearing

AR46.20-P-0600-02V

Antifriction paste, rubber parts 2.5 kg, DBL 6867.00

*BR00.45-Z-1002-06A

17

Check dust cap on primary shaft of rack-and-pinion steering (23) for damage

If necessary



Replace dust cap

AR46.20-P-0004P

18

Install in the reverse order

19

Fill power steering pump and bleed

Model 172 with engine 274
Model 172 with engine 276, 651
as of model year 2016

AR46.30-P-0010RD

Model 171 with engine 113, 271, 272
Model 172 with engine 152, 271
Model 172 with engine 276, 651
up to model year 2016

AR46.30-P-0010V

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

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

AS00.00-Z-0005-01A

20

Check steering with engine running for leaktightness and proper operation

21

Check front axle toe and adjust if necessary

When installing new parts.

Model 171

AR40.20-P-0200V

Model 172

AR40.20-P-0200EW

 Steering gear

Number

Designation

Model 171

Model 172

BA46.20-P-1001-01F

Bolt, oil line retaining plate to rack-and-pinion steering

Nm

18

18

 Steering gear

Number

Designation

Model 171

Model 172

BA46.20-P-1002-01F

Bolted connection, rack-and-pinion steering to front axle carrier

Stage 1

Nm

70

100

Stage 2

°

90

90

 Steering gear

Number

Designation

Model 171

Model 172

BA46.20-P-1004-01F

Bolted connection, supporting plate to front axle carrier

Stage 1

Nm

110

100

Stage 2

°

–

45

 Steering gear

Number

Designation

Model 171

BA46.20-P-1013-01F

Bolt, hydraulic line bracket to steering rack

M6

Nm

10

 Power steering pump

Number

Designation

Model 172 with engine 271, 276, 651

Model 172 with engine 274

BA46.30-P-1026-01R

Bolt, bracket for high-pressure line to steering gear (EHPS)

Nm

10

10

 Tie rod

Number

Designation

Model 171

Model 172

BA46.40-P-1001-01E

Self-locking nut, tie rod to steering knuckle

Stage 1

Nm

50

50

Stage 2

°

60

60

 Frame floor assembly

Number

Designation

Model 171

Model 172

BA61.10-P-1006-01A

Self-locking bolt, front diagonal strut to frame floor or front axle carrier

Nm

60

60

Repair materials

Number

Designation

Order number

BR00.45-Z-1002-06A

Antifriction paste, rubber parts 2.5 kg, DBL 6867.00

A 000 989 01 60