Remove/install refrigerant lines at expansion valve

AR83.30-S-7843EA

Remove/install refrigerant lines at expansion valve

22.08.2019

Model

447 with engine 654

with code HH4 (THERMOTRONIC automatic climate control)

with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

Model

447 with engine 654

with code HH9 (Air conditioner, automatic heater control)

with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

1

Refrigerant line

5

Cover

2

Bracket

6

Air duct segment

3

Washer fluid filler neck

7

Nut

4

Expansion rivet

1

Refrigerant line

11

Screw

1.1

Refrigerant line

12

Refrigerant line

8

Nut

13

Bracket

9

Nut

14

Coolant expansion reservoir

10

Bracket

15

Electrical connector

1

Refrigerant line

18

Nut

1.1

Refrigerant line

19

Nut

1.2

Refrigerant line

20

Sealing rings

16

Bolts

21

Sealing ring

17

Screw

22

Refrigerant line

1.2

Refrigerant line

23

Screw

24

Universal joint

25

Steering gear

 Danger

Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0007-01A

 Warning

Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0006-01A

 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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Move steering gear (25) to center position.

AR46.20-S-0500-01E

 Retainer device

*129589012100

2

Discharge air conditioning system.

Model 447 except code HX1 (R-1234yf refrigerant)

AR83.30-S-1760E

Model 447 with code HX1 (R-1234yf refrigerant)

AR83.30-S-1760EF

3

Remove air/water duct.

AR83.25-S-1410E

4

Remove holder (2).

5

Release washer fluid filler neck (3) from trim (5).

6

Detach expansion rivets (4) and remove trim (5).

7

Release air duct segment (6) in upper area.

8

Remove nut (7).

 Nut, refrigerant line to refrigerant condenser

*BA83.30-N-1019-01A

9

Detach refrigerant line (1) from refrigerant condenser and seal openings with suitable stop plugs.

 Record plug

*129589009100

10

Detach nut (8) and remove refrigerant lines (1, 1.1) with holder (10) from holder (13).

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

11

Detach nut (9).

 Nut, refrigerant line to expansion valve

*BA83.30-N-1001-01A

12

Detach refrigerant lines (1, 1.1) from expansion valve and seal openings with suitable stop plugs.

 Record plug

*129589009100

13

Remove screw (11) .


Counterhold refrigerant lines (1.1, 12) at connecting point using a suitable tool.
Otherwise, damage may occur to the refrigerant lines (1.1, 12).

 Threaded connection, refrigerant line to refrigerant line

*BA83.30-N-1017-01A

14

Detach refrigerant line (12) from connecting point and seal openings with suitable stop plugs.

 Record plug

*129589009100

15

Detach coolant expansion reservoir (14) and place to one side with coolant lines and electrical connector connected.

AR20.30-S-4949EA

16

Release and disconnect electrical connector (15).

17

Remove bolts (16).

18

Remove lower engine compartment paneling.

AR61.20-S-1105E

19

Remove screw (17).

20

Detach nut (18).

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

21

Remove screw (23).

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 Bolt, universal joint to steering gear

*BA46.20-N-1001-01O

22

Detach universal joint (24) from steering gear (25) and place upwards to one side.

23

Detach nut (19).


Counterhold refrigerant lines (1.2, 22) at connecting point using a suitable tool.
Otherwise, damage may occur to the refrigerant lines (1.2, 22).

 Nut, refrigerant line to refrigerant line

*BA83.30-N-1021-01A

24

Detach refrigerant line (1.2) from connecting point and seal openings with suitable stop plugs.

 Record plug

*129589009100

25

Remove refrigerant lines (1, 1.1, 1.2).


Handle refrigerant lines (1, 1.1, 1.2) carefully.
Otherwise, the refrigerant lines (1, 1.1, 1.2) or the adjacent components could be damaged.

26

Replace sealing rings (20, 21) and coat with compressor oil.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

27

Install in the reverse order.



Check

28

Perform function test of brake system.

 Steering gear

Number

Designation

Model 447 with engine 654.9

BA46.20-N-1001-01O

Bolt, universal joint to steering gear

Stage 1

Nm

15

Stage 2

°

180

 Air conditioning

Number

Designation

Model 447 with engine 654

BA83.30-N-1001-01A

Nut, refrigerant line to expansion valve

Nm

14

 Air conditioning

Number

Designation

Model 447 with engine 654

BA83.30-N-1017-01A

Threaded connection, refrigerant line to refrigerant line

Nm

20

 Air conditioning

Number

Designation

Model 447 with engine 654

BA83.30-N-1019-01A

Nut, refrigerant line to refrigerant condenser

Nm

12

 Air conditioning

Number

Designation

Model 447 with engine 654

BA83.30-N-1021-01A

Nut, refrigerant line to refrigerant line

Nm

12