Remove/install rear refrigerant lines on underbody

AR83.50-S-0003EA

Remove/install rear refrigerant lines on underbody

22.08.2019

Model

447.7/8 with engine 654.9

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

with code XM0 (Facelift)

1

Refrigerant line

6

Screw

1.1

Refrigerant line

7

Refrigerant line

2

Bolts

8

Nut

3

Cover

9

Refrigerant line

4

Screw

10

Screw

5

Bracket

1

Refrigerant line

1.1

Refrigerant line

11

Nut

12

Bracket

13

Bracket

14

Brake hose

15

Bracket

1

Refrigerant line

16

Sealing rings

1.1

Refrigerant line

 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

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

Discharge air conditioning system.

Model 447.7/8 except code HX1 (Refrigerant R-1234yf)

AR83.30-S-1760E

Model 447.7/8 with code HX1 (Refrigerant R-1234yf)

AR83.30-S-1760EF

2

Remove underfloor paneling at left and rear.

AR61.30-S-1001E

3

Detach left rear wheel.

AR40.10-S-1100E

4

Remove screw/bolts (2) .

5

Unclip and remove trim (3).

6

Unscrew screws (4) from holders (5).

7

Release holders (5) using a suitable tool (arrow A) and fold up.

8

Check holders (5) for damage.

If damage is detected,



replace the appropriate holder (5).

9

Remove screw (6).


Counterhold refrigerant lines (1, 7) at connecting point using a suitable tool.
Otherwise, damage may occur to the refrigerant lines (1, 7).

 Screw/bolt, refrigerant line to refrigerant line on underfloor

*BA83.50-N-1002-01J

10

Unscrew nut (8).


Counterhold refrigerant lines (1.1, 9) at connecting point using a suitable tool.
Otherwise, damage may occur to the refrigerant lines (1.1, 9).

11

Release refrigerant lines (1, 1.1) from holders (5) and detach from refrigerant lines (7, 9).

12

Seal openings with suitable stop plug.

 Record plug

*129589009100

13

Remove the bolt (10).

 Screw/bolt, refrigerant line to refrigerant line at left rear

*BA83.50-N-1005-01J

14

Release refrigerant lines (1, 1.1) from underbody and seal openings with suitable stop plugs.

 Record plug

*129589009100

15

Detach nut (11) from holder (12) and release refrigerant line (1) from body.

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

16

Release holder (13) using a suitable tool and fold up.

17

Check holder (13) for damage.

If damage is detected,



Replace holder (13).

18

Unclip brake hose (14) from holder (15).

19

Remove refrigerant lines (1, 1.1) toward rear.


Handle refrigerant lines (1, 1.1) carefully.
Otherwise, damage may occur to the refrigerant lines (1, 1.1).

20

Replace sealing rings (16) and coat with compressor oil.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

21

Install in the reverse order.

 Rear air conditioning

Number

Designation

Model 447.7/8
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

BA83.50-N-1002-01J

Screw/bolt, refrigerant line to refrigerant line on underfloor

Nm

20

 Rear air conditioning

Number

Designation

Model 447.7/8
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

BA83.50-N-1005-01J

Screw/bolt, refrigerant line to refrigerant line at left rear

Nm

12