Remove/install refrigerant lines between connecting point on firewall and front connecting point on underbody

AR83.50-S-6842E

Remove/install refrigerant lines between connecting point on firewall and front connecting point on underbody

11.05.2020

Model

447.8 with engine 780.702

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

1.1

Refrigerant line

3

Nut

6

Bracket

1.2

Refrigerant line

4

Nut

7

Bracket

2

Screw

5

Screw

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 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

 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

Notes on battery

AH54.10-P-0001-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

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

 

Remove/install

1

Remove integral carrier.

AR31.35-S-0001G

2

Remove bolt (2).


To do so, counterhold refrigerant line (1.1) at connecting point using a suitable tool.
Otherwise, refrigerant line (1.1) may be damaged.

 Screw, refrigerant line to refrigerant line on underbody

*BA83.50-N-1002-01J

3

Remove nut (3).


To do so, counterhold refrigerant line (1.2) at connecting point using a suitable tool.
Otherwise, refrigerant line (1.2) may be damaged.

 Nut, refrigerant line to refrigerant line on underbody

*BA83.50-N-1001-01J

4

Remove nut (4).


To do so, counterhold refrigerant line (1.2) at connecting point using a suitable tool.
Otherwise, refrigerant line (1.2) may be damaged.

 Nut, refrigerant line to refrigerant line on underbody

*BA83.50-N-1001-01J

5

Remove screw (5).

6

Remove holder (6).

 Installation: Check holder (6) for damage.

 Clip remover

*452589016300

If damage is detected,



Replace holder (6).

7

Remove refrigerant lines (1.1, 1.2) downwards.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A


Handle refrigerant lines (1.1, 1.2) carefully.
Otherwise, refrigerant lines (1.1, 1.2) could be damaged.

 Remove bolt on bracket (7). Plug openings.

 Installation: Replace sealing rings and moisten with compressor oil.
Check holder (7) for damage.

 Record plug

*129589009100

If damage is detected,



Replace holder (7).

8

Install in the reverse order.

 Rear-end air conditioning

Number

Designation

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

BA83.50-N-1001-01J

Nut, refrigerant line to refrigerant line on underbody

Nm

12

 Rear-end air conditioning

Number

Designation

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

BA83.50-N-1002-01J

Screw, refrigerant line to refrigerant line on underbody

Nm

20