Remove/install pressure and temperature sensor at expansion valve of heat exchanger

AR08.50-S-8021F

Remove/install pressure and temperature sensor at expansion valve of heat exchanger

18.12.2019

Engine

780.701/702 in model 447

Modification notes

16.12.2019

Commercially available tools added

Operation step 4

1

Pressure and temperature sensor

3

Electrical connector

4

O-ring

5

Expansion valve

 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

 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

 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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

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

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Drain refrigerant circuit.

Engine 780.701 in model 447
except code HX1 (Refrigerant R-1234yf)
Engine 780.701/702 in model 447
with code HX1 (Refrigerant R-1234yf)

AR08.50-S-8001F

2

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

3

Disconnect electrical connector (3).

4

Remove pressure and temperature sensor (1) from the expansion valve (5).

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Seal opening on expansion valve (5).

 Commercially available devices/tools
Socket wrench socket 24 mm

 Installation: Coat O-ring (4) with compressor oil.

 Pressure and temperature sensor to expansion valve for high-voltage battery cooling

*BA08.50-N-1013-02F

 Record plug

*129589009100



Check

5

Check O-ring (4) on the pressure and temperature sensor (1) for damage.

If damage is present,



replace pressure and temperature sensor (1).

6

Install in the reverse order.

 Refrigerant circuit of cooling system

Number

Designation

Model 447 with engine 780.701/702 with code HH9,
Model 447 with engine 780.702 with code HH4

BA08.50-N-1013-02F

Pressure and temperature sensor to expansion valve for high-voltage battery cooling

Nm

10