Remove/install heat exchanger in engine compartment for auxiliary circuit

AR08.50-D-0302TE

Remove/install heat exchanger in engine compartment for auxiliary circuit

08.01.2020

Engine

780.703 in model 910

1

Heat exchanger

3

Refrigerant line

7

Electrical connector

2

Electrical connector

5

Expansion valve

8

Refrigerant line

1

Heat exchanger

5

Expansion valve

9

Bolts

10

Coolant hoses

 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 injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

 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

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

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

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

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Remove voltage of high-voltage on-board electrical system.

AR47.70-D-1000TE

2

Drain refrigerant circuit.

AR83.30-D-1760TS

3

Drain coolant of auxiliary circuit.

AR08.50-D-0022TE

4

Remove coolant hoses (10) from heat exchanger (1).

AR08.50-P-0018-01EQ

 Capture escaping coolant with a suitable container. Seal connections.

 Set of protective covers

*001589019100

5

Disconnect electrical connectors (2, 7).

6

Remove refrigerant line (3) from the expansion valve (5).

AR83.30-D-7842TE

 Seal refrigerant line (3).

 Record plug

*129589009100

7

Remove refrigerant line (8) from expansion valve (5).

AR83.30-D-7841TE

 Seal refrigerant line (8).

 Record plug

*129589009100

8

Remove screws (9).

 Screw, auxiliary circuit heat exchanger to holder

*BA08.50-N-1003-01TE

9

Remove heat exchanger (1).

 Removal: Remove heat exchanger (1) with attached expansion valve (5).

 The heat exchanger (1) is delivered as a replacement part with expansion valve (5).

10

Install in the reverse order.

 Cooling system

Number

Designation

Engine 780.703 in model 910

BA08.50-N-1003-01TE

Screw, auxiliary circuit heat exchanger to holder

Nm

20