Remove/install refrigerant compressor

AR83.55-T-5300AA

Remove/install refrigerant compressor

06.06.2019

Model

NMB671.015/020/021/030/042 with engine 457.942

with code HKA (Konvekta ACX 602 air conditioning with roof heater)

1

Bracket of tensioner pulley

2

Carrier

3

Refrigerant compressor

4

Magnetic clutch electrical connector

5

High-pressure switch electrical connector

7

Plug

10

High-pressure connection

Pfeil

High-pressure connection stopcock

6

Low-pressure switch electrical connector

8

Plug

9

Low-pressure connection

Pfeil

Low-pressure connection stopcock

 

Remove/install

 Danger

Risk of explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant.

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 areas. Carry out repair work on the air conditioning system circuit only after the system has been drained.

AS83.00-Z-0001-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

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

1

Open liftgate, fold down bumper cover

2

Remove poly-V-belt of air conditioning refrigerant compressor

AR13.21-T-1203AA

3

Detach tensioner pulley bracket (1) from carrier (2) and refrigerant compressor (3)

4

Disconnect magnetic clutch electrical connector (4) and expose electrical line

5

Disconnect high-pressure switch electrical connector (5) and low-pressure switch electrical connector (6)

 Depending on the version involved, the electrical high-pressure switch and the electrical low-pressure switch are located in the area of the cap (7).

6

Unscrew caps (7, 8) over stopcocks (arrows)

7

Drain air conditioning system

AR83.30-T-1780AA

8

Close stopcocks (arrows) of low-pressure and high-pressure connections (9, 10)

 The stopcocks (arrows) are located under the caps (7, 8).

 Closing the stopcocks (arrows) ensures that moisture does not enter the cooling circuit.

9

Detach low-pressure connection (9) from refrigerant compressor (3)

 Installation: Replace seal.

 Bolt of high and low pressure connection to refrigerant compressor

*BA83.55-N-1005-01G

10

Detach high-pressure connection (10) from refrigerant compressor (3)

 Installation: Replace seal.

 Bolt of high and low pressure connection to refrigerant compressor

*BA83.55-N-1005-01G

11

Raise vehicle

AR00.60-T-1000AA

12

Remove engine compartment lining below engine

AR61.20-T-1105AA

13

Detach refrigerant compressor (3) from carrier (2) and remove upwards

 Bolt, refrigerant compressor to carrier

*BA83.55-N-1001-01G

14

Install in the reverse order

15

Fill air conditioning system

Model 671.015/020/021/030/042 with engine 457.942 with code HKA (Konvekta ACX 602 A/C with roof heater)

AR83.30-T-1777AA

 Refrigerant compressor

Number

Designation

ENGINE 457.942 in MODEL 671.015/020/021/030/042 with CODE HKA

BA83.55-N-1001-01G

Bolt, refrigerant compressor to carrier

Nm

80

 Refrigerant compressor

Number

Designation

ENGINE 457.942 in MODEL 671.015/020/021/030/042 with CODE HKA

BA83.55-N-1005-01G

Bolt of high and low pressure connection to refrigerant compressor

M10

Nm

60

M12

Nm

90