Remove/install refrigerant compressor

AR83.55-P-5300W

Remove/install refrigerant compressor

02.07.2019

Engine

271, 274, 276 in model 172.4

with code 580 (Air-conditioning system)

Engine

271, 274, 276 in model 172.4

with code 581 (Automatic air conditioning)

Engine

276 in model 207

with code 580 (Air-conditioning system)

Engine

276 in model 207

with code 581 (Automatic air conditioning)

Modification notes

05.10.2016

Safety note added

AS83.00-Z-0006-01A

30.09.2016

Safety note added

AS83.00-Z-0007-01A

30.09.2016

"Technical note" added

AH54.00-P-0001-01A

30.09.2016

General note added

AH83.30-P-0003-02A

Shown on MODEL 172 with ENGINE 271.861

4

Charge air hose

8

Screw

12

Screw

5

Charge air hose

9

Electrical connector

13

Low pressure pipe

6

Screw

10

Screw

14

Radiator

7

Screw

11

High pressure pipe

A9

Refrigerant compressor

 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.Engine 271, 274, 276 in model 172.4
with code 580 (Air-conditioning system)
except code 2U8 (Alternative refrigerant)
Engine 271, 274, 276 in model 172.4
with code 581 (Automatic air conditioning)
except code 2U8 (Alternative refrigerant)
Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

AS83.00-Z-0006-01A

 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.Engine 271, 274, 276 in model 172.4
with code 2U8 (Alternative refrigerant)
with code 580 (Air-conditioning system)
Engine 271, 274, 276 in model 172.4
with code 2U8 (Alternative refrigerant)
with code 581 (Automatic air conditioning)

AS83.00-Z-0007-01A

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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on handling refrigerant R1234yf

Engine 271, 274, 276 in model 172.4
with code 2U8 (Alternative refrigerant)
with code 580 (Air-conditioning system)
Engine 271, 274, 276 in model 172.4
with code 2U8 (Alternative refrigerant)
with code 581 (Automatic air conditioning)

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

Engine 271, 274, 276 in model 172.4
with code 580 (Air-conditioning system)
except code 2U8 (Alternative refrigerant)
Engine 271, 274, 276 in model 172.4
with code 581 (Automatic air conditioning)
except code 2U8 (Alternative refrigerant)
Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

AH83.30-N-0003-01A

 

Remove/install

1

Perform initial startup of refrigerant compressor (A9)

When installing new refrigerant compressor (A9).



AD00.00-P-2000-04A

2

Drain air conditioning system

Engine 271, 274, 276 in model 172.4
with code 580 (Air-conditioning system)
Engine 271, 274, 276 in model 172.4
with code 581 (Automatic air conditioning)

AR83.30-P-1760V

Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

AR83.30-P-1760CW

3

Slacken the poly-V-belt and remove from belt pulley of the refrigerant compressor (A9)

Engine 276 in model 172.4
with code 580 (Air-conditioning system)
Engine 276 in model 172.4
with code 581 (Automatic air conditioning)

AR13.22-P-1202W

Engine 276.9 in model 207
with code 580 (Air-conditioning system)
Engine 276.9 in model 207
with code 581 (Automatic air conditioning)

AR13.20-P-0001FH

Engine 276.8 in model 207
with code 580 (Air-conditioning system)
Engine 276.8 in model 207
with code 581 (Automatic air conditioning)

AR13.20-P-0001ELS

Engine 271 in model 172
with code 580 (Air-conditioning system)
Engine 271 in model 172
with code 581 (Automatic air conditioning)

AR13.20-P-0001CW

Engine 274 in model 172
with code 580 (Air-conditioning system)
Engine 274 in model 172
with code 581 (Automatic air conditioning)

AR13.20-P-0001MR

4

Remove bottom engine compartment paneling at front

Engine 271, 274, 276 in model 172.4
with code 580 (Air-conditioning system)
Engine 271, 274, 276 in model 172.4
with code 581 (Automatic air conditioning)

AR61.20-P-1105W

Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

AR61.20-P-1105EW

5

Remove charge air hoses (4, 5)

Engine 271 in model 172.4
with code 580 (Air-conditioning system)
Engine 271 in model 172.4
with code 581 (Automatic air conditioning)

6

Release and detach electrical connector (9) from refrigerant compressor (A9)

7

Remove screws/bolts (6, 7, 8) from A/C compressor (A9)

 A/C compressor (A9) must be secured against falling down.

 Engine 271 in model 172.4
with code 580 (Air-conditioning system)
Engine 271 in model 172.4
with code 581 (Automatic air conditioning)Bolt, refrigerant compressor to timing case/crankcase/engine support

*BA83.55-P-1003-01G

 Engine 274 in model 172
with code 580 (Air-conditioning system)
Engine 274 in model 172
with code 581 (Automatic air conditioning)
Engine 276 in model 172.4, 207
with code 580 (Air-conditioning system)
Engine 276 in model 172.4, 207
with code 581 (Automatic air conditioning)Screw/bolt, refrigerant compressor to timing case/crankcase/engine support

*BA83.55-P-1001-01M

8

Remove screw (12)

 Engine 271 in model 172.4
with code 580 (Air-conditioning system)
Engine 271 in model 172.4
with code 581 (Automatic air conditioning)Bolt, refrigerant lines to refrigerant compressor

*BA83.55-P-1002-01G

 Engine 274 in model 172
with code 580 (Air-conditioning system)
Engine 274 in model 172
with code 581 (Automatic air conditioning)
Engine 276 in model 172.4, 207
with code 580 (Air-conditioning system)
Engine 276 in model 172.4, 207
with code 581 (Automatic air conditioning)Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1003-01M

9

Remove low-pressure line (13) from A/C compressor (A9)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Sealing ring of low-pressure line (13) must be replaced and moistened with compressor oil.

10

Seal openings of low-pressure line (13) and A/C compressor (A9) using suitable stop plugs


The openings of the low-pressure line (13) and refrigerant compressor (A9) must be sealed.
Otherwise, penetrating dirt and moisture will damage the air conditioning system.

 Record plug

*129589009100

11

Remove screw/bolt (10)

 Engine 271 in model 172.4
with code 580 (Air-conditioning system)
Engine 271 in model 172.4
with code 581 (Automatic air conditioning)Bolt, refrigerant lines to refrigerant compressor

*BA83.55-P-1002-01G

 Engine 274 in model 172
with code 580 (Air-conditioning system)
Engine 274 in model 172
with code 581 (Automatic air conditioning)
Engine 276 in model 172.4, 207
with code 580 (Air-conditioning system)
Engine 276 in model 172.4, 207
with code 581 (Automatic air conditioning)Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1003-01M

12

Remove high-pressure line (11) from A/C compressor (A9)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: The sealing ring of the high-pressure line (11) must be replaced and moistened with compressor oil.

13

Seal openings of high-pressure line (11) and A/C compressor (A9) using suitable stop plugs


The openings of the high-pressure line (11) and of the refrigerant compressor (A9) must be sealed.
Otherwise, penetrating dirt and moisture will damage the air conditioning system.

 Record plug

*129589009100

14

Lift radiator (14), pull towards the front and fasten in place

Engine 271, 276 in model 172.4
with code 580 (Air-conditioning system)
Engine 271, 276 in model 172.4
with code 581 (Automatic air conditioning)
Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

15

Remove refrigerant compressor (A9) upwards out of the engine compartment

16

Install in the reverse order



Check

17

Evacuate air conditioning system, refill it, and then check the system to make sure that it functions correctly and does not leak

Engine 271, 274, 276 in model 172.4
with code 580 (Air-conditioning system)
Engine 271, 274, 276 in model 172.4
with code 581 (Automatic air conditioning)

AR83.30-P-1760V

Engine 276 in model 207
with code 580 (Air-conditioning system)
Engine 276 in model 207
with code 581 (Automatic air conditioning)

AR83.30-P-1760CW

 Refrigerant compressor

Number

Designation

Engine 274

Engine 276

BA83.55-P-1001-01M

Screw/bolt, refrigerant compressor to timing case/crankcase/engine support

Nm

20

20

 Refrigerant compressor

Number

Designation

Engine 271 in model 171, 172, 203, 209, 211, 212

BA83.55-P-1002-01G

Bolt, refrigerant lines to refrigerant compressor

Nm

20

 Refrigerant compressor

Number

Designation

Engine 271 in model 171, 172, 203, 209, 211, 212

BA83.55-P-1003-01G

Bolt, refrigerant compressor to timing case/crankcase/engine support

Nm

20

 Refrigerant compressor

Number

Designation

Engine 274

Engine 276

BA83.55-P-1003-01M

Bolt, refrigerant line to refrigerant compressor

M8

Nm

20

20