Remove/install refrigerant compressor - AR83.55-P-5300MEV

ENGINE 780.009 in MODEL 451.391/491 

Fig 1: Identifying Refrigerant Compressor Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Refrigerant Compressor Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	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.	Do not 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
	Risk of death  when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who wear electronic implants (e.g. cardiac pacemakers), must not carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-N-0005-01A
	Procedure for a damaged or leaky air conditioning system		AH83.30-N-0004-01A
	Note on high-voltage on-board electrical system		AH54.00-P-0010-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on handling refrigerant R134a		AH83.30-N-0003-01A
	Remove/install
1	Drain air conditioning system	Evacuate air conditioning and then fill it.	AR83.30-P-1760MCC
2	Disconnect air conditioning service unit
	000 588 04 82 00 Air conditioning service unit		WS83.00-P-0031B
3	Remove vehicle key and mains plug
4	Perform disable for the high-voltage on-board electrical system	After completing the work, attach initial startup event log together with the power disable event log to the vehicle file.	AR54.10-P-1160MEV
5	Remove external socket of communications control unit	If installed in vehicle.	AR54.10-P-5108MEV
6	Remove bolts (1)
7	Remove battery charger for high-voltage battery		AR54.10-P-5106MEV
8	Release and disconnect refrigerant compressor control unit connector (EAC) (N116/1x1)
9	Remove screws/bolts (5) and swivel bracket (4) forwards
10	Release retainer (6) at refrigerant compressor high-voltage connector (EAC) (N116/1x2) by pressing in
11	Release and disconnect refrigerant compressor high-voltage connector (EAC) (N116/1x2) at catch hook (7) using a suitable tool, as shown	A feeler gauge can be used to release this, for example.
12	Cover plug and connector of refrigerant compressor high-voltage connectors (EAC) (N116/1x2) with protective covers	Set of protective covers	Figure
13	Unscrew nuts (8, 10)	Nut, refrigerant line to refrigerant compressor	*BA83.55-P-1005-01V
14	Remove refrigerant lines (2, 3) at refrigerant compressor (A9), place to one side and remove sealing rings of refrigerant lines (2, 3)
	Compressor oils (specification 362.0)	Close off refrigerant lines (2, 3) and refrigerant compressor (A9) with suitable stop plugs. Otherwise, penetrating dirt and moisture will damage components that are connected to the refrigerant circuit. Replace sealing rings at refrigerant lines (2, 3) and moisten with compressor oil when inserting.	MB 362.0 compressor oil A 001 989 08 03
15	Remove screws/bolts (9, 11)	Bolt, refrigerant compressor to engine	*BA83.55-P-1004-01V
16	Remove screw/bolt (12) and remove refrigerant compressor (A9) with screw/bolt (12) toward bottom right	The screw/bolt (12) remains in the refrigerant compressor (A9) during removal for reasons of accessibility. Before inserting the refrigerant compressor (A9), ensure that screw/bolt (12) is inserted in the corresponding hole at the refrigerant compressor (A9).
		Bolt, refrigerant compressor to engine	*BA83.55-P-1004-01V
17	Remove filter dryer	Always replace the filter drier after opening the refrigerant circuit.	AR83.30-P-6525MCC
18	Install in the reverse order

REFRIGERANT COMPRESSOR

Number	Designation			Engine 780.009
BA83.55-P-1004-01V	Bolt, refrigerant compressor to engine	M8	Nm	20
		M10	Nm	40

REFRIGERANT COMPRESSOR

Number	Designation		Engine 780.009
BA83.55-P-1005-01V	Nut, refrigerant line to refrigerant compressor	Nm	20

Fig 3: Identifying Set Of Protective Covers (001 589 01 91 00)

Courtesy of MERCEDES-BENZ USA