Remove/Install Refrigerant Compressor - AR83.55-P-5300GQ

Engine 157, 276, 278, 642 in Model 292 

Engine 157, 276, 278, 642, 651 in Model 166 

Shown on Model 166.057 

Fig 1: Refrigerant Compressor Components Location - Engine 157, 276, 278, 642 In Model 166 (Shown On Model 166.057)

Courtesy of MERCEDES-BENZ USA

	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 rep Air work on the Air conditioning system circuit only after the system has been evacuated. Engine 157, 276, 278, 642 in Model 292 except code 2U8 (Alternative refrigerant) Engine 157, 276, 278, 642, 651 in Model 166 except code 2U8 (Alternative refrigerant)	AS83.00-Z-0006-01A
	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 rep Air work on the Air conditioning system circuit only after the system has been evacuated. Engine 157, 276, 278, 642 in Model 292 with code 2U8 (Alternative refrigerant) Engine 157, 276, 278, 642, 651 in Model 166 with code 2U8 (Alternative refrigerant)	AS83.00-Z-0007-01A
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on handling refrigerant R134a	Engine 157, 276, 278, 642 in Model 292 except code 2U8 (Alternative refrigerant) Engine 157, 276, 278, 642, 651 in Model 166 except code 2U8 (Alternative refrigerant)	AH83.30-N-0003-01A
	Notes on handling refrigerant R1234yf	Engine 157, 276, 278, 642 in Model 292 with code 2U8 (Alternative refrigerant) Engine 157, 276, 278, 642, 651 in Model 166 with code 2U8 (Alternative refrigerant)	AH83.30-P-0003-02A
	Remove
1	Perform initial startup of refrigerant compressor (A9)	When installing new refrigerant compressor (A9).
			AD00.00-P-2000-04A
2	Drain Air conditioning system		AR83.30-P-1760CW
3	Switch off ignition and store transmitter key outside of transmission range (min. 2 m)
4	Remove upper engine cover
5	Slacken poly-V-belt and remove	Engine 276.9 in Model 166	AR13.20-P-0001GQ
		Engine 642 in Model 166, 292	AR13.20-P-0001OGR
		Engine 651 in Model 166	AR13.20-P-0001GQA
6	Remove hydraulic pump from active roll stabilization	Engine 157, 276, 278, 642 in Model 166, 292 with code 468 (ACTIVE CURVE SYSTEM)
		Engine 276, 642 in Model 166, 292 with code 468 (ACTIVE CURVE SYSTEM)	AR32.34-P-0030GQ
		Engine 157, 278 in Model 166, 292 with code 468 (ACTIVE CURVE SYSTEM)	AR32.34-P-0030MLJ
7	Release and detach electrical connector (1) from refrigerant compressor (A9)
8	Clean and dry surroundings of connection fittings for lines (3) at refrigerant compressor (A9)
9	Detach refrigerant lines (3) from refrigerant compressor (A9)
10	Seal openings of refrigerant lines (3) and on refrigerant compressor (A9) using suitable stop plugs	The openings of the refrigerant lines (3) and refrigerant compressor (A9) must be sealed. Otherwise penetrating dirt and moisture will damage the components that are connected to the refrigerant circuit.
		Record plug	Fig 2
11	Remove lower Screw/bolt (4) and place ground line (5) to one side
12	Remove upper and side Screw/bolt (4)
13	Remove A/C compressor (A9)
	Install
14	Insert refrigerant compressor (A9) and position upper and side Screw/bolt (4)
15	Position lower Screw/bolt (4) with ground line (5)
16	Tighten refrigerant compressor (A9) with Screws/bolts (4)	Engine 157, 276, 278 in Model 166, 292 Screw/bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
		Engine 642 in Model 166, 292 Screw/bolt at A/C compressor	*BA83.55-P-1005-01A
		Engine 651 in Model 166Bolt, A/C compressor to major assembly carrier	*BA83.55-P-1001-01W
		Engine 651 in Model 166Bolt, A/C compressor to engine support	*BA83.55-P-1002-01W
17	Remove stop plug	Record plug	Fig 2
18	Replace sealing rings and moisten with compressor oil
			BB00.40-P-0362-00A
19	Screw refrigerant lines (3) onto refrigerant compressor (A9)	Engine 157, 276, 278 in Model 166, 292Bolt, refrigerant line to refrigerant compressor	*BA83.55-P-1003-01M
		Engine 642 in Model 166, 292 Screw/bolt, refrigerant lines to A/C compressor	*BA83.55-P-1002-01A
		Engine 651 in Model 166Refrigerant line to refrigerant compressor	*BA83.55-P-1003-01W
20	Connect and lock electrical connector (1) at refrigerant compressor (A9)
21	Install Active Roll Stabilization hydraulic pump	Engine 157, 276, 278, 642 in Model 166, 292
		Engine 276, 642 in Model 166, 292 with code 468 (ACTIVE CURVE SYSTEM)	AR32.34-P-0030GQ
		Engine 157, 278 in Model 166, 292 with code 468 (ACTIVE CURVE SYSTEM)	AR32.34-P-0030MLJ
22	Pull on poly-V-belt and tension	Engine 276.9 in Model 166	AR13.20-P-0001GQ
		Engine 642 in Model 166, 292	AR13.20-P-0001OGR
		Engine 651 in Model 166	AR13.20-P-0001GQA
23	Install upper engine cover
	Check
24	Evacuate the Air conditioning system, refill it, and then check the system to make sure that it functions correctly and does not leak		AR83.30-P-1760CW

Fig 2: Identifying Set Of Sealing Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA