Drain, evacuate and recharge air conditioning, check for proper operation and check for leaks

AR83.30-S-1760P

31.10.2019

Model

470, 471

Drain, evacuate and recharge air conditioning, check for proper operation and
check for leaks

Shown on engine 699

1	Test and filler connection for high-pressure line
2	Test and filler connection for low-pressure line

S83.30-A072-75

Shown on engine 642

1	Test and filler connection for high-pressure line
2	Test and filler connection for low-pressure line
3	Air duct segment

S83.30-4718-76

 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	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
	Notes on handling refrigerant R134a		AH83.30-N-0003-01A
	Draining
1	Remove air duct segment (3) for battery cooling.	Model 470, 471 with engine 642
2	Unscrew covers from respective filler connection of high-pressure line and low-pressure line.
3	Connect test and filler connection of high-pressure line (1) and test and filler connection of low-pressure line (2) of air conditioning service unit to vehicle.
	000 588 04 82 00 Air conditioning service unit R134a		WS83.00-P-0031B
		 When connecting and when operating the air conditioning service unit, conduct the complete work procedure in accordance with the operator's manual of the manufacturer.
4	Empty air conditioning system using the air conditioning service unit.	 Note down the extracted quantity of compressor oil.
	Check
5	Check refrigerant reservoir for re-usability.	If there is a problem,
		
		Replace the fluid reservoir.
		Model 470, 471 with engine 642	AR83.30-S-6520PS
		Model 470 with engine 200 Model 470, 471 with engine 699	AR83.30-S-6520P
	Evacuate
6	Clean refrigerant with air conditioning service unit and evacuate refrigerant circuit.
7	Conduct vacuum test using air conditioning service unit.	If the air conditioning service unit shows a fault message,
		
		check air conditioning system for leakage.
			AR83.30-S-1761P
	Filling
8	Add new compressor oil to the refrigerant circuit according to the oil filling capacity noted during extraction.
	Compressor oils (specification 362.1)		BB00.40-P-0362-01A
		 Only use the approved compressor oil. If it is proven that a different compressor oil has been used, we will refuse to reimburse costs within the warranty and goodwill period. Daimler AG reserves the right to perform reexaminations.
		 Correct compressor oil in the refrigerant circuit. The refrigerant compressor is damaged if the oil filling quantity is measured incorrectly.
		 If the refrigerant compressor is replaced, do not add any additional oil quantities. Otherwise the air conditioning system experiences malfunctions or becomes damaged.
		 Depending on the repair case, correct oil filling capacity accordingly.
		 Additional filling capacity after replacing system	*BF83.30-N-1003-01P
		 Additional filling quantity after sudden emptying of system (e.g. line ruptured)	*BF83.30-N-1004-01P
		 Additional filling quantity after replacement of condenser	*BF83.30-N-1005-01P
		 Additional filling quantity after replacement of evaporator	*BF83.30-N-1006-01P
		 Additional filling capacity after replacing refrigerant line	*BF83.30-N-1007-01P
		 Additional filling capacity after replacing desiccant cartridge	*BF83.30-N-1008-01P
		 Additional filling capacity after replacing refrigerant compressor (new refrigerant compressor filled beforehand)	*BF83.30-N-1009-01P
		 Additional filling quantity with detectable leakage	*BF83.30-N-1010-01P
9	Fill air conditioning system with air conditioning service unit.
	Refrigerant (specification 361.0)		BB00.40-P-0361-00A
		 Total filling capacity - refrigerant	*BF83.30-N-1001-01P
	Check
10	Conduct pressure test using air conditioning service unit.	If there is a pressure drop during the pressure test,
		
		check air conditioning system for leakage.
			AR83.30-S-1761P
	Remove
11	Disconnect test and filler connection of high-pressure line (1) and test and filler connection of low-pressure line (2) of air conditioning service unit from vehicle.
12	Attach covers to respective filler connection of high-pressure line and low-pressure line.
13	Install air duct segment (3) for battery cooling.	Model 470, 471 with engine 642
	Check
 Warning	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
14	Run engine at idle speed for approx. 4 minutes and check all component functions which are of relevance for proper operation of the air conditioning system.