Removing and installing expansion valve - AR83.30-P-5520G

MODEL 170 with CODE (580) Air conditioning or, for USA, Tempmatic with CODE (581a) Automatic air conditioning 

Fig 1: Identifying Expansion Valve Remove/Install Components - Model 170 With Code (580)

	Removal, installation
	Explosion hazard  when performing welding or brazing work on closed air conditioning. Poisoning hazard  from inhaling overheated refrigerant vapors. Injury hazard  from eye or skin contact with liquid refrigerant	Never perform welding or brazing work on the closed air conditioning system or in its vicinity. Smoking and open flame is prohibited. Wear protective goggles and protective gloves, work only in well ventilated rooms. Perform repair work on air conditioning circuit only if system is discharged.	AS83.00-Z-0001-01A
	Action to be taken in the event air conditioning is damaged or leaks		AH83.30-N-0004-01A
	Protect air conditioning circuit and components from moisture during repair work	All models with air conditioning	AH83.30-N-0005-01A
	Notes on handling R134a refrigerant	All models with R134a refrigerant	AH83.30-N-0003-01A
1	Drain air conditioning (recycle), evacuate, charge, check for leakage	Add quantity of compressor oil evacuated to refrigeration circuit when charging air conditioning
2	Unscrew hex. nut (1)		*BA83.30-P-1001-01A
3	Pull off pressure lines	Plug openings (parts kit), replace O-rings (4) (moisten with compressor oil)
4	Unscrew screws (3) (2x)		*BA83.30-P-1002-01A
5	Pull expansion valve (5) off of pressure lines (7)	Plug openings (parts kit), replace O-rings (4) (moisten with compressor oil)
		Installation:  Tighten screws alternately to avoid canting
6	Reinstall in opposite order
7	Replace receiver/drier		AR83.30-P-6520G
8	Switch on air conditioning and allow it to idle for approx. 4 minutes	Set temperature dials blue Blower to max.
9	Check air conditioning for proper function	Air outlet temperature at center nozzle should not drop below +5 ° C, if necessary ↓ Perform diagnosis according to Diagnosis Manual
10	Find leaky point in air conditioning circuit		*WE58.40-Z-1002-20A

AIR CONDITIONING