Remove/install expansion valve - AR83.30-P-5520GQ

MODEL 166

Fig 1: Identifying Expansion Valve Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Drain air conditioning system		AR83.30-P-1760CW
1	Drain air conditioning system	Evacuate air conditioning system, refill it and check it for proper operation and leaktightness.	AR83.30-P-1760CW
2	Remove water collector		AR83.25-P-1402GQ
3	Remove cover (2)
4	Detach intake line (5) and pressure line (4) at expansion valve (1)	The nuts of the lines (4, 5) must not be tightened too tight. Otherwise the expansion valve (1) or the lines (4, 5) may be damaged.
5	Pull suction line (5) and pressure line (4) out of expansion valve (1) and seal
	Compressor oils (specification 362.0)		MB 362.0 compressor oil A 001 989 08 03
	Compressor oils (specification 362.0)	Replace sealing rings of lines (4, 5) and coat with compressor oil.	MB 362.0 compressor oil A 001 989 08 03
6	Remove bolt (3)	Alternately screw in screws/bolts (3). This serves to prevent the expansion valve (1) from tilting.
7	Remove expansion valve (1) and seal connection lines on air conditioner housing
	Compressor oils (specification 362.0)		MB 362.0 compressor oil A 001 989 08 03
	Compressor oils (specification 362.0)	Lift up gasket (6) (arrow). Replace sealing rings of connection lines at air conditioner housing and coat with compressor oil. Moisten thread of screws/bolts (3) with compressor oil.	MB 362.0 compressor oil A 001 989 08 03
8	Install in the reverse order