Remove/install expansion valve

AR83.30-P-5520RT

26.7.07

MODEL 251
with CODE (580) Automatic air conditioning
with CODE (581) Comfort automatic air conditioning

P83.30-4334-06

Shown on engine 113.971

1 Air filter

2 Partition wall between wheelhouse liners

3 Bolts

4 Cable tie

5 Clips

6 Partition wall

8 Nut

9 Bracket

10 High pressure pipe

11 Low pressure pipe

12 Bolts

13 Expansion valve

 	Remove/install
 Danger!	Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
 Danger!	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.	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 areas. Carry out repair work on the air conditioning system circuit only after the system has been discharged.	AS83.00-Z-0001-01A
	Procedure for a damaged or leaky air conditioning system	All models	AH83.30-N-0004-01A
	Protect air conditioning circuit and components from moisture when carrying out repair work	All models with air conditioning	AH83.30-N-0005-01A
	Notes on handling refrigerant R134a	Air conditioning with refrigerant R134a	AH83.30-N-0003-01A
1	Open engine hood and raise to vertical position		AR88.40-P-1000RT
2	Discharge air conditioning system	 Installation: Refill air conditioning and check for proper operation and leaktightness.	AR83.30-P-1760RT
3	Remove partition wall between wheelhouse liners (2)		AR62.30-P-2400RT
4	Remove engine trim panel	Engine 642
5	Remove air filter (1)	Engine 113	AR09.10-P-1150RT
		Engine 272, 273	AR09.10-P-1150GZA
		Engine 642	AR09.10-P-1150RTB
		 On engine 642, the air filter on the left side of the vehicle only must be removed.
6	Separate cable tie (4)
7	Remove bolts (3) from partition wall (6)
8	Unclip partition wall (6) upwards	 Installation: First, clip the clips (5) onto the partition wall in the vehicle and then clip on the removed partition wall (6) from above.
9	Reduce pressure in cooling system	 Carefully open cap on coolant expansion reservoir and then reclose
10	Remove nut (8), push bracket (9) toward the front and remove high pressure line (10) as well as low-pressure line (11) from expansion valve	 Removal: Plug lines and expansion valve with plug
		 Installation: Use new O-rings and moisten with refrigerant compressor oil
			*BA83.30-P-1004-01J
11	Remove bolts (12) and then remove expansion valve (13).	 Installation: Screw in bolts (12) alternately, as otherwise the expansion valve (13) may be tilted on the connection fittings.
		 Installation: If the thread of the bolts (12) does not engage, pull out tapping plate using pulling hook, hold in place and screw in bolts (12). Moisten bolts (12) with refrigerant compressor oil.
			*BA83.30-P-1006-01J
		 Pulling hook	*140589023300
12	Remove sealing rings from connection fittings and seal connection fittings with plugs	 The connecting fitting openings must be sealed, as otherwise penetrating dirt and moisture can damage the components connected to the refrigerant circuit.
13	Install in the reverse order
14	Perform a function test

 Air conditioning

Number	Designation		Model 251


BA83.30-P-1004-01J	Nut, low- and high-pressure lines to expansion valve	Nm	8
BA83.30-P-1006-01J	Bolt, expansion valve to retaining plate	Nm	5

Pulling hook

140 589 02 33 00

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