Compressor HVAC: Service and Repair

AR83.55-P-5300Q Remove/Install Refrigerant Compressor
- with CODE (580a) Automatic air conditioning
- with CODE (581b) Convenience automatic air conditioning







DANGER:
- Risk of explosion from welding or soldering work on closed air conditioning system. Risk of poisoning. Inhaling overheated refrigerant vapors may be toxic. Risk of injury from skin and eye contact with liquid refrigerant.
- Do not carry out any welding work on the closed air conditioning system or in the surrounding area. No smoking or open flames. Wear eye protection 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.

CAUTION: Protect air conditioning circuit and components from moisture when carrying out repair work.

1 Remove drier cartridge

NOTE: Installation: Each time the refrigerant circuit is opened the drier cartridge must be replaced. Observe additional oil quantity after replacing parts

- Correct oil level in air conditioning after replacing parts.

2 Remove air inlet pipe (3)
3 Remove poly V-belt
4 Disconnect AC compressor connector (A9x1)
5 Unscrew screws (1)
- Screw for intake line on refrigerant compressor: 20 N.m
- Screw for pressure line on AC compressor: 20 N.m

6 Remove intake and high pressure lines (11,10) and place to one side.

CAUTION: Seal openings of intake and high-pressure lines (11,10) in order to avoid any contamination.

NOTE: Installation: Moisten threads and O-rings with compressor oil.

- See "Special Tools" given below.

7 Remove front engine compartment paneling
8 Undo screw (2)
- Screw for refrigerant compressor on bracket: 20 N.m

Remove torsion bar on front axle.

9 Unscrew screw (2a)
- Screw for refrigerant compressor on bracket: 20 N.m

10 Remove refrigerant compressor (A9)

NOTE: Withdraw refrigerant compressor (A9) behind the front axle carrier downwards.

11 Install in the reverse order
12 Correct oil level in AC compressor (A9)

CAUTION: If refrigerant compressor (A9) has to be renewed as a consequence of internal damage, then steps 13 and 14 should also be performed.

Replace
13 Replace intake and high-pressure lines (11, 10) with sealing rings
14 Replace expansion valve.

Special Tools

Set of Plugs, P/N# 129 589 00 91 00: