Correct oil level in air conditioning system when replacing AC compressor

AR83.55-P-5250P

Correct oil level in air conditioning system when replacing AC compressor

06.06.2019

Engine

111, 112, 113, 271, 611, 612 in model 203

with code 580 (Air-conditioning system)

Engine

111, 112, 113, 271, 611, 612 in model 203

with code 581 (Automatic air conditioning)

Engine

112, 113, 271, 612 in model 209

Draining

 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 drained.

AS83.00-Z-0001-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Topical note

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

AH83.30-N-0005-01A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

Repair work for defective refrigerant circuit

AH83.30-P-1782-01A

1

Drain new refrigerant compressor

 Drain compressor oil through the openings for low pressure and high-pressure lines.

 Perform work rapidly, since compressor oil is hygroscopic.

2

Drain removed refrigerant compressor

 Use suitable measuring cup.



Check

3

Check condition of compressor oil

 Check compressor oil for signs of contamination (color dark gray - black).



Measure

4

Measure quantity of compressor oil drained from removed refrigerant compressor

Filling

5

Fill new AC compressor

 Fill the quantity of compressor oil drained from the removed refrigerant compressor plus an additional 20 cm3 into the new refrigerant compressor. Always use new compressor oil.