Removing and installing refrigerant compressor - ra83001400530x(0530)

Model 140, A. Engines 104, 119, B. Engine 120 

1. Engines 104 and 119 
   Fig 1: Identifying 3-Pole Connector Location

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

   Air conditioner	Drain (recycling).
   Lower engine compartment covering	Remove.
   Ribbed V-belt	Slacken and remove (13-342).
   Torsion bar	Disconnect at forward mountings (2 clamps, 4 self-locking nuts).
   	Always replace self-locking nuts and screws after removal.
   3-pole connector (A9x1)	Disconnect.
   Suction and pressure line	Disconnect at pipe group, tighten to 17 ± 3 Nm.

2. Engine 120 

Fig 2: Identifying Fan Shroud, Air Cleaner, Mass Meter And Engine Mount

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Oil Pressure Gauge Transmitter, 3-Pole Plug Connection And Bolts

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Locating Seal With Blanking Plate

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Connections	Seal off with blanking plate (a), part no. 140 830 01 27. Before installing a new compressor, slowly release pressure at service valve (arrow).
Oil level in refrigerant compressor	Correct. New refrigerant compressors are filled with 120 cm3 compressor (160 cm3 in refrigerant compressors for refrigerant R134a). (approved compressor oils, refer to Service Product Specifications, sheet no. 362.)
O-rings	Replace if refrigerant compressor is not replaced.
Install	In the reverse sequence, noting the following points: if the refrigerant compressor is replaced owing to internal damage (e.g. blockage or damage to the valve plates), the pipe on the compressor and the expansion valve must also be replaced (Removing and installing expansion valve  ). It is also necessary to check the function and direction of rotation of the auxiliary fans (clockwise) via the temperature sensor (see diagnosis manual).
Receiver dehydrator	Replace (Removing, installing and replacing receiver dehydrator  ).
Air conditioner	Evacuate and refill.
Oil level in engine and transmission	Correct.
Oil level for hydraulics	Correct.
Leaks	Check.
Air conditioner	Switch on and run engine at idle for approx. 4 minutes.
Air conditioner	Check function and check for leaks, ensuring that the air outlet temperature at the center outlets does not drop below +5°C. Replace evaporator temperature sensor if necessary (Removing, installing and checking evaporator temperature sensor  ).
	Parts which have come into contact with refrigerant compressor oil for R12 or R134a may only be installed in systems operating with the same refrigerant After completing the work: Erase fault memory in the control unit (Diagnosis manual - air conditioning).