Removing and installing auxiliary fans - ra83001400560x(0560)

Model 140, A. Engines 104, 119 up to 05/91, B. Engines 104, 119, 120 as of 06/91 

1. Engines 104, 119 up to 05/91 
   Fig 1: Identifying Auxiliary Fans Components

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

   Battery	Disconnect negative pole.
   Protective grille	Remove, 2 clips (1), 2 screw clips (2).
   Electrical connectors (M4 X 1 and M4 X 2)	Disconnect.
   Screw, top left and right (3)	Unscrew and expose cable for auxiliary fan.
   Remove auxiliary fans	Unscrew 3 screws (4) on each and remove fan.
   Install	In reverse sequence.
   Function check	Perform by disconnecting plug on coolant temperature sensor for air conditioner B10/8 and setting 310 Ω (stage I) or 250 (stage II) with an ohm decade (124 589 09 63 00) connect battery, switch on ignition and set control unit (KLA) to "Auto". Auxiliary fans rotate clockwise.
   	After completing the work: Erase fault memory in the control unit (Diagnosis manual - air conditioning).

   Special tool 

   Fig 2: Identifying Special Tools (124 589 09 63 00 15 54))

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
2. Engines 104, 119 and 120 as of 06/91 

Fig 3: Identifying Auxiliary Fans Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Air conditioner	Empty (recycling)
Battery	Disconnect negative pole.
Protective grille	Remove, 2 clips (1), 2 screw clips (2).
Electrical plug connections (M4x1 and M4x2)	Disconnect.
Upper pressure line	Unscrew at condenser and seal openings (part set 140 830 01 27).
Raise vehicle	Open left opening in bumper.
Bracket for pressure line	Remove (1 nut)
Pressure line on condenser	Remove and seal openings
Radiator together with condenser	Remove (20-4200) .
3 screws (4)	Unscrew.
11 clips (94)	Press out and remove frame (90).
Plug connections M4x1, M4x2	Disconnect.
5 screws (84)	Unscrew.
Auxiliary fan	Remove.
Auxiliary fan	Disconnect, unscrew 2 screws (88).
Install	In reverse sequence whilst lubricating the connection thread with compressor oil (refer to note).
Receiver dehydrator	Renew (Removing, installing and replacing receiver dehydrator  ).
Air conditioner	Evacuate, refill, check function and leaks; only run engine at idle in the first 4 minutes.
	NOTE: If the condenser is not reinstalled immediately, flush out the condenser with nitrogen. Then seal off the connection with plugs. When renewing the condenser, fill it with 20 cm3 compressor oil.
Function check	Perform by disconnecting plug on coolant temperature sensor for air conditioner B10/8 and setting 310 Ω (stage I) or 250 Ω (stage II) with ohm decade (124 589 096 300), connect battery, switch on ignition and set control unit (KLA) to "Auto". Auxiliary fans rotate clockwise.
	Parts which have come into contact with compressor oil for R12 or R134a may only be installed in systems operating with the same refrigerant.

Special tool 

Fig 4: Identifying Special Tools (124 589 09 63 00 15 54)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.