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Climatronic - Air conditioner with automatic regulation - Part 1 > < Repairing Air conditioner magnetic coupling N25
Repairing Air conditioner magnetic coupling N25
   
Repairing Air conditioner magnetic coupling - N25-
Special tools, test and measuring equipment and aids required
t  Two-arm extractor commercially available e. g. -Kukko 20-10- with hook 100 mm clamping depth
t  Depth gauge
t  Strap wrench
  Note
t  It is not necessary to open the refrigerant circuit to repair the magnetic coupling.
t  Repairs on the magnetic coupling with the compressor installed should only occur in exceptional cases.
t  If the compressor needs to be removed the vehicle must be serviced in a workshop with trained mechanics (service centre for air conditioning systems) because the refrigerant must first be drained at a service position.
t  Repair of magnetic coupling with the compressor removed → Chapter.
1 - 20 Nm
q   removing and installing → Fig.
2 - Clutch disc
q   depending on the type it can have another shape, the damage is identical.
q   remove → Fig.
3 - Spacers
q   to set the gap between the clutch disk and belt pulley
q   Clearance: 0.4…0.6 mm
q   Check gap → Fig.
4 - Circlip
q   replace:
–  Fit on correct side:
   The smooth side points to the compressor.
q   pay attention to correct fit in slot
5 - Belt pulley
q   remove using a commercially available two or three armed extractor
To avoid damaging the belt pulley pay attention to the correct position of the extractor.
6 - Circlip
q   replace:
–  Fit on correct side:
   The smooth side points to the compressor.
q   pay attention to correct fit in slot
7 - Solenoid coil
q   installing → Fig.
  Note
An overheating fuse is built into the solenoid coil. The overheating fuse will cut out the solenoid coil as soon as (e.g. because of compressor resistance) the magnetic coupling starts overheating.
8 - Screw
9 - Compressor

   
Releasing and tightening the hexagon combination screw
  Note
If the rubber shock absorber is torn, it is preferable to release the screw using an impact screwdriver for compressed air.
–  Unscrew the hexagon combination screw.
t  Tightening torque: 20 Nm
Please use a strap wrench to counterhold -A- with a fabric strap.
  A87-0082
Remove clutch disk
–  Carefully release the clutch disk with two screwdrivers and remove.
If the clutch disk is tight please use a commercially available two or three armed extractor.
  A87-0083
Install solenoid coil
–  Place solenoid coil on the compressor.
–  Position the arrester pin -A- in the recess -B-.
  A87-0084
Testing and adjusting gap
t  Clearance: 0.4…0.6 mm
Determine dimension “1”
–  Measure the gap between the belt pulley and the clutch disk with a depth gauge -C- and take down dimension.
Please perform three measurements in different positions. There must be no dimension deviations.
Determine dimension “2”
–  Disconnect plug connection -A- on compressor.
–  Connect plug connection -A- using an adapter cable to the vehicle battery (Pos. term.).
–  Determine gap.
The gap is the difference between dimension “1” and dimension “2”.
  Note
t  The gap must be within the specified tolerance over the entire circumference.
t  The gap can also be measured with the compressor fitted.
t  If the gap is outside the nominal value, remove the clutch disk and adjust the gap by removing or inserting spacers.
  A87-0085

Climatronic - Air conditioner with automatic regulation - Part 1 > < Repairing Air conditioner magnetic coupling N25