Instructions. At the start of production on vehicles with 4-cyl. and 6-cyl. the engines were equipped with compressors of the brand "Denso" type "6 SEU14". It is possible that later, depending on the engine and the time of manufacture, compressors from other manufacturers or other designs will also be installed. Compressor for vehicles with 4-cyl. engine and 6-cyl. The TDI engine can be removed and installed without opening the coolant lines. For vehicles with a 6-cylinder petrol engine, the climate compressor and settings can be removed from the bracket only when the air conditioning circuit is open.
Replacing the belt pulley
Instructions. If the pulley overload protection has tripped, check the compressor for ease of movement before replacing it. If the air conditioning compressor is difficult to move, replace it as an assembly. To remove the belt pulley, it is not necessary to remove the compressor from the engine. Depending on the engine option, it may be necessary to remove the panel from the vehicle and move it slightly forward (to free up some space). Depending on the type of compressor and engine model, different pulley models can be installed (various diameters). As a spare part, the belt pulley with driven disc and cap is individually numbered. The belt pulley and driven disk are bolted together (the bolt is not needed and can be recycled). Through this bolt, during manufacturing, a prescribed amount of a certain lubricant is introduced into the threads of the driven disk; this volume of lubricant is sufficient for a one-time installation of the driven disk on the compressor shaft (Therefore, the removed driven disk cannot be reused).
1. Cap; 2. Drive disk. Replace. Secure to the drive shaft of the air conditioning compressor, clean the threads of the compressor shaft before installing the driven disk. The threads of the new driven disk are already lubricated during production with a prescribed amount of a certain lubricant. Overload protection trips when torque is too high (e.g. compressor running difficult), and the pulley rotates freely without transmitting torque to the compressor. Rubber elements for separating the pulley from the compressor drive shaft (vibrations are dampened and noise is dampened). To install, lightly lubricate the rubber elements, e.g. with tire paste or soap solution (antifriction agent). Tightening torque 30 Nm; 3. Retaining ring. Replacement. Install correctly (flat side to compressor); 4. Pulley. The pulley is made of plastic and is not impact resistant and should be handled with extreme care. Various versions (e.g. depending on engine type); 5. Air conditioning compressor. Depending on the engine model and export versions of the vehicle, different models can be installed. Before installing the pulley, clean the compressor flange. Clean the compressor shaft thread and lightly lubricate it
Removing the belt pulley from the air conditioning compressor and reinstalling it
Instructions. Follow the instructions for replacing the belt pulley -E-. Carry out preliminary work in the same way as when removing the belt pulley. The pulley is made of plastic and is not impact resistant and should be handled with extreme care. If the overload protection of the driven disk -C- is triggered, it is possible to rotate the belt pulley -E- with the outer part of the driven disk -C-, without turning the compressor shaft -B- and the hexagon mounted on the driven disk -D- (inner part of the driven disk -C-).
Remove cap -A-. Hold the compressor drive shaft -B-, for example with a hexagon socket wrench (key to 7) and turn the driven disc -C- with the belt pulley -E- in the direction of the arrow -arrow-.
Instructions. The compressor drive torque is transmitted to the compressor shaft through the bolted connection of the driven disk -C- on the compressor shaft. If, during operation of the air conditioning compressor, the driven disk -C- is screwed onto the compressor shaft so tightly that it cannot be removed (a 7-B hex wrench may not transmit the required tightening torque), the compressor needs to be replaced.
Remove driven disc -C-. Remove circlip -A-. Remove belt pulley -B-.
Installation
Instructions. Replace circlip -A-. Clean the compressor flange in front of the pulley attachment -B-. When installing the retaining ring -A-, make sure that the ring is not bent more than necessary. Install belt pulley -B-. Insert the retaining ring -A- with the correct side, the beveled side -C- facing away from the compressor (flat side facing the compressor). Clean the compressor shaft thread. The threads of the new driven disk are already lubricated during production with a prescribed amount of a certain lubricant.
To install the driven disc, lightly lubricate the rubber elements -D-, e.g. with tire paste or soap solution (antifriction agent). Insert the rubber elements -D- into the belt pulley -B- according to the illustration. Place the rubber element of the driven disc -C- on the belt pulley -E- so that the driven disc -C- is positioned against the thread of the compressor shaft -B-. Screw the driven disc -C- counterclockwise -arrow- onto the compressor shaft -B-. Hold the compressor drive shaft -B-, for example with a hexagon socket wrench (key to 7) and turn the driven disc -C- with the belt pulley -E- counterclockwise -arrow- (tightening torque 30 Nm).
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