SEAT Workshop Service and Repair Manuals > Leon Mk1 > Heating, ventilation, air conditioning system | Heating, air conditioning | Air conditioner | Repair work on refrigerant circuit which may be performed only in suitable workshops by specially trained mechanics | Repairing Sanden air conditioning system magnetic clutch N25 with air conditioner compressor removed

Removing air conditioning system magnetic clutch N25 from and installing on air conditioner compressor

Removing air conditioning system magnetic clutch -N25- from and installing on air conditioner compressor

Unscrewing hexagon nut

–	Use pin wrench -3212- or counterhold -V.A.G 1616- to unscrew hexagon nut.

Pulling off clutch disc

Note

If this version is the one without the 3 threads in the clutch disc, lever out the clutch disc carefully using 2 screwdrivers as illustrated.

Note

The three hexagon bolts of puller -V.A.G 1616/1- have 1/4" threads.

Pulling off poly V-belt pulley for magnetic clutch

–	Place hooks -arrow- as shown in illustration.

Note

If hook is placed on lower edge of poly V-belt pulley, there is a danger of damaging air conditioning system magnetic clutch -N25-.

–	Pull off poly V-belt pulley with a commercially available two-arm puller, e.g. Kukko 20-10 with 100 mm long hooks.

Pressing off ball bearing

Pressing in ball bearing

Pressing on poly V-belt pulley for air conditioning system magnetic clutch -N25-

Note

Set compressor in place flat, or there is a danger that poly V-belt pulley could deformed when pressed on.

–	Drive back threaded bush -1-.

Checking and adjusting clearance

–	Measure clearance with a depth gauge while repeatedly switching air conditioning system magnetic clutch -N25- on and off (applying a 12 V current).

t	Specification: 0.4 to 0.8 mm

–	If necessary, use spacers to adjust clearance. Pull off clutch disc to do this.

Note

t	The clearance must lie within permitted tolerances over the complete circumference.

t	The clearance can also be measured when the air conditioner compressor is installed.

t	If the clearance is outside of the specifications, remove the clutch disc and adjust the clearance by removing or adding spacers.