A/C Compressor Regulator Valve -N280-, REMOVING AND INSTALLING: Installing

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-- Check the A/C compressor mount -C- and the circlip groove for dirt, and if necessary, clean them carefully and thoroughly with a clean, lint-free cloth.

CAUTION:

Danger of another A/C Compressor Regulator Valve -N280- -B- or A/C compressor failure due to dirt in the A/C compressor or damage to the sealing surfaces in the mount.

If necessary, carefully clean the A/C compressor mount -C- using only a clean, lint-free cloth (do not use compressed air).
Make sure while cleaning the mount -C- that no dirt gets into the area underneath the O-ring sealing surface -F- or the existing channels and none of the mount sealing surfaces become damaged.

-- Check the A/C compressor mount -C- for damage (also pay attention to small scratches on the surface, if there is damage, replace the A/C compressor).

-- Check the O-rings -F, G and H- und -E- (if applicable) of the A/C Compressor Regulator Valve -N280- -B- for damage.

-- Coat the O-rings -F, G and H- and -E- (if applicable) of the A/C Compressor Regulator Valve -N280- -B- lightly with refrigerant oil and check for proper seating.

-- Insert the A/C Compressor Regulator Valve -N280- -B- until the stop in the A/C compressor mount -C-.

-- Install the new circlip -A- and check for proper seating in the groove.

-- Install the removed parts in the opposite order.

-- Evacuate and refill the refrigerant circuit. Refer to USING SERVICE STATION .

NOTE:

Should refrigerant oil escape with the A/C Compressor Regulator Valve -N280- -B- removed, add this amount of refrigerant oil while filling the refrigerant oil with the A/C service station. Refer to USING SERVICE STATION .

-- Check the A/C function. Refer to PRESSURES, CHECKING and OVERVIEW - REFRIGERANT CIRCUIT (vehicle-specific repair information).