DENSO A/C COMPRESSOR (VERSION 1)
Note. Observe notes on replacing belt pulley. Refer to BELT PULLEY, DENSO A/C COMPRESSOR, VERSION 1 . Perform preliminary work as for removing belt pulley. Refer to A/C COMPRESSOR BELT PULLEY, REPLACEMENT . Belt pulley is made of plastic and is sensitive to impact, therefore handle it with special care. If overload safeguard of drive plate -C- has triggered, drive plate can be pried off from belt pulley -D- after removing circlip -A- To optimize noise reduction, a circlip -A- with a rubber disc vulcanized on it is installed. Refer to BELT PULLEY, DENSO A/C COMPRESSOR, VERSION 1 . This rubber disc can reduce a clapping (castanet-like) noise which occurs especially at belt pulley in vehicles with Diesel engine in A/C system operating mode "Econ" ("AC off") (the noise is almost inaudible with A/C system operating at full output).
Removal
Using a small screwdriver or needle-nose pliers, carefully remove circlip -A- (with rubber disc vulcanized on to it). Refer to BELT PULLEY, DENSO A/C COMPRESSOR, VERSION 1 ; take extreme care not to damage belt pulley when doing this.
Scheme 47
Hold the A/C compressor input shaft -B- securely with a standard socket wrench and turn drive plate -C- with pulley -D- in direction of arrow -E- (tightening torque 35 Nm).
Remove drive plate -C-.
Remove circlip -A-.
Scheme 48
Remove pulley -B-.
Installation
Note. Replace circlip -A-.
Clean the A/C compressor flange before sliding on the belt pulley.
When installing the circlip -A-, note that it cannot be bent open more than is necessary for installation.
Install belt pulley -B-.
Insert circlip -A- on correct side, the side with beveled insertion edge -C- faces away from A/C compressor (install flat side facing compressor).
Insert rubber element -D- in belt pulley -B- according to illustration.
When installing drive plate, coat rubber element -D- lightly e.g. with tire mounting paste or soap solution (as sliding compound).
Insert the drive plate -C- far enough into rubber elements -D- (see upper illustration) until it contacts A/C compressor shaft -B-.
Install the drive plate -C- on the compressor shaft -B- by rotating it in the direction of the arrow -F-.
Tighten drive plate -C- (above pulley -D-) to 35 Nm by turning with a standard band wrench (with webbing) in direction of arrow -F-, hold compressor shaft -B- with a standard socket wrench.
Install circlip -A- (with rubber disc vulcanized on).