Volvo Maintenance Hints for 7xx/9xx - Bill Garland's Nuclear ...

coating, except it comes in a convenient aerosol can, obviating the need for a fancy blowgun
and wand driven by shop air. The product comes individually (Part No. AT-211) For further
information on various cleaners and coatings see the article at IMCool.com: http://www.imcool.
com/articles/aircondition/evap_stinks.htm
c. Real crud in the system; clogged evaporator; downstream dirt. Bad news: you will have to
remove the plenum lower cover. Do all of the above, then around ten screws holding the lower
plenum on. These screws are in all kinds of weird places, requiring extraordinary personal
dexterity and a few socket extensions, bendable extensions and magnetic tips. The plenum
cover is held on with thick mastic and is a bear to remove without damage. Once you pull it off,
clean everything out, insert the drain tube, replace the mastic and put it back in place. Don't do
this unless all else fails.
Removing Panel Vents. [Inquiry] How do you remove the vents from the dash? [Response:
JohnB] A straight screwdriver used as a small pry bar works, since the vents are just popped
into holes in the sides. But be careful: there may be a cupped thin metal friction washer used to
hold the vent in a set position. To avoid losing this down the duct, close the vent before
removing it. [Noel DeSouza] On my 85 740, you press-in and then pull-out from the side to
retract the hinge-stub. [Editor] Insert a small flat screwdriver between the surrounding plastic
trim and the side of the moving vent opposite the air flow selector wheel. Carefully lever the vent
out.
Climate Control Units:
Access to Climate Control Unit.
Removing the CCU Unit. [Jay Simkin] To remove the CCU control unit: (a) Remove storage tray/
lighter unit (removal bezel around lighter [lifts off with fingers, grip on the edge at the "passenger
side" of the bezel and pull gently], two Philips head screws, and three electrical connectors to
the lighter). Using a blunt-edge putty knife, press the edges of the console outwards, so that one
side of the storage tray can be pulled out. Then, the other side will come free easily. This is
easier than trying to pull the storage tray straight out. (b) Remove the black plastic faceplate
around the climate control unit. It is fragile, so be GENTLE. Start at the section around the
climate control unit. Using your fingernails, gently lift, to disengage the thin plastic rim from the
lugs that secure it. It will come free with little effort. To free the center part of the faceplate, from
the clip that secure it, use a 1" wide flexible putty knife - with the edges blunted (use sandpaper
to do this). You need to lift the center section of the faceplate, that is between the climate control
unit and the switches (which are to the right of the ignition). There is a metal clip behind this
center section. Insert the putty knife edge at the bottom of the center section. With the putty
knife at 45-degree angle to the face of the console, insert the edge of the blade into the opening
at the bottom edge of the faceplate's center section. Push the knife handle downwards, gently,
levering outward on the plastic faceplate. When the clip "pops" free, move towards the driver's