Page 51
OOO ———————
Seats, seat cushions and carpeting 852-5
Separating the backrest from the seat
cushion
1 Remove the cover on the backrest adjusting
knob, rotate the bayonet clip and then re-
move the knob.
& 2 Remove the plastic cover from the side of
r the seat.
© wo
3 Remove the two screws as illustrated.
The screws have HIGRIP No. 8 dodecagonal
heads. Ideally the HIGRIP No. 8 socket
should be used or, failing that, a6 mm hexa-
gon socket bit or an XZN No. 8 dodecagonal
socket, can be used although the fit will be
inferior.
© &
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4 Up to 1982 models:
Remove the circlip on the opposite side.
(The circlip locks the backrest frame pivot in
against the seat frame.) The backrest can
now be separated from the seat.
As from 1983 models:
Remove the screws securing the mechanism
to the seat frame. Unhook the backrest from
the seat.
Saab 900
Page 52
Seats, seat cushions and carpeting 852-7
5 Fold back the flaps from the grooves inside
the aperture.
6 Remove the cover.
To refit, reverse the removal procedure.
Changing the backrest cover, as from
ow dy 1980 models
1 Raise the head restraint to the upper posi-
tion.
” 2 Remove the self-tapping screw from the
7 wy upper front edge of the backrest (accessible
if the cover is carefully pulled down).
ad w 3 Press the two spring-loaded tongues of the
head restraint mounting catch towards each
other. Pull up the head restraint and remove
dl it.
ww a
Saab 900
Page 53
852-8 Seats, seat cushions and carpeting
4 Unzip the cover at the bottom and unhook
both the hooks at the bottom of the back-
rest, one on either side.
5 Roll up the cover and unhook both the wires
which hold it front and back. Remove the
cover.
To eliminate creaking noise in the back-
rest
Lubricate the backrest pivot pin on the inside
with silicone spray.
Lubricate the ends of the wire in the plastic
bushes shown in the illustration as follows:
Unzip the backrest cover at the bottom.
Take a little grease on a finger, reach up under
the backrest cover and apply the grease to the
wire near the bush.
Repeat the procedure on the opposite side, and
move the wire back and forth, so that the grease
will enter into the bushes.
Saab 900
Page 54
Seats, seat cushions and carpeting 852-9
To check the heating pads (insufficient
heat)
Note
When checking the passenger seat, the seat
switch must be closed.
1 Disconnect the connector through which
power is supplied to the heating element.
2 Switch on the ignition and check that the
supply to the connector is live. Use a test
lamp.
If the supply to the connector is live, check
the circuits in the seat cushion and backrest
as follows:
3 Connect a buzzer to the seat connector. Cool
the thermostat by spraying aerosol refriger-
ant onto it.
If the circuit is in good condition but the seat
still fails to warm up, the heating wires may
be too close to the thermostat.
If the heating wires are too close to the ther-
mostat:
4 Remove the seat from the car
Release the seat cushion cover by removing
the clips at the bottom edge, the tensioning
spring on the right-hand side of the seat and
the bottom tensioning spring. Raise the seat
cover so that the thermostat will be accessi-
ble.
5 Heating pads on netting:
Adjust the distance between the heating
wires and the thermostat to 6 - 7 mm. Secure
the wires with thread, for instance.
If necessary, use impact adhesive to secure
the heating pad in position.
SUL smn
-— —
7TT
6-7 mm
Si 026
Saab 900
Page 55
852-10 Seats, seat cushions and carpeting
Heating pads on foam plastic:
The heating wires should be 8 -10 mm from
the thermostat.
Carefully cut away the foam plastic around
the thermostat. Carefully lift off the wires
which are too close to the thermostat and
move them so that they are 8 - 10 mm from
the thermostat. Use repair patch
(10)95 51 227 to secure the wires.
6 Refit the seat cover and fit the seat back into
the car.
7 Connect the connector and check the perfor-
mance of the heating pad.
SI 107
Changing the heating element
1 Take out the seat.
2 Remove the seat upholstery. Remove the
backrest cover (see under "Changing the
backrest cover”). The seat cover is removed
by undoing all the lower clips, the rib on the
right-hand side of the seat and the base rib.
Pull up the cover from the right, and tuck it
out of the way so that the heating element is
accessible.
3 Remove the heating element (or elements).
Dissolve the glue with pure gasoline (clean-
ing gasoline) so as not to tear off large
pieces of the foam rubber cushioning.
4 Glue on the new heating element (or ele-
ments) with suitable impact adhesive such
as Bostik A3. Connect the wiring so that the
elements are in series.
5 Replace the upholstery and fit the seat.
Saab 900
Page 56
€
Seats, seat cushions and carpeting 852-11
To change the thermostat (on netting)
Remove the seat cover, see points 1-2 ”Chang-
ing the heating element”. Remove the binding
threads from the thermostat cables, after which
the thermostat can be pulled out and replaced.
Fit binding threads to the new thermostat to
eliminate the risk of the cables working loose
after a time. Check that the distance between
the thermostat and the nearest heating wire is at
least 6 - 7 mm (see page 852-9).
To change the thermostat (in foam plas-
tic)
1 Release and lift off the seat cover, so that
the thermostat will be accessible.
2 Carefully cut away the foam plastic around
the thermostat. Fit a new thermostat and
locate it so that the heating wires are at
least 8 - 10 mm from the thermostat.
3 Secure the thermostat and the heating wires
with repair patches (10)95 51 227.
4 Replace the seat cover and fit the seat back
into the car.
5 Connect the connector and check the perfor-
mance of the thermostat.
S! 106
Saab 900
Page 57
Vacuum hoses
IN= 850mm
1 = 850 mm, recirculation damper
2 = 550 mm, centre facia outlet
3= 50+ 750 + 750mm, outer facia outlet
4 = 400 mm, defroster
5 = 500 mm, floor damper, left-hand e
6 = 550 mm, floor damper, right-hand
A, Vacuum connection
B. Air distribution control