Subaru SVX 1992 Manual page 984

AUTOMATIC AIR CONDITIONING SYSTEM [w4031 4-7
4. O-ring Connections
1 . GENERAL
The following points should be kept in mind when
assembling O-ring connections :
1) Avoid unnecessary handling and contact of 0-rings
with your hands, since even clean fingers contain body
acids, which can contaminate the O-ring surface .
2) Do not handle 0-rings with gloves, shop towels, etc .,
since lint particles may cling to the O-ring, possibly
causing a leak upon assembly .
3) Always lubricate 0-rings before assembly to allow
the O-ring to seat itself properly.
4) Be certain to use torque wrenches when tightening
O-ring fittings, because overtightening can not only
damage the O-ring, but it can distort the tube end as
well.
2. REMOVE PROTECTIVE SEALS
Just prior to making the connection, remove the pro-
tective seals.
If for any reason you have to stop before making a
connection, recap the tube, component or fitting.
B4-671
Fig . 104
Visually inspect the O-ring surface, the O-ring mating
surface, the threads and the connection points . If a
defective part is found, replace it .
The O-ring must sit square against the tube bead . If
necessary, slide the O-ring into proper position with
clean hands.
O-ring
Not O.K .
Bead
Not O.K .
O.K .
B4-672
Fig. 105
3. LUBRICATE THE COMPONENTS
For lubrication of the components, use only refrigerant
oil as described in the appropriate service manual .
Apply oil from an oil squirt gun or other closed con-
tainer . Do not use your finger to spread the oil over the
O-ring .
Apply a small amount of refrigerant oil to the top and
sides of the O-ring . The area covered by oil should
include the O-ring and the tube bead .
O-ring
Apply
refrigerant
oil.
0
Do not apply refregerant oil to
the threads .
B4-673
Fig. 106
49