Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1999 1999 Service Manual MECHANICAL COMPONENTS SECTION AIR CONDITIONING SYSTEM MSA5TCD99L332

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4-7    [W4A0]                        SERVICE PROCEDURE
4. O-ring Connections


4. O-ring Connections                                      C: LUBRICATE THE COMPONENTS
A: GENERAL                                                 For lubrication of the components, use only refrig-
                                                           erant oil as described in the appropriate service
The following points should be kept in mind when           manual. Apply oil from an oil squirt gun or other
assembling O-ring connections.                             closed container. Do not use your finger to spread
1) Avoid unnecessary handling and contact of               the oil over the O-ring.
O-rings with your hands, since even clean fingers          Apply a small amount of refrigerant oil to the top
contain body acids, which can contaminate the              and sides of the O-ring. The area covered by oil
O-ring surface.                                            should include the O-ring and the tube bead.
2) Do not handle O-rings with gloves, shop towels,
etc., since lint particles may cling to the O-ring,
possibly causing a leak upon assembly.
3) Always lubricate O-rings before assembly to
allow the O-ring to seat itself properly.
4) Be certain to use torque wrenches when tight-
ening O-ring fittings, because overtightening can
not only damage the O-ring, but it can distort the
tube end as well.

B: REMOVE PROTECTIVE SEALS
1) Just prior to making the connection, remove the
protective seals.
CAUTION:
If for any reason you have to stop before mak-
ing a connection, recap the tube, component or
fitting.




                                                                                                   G4M0583




                                        G4M0581

2) 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.




                                        G4M0582



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                                     SERVICE PROCEDURE            [W4D0] 4-7
                                                          4. O-ring Connections


D: TORQUE THE FITTING
Using a back-up wrench in conjunction with a cali-
brated torque wrench, torque the connection to the
midrange of the specification.
After completion of torquing, use a clean shop
towel to remove any excess oil from the connection
or any oil that may have dripped on the vehicle
body or other parts.
CAUTION:
If a leak is suspected after torquing, do not
retighten or retorque the connection. Instead,
disassemble the connection, remove the
O-ring, and inspect the O-ring, threads, joints
and seating surfaces.




                                       G4M0584




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