Saab 900 Service Manual page 42

854-30 Heating and ventilation system, air conditioning system
Replenishing the refrigeration oil
If the system is overcharged with refrigeration
oil, its cooling capacity will be diminished. Con-
versely, an insufficient charge of refrigeration oi I
will result in the compressor being damaged. In
conjection with work to repair leaks or when a
component is being replaced, the refrigeration
oil must be replenished. The amount of addi-
tional oil required by the individual components
will depend on whether the leakage has been
rapid or slow.
Slow leaks (longer than 24 hours)
If the leak has been slow, refrigeration oil will not
normally have been lost. However, the following
procedure should be followed if a component is
being replaced at the same time.
Compressor·
Drain the refrigeration oil from the old compres-
sor and measure the volume. Completely drain
the new compressor as well. Thereafter, re-
charge the new compressor with the same
volume of oil as that drained from the old one
(minimum charge volume: 1 dl).
Other components
Drain off the refrigeration oil from the old compo-
nent and measure the volume. Charge the new
component with the same volume of oil before
fitting.
Sudden leakage (e. g. due to burst hose)
In the event of sudden leakage, some lubricating
oil will often be lost with the refrigerant. When
components are replaced, the new components
must then be filled with the oil quantities tabu-
lated below. Pour the oil directly into the hose or
component.
i
I
!
Com pressor,
Delco, Sankyo
Clarion
Evaporator
Dryer
Condenser
Hose
VIR assembly
Quantity drained from removed
compressor +0.3 d I.
Only quantity drained from
the removed compressor
0.5dl (O.4dlforClarion)
0.2dl (0.1dlforClarion)
0.2dl
0.2dl (0.1dlforClarion)
0.2dl
Saab900