Saab 900 Service Manual page 74

854-,-62 Heating and ventilation system, air conditioning system
Evaporator housing as from the 1984
models
To ensure that the evaporator can be fitted so
that leakage of drain water will not occur, the
inner fillet has been removed from the
evaporator housing as from the 1984 models.
Inner gusset
1
'i'
To change the refrigerant hoses
If there has been a rapid leak of refrigerant from
the system, such as from a burst hose, refrigera-
tion oil is likely to have escaped with the refriger-
ant. The quantity of oil lost must be replaced
(refer to 'Technical Data'). The procedure for
changing a hose is the same for all hoses.
1 Disconnect the negative (-) battery lead.
2 Drain the refrigerant from the system, in ac-
cordance with the instructions given
elsewhere in this section.
3 Change the defective hose.
4 Recharge, as necessary, with new refrigera-
tion oil. Fit new '0' rings that have been lubri-
cated with new refrigeration oil.
Refer to 'Technical Data' for details of tight-
ening torques.
5 Charge the system with refrigerant, in accor-
dance with the instructions given elsewhere
in this section.
6 Reconnect the battery lead and test the per-
formance ofthe system.
To change the. compressor, 1979·80
models
Note 1979 and 1980 model compressors are not
interchangeable. But replacement of the com-
pressor is carried out in the same manner.
Saab900