Komatsu Galeo PC138US-8 Shop Manual page 20

SEN01978-01
8. Precautions for disconnecting and con-
necting hoses and tubes in air conditioner
circuit
1) Disconnection
k
Collect the air conditioner refriger-
ant (R134a) from the air condi-
tioner circuit in advance.
a Ask professional traders for collecting
and filling operation of refrigerant
(R134a).
a Never release the refrigerant (R134a)
to the atmosphere.
k
If the refrigerant gas (R134a) gets
in your eyes, you may lose your
sight. Accordingly, when collect-
ing or filling it, you must be quali-
fied for handling the refrigerant
and put on protective goggles.
2) Connection
1] When installing the air conditioner cir-
cuit hoses and tubes, take care that
dirt, dust, water, etc. will not enter
them.
2] When connecting the air conditioner
hoses and tubes, check that O-rings
(1) are fitted to their joints.
3] Check that each O-ring is not dam-
aged or deteriorated.
4] When connecting the refrigerant pip-
ing, apply compressor oil for refriger-
ant (R134a) (DENSO: ND-OIL8,
ZEXEL: ZXL100PG (equivalent to
PAG46)) to its O-rings.
a Example of O-ring (Fitted to every joint of
hoses and tubes)
a For tightening torque, see the precautions for
installation in each section of "Disassembly
and assembly".
6
00 Index and foreword
PC138US, USLC-8