Komatsu PC200-8M0 Shop Manual page 22

SEN06112-00
When loosening the nuts fixing air conditioner
q
hoses and tubes, be sure to use two wrenches;
use one wrench to fix and use the other one to
loosen the nut.
Connection
q When installing the hose for the air conditioner
circuit, take care not to allow invasion of dirt,
dusts and water into the hose.
q Check that the O-rings are fitted to the joints
when connecting the air conditioner piping.
Once an O-ring is used, it is deformed and
q
deteriorated. Accordingly, do not reuse it.
q When removing the O-rings, use a soft tool so
that the piping is not damaged.
Check that the O-ring is not damaged or deteri-
q
orated.
q Apply compressor oil for refrigerant (R134a) to
the O-ring.
a However, do not apply oil to the threaded
portion of a bolt, nut or union.
Manufacturer
DENSO ND-OIL8
VALEO THERMAL ZXL100PG (equivalent to
SYSTEMS PAG46)
SANDEN SP-10
When tightening nuts of the air conditioner
q
hoses and tubes, be sure to use two wrenches.
Use one wrench to fix and tighten the nut with
the other wrench to the specified torque (Use a
torque wrench for tightening).
a Example of fitting of O-ring
q An O-ring is fitted to every joint of the air
conditioner piping.
6
00-200
Part name
200 Foreword and general information
Foreword, safety and general information
For tightening torques, see "Others", "Precau-
tions for disconnection and connection of air
conditioner piping".
PC200, 200LC, 220, 220LC-8M0