Komatsu PC390LC-10 Shop Manual page 22

FOREWORD
13. When aligning two holes, never insert your fingers or hand. Be careful not to get your fingers caught in a hole.
14. When measuring hydraulic pressure, check that the measuring tool is correctly assembled before taking any
measurements.
15. Take care when removing or installing the tracks of track-type machines. When removing the track, the track separates
suddenly, so never let anyone stand at either end of the track.
16. If the engine is operated for a long time in a place which is not ventilated well, you may suffer from gas poisoning.
Accordingly, open the windows and doors to ventilate well.
17. Precautions for disconnecting and connecting hoses and tubes in air conditioner circuit.
A. Disconnection
i. Ask a qualified person for collection, and charge of the refrigerant
ii. Never release the refrigerant (R134a) to the atmosphere.
iii. When loosening the nuts fixing air conductance hoses and tubes, be sure to use two wrenches; one to fix and the
other to loosen the nut.
WARNING! Collect the air conditioner refrigerant gas (R134a).
B. Connection
i. When installing the air conditioner circuit hoses and tubes, take care that dirt, dust, water, etc. will not enter
them.
ii. When connecting the air conditioner hoses and tubes, check that O-rings (1) are fitted to their joints.
iii. Once an O-ring is used, it is deformed and deteriorated. Accordingly, do not reuse it.
iv. When removing O-rings, use a soft tool so that the piping will not be damaged.
v. Check that each O-ring is not damaged or deteriorated.
vi. Apply compressor oil for refrigerant (R134a)
★ However, do not apply oil to the threads portion of a bolt, nut
or union.
vii. When tightening nuts of the air conditioner hoses and tubes, be sure to use two wrenches; one to fix the nut and
the other to tighten the nut to the specified torque (Use a torque wrench for tightening).
c
00-6
If the refrigerant gas (R134a) gets in your eyes, you may lose your sight, and if it touches
your skin, you may suffer from frostbite. Accordingly, when collecting or adding it, you
must be qualified for handling the refrigerant and wear protective goggles, gloves and
clothing with long sleeves.
Manufacturer
DENSO
VALEO THERMAL ZXL100PG (equivalent to
SYSTEMS
SANDEN
SAFETY
Part Name
ND-OIL8
PAG46)
SP-10
PC360/390LC-10