Komatsu HB365LC-3 Operation & Maintenance Manual page 385

MAINTENANCE
Check and mainte-
nance items
Air conditioner con-
denser
Compressor
V-belt
Blower motor, fan
Control mechanism
Piping mounts
Even during the off-season, operate the air conditioner for 3 to 5 minutes once a month to maintain the oil film at
all parts of the compressor.
Check level of refrigerant (gas)
If the refrigerant used in the air conditioner gets into your eyes or is splashed on your hands, it may
cause loss of sight or frostbite. Never touch the refrigerant. Do not loosen any part of the refrigerant
circuit.
Do not bring any open flame close to any point where the refrigerant gas is leaking.
If the level of the refrigerant (gas) is low, the cooling effect will be reduced. Perform the check while running the
engine at full throttle and operating the air conditioner at high speed.
Check the condition of the refrigerant gas (Hydrofluorocarbons
HFC-134a) that circulates the refrigerant circuit, through sight
glass (1) (inspection window) at the refrigerant hose fitting.
Content of check and maintenance Guideline for maintenance interval
Clogged fins
Operating condition
Damage, tension
Operating condition (Check for un-
usual noise)
Operating condition (Check that func-
tion is normal)
Mounting condition, looseness at
tightening or connecting portions,
leakage of gas, damage
k k
Every 500 hours
"METHOD FOR CHECKING AND CLEANING
RADIATOR
EQUIPMENT), OIL COOLER FINS, AFTER-
COOLER FINS, AND AIR CONDITIONER CON-
DENSER FINS (4-58)"
Every 4000 hours
Every 250 hours
"METHOD FOR CHECKING AND ADJUSTING
AIR CONDITIONER COMPRESSOR BELT TEN-
SION (4-49)"
When required
When required
When required
WARNING
MAINTENANCE PROCEDURE
FINS (FOR ENGINE, HYBRID
4-37