Method For Checking And Maintenance Air Conditioner - Komatsu PC30MR-5 Operation & Maintenance Manual

MAINTENANCE PROCEDURE
Area, season
Winter in extremely cold district
There are 2 types depending on the freezing temperature: -10 °C (general use) and -30 °C (cold district
use), select according to the area and season.
4.
Close the dirt cover (1).

METHOD FOR CHECKING AND MAINTENANCE AIR CONDITIONER

(Machine with cab specification)
CHECK AND MAINTENANCE ITEMS
Some check and maintenance items of the air conditioner are to be performed periodically and the others are to
be performed when required. Perform the check and maintenance according to the following list, and use the air
conditioner effectively.
Check and maintenance
items
Refrigerant (gas)
Air conditioner condens-
er
Air conditioner compres-
sor
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 air conditioner compressor.
TEST THE LEVEL OF REFRIGERANT FOR AIR CONDITIONER (GAS)
(Machine with cab specification)
• Never touch the refrigerant.
Do not loosen any part of the refrigerant circuit.
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.
• 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.
4-34
Mixing proportion
Pure washer fluid
Content of check, maintenance
Charge amount
Clogged fins
Operating condition
Damage, tension
Operating condition (Check for un-
usual noise)
Operating condition (Check that
function is normal)
Mounting condition, looseness at
tightening or connecting portions,
leakage of gas, damage
k k
WARNING
-30 °C
Guideline for maintenance interval
Twice a year (spring, autumn)
Every 500 hours
"METHOD FOR CHECKING AND CLEAN-
ING RADIATOR FINS, OIL COOLER FINS,
FUEL COOLER FINS, AND AIR CONDI-
TIONER CONDENSER FINS"
Every 4000 hours
Every 250 hours
"METHOD FOR CHECKING AND ADJUST-
ING AIR CONDITIONER COMPRESSOR
BELT TENSION"
When required
When required
When required
WENAM00150
MAINTENANCE
Freezing temperature