Method For Checking And Maintenance Air Conditioner - Komatsu PC88MR-10 Operation & Maintenance Manual

MAINTENANCE PROCEDURE
1.
Check the fluid level in window washer tank (1).
2.
If the level is low, add window washer fluid for automobile.
Be careful not to let dirt or dust get in when adding fluid.
Mixture ratio of pure washer fluid and water
The proper mixing proportion varies with the ambient temperature. Add washer fluid diluted with water at the
following proportion.
Area, season
Normal
Winter in cold district
Winter in extremely cold district Pure washer fluid
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.

METHOD FOR CHECKING AND MAINTENANCE AIR CONDITIONER

Check, maintenance items
Some maintenance items of the air conditioner need to be inspected periodically and the others are performed
irregularly. Inspect and service the air conditioner according to the following list to use it effectively.
Check, maintenance
items
Refrigerant (gas)
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.
4-34
Mixing proportion
Washer fluid 1/3: water 2/3 –10 °C
Washer fluid 1/2: water 1/2 –20 °C
Content of check, maintenance
Charge amount
Clogged fins
Operating condition
Damage, tension
Operating condition(does it make ab-
normal noise?)
Operating condition (does it function
normally?)
Mounting condition, looseness at tight-
ening or connecting portions, leakage
of gas, damage
Freezing temperature
–30 °C
Guideline for maintenance interval
Twice a year (spring, autumn)
Every 500 hours
"METHOD FOR CHECKING AND CLEANING
RADIATOR FINS, OIL COOLER FINS, AFTER-
COOLER FINS, FUEL COOLER FINS, AND AIR
CONDITIONER CONDENSER FINS (4-59)"
Every 4000 hours
Every 250 hours
"METHOD FOR CHECKING AND ADJUSTING
AIR CONDITIONER
TENSION (4-51)"
When required
When required
When required
WENAM00042
MAINTENANCE
COMPRESSOR BELT