Komatsu WA800-1 Operation & Maintenance Manual page 114

WHEN REQUIRED
h. CHECK AIR CONDITIONER
No refrigerant
Lack of refrigerant
Correct amount
Check refrigerant (gas) level
If the refrigerant level is too low,
the cooling effect is reduced. When
the cooler is being operated at high
speed, air bubbles cannot usually be
seen in the sight glass (inspection
window) installed on the receiver on
the right side of the air cleaner.
If air bubbles are formed, the
refrigerant level is too low, so have
your dealer add refrigerant
immediately.
Cooler
:ondition
remp. of high,
and low
xessure pipes
jight glass
Connections
of pipes
General condi-
tion of cooler
Normal
High pressure pipe is High pressure pipe is
hot. warm.
Low pressure pipe is Low pressure pipe is
cold. cold.
Clear difference in Little dirrerence in
temperature temperature
Almost transparent.
Any bubbles disappear
if the engine speed is
reaised or lowered.
0
0
0
0
0
Properly connected
Coolant level correct,
no abnormalities.
Ready for use
-
Abnormal
Bubbles are always
flowing. Sometimes
becomes transparent,
or shite bubbles
appear.
Some parts dirty with
oil
May be a leak some- Almost all coolant has
where. Call service leaked out.
repair shop for Contact service repair
inspection, shop immediately.
Almost no difference ir
temperature between
high and low pressure
pipes.
Misty substance is
flowing.
z_--
---
-_- --.
-_
- -----
0
--- = -z_
- - _=
_z z- -
- _-
-
zt;;;arts very dirty
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w-04324