Hitachi ZAXIS 30U-5N User Manual

MAINTENANCE
7-88
Check Air Conditioner (Cab Equipped Machine)
--- daily
ZX35U-5N Serial No. 270001-270727
ZX50U-5N Serial No. 280001-280687
ZX60USB-5N Serial No. 285001 and up
Check pipe connections for refrigerant gas leakage
If oil seepage is found around pipe connections, it indicates
possiblegasleakage.
Check Refrigerant
Starttheengineandrunatapproximately1500min
-1
(rpm).
TurntheairconditionerswitchtoON.Settheblowerswitch
to HI and set the temperature control switch to the coolest
position(18°Conthemonitorscreen).Operatetheair
conditionerfor2to3minutes.Checkifcoolaircomesout
from the vent in the cab.
Kind of refrigerant and amount when shipping the
machine
Model Type Amount
ZX35U-5N,50U-5N
HFC134a
0.65±0.05kg
ZX60USB-5N 0.85±0.05kg
IMPORTANT: Do not dispose FREON gas into the
atmosphere to prevent depletion of the ozone layer
and global warming.
Check the condenser
If the condenser fins become clogged with dirt or insects,
the cooling effect will be decreased.
Besuretokeepthemcleanatalltimes.(Referto"Clean
Radiator/OilCoolerCore"inMaintenanceSection.)
Check compressor
After operating the air conditioner for 5 to 10 minutes,
touch both the high pressure pipe and the low pressure
pipe.
Ifnormal,thehigh-pressuresidepipewillbehot,andthe
low-pressuresidecold.
M107-01-050
NoRefrigerant
Empty
Insufficient
Quantity
Almost clear. A few
bubbles may appear
when the engine
speed is raised or
lowered.
Sufficient
Quantity
2
1
MADB-07-038

Hitachi ZAXIS 30U-5N Specifications

General

Brand	Hitachi
Model	ZAXIS 30U-5N
Category	Excavators
Language	English