Check Refrigerant; Replace Air Conditioner Receiver Dryer; Check Compressor And Pulley - Hitachi ZW 310-6 Operator's Manual

Check Refrigerant

--- every 6 months
1. Start the engine and run at approximately 1500 min
(rpm).
2. 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 (65 °F) on the monitor
screen).
3. Operate the air conditioner 2 to 3 minutes.
Check if cool air comes out from the vent in the cab.
4. In case any abnormality is found in the air
conditioner, consult your nearest authorized dealer
to check receiver dryer (1).

Replace Air Conditioner Receiver Dryer

--- every 6000 hours or three years
IMPORTANT: Do not release refrigerant into the
atmosphere as this is illegal. Comply with
refrigerant regulations.
Before charging refrigerant, all the refrigerant must
be recovered from the system. Consult your nearest
authorized dealer to replace receiver dryer (1) or to charge
the refrigerant.
f
NOTE: This machine uses refrigerant R134a.
Type Refrigerant No.
HFC R134a

Check Compressor and Pulley

--- once a year
Check the compressor and its vicinity for abnormality in
operation, oil, or refrigerant leakage.
Check the pulley for abnormal noise.
Check Compressor
After operating the air conditioner for 5 to 10 minutes,
check temperature at both the high pressure pipe and
the low pressure pipe.
Normally, the high pressure pipe must be hot and the
low pressure pipe must be cool.
MAINTENANCE
-1
Quantity kg
0.90 ± 0.05
7-103
90Z7B-7-104-1
1
90Z7-OM0144
90Z7B-7-104-2