Hitachi EX1900-5 Operator's Manual page 151

G. COOLING SYSTEM (See Page 7-76)
Parts
Check Coolant Level
1. Coolant
Change Coolant
2. Clean Radiator
3. Clean Radiator Core
4. Clean Intercooler Core
NOTE: ✱ Before leaving the Hitachi factory, the cooling system is filled with a mixture of water and Genuine
Hitachi Long-Life Coolant. As long as Genuine Hitachi Long-Life Coolant is used, the service inter-
vals between changing the coolant is once every two years, or every 4000 hours, whichever comes
first.
H. AIR CONDITIONER (See Page 7-81)
Parts
1. Recirculation Air Filter
2. Ventilation Air Filter
3. Check Refrigerant Quantity
4. Check Compressor Belt Tension
5. Clean Condenser Core
6. Check Tightening Torque
7. Seasonal Maintenance
MAINTENANCE
195 L (51.5 US gal)
Quantity
Cleaning
Replacement
Cleaning
Replacement
Quantity
10
1
Twice a year, in spring and autumn ✱
1
1
2
10 50
3
3
3
3
3
3
3
−
−
Preseason (once a year), Off-season (once a week)
7-19
Interval (hours)
50 250 500 1000 1500 2000
When changing coolant
Interval (hours)
250 500 1000
As required
Replace per 4 cleaning
As required
Replace per 4 cleaning
1500 2000