MAINTENANCE
7-17
G. Cooling System
Parts Quantity
Interval (hours)
Page
8 50 100 250 500 1000 2000
1. Check Coolant Level 1 7-94
2. Check and Adjust Fan Belt Tension 1
7-96
3. Change Coolant
ZX135US-6 21 L
Twice a year* 7-98
ZX225USLC-6 28 L
ZX345USLC-6 41 L
4. Clean Radiator, Oil Cooler and Inter
Cooler Core
Outside 1
7-100
Inside 1 Once a year 7-100
5.
Clean Oil Cooler, Radiator and Inter Cooler
Front Screen
1
7-102
6. Clean Air Conditioner Condenser 1
7-102
7. Clean Fuel Oil Cooler 1
7-102
8. Drain Intercooler 1
7-103
: Shorten the maintenance interval when the machine is operated in dusty areas.
: Maintenance required only during first time check.
: If there is a risk of freezing, remove condensate after operating the machine. (only ZX135US-6)
*: When genuine Hitachi Long-Life Coolant is used, change every two years or 4000 operating hours, whichever
comes first.
IMPORTANT:
Use soft water as a coolant. Do not use strong acid or alkaline water. Use the coolant with genuine Hitachi
Long-Life Coolant (LLC) mixed by 30 to 50 %. If a coolant mixed with less than 30 % of Hitachi Long-Life
Coolant is used, service life of the cooling parts may be shortened due to damage by freezing or corrosion of
coolant system parts.
If mineral-rich water is used for coolant, water stain or scale may build up inside the engine or radiator,
causing overheating due to deterioration of coolant performance.
Condensate may accumulate inside the intercooler under some conditions of use. (only ZX135US-6)
Freezing of condensate may cause damage to the intercooler. (only ZX135US-6)
H. Electrical System
Parts Quantity
Interval (hours)
Page
8 50 100 250 500 1000 2000
1. Battery
Check Electrolyte Level 2 Every month 7-107
Check electrolyte specific gravity 2 Every month 7-109
2. Replacing Fuses Replace − As required 7-110
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