Hitachi ZAXIS 135US-5B Operator's Manual page 287

G. Cooling System
1. Check Coolant Level
2. Check and Adjust Fan Belt Tension
3. Change Coolant
4. Clean Radiator, Oil Cooler and Inter Cooler
Core
5. Clean Oil Cooler, Radiator and Inter Cooler Front Screen
6. Clean Air Conditioner Condenser
7. Clean Fuel Oil Cooler
: Shorten the maintenance interval when the machine is operated in dusty areas.
: Maintenance required only during first time check.
*: 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 overheat due to deterioration of coolant performance.
H. Electrical System
1. Battery
2. Replacing Fuses
MAINTENANCE
Parts
ZX135US-5B
ZX225US-5B, 225USLC-5B
Outside
Inside
Parts
Check Electrolyte Level
Check electrolyte specific gravity
Replace
Quantity
8 50
1
1
20 L
25 L
1
1
1
1
1
Quantity
8 50
2
2
−
7-13
Interval (hours)
100 250 500 1000 2000
Twice a year *
Once a year

Interval (hours)
100 250 500 1000 2000
Every month
Every month
As required
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