Hitachi ZAXIS 30U-5N Operator's Manual page 191

D. Hydraulic System
Parts
1. Check Hydraulic Oil Level
2. Drain Hydraulic Oil Tank Sump
3. Change Hydraulic Oil
4. Clean Suction Filter
5. Replace full-flow filter
Element
6. Replace Pilot Oil Filter Element
7. Check Hoses and Lines
 : Changing interval differs according to the brand of hydraulic oil used, kind of filter element or average attachment
operating availability.
Refer to the "Change Hydraulic Oil" and "Replace Full-Flow Filter Element". See recommended oil chart.
 : Maintenance required only during first time.
E. Fuel System
1. Check Fuel Level
2. Drain Fuel Tank Sump
3. Drain Water Separator
4. Drain Fuel Pre-Filter
5. Replace Fuel Main Filter Element
6. Replace Fuel Pre-Filter Element (ZX50U-5N, 60USB-5N)
7. Check Fuel Hoses
F. Air Cleaner
1. Air Cleaner Outer Element
2. Air Cleaner Inner Element (Optional)
 : Shorten the interval in a dusty work site.
ZX30U-5N, 35U-5N
ZX50U-5N
ZX60USB-5N
Filter-Paper Element
High Performance
Element (Optional)
for leaks, loose
for cracks, bend, etc.
Parts
ZX30U-5N, 35U-5N
ZX50U-5N, 60USB-5N
for leaks, cracks
for cracks, bend, etc.
Parts
Clean
Replace
Replace
MAINTENANCE
Quantity
8 50
1
1
43 L
(11.4 US gal)
66 L
(17.4 US gal)
107.5 L
(28.4 US gal)
1 Each time when hydraulic oil is changed
1
1
1
−
−
Quantity
1
1
1
1
1
1
−
−
Quantity
8
(or when indicator
1
1
1
7-11
Interval (hours)
100 250 500 1000 1500 2000 3000

 
 
Interval (hours)
8 50 100 250
As required
Interval (hours)
50 100 250 500

is lit)
After cleaning 6 times or 1 year
When outer element is replaced
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