Hitachi Zaxis 33U-5A Operator's Manual page 180

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. Check Water Separator
3. Drain Fuel Tank Sump
4. Replace Fuel Main Filter Element
5. Replace Fuel Pre-Filter Element (Optional)
6. 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.
ZX33U-5A, 38U-5A
ZX48U-5A, 55U-5A
ZX65USB-5A
Filter-Paper Element
High Performance
Element (Optional)
for leaks, loose
for cracks, bend, etc.
Parts
for leaks, cracks
for cracks, bend, etc.
Parts
Clean
Replace
Replace
MAINTENANCE
Quantity
8 50
1
1
43 L
(13.2 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
−
−
Quantity
8
(or when indicator
1
1
1
7-12
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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