Hydraulic System - Hitachi Zaxis 850LC-3 Operator's Manual

D. HYDRAULIC SYSTEM
Parts
1. Check Hydraulic Oil Level
2. Drain Hydraulic Oil Tank Sump
3. Change Hydraulic Oil
4. Suction Filter Cleaning
5. Replace Hydraulic Oil Tank Filter
6. Replace Pump Drain Filter
7. Replace Pilot Oil Filter
8. Replace Air Breather Filter
for leaks
9. Check Hoses
and Lines
for cracks, bend, etc.
NOTE: ✸ Hydraulic oil changing intervals differ according to kind of hydraulic oil used.
See recommended oil chart.
Kind of Lubricant
Where to be applied
Change Interval
Environmental
–20 to 40°C
Temp.
(–4 to 104°F)
Manufacturer
Hitachi
Idemitsu Kosan
British Petroleum
Caltex Oil
Texaco INC.
Chevron U.S.A INC.
Esso
Mobil Oil
Shell Oil
Remarks
NOTE: Use proper hydraulic oil in accordance with the atmospheric temperature.
The machine shipped from the factory is filled with oil marked
When the atmospheric temperature is between -40°C and +20°C: Use the proper hydraulic oil having high and low
temperature characteristics by referring to the values shown below.
Low Temperature Viscosity: Less than 4000cSt at -40°C
High Temperature Viscosity: More than 6.5cSt at +80°C
The above values are approximately equivalent to ISO viscosity grade #22. However, low temperature viscosity will
differ depending on each product. Contact each hydraulic oil manufacture directly.
When the atmospheric temperature is below -40°C: Contact your authorized dealer.
MAINTENANCE
Quantity
1
1
560 L (148.0US gal)
1
1
1
1
1
—
—
6
7
Brand Names of Recommended HydraulicOil
4000 hours
–10 to 40°C
(14 to 104°F) (–4 to 104°F)
Super EX 46HN
10 50 100
1 2 3
4 5
Hydraulic Oil

Hydraulic System

2500 hours
–20 to 40°C –10 to 40°C
(14 to 104°F)
Super Hydro 46 WRHU
Tellus Oil S46
Anti-wear type hydraulic oil
.
7-29
Interval (hours)
250 500 1000 1500 2500 4000
When changing hydraulic oil
1500 hours
–20 to 40°C
(–4 to 104°F)
Bartran HV46
Rando Oil HD46
Rando Oil HD46
Chevron AW46
✸ ✸ ✸
T1JB-01-02-002
–10 to 40°C
(14 to 104°F)
NUTO H46
DTE 25
Tellus Oil 46