Hydraulic System - Hitachi Zaxis 200LC Operator's Manual

Hydraulic System

Symptom
No Hydraulic Functions
Hydraulic Functions Are Slow or
Have Little or no Power
Power Boost Does Not Work
Hydraulic Oil Overheats
Oil Foams
No Swing Function
Swing Function Is "Jerky"
Miscellaneous—Troubleshooting
Problem
Low hydraulic oil
Pump and valve controller (PVC)
fuse
Clogged suction filter
Low oil level
Cold oil
Wrong oil
Suction screen clogged
Hydraulic tank cap
Fuse
Wrong oil
Clogged radiator or oil cooler
Radiator screen clogged
Clogged filters
Low oil level
Contaminated oil
High or low oil level
Wrong oil
Water in oil
Kinks or dents in oil lines
Pilot control hoses pinched or kinked
Lack of grease
Continued on next page
4-3-9
Solution
Add oil.
Replace fuse.
Clean.
Fill reservoir to full mark.
Push hydraulic warm-up switch.
Use correct oil.
Inspect and clean.
Replace cap.
Check fuse.
Use correct oil.
Clean and straighten fins.
Remove and clean.
Install new filters.
Fill tank to full mark.
Drain oil and refill.
Correct level.
Use correct oil.
Change oil.
Check lines.
Inspect and correct.
Fill with grease
OUT1739,0000257 –19–16JUN06–1/2
081407
PN=195