TROUBLESHOOTING
11-10
HYDRAULIC SYSTEM
Problem
Cause
Solution
Hydraulic Oil Overheats
Relief valve
See your authorized dealer.
Contaminated oil
Drain oil and refill.
Travel motors
See your authorized dealer.
Improperly adjusted hydraulic
components
See your authorized dealer.
Oil Foams
Air leak in line from reservoir to pump
Repair leak or see your authorized
dealer.
Kinks or dents in oil lines
Check lines.
Wrong oil
Use correct oil.
Water in oil
Change oil.
High or low oil level
Correct level.
Low or No Oil Pressure
Wrong oil
Use correct oil.
Improperly adjusted hydraulic
components
See your authorized dealer.
No oil in system
Fill with correct oil.
Worn cylinder packings
See your authorized dealer.
Relief valve
See your authorized dealer.
No Hydraulic Functions
(Noise from pumps)
Hydraulic pump
See your authorized dealer.
Decreased set-pressure of main relief
valve in control valve
See your authorized dealer.
Lack of hydraulic oil
Add oil.
Damaged suction line or hose
See your authorized dealer.
Clogged suction filter
Clean.
Sucked air from oil suction port
Tighten.
Hydraulic Cylinders Operate
but Cannot Lift Load
Hydraulic pump worn
See your authorized dealer.
Main relief valve pressure low
See your authorized dealer.
Hydraulic oil level low
Add oil.
Suction screen plugged
Clean strainer and system.
Pump suction line leaking
Inspect suction line.
Pressure switches
See your authorized dealer.
Solenoid valve
See your authorized dealer.
Summary of Contents for ZAXIS 450LC-3
Page 1: ...Serial No 020001 and up Hydraulic Excavator PART NO EM1J3 NA1 2 450LC 3 650LC 3 850LC 3 ...
Page 2: ... ...
Page 4: ......
Page 45: ...SAFETY SIGNS S 33 SS 862 SS 863 SS 859 1 2 3 ...
Page 46: ...SAFETY SIGNS S 34 SS3106039 SS3092349 SS 408 4 5 6 ...
Page 48: ...SAFETY SIGNS S 36 SS 024 SS 710 SS3089713 10 11 12 ...
Page 136: ...OPERATOR S STATION 1 88 MEMO ...
Page 138: ...BREAK IN 2 MEMO ...
Page 150: ...OPERATING THE ENGINE 3 12 MEMO ...
Page 270: ...TRANSPORTING 6 78 MEMO ...
Page 406: ...MAINTENANCE 7 136 M1J1 07 083 33 Retighten air compressor mounting bolts ...
Page 408: ...MAINTENANCE 7 138 MEMO ...
Page 410: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 MEMO ...
Page 438: ...SPECIFICATIONS 12 14 MEMO ...
Page 470: ...OPTIONAL ATTACHMENTS AND DEVICES 13 32 MEMO ...
Page 474: ...INDEX 14 MEMO ...