TROUBLESHOOTING
11-11
HYDRAULIC SYSTEM
Problem
Cause
Solution
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.
Hydraulic pump
See your authorized dealer.
No Hydraulic Functions
(Noise from pumps)
Lack of hydraulic oil
Add oil.
Damaged suction line or hose
See your authorized dealer.
Clogged suction filter
Clean.
Hydraulic pump worn
See your authorized dealer.
Hydraulic Cylinders Operate
but Cannot Lift Load
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.
Summary of Contents for EX1900-5
Page 1: ......
Page 37: ...SAFETY SIGNS S 29 SS 411 SS 691 SS 442 M18C 01 006 SS 445 M144 07 107 ...
Page 38: ...SAFETY SIGNS S 30 SS 446 SS 723 SS3076117 SS 723 SS 410 SS 723 Loading Shovel ...
Page 39: ...SAFETY SIGNS S 31 SS3091476 M146 01 035 ...
Page 40: ...SAFETY SIGNS S 32 SS 413 M18C 01 007 M18C 01 008 ...
Page 42: ...SAFETY SIGNS S 34 MEMO ...
Page 112: ...DRIVING THE MACHINE 4 12 MEMO ...
Page 140: ...MAINTENANCE 7 8 MEMO ...
Page 146: ...MAINTENANCE 7 14 Hoses Q ty in Use Transmission Oil Cooler Hose 5 2 M18C 07 062 5 ...
Page 156: ...MAINTENANCE 7 24 4 Grouped Grease Fittings 7 Arm Ñ Lubrication M144 07 079 M144 07 005 7 ...
Page 258: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...
Page 274: ...TROUBLESHOOTING 11 14 MEMO ...
Page 278: ...SPECIFICATIONS 12 4 MEMO ...