Case 580N, 580SN WT, 580SN, 590SN Backhoe Loader Repair Manual

Model: Case 580N, 580SN WT, 580SN and 590SN
Manuals: Service Manual
Introduction
Engine
Four Wheel Drive System
Front Axle
Rear Axle
Hydrostatic Drive
Brakes and Controls
Hydraulic System
Frames and Ballasting
Steering
Wheels
Cab Climate control
Electrical System
Front Loader and Bucket
Booms, dippers and buckets
Platform, Cab, Bodywork and Decals
Special Tool Index
Manual Extract: Hydraulic contamination

All hydraulic systems operate with some contamination. The design of the components in this hydraulic system permits efficient operation with a small amount of contamination. An increase in this amount of contamination can cause problems in the hydraulic system.

The following list includes some of these problems:
Cylinder rod seals that leak
Control valve spools that do not return to neutral
Movement of control valve spools is difficult
Hydraulic oil that becomes too hot
Pump gears, housing, and other parts that wear rapidly • Relief valves or check valves held open by dirt
Quick failure of components that have been repaired • Slow cycle times are slow. The machine does not have enough power.
If your machine has any of these problems, check the hydraulic oil for contamination
Identify the Tier Level of your Equipment (Read our Article on Tier Level )