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Section E
3 - 13
Introduction to Hydraulic Schematic
Symbols (cont'd)
Control Mechanisms
Rotating shaft-one direction
Rotating shaft-two directions
Detent
Locking device
Over centre device
Simple linkage
General control
Push button operated
Lever operated
Pedal operated
Stem operated
Spring operated
Roller operated
Roller trip operated
(one directional)
9803/3280
Hydraulics
Basic System Operation
S189730
Purchased from www.WorkshopManuals.co.uk
Solenoid one winding
Solenoid two winding
M
Electric motor operated
Internal pressure
pilot operated
External pressure
pilot operated
Pressure operated
spring release
Pilot operated by solenoid
pilot valve
Pilot operated by a solenoid
or separate pilot valve
Pressure gauge
Pressure switch
Section E
3 - 13
S189740
Issue 1
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