4-001
HYDRAULIC SYSTEMS
1. SYSTEM CIRCUIT DIAGRAM
1-1. Graphic Symbols for Hydraulic Circuits
Basic Symbols
DESCRIPTION
SYMBOL
Lines:
Main working
Pilot control
Drain or bleed
Lines, joining
Not connected
Component outline
Arrow indicates direction
of flow.
Line with fixed restriction
(orifice).
Test port, pressure
measurement.
Temperature measure-
ment gauge
Pressure measurement
gauge
Reservoir (vented)
Filter or strainer
Heat exchanger, lines in-
dicate flow of coolant.
Quick disconnect:
Connected with mechan
-
ically opened checks.
Disconnected.
Sloping arrow through a
symbol at 45° indicates
that a component can be
adjusted or varied.
Pump, Motors and Cylinders
DESCRIPTION
SYMBOL
Hydraulic pumps:
Fixed displacement
Unidirectional
Bidirectional
Variable displacement
Unidirectional
Bidirectional
Variable displace-
ment pressure com-
pensated
Unidirectional
Hydraulic Motor:
Unidirectional
Bidirectional
Double acting hydraulic
cylinder
Differential cylinder
Electric motor
Summary of Contents for SV540 Series
Page 1: ...SV540 SHOP MANUAL 3498 6418A 0 ...
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Page 13: ...SAFETY ...
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Page 23: ...SPECIFICATIONS ...
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Page 43: ...ENGINE AND CONTROLS ...
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Page 53: ...HYDRAULIC SYSTEMS ...
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Page 85: ...ELECTRICAL SYSTEM ...
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Page 119: ...VIBRATORY DRUM REAR AXLE ...
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Page 169: ...BRAKE ...
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Page 179: ...INSPECTION AND ADJUSTMENT ...
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Page 207: ...TROUBLESHOOTING ...
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