RENR7377-01
16 Page, B/W
Ecomate Attachment
RENR7377-01
June 2005
345B Series II Excavators
Hydraulic System
CCC1-UP
©
2005 Caterpillar
All Rights Reserved
Printed in U.S.A.
ONE POSITION
TWO POSITION
THREE POSITION
VENTED
PRESSURIZED
RETURN ABOVE FLUID LEVEL
RETURN BELOW FLUID LEVEL
LINES CROSSING
LINES JOINING
TWO-WAY
THREE-WAY
FOUR-WAY
SPRING
CONTROL VALVES
RESTRICTION
LINE RESTRICTION
(FIXED)
2-SECTION PUMP
MAIN
AUX.
SPRING
(ADJUSTABLE)
VARIABILITY
LINE RESTRICTION
(VARIABLE)
LINE RESTRICTION
VARIABLE and PRESSURE
COMPENSATED
PRESSURE
COMPENSATION
PUMP: VARIABLE and
PRESSURE COMPENSATED
ENERGY TRIANGLES
HYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE
TEMPERATURE
FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES
VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONER
PUMP or MOTOR
FLUID POWER SYMBOLS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
COMPLETE
INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED
GAS CHARGED
SOLENOID
or MANUAL
SOLENOID
and PILOT
SOLENOID and
PILOT or MANUAL
COMBINATION CONTROLS
SOLENOID
SERVO
THERMAL
DETENT
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTING
SINGLE ACTING
BASIC
SYMBOL
SPRING
LOADED
CHECK VALVES
TWO
POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
THREE
POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
AB
PT
AB
PT
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
RENR7377-01
16 Page, B/W
ATTACHMENT COMPONENTS
Item
No.
Description
1 Left Swing Motor
2 Right Swing Motor
3 Left Travel Motor
4 Right Travel Motor
5 Boom Cylinders
6 Boom Load Control Valve
7 Stick Cylinder
8 Left Travel Brake Valve
9 Right Travel Brake Valve
10 Bucket Cylinder
11 Swing Priority Valve
12 Rob Side Valve
13 Stick Drift Reduction Valve
14 Swivel
15 Pressure Switch (Implement or Swing)
16 Travel Pressure Switch
17 Main Control Valve
18 Ecomate Pilot Oil Manifold
19 Pilot Control Valve
20 Main Relief Valve
21 Pilot Control Valve (Swing or Stick)
22 Pilot Oil Filter
23 Booster Valve
24 Accumulators (High Pressure)
25 Accumulator Valve
26 Control Valve (Accumulator)
27 Hydraulic Activation Control Valve
28 Drain Filter
29 Bypass Check Valve
30 Solenoid Valve (Fine Control)
31 Solenoid Valve (Travel Speed)
32 Solenoid Valve (Swing)
33 Accumulator (Pilot)
34 Upper Pump
35 Lower Pump
36 Pressure Sensor (Travel Speed)
37 Accumulator (Low Pressure)
38 Slow Return Check Valve
39 Hydraulic Oil Cooler
40 Fan Motor
41 Return Filter
42 Pressure Sensor (Boom Up)
43 Pressure Sensor (Boom Down)
44 Pilot Pump
45 Gear Pump (Fan Motor)
46 Feeding Pump
47 Relief Valve (Fan Pump)
48 Hydraulic Tank
49 Proportional Reducing Valve
50 Relief Valve
51 Standard Pilot Oil Manifold
52 Transfer Pump
53 PilotReliefValve
54 Boom Float Valve
g01043507
32
33
31
30
5150
49
48
47
41
40
39
38
28
29
26
21
19
1
7
2
3
8
13
14
4
6
10
9
1615
17
20
5
11
12
18
24
25
37
36
23
44
54
52
53
42
43
27
22
34
35
45
46
System Pressure
Pilot
Return
Drain
Main Hydraulic Schematic
