S0702170K
Page 7
Hydraulic System Troubleshooting, Testing and
Adjustment
ARM OPERATING CIRCUIT
The arm operating circuit includes both the right and left hydraulic main pumps, the right and left halves of
the control valve, a slow return orifice, and the arm cylinder. The circuit can be operated in the two-stage
speed control mode which works through both halves of the control valve and doubles the volume of oil
flowing to the cylinder.
Overload relief valves set at 360 kg/cm
2
(5,112 psi) have been installed at the AM 1 and AMD 1 ports on
the right side of the control valve to protect the circuit and system components from possible damage
caused by shocks and/or overload pressure. Additional protection - to prevent cavitation of the cylinder - is
provided by a make-up valve and reservoir return circuit, which ensures that the volume of oil going to the
cylinder will not exceed the volume of oil coming out.
ARM CROWD CIRCUIT
When the arm control lever is put in the crowd
mode, the left side pilot valve generates
secondary pressure that is transmitted to the
AM1 and AM2 spools of the control valve
simultaneously.
When secondary pilot pressure reaches 7 - 9
kg/cm
2
(100 - 130 psi), the arm control valve
spools AM1 and AM2 open. Output flow from
both halves of the pump assembly is directed to
the arm cylinder.
When working in the arm crowd mode, under
certain conditions, oil in the arm cylinder could
suddenly be forced out by the weight of the arm
and bucket. Insufficient oil flow to the cylinder
could lead to cavitation in the cylinder and/or
surging or irregular movement. This is prevented
by a regeneration valve attached to the control
valve which maintains the balance between oil
flowing into the cylinder and oil flowing out.
ARM DUMP CIRCUIT
When the arm control lever is put in "dump"
mode, the left side pilot valve generates
secondary pilot pressure that goes to both
spools AM1 and AM2 of the control valve
simultaneously.
When pilot pressure reaches 7 - 9 kg/cm
2
(100 -
130 psi), the control spools open, allowing oil
from PUMP(L) and PUMP(R) to flow to the arm
cylinder.
PUMP(L)
PUMP(R)
PL
PR
TL
CONTROL
VALVE(L)
ARM
CYLINDER
CONTROL
VALVE(R)
AMD1
AM1
REGENERATION VALVE
AM2
ARS1580L
PILOT VALVE
Figure 4
PUMP(L)
PUMP(R)
TL
PR
AM2
PL
CONTROL
VALVE(L)
ARM
CYLINDER
CONTROL
VALVE(R)
AMD1
ARS1590L
AMD2
PILOT VALVE
AM1
Figure 5
Summary of Contents for Solar 300LC-V
Page 2: ......
Page 4: ......
Page 7: ...1SAFETY...
Page 8: ......
Page 46: ...S0102000 Page 38 Track Excavator Safety...
Page 47: ...1SPECIFICATIONS...
Page 48: ......
Page 54: ...S0202080K Page 6 Specifications for Solar 300LC V...
Page 70: ...S0202080K Page 22 Specifications for Solar 300LC V...
Page 71: ...1GENERAL MAINTENANCE...
Page 72: ......
Page 86: ...S0302000 Page 14 General Maintenance Procedures Return to Master Table of Contents...
Page 99: ...1UPPER STRUCTURE...
Page 100: ......
Page 102: ...S0402040K Page 2 Cab TABLE OF CONTENTS Removal 3 Installation 6...
Page 116: ...S0403050K Page 8 Counterweight Return to Master Table of Contents...
Page 140: ...S0407000 Page 6 Swing Bearing...
Page 164: ...S0408070K Page 24 Swing Reduction Gear...
Page 165: ...1LOWER STRUCTURE AND CHASSIS...
Page 166: ......
Page 190: ...S0505000 Page 24 Track Assembly 7 Tighten plug 1 Figure 48 Figure 48...
Page 191: ...S0505000 Page 25 Track Assembly TRACK SPRING AND TRACK ADJUSTING CYLINDER PARTS LIST Figure 49...
Page 193: ...1ENGINE AND DRIVE TRAIN...
Page 194: ......
Page 205: ...S0605060K Page 11 Air Conditioner Face and Defroster ARS1300L Figure 12...
Page 220: ...S0605060K Page 26 Air Conditioner...
Page 229: ...1HYDRAULICS...
Page 230: ......
Page 262: ...S0703010K Page 2 Accumulator TABLE OF CONTENTS General Description 3 Specifications 4...
Page 266: ...S0703010K Page 6 Accumulator...
Page 274: ...S0704080K Page 8 Center Joint Swivel...
Page 283: ...S0705000 Page 9 Cylinders...
Page 287: ...S0705000 Page 13 Cylinders...
Page 291: ...S0705000 Page 17 Cylinders...
Page 299: ...S0705000 Page 25 Cylinders...
Page 308: ...S0705000 Page 34 Cylinders 17 Force out pin bushing 1 from body of cylinder Figure 28...
Page 312: ...S0705000 Page 38 Cylinders...
Page 324: ...S0707270K Page 12 Swing Motor Toshiba MFC200 PARTS LIST Figure 6...
Page 355: ...S0707315K Page 11 Travel Motor with Gearbox...
Page 424: ...S0708315K Page 28 Main Pump Kawasaki CONSTRUCTION OF REGULATOR Figure 22...
Page 444: ...S0708315K Page 48 Main Pump Kawasaki...
Page 450: ...S0709401K Page 6 Main Control Valve Kayaba Figure 1...
Page 451: ...S0709401K Page 7 Main Control Valve Kayaba Figure 2...
Page 453: ...S0709401K Page 9 Main Control Valve Kayaba...
Page 455: ...S0709401K Page 11 Main Control Valve Kayaba Figure 4...
Page 467: ...S0709401K Page 23 Main Control Valve Kayaba Figure 16...
Page 500: ...S0709401K Page 56 Main Control Valve Kayaba Figure 54...
Page 552: ...S0792160K Page 6 Hydraulic Schematic S300LC V...
Page 553: ...1ELECTRICAL SYSTEM...
Page 554: ......
Page 608: ...S0802220K Page 54 Electrical System...
Page 627: ...S0802220K Page 73 Electrical System...
Page 634: ...S0892160K Page 4 Electrical Schematic S300LC V SOLAR 300LC V Figure 2...
Page 636: ...S0892160K Page 6 Electrical Schematic S300LC V...
Page 637: ...1ATTACHMENTS...
Page 638: ......
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