S0702170K
Page 27
Hydraulic System Troubleshooting, Testing and
Adjustment
Pressure should stay consistently above 2.5 bar (36 psi). If pressure falls below the
recommended minimum level, forceful acceleration of the swing motor could lead to cavitation
of the circuit and stalling, slowed rotation, noise and possible damage.
2.
If main inlet and outlet pressures were off in the preceding tests in Step 1, adjust swing relief valve
pressure.
Following adjustment, repeat the operating pressure tests (with gauges connected to the inlet and
outlet test ports on top of the swing motor) and check pressures with the swing locks engaged and
released.
If pressure adjustment fails to restore adequate performance, proceed to the Troubleshooting –
Swing table.
3.
If pressure tests were at recommended levels through the main inlet and outlet ports, and through the
“SH” port of the swing brake, the causes of poor swing performance could include a faulty swing
motor, drive train overloading or gearbox defect, or a problem in the brake assembly or swing control
valve. Proceed to the troubleshooting information in the next procedure.
(Models Solar 225LC-V, 300LC-V, and 300LL)
If pressure through the “SH” port was tested below the minimum 13 bar (190 psi) level, check the
shuttle valve in the rear compartment behind cabin. When pressure through the port is at the
recommended level, the brake release valve should disengage the swing brake, allowing the swing
motor to rotate the excavator. If pressure adjustment to the valve has been restored but the brake still
fails to release, the brake piston or friction plate may be frozen, requiring disassembly of the motor
and parts repair/replacement.
(Model Solar 255LC-V)
If pressure through the “SH” port was tested below the minimum 13 bar (190 psi) level, check the
pressure through "PA" port of the control valve. When pressure through the port is at the
recommended level, the brake release valve should disengage the swing brake, allowing the swing
motor to rotate the excavator. If pressure adjustment to the valve has been restored but the brake still
fails to release, the brake piston or friction plate may be frozen, requiring disassembly of the motor
and parts repair/replacement.
4.
If pressure tested at the motor makeup valve falls below recommended minimum level, and
consequent problems with cavitation, stalling and surging are observed, check the restriction valve. If
pressure adjustment to the valve has been restored but if problems with cavitation continues,
disassemble the upper swing motor housing and clean or replace assembly components as required.
NOTE:
If all tested pressures are at or above recommended levels, and there are no mechanical
problems in the drive train or in the motor/brake assembly, the problem will require further
hydraulic troubleshooting. It’s also possible that a defective joystick, an intermittent short in
an electrical control circuit or a problem in the e-EPOS circuit is causing diminished swing
performance. Pull out the e-EPOS indicator panel from underneath the operator’s seat
and perform the self-diagnosis test. If the display panel reads code “0.2,” it is reporting that
the swing priority proportional valve is not functioning, except in the minimum “fail-safe”
mode. Refer to the Electrical section of this book for more information.
Summary of Contents for Solar 225LC-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: ...S0205015K Page 6 Specifications for Solar 225LC V Return to Master Table of Contents ...
Page 70: ...S0205015K Page 22 Specifications for Solar 225LC V Return to Master Table of Contents ...
Page 71: ...1GENERAL MAINTENANCE ...
Page 72: ......
Page 86: ...S0302000 Page 14 General Maintenance Procedures ...
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 165: ...1LOWER STRUCTURE AND CHASSIS ...
Page 166: ......
Page 192: ...S0505030 Page 26 Track Assembly Return to Master Table of Contents ...
Page 193: ...1ENGINE AND DRIVE TRAIN ...
Page 194: ......
Page 205: ...S0605060K Page 11 Air Conditioner Face and Defroster ARS1300L Figure 12 ...
Page 229: ...S0609000 Page 9 Drive Coupling Main Pump Figure 10 DRIVE COUPLING INSTALLATION UCHIDA PUMP ...
Page 234: ...S0609000 Page 14 Drive Coupling Main Pump ...
Page 235: ...1HYDRAULICS ...
Page 236: ......
Page 249: ...S0702170K Page 13 Hydraulic System Troubleshooting Testing and Adjustment ...
Page 272: ...S0702170K Page 36 Hydraulic System Troubleshooting Testing and Adjustment ...
Page 274: ...S0703010K Page 2 Accumulator TABLE OF CONTENTS General Description 3 Specifications 4 ...
Page 297: ...S0705000 Page 9 Cylinders ...
Page 301: ...S0705000 Page 13 Cylinders ...
Page 311: ...S0705000 Page 23 Cylinders ...
Page 315: ...S0705000 Page 27 Cylinders ...
Page 324: ...S0705000 Page 36 Cylinders 17 Force out pin bushing 1 from body of cylinder Figure 28 ...
Page 328: ...S0705000 Page 40 Cylinders ...
Page 335: ...S0707200 Page 7 Swing Motor Return to Master Table of Contents ...
Page 341: ...S0707200 Page 13 Swing Motor Return to Master Table of Contents SPECIAL TOOLS Figure 6 ...
Page 358: ...S0707200 Page 30 Swing Motor Return to Master Table of Contents ...
Page 452: ...S0708320 Page 40 Main Pump With Regulator Return to Master Table of Contents ...
Page 458: ...S0709401K Page 6 Main Control Valve Kayaba Figure 1 ...
Page 459: ...S0709401K Page 7 Main Control Valve Kayaba Figure 2 ...
Page 461: ...S0709401K Page 9 Main Control Valve Kayaba ...
Page 463: ...S0709401K Page 11 Main Control Valve Kayaba Figure 4 ...
Page 475: ...S0709401K Page 23 Main Control Valve Kayaba Figure 16 ...
Page 508: ...S0709401K Page 56 Main Control Valve Kayaba Figure 54 ...
Page 563: ...1ELECTRICAL SYSTEM ...
Page 564: ......
Page 618: ...S0802220K Page 54 Electrical System ...
Page 637: ...S0802220K Page 73 Electrical System ...
Page 649: ...1ATTACHMENTS ...
Page 650: ......
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