S0702170K
Page 30
Hydraulic System Troubleshooting, Testing and
Adjustment
TROUBLESHOOTING – HYDRAULIC PROBLEMS
Problem
Possible Causes
Remedies
Attachment cylinders, swing and
travel motors are all inoperable.
Loud noises are heard from
main pump assembly.
Main pump(s) malfunction.
Repair or replace.
Low oil level in hydraulic system.
Refill.
Main pump inlet (oil supply)
piping or hose damaged.
Repair or replace.
Attachment cylinders, swing and
travel motors are all inoperable.
No usual or loud noises can be
heard.
Pilot pump malfunction.
Repair or replace.
Pilot cutoff solenoid stuck.
Repair or replace.
Pilot cutoff switch faulty.
Repair or replace.
Engine/pump flex coupling
damaged.
Replace flex coupling.
Sluggish performance of all
hydraulic functions –
attachment, swing and travel.
Main pump(s) damaged or worn.
Repair or replace.
Main relief valve pressure off.
Readjust pressure.
Low oil level in hydraulic system.
Refill.
Hydraulic reservoir intake
strainer clogged.
Clean.
Pump inlet (supply side) piping
or hose allowing air into
hydraulic system.
Tighten connection.
Oil temperature abnormally
high.
Oil cooler clogged or air
circulation to cooler blocked.
Clean.
Cooling fan belt tension too
loose.
Readjust belt tension.
Relief valve set too low.
Readjust valve.
Relief valve in constant use.
Reduce or slow work load or
cycling rate.
Hydraulic oil severely neglected
or incorrect for application.
Replace oil.
One circuit in hydraulic system
inoperable.
Overload relief valve
malfunction.
Readjust or replace.
Oil leak at make-up valve.
Clean, repair.
Control valve spool damaged.
Repair or replace.
Dirt in control valve spool.
Clean or replace.
Actuator (joystick, foot pedal)
damaged or worn.
Repair or replace.
Internal seal leak in cylinder.
Repair or replace.
Cylinder rod damaged.
Repair or replace.
Pilot valve or piping malfunction.
Repair or replace.
Mechanical linkage frozen, loose
or damaged.
Repair or replace.
Travel motors inoperable.
Center joint damaged.
Repair or replace.
Parking brake not releasing.
Repair or replace.
Travel motor worn or damaged.
Repair or replace.
Travel motor pilot piping
damaged.
Repair or replace.
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: ......
Page 670: ......