Page 28
Hydraulic System Troubleshooting, Testing and
Adjustment
Return to Master Table of Contents
TROUBLESHOOTING - TRAVEL CONTROL VALVE
Swing priority not operating
correctly
Sticking spool.
Clean/replace
Solenoid valve faulty.
Replace
Boom and arm cylinders do not
perform normally in combined
operation
Priority valve faulty or spool
sticking.
Check pilot pressure.
Broken or deformed spring.
Replace
Excess clearance between right
and left casing and valve spool.
Clean/replace
Clogged spool passage.
Clean/replace, replace filter.
Relief valve malfunctions:
Pressure does not increase at
all.
Main poppet or pilot poppet
stuck open.
Clean/replace
Irregular or uneven pressure.
Poppet seat damaged or pilot
piston sticking to main poppet.
Clean/replace
Loose lock nut and adjusting
screw.
Readjust
Components worn out, past
wear limits.
Replace
Problem
Possible Causes
Remedies
Secondary pressure does not
increase.
Low primary pressure.
Check primary pressure.
Broken spring.
Replace spring.
Spool sticking.
Clean, repair or replace.
Excess spool to casing
clearance.
Replace spool casing.
Worn or loose universal joint
(handle) subassembly.
Repair or replace U-joint
subassembly.
Secondary pressure too high.
Dirt, other interference between
valve parts.
Clean, repair or replace.
Return line pressure too high.
Redirect return line.
Secondary pressure does not
hold steady.
Dirt, other interference between
valve parts, or worn spool
sticking intermittently.
Clean, repair or replace.
Interference or binding on spool
return spring.
Clean, repair or replace.
Interference, restriction or
unsteady pressure in tank return
line.
Repair or re-route tank return
line.
Air bubbles in piping (temporary)
or air leak.
Vent air, or repair leak.
NOTE:
Look for evidence of leaking oil.
Problem
Possible Causes
Remedies
Содержание Solar 420LC-V
Страница 1: ...Return to Master Table of Contents 1HYDRAULICS...
Страница 31: ...Page 30 Hydraulic System Troubleshooting Testing and Adjustment Return to Master Table of Contents...
Страница 33: ...S0703010K Page 2 Accumulator TABLE OF CONTENTS General Description 3 Specifications 4...
Страница 43: ...S0704090K Page 8 Center Joint Swivel...
Страница 63: ...S0705000 Page 20 Cylinders Return to Master Table of Contents...
Страница 70: ...S0707260 Page 7 Swing Motor...
Страница 74: ...S0707260 Page 11 Swing Motor SPECIAL TOOLS Figure 5...
Страница 91: ...S0707260 Page 28 Swing Motor...
Страница 103: ...S0707365 Page 12 Travel Motor With Gearbox A6V160HD PARTS LIST Travel Motor Figure 12 HTS6331...
Страница 105: ...S0707365 Page 14 Travel Motor With Gearbox A6V160HD Travel Motor Rotary Group Figure 13 HTS6321...
Страница 107: ...S0707365 Page 16 Travel Motor With Gearbox A6V160HD Travel Motor Control HTS6331 Figure 14...
Страница 109: ...S0707365 Page 18 Travel Motor With Gearbox A6V160HD Travel Motor Speed Reduction Gearbox Assembly 3033 Figure 15...
Страница 114: ...S0707365 Page 23 Travel Motor With Gearbox A6V160HD TRAVEL MOTOR DISASSEMBLY SECTIONAL VIEW HTS063S Figure 16...
Страница 136: ...S0707365 Page 45 Travel Motor With Gearbox A6V160HD 29 Remove gasket Figure 91 Figure 91 3061...