10. TROUBLESHOOTING
10-2-11
Boom swing cannot be made or is slow
Control valve
Controls
Hydraulic
source
Do other work implements
work normally?
Internal
leakage
Hydraulic cylinder
Oil leak
Boom swing
pedal
Circuit relief
valve pressure
Dust in circuit relief
valve
Sticking of swing
pedal link
Wear of
link joint
Replace seal or
whole assembly
Adjust neutral
position
Adjust lever stroke.
Replace spool section
Repair pedal link or apply grease
Replace bush
Repair or replace
Clean or replace
Replace
Permanent set of circuit relief
valve seat surface
Replace circuit relief valve
Check the pressure
and adjust it. Refer
to section 5-4 "Pres-
sure Adjustment"
Malfunction
of spool
Fall or wear of
spool link pin
Install or replace
Summary of Contents for ViO12-2A
Page 1: ...SERVICE MANUAL EXCAVATOR ViO12 2A...
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Page 109: ...5 3 1 5 ELECTRIC SYSTEM 5 3 Wiring Diagram...
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Page 117: ...6 HYDRAULIC SYSTEM 6 1 3...
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Page 123: ...6 HYDRAULIC SYSTEM 6 2 1 6 2 Hydraulic Circuit Schematic...
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Page 219: ...6 HYDRAULIC SYSTEM 6 7 8 1 4 3 8 7 12 10 10 15 a b c Loctite 262 0 30Nm 0 45Nm...
Page 348: ...7 ADJUSTMENT AND REPAIR 7 5 31 6 Control Levers Pilot valves Control valve...
Page 349: ...7 ADJUSTMENT AND REPAIR 7 5 32 7 Upperstructure Implement Bucket cylinder Arm cylinder...
Page 351: ...7 ADJUSTMENT AND REPAIR 7 5 34 9 Undercarriage High speed travel solenoid valve...
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Page 360: ...CHAPTER 8 PERIODIC INSPECTION AND SERVICING 8 1 List of Periodic Inspection and Servicing 8 1...
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Page 364: ...CHAPTER 9 FUEL LUBE OIL AND GREASE RECOMMENDED 9 Fuel Lube Oil and Grease Recommended 9 1...
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Page 406: ...CHAPTER 11 REFERENCE DATA 11 1 Specifications for Attachment 11 1...
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