10. TROUBLESHOOTING
10-2-2
Low output
Does the work
implement work
normally?
Hydraulic
power
source
Set relief pressure
of control valve
Excessive
exhaust
resistance
Excessive in-
take resistance
Clogging of
air cleaner
Clogging of
intake pipe
Clogging of
exhaust pipe
Clogging of
exhaust port of
cylinder head
Clogging of
fuel filter
Clogging of
fuel pipe
Clogging of air release port in
fuel tank
Compression leak from
head gasket
Clogging of
muffler
Air in fuel
system
Improper ad-
justment
Fuel injection
pressure
Clogging of fuel
injection nozzle
hole
Sticking of fuel
injection valve
Defective deliv-˜
ery valve
Wear of˜
plunger
barrel
Deterioration or
breakage of
valve spring
Scuffing or
wear of liners
Scuffing or
wear of
piston
Sticking, damage, or
wear of piston ring
Malfunction of
fuel pump rack
Seizing of intake
or exhaust valve
stem
Improper
injection
timing
Defective seat
of intake or
exhaust valve
Insufficient fuel
discharge from
feed pump
Improper clear-
ance of intake
or exhaust valve
Defective lever
link
Defective fuel
system
Governor
Low compres-
sion pressure
Overheating
Refer to Overheating
Clean
Adjust
Adjust
Smooth or
replace seat
Adjust
Adjust
Clean or replace
Clean or replace
Repair or replace
Repair or replace
Repair or replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Release the air
Clean or replace
Clean
Clean
Clean
Clean
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 121: ...6 HYDRAULIC SYSTEM 6 1 7...
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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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