4. ENGINE
4-2-10
4-2-6 Adjusting the Maximum (or Minimum) Idling Speed
(1) First warm up the engine. Then, gradually increase the
engine speed up to the maximum idling speed. (Refer to
Section "2-1 Specifications".)
(2) If the maximum idling speed differs from the specified one,
adjust the maximum idling speed using the maximum
idling speed adjusting bolt.
(3) Set the minimum idling speed to the specified value,
(Refer to Section "2-1 Specifications".) by turning the mini-
mum idling speed adjusting bolt.
Note :
The illustration shows the partial perspective view of the gover-
nor for the direct injection system.
4-2-7 Checking the Cooling Water System and Radiator for Water Leakage
1) Checking the Cooling Water System for Water Leakage
Note :
The cooling water system can be checked effectively while the
engine is warm.
(1) Supply cooling water up to the normal water level in the
radiator. Attach the cap tester body to the radiator.
(2) Start operating the cooling water pump, and set the pres-
sure of the tester to 0.075 to 0.105
MPa.
Any lower reading of the pressure gauge on the cap
tester
indicates water leakage from the cooling water sys-tem.
Then, find out the portion of the cooling water system
from
which cooling water leaks.
2) Checking the Radiator Cap
Attach the radiator cap to a cap tester. Set the pressure of the
tester to 0.075 to 0.105 MPa.
Check if the
cap is opened at the set pressure. If not,
replace the cap,
because it is defective.
Maximum idling speed adjusting bolt
Minimum idling speed
Decrease
Increase
Decrease
Increase
adjusting bolt
Regulator handle
Checking the cooling water system
for water leakage
(
)
Cap tester
(Checking the radiator cap)
Radiator cap
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 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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