Oil Inspection; Cooling Water Inspection - Komatsu 4D98 Series Shop Manual

3. Inspection and Adiustemen t
3.1 Oil Inspection
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Standard
The level shall be between the upper and
lower limit lines on the dipstick.
@
The oil shall not be contaminated
heavily and have appropriate viscosity.
No
cooling water or diesel gas oil shall
be mixed.
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Insert the dipstick fully and check the oil
level.
Otherwise, oil may jet out from the
breather or the engine may become
faulty.
3.2 Cooling Water Inspection
l
Standard
Engine: The radiator shall be filled up.
Sub-tank: The water level shall be between
the upper and lower limit lines.
1 4TNE94.98
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4TNE106(T)
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Capa-
city
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0
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The cool.ing water shall be checked
when the engine is cold.
If the water level is normal in the sub-
tank but low in the radiator, check loos-
ened clamping of the rubber hose be-
tween the radiator and sub-tank or tear
in the hose.
Radiator cap
1
3.3 Inspecting Water Leak from Cooling Water System and Radiator
(1) Water leak check in cooling water sys-
tem
Fill cooling water to the normal level in
the radiator, and install the cap tester
on the radiator.
Operate the manual pump to set the
pressure to 0.9M.15 kgf/cm2. If the cap
tester pressure gage reading drops
then, water is leaking from the cooling
water system. Check the water leaking
point.
Cap tester
Water leak check in cooling water system