Yanmar 4TNV98, Service Manual

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4TNV98 & 4TNE98 Diesel Engine Section 1. General Service Information 20
Figure 4-8
2. Remove the radiator cap
(Figure 4-6, (2))
by
turning it counter-clockwise about 1/3 of a turn.
3. Pour the engine coolant slowly into the radiator
until it is even with the lip of the engine coolant
filler port. Make sure that air bubbles do not
develop as you fill the radiator.
4. Reinstall the radiator cap
(Figure 4-6, (2)).
Align
the tabs on the back side of the radiator cap with
the notches on the engine coolant filler port.
Press down and turn the cap clockwise about 1/3
of a turn.
5. Remove the cap on the reserve tank
(Figure 4-6
,
(3)),
and fill it to the LOW (COLD) mark
(Figure
4-6, (4)) with engine coolant. Reinstall the cap.
6. Check the hose
(Figure 4-6, (5))
that connects
the reserve tank
(Figure 4-6, (3))
to the radiator.
Be sure it is securely connected and there are no
cracks or damage. If the hose is damaged, the
engine coolant will leak out instead of going into
the reserve tank.
7. Run the engine until it is at operating temperature.
Check the level of engine coolant in the reserve
tank. When the engine is running and the engine
coolant is at normal temperature, the coolant
level in the tank should be at the FULL (HOT)
mark
(Figure 4-6, (6)).
If the engine coolant is not
at the FULL (HOT) mark
(Figure 4-6, (6)),
add
additional engine coolant to the reserve tank to
bring the level to the FULL (HOT) mark.
Engine Coolant Capacity (Typical)
NOTE:
The capacities listed are for the engineonly
without a radiator. Refer to theoperation manual
provided by the drivenmachine manufacturer for the
actualengine coolant capacity on yourmachine.
The following are the engine coolant capacities for
various Yanmar engines.
Engine Model
Engine Coolant
Capacity
4TNV98 4.4 qt (4.2 L)
4TNE98 4.4 qt (4.2 L)
Specifications
Description of Model Number
When ordering parts or making an inquiry about the
engine you are working on, be sure to include the
complete model and serial numbers as shown on
the engine nameplate. See Location of Labels on
page 8.