Yanmar 2TNV70, Operation Manual

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PERIODIC MAINTENANCE
78
TNV Operation Manual
Figure 3
7. Recheck the engine oil level.
8. Add engine oil (Figure 3, (5)) as needed until
the level is between the upper (Figure 3, (2))
and lower lines (Figure 3, (3)) shown on the
dipstick (Figure 3, (1)) .
9. Reinstall the oil filler cap (Figure 3, (4)) . If any
engine oil is spilled, wipe it away with a clean
cloth.
Check and Adjust Cooling Fan V-belt
The V-belt will slip if it does not have the proper
tension. This will prevent the alternator from
generating sufficient power. Also, the engine will
overheat due to the engine coolant pump pulley
slipping.
Check and adjust the V-belt tension (deflection)
as follows:
1. Press the V-belt down with your thumb with a
force of approximately 22 ft lbs (98 N•m,10
kgf) to check the deflection.
There are three positions to check for V-belt
tension
(Figure 4, (A), (B) and (C)) . You can
check the tension at whichever position is the
most accessible. The proper deflection of a
used V-belt at each position is:
Note: A “Used V-belt” refers to a V-belt which
has been used on a running engine for
5 minutes or more.
(4)
(5)
(1)
(2)
(3)
0000587A
(4)
0000007B
(4)
(3)
(1)
(2)
(4)
(5)
Used V-belt Tension
A B C
3/8 ~1/2 in
(10~14 mm)
1/4 ~3/8 in
(7~10 mm)
5/16 ~1/2 in
(9~13 mm)