Yanmar 4TNV98 Service Manual page 57

Change the engine oil every 250 hours of operation
after the initial change at 50 hours. Replace the
engine oil filter at the same time. See Replace
Engine Oil and Engine Oil Filter on page 45.
Replace Air Cleaner Element
The maximum air intake restriction, in terms of
differential pressure measurement, must not
exceed 0.90 psi (6.23 kPa; 635 mmAq). Clean or
replace the air cleaner element if the air intake
restriction exceeds the above mentioned value.
Replace the air cleaner element (Figure 5-12, (2))
every 500 hours even if it is not damaged or dirty.
When replacing the element, clean the inside of the
air cleaner case (Figure 5-12, (4)).
If the air cleaner is equipped with a double element,
only remove and replace the inner element (Figure
5-13, (1)) if the engine lacks power or the dust
indicator actuates (if equipped). This is in addition
to replacing the outer element.
Replace Fuel Filter
FIRE AND EXPLOSION HAZARD!
Diesel fuel is flammable and explosive under
certain conditions.
When you remove any fuel system component
to perform maintenance (such as changing the
fuel filter) place an approved container under
the opening to catch the fuel.
NEVER use a shop rag to catch the fuel. Vapors
from the rag are flammable and explosive.
Wipe up any spills immediately.
Wear eye protection. The fuel system is under
pressure and fuel could spray out when you
remove any fuel system component.
Failure to comply will result in death or serious
injury.
4TNV98 & 4TNE98 Diesel Engine
CAUTION
DANGER
For maximum engine life, Yanmar recommends
that when shutting the engine down, you allow
the engine to idle, without load, for five minutes.
This will allow the engine components that
operate at high temperatures, such as the
turbocharger (if equipped) and exhaust system,
to cool slightly before the engine itself is shut
down.
ALWAYS be environmentally responsible.
Follow the guidelines of the EPA or other
governmental agencies for the proper disposal
of hazardous materials such as engine oil,
diesel fuel and engine coolant. Consult the local
authorities or reclamation facility.
NEVER dispose
irresponsibly by dumping them into a sewer, on
the ground, or into ground water or waterways.
Failure to follow
seriously harm the environment.
4TNV98 & 4TNE98 (for D25G) Only
Replace the fuel filter at specified intervals to
prevent contaminants from adversely affecting the
diesel fuel flow.
1. Stop the engine and allow it to cool.
2. Close the fuel cock of the fuel filter / water
separator.
3. Remove the fuel filter with a filter wrench, turning
it to the left (Figure 5-14, (1)). When removing
the fuel filter, carefully hold it to prevent the fuel
from spilling. Wipe up all spilled fuel.
Section 2. Periodic Maintenance
55
CAUTION
CAUTION
of hazardous materials
these procedures may