Yanmar 3YM20, Operation Manual

Page: 47 / 56

4. MAINTENANCE AND INSPECTION
47
EN
Even if LLC (Long Life Coolant) or an-
tirust is added, the cooling water must
be replaced periodically because the
properties of the agent will degener-
ate.
To drain the fresh water/coolant, open
the fresh water cocks/plugs (two plac-
es) as shown in 3.2.4 and 3.4(2).
(Refer to 3.2.4 for resupplying cooling
water.)
4.4 EPA Requirements
4.4.1 EPA Certification Plate
This engine has the following EPA Certifi-
cation Plate attached:
4.4.2 Conditions to Insure Compli-
ance with Emission Standards
This product is an EPA approved engine.
The following are the conditions that must
be met in order to insure that the emission
during operation meets the EPA stan-
dards.
Be sure to follow these.
(1) The operating conditions should be
as follows:
1. Ambient temperature: -20 – 40
°
C
2. Relative humidity: 80% or lower
3. Permissible value for intake negative
pressure: 3.9 kPa (400 mmAq) or low-
er
4. Permissible value for exhaust back
pressure: 14.7 kPa (1500 mmAq) or
lower
(2) The fuel and lubricating oil used
should be as follows:
1. Fuel: The diesel fuel oil ISO 8217
DMX, BS 2869 A1 or A2 (Cetane No.
45 minimally.)
2. Lubricating oil: Type API, class CD
(3) Do not remove the seals limiting
the amount of fuel injected and the
engine speed.
(4) Be sure to carry out inspections.
Follow the basic guidelines outlined in
4.3 (Periodic Inspection Items) of this
manual and keep a record of the re-
sults. Pay particular attention to these
important points: replacing the lubri-
cating oil, lubricating oil filter, the fuel
filter and cleaning the intake silencer
element.
Note: Inspections are divided into two sec-
tions in accordance with whom is in charge
of carrying out the inspection: (the User) and
(the Maker).
A Attachment Position for Certification Plate
(attached to the top of the rocker arm cover)
)
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