PERIODIC MAINTENANCE
YM Series Operation Manual 53
12/05
EPA MAINTENANCE
REQUIREMENTS
To maintain optimum engine performance
and compliance with the Environmental
Protection Agency (EPA) Regulations for
Engines, it is essential to follow the
Periodic Maintenance Schedule on page
55 and the Periodic Maintenance
Procedures on page 59 .
EPA Requirements for USA and
Other Applicable Countries
The following are the requirements for the
EPA. Unless these requirements are met,
the exhaust gas emissions will not be
within the limits specified by the EPA.
The EPA emission regulation is applicable
only in the USA and other countries that
have adopted the EPA requirements in
part or in whole. Determine and follow the
emission regulations in the country where
your engine will be operating to assist you
in specified compliance.
Conditions to Ensure
Compliance with EPA Emission
Standards
The 2YM15, 3YM20 and 3YM30E are
EPA-certified engines.
Note: Since 2013, the 3YM30 does not
comply with the EPA regulation.
The following are the conditions that must
be met in order to ensure that the
emissions during operation meet the EPA
standards:
• Ambient temperature: -20°C to +40°C
(-4°F to +104°F)
• Relative humidity: 80% or lower
The diesel fuel should be:
• ASTM D975 No. 1-D S15 or No. 2-D S15
or equivalent (minimum of cetane No.
40)
The lubricating oil should be:
• Type API, Class CD, CF, CF-4, CI and
CI-4.
Perform the inspections as outlined in
Periodic Maintenance Procedures on page
59 and keep a record of the results.
Pay particular attention to these important
points:
• Replacing the engine oil
• Replacing the engine oil filter
• Replacing the fuel filter
• Cleaning the intake silencer (air cleaner)
Note: Inspections are divided into two
sections in accordance with who
is responsible for performing the
inspection: the user or the
manufacturer.
Inspection and Maintenance
See Inspection and Maintenance of EPA
Emission-Related Parts on page 58 for the
EPA emission-related parts. Inspection
and maintenance procedures not shown in
the Inspection and Maintenance of EPA
Emission-Related Parts section are
covered in Periodic Maintenance Schedule
on page 55
This maintenance must be performed to
keep the emission values of the engine
within the standard values during the
warranty period. The warranty period is
determined by the age of the engine or the
number of hours of operation.
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