Yanmar 4BY - EPA Requirements; Conditions to Ensure Compliance with EPA Emission Standards; Introduction; The Importance of Periodic Maintenance

PERIODIC MAINTENANCE
4-6
BY Service Manual
Introduction
INTRODUCTION
This section of the Service Manual describes the
procedures for proper care and maintenance of the
engine.
The Importance of Periodic
Maintenance
Engine deterioration and wear occur in proportion
to the length of time the engine has been in service
and the conditions the engine is subjected to during
operation. Periodic maintenance prevents
unexpected downtime, reduces the number of
accidents due to poor machine performance and
helps extend the life of the engine.
Performing Periodic Maintenance
Yanmar Replacement Parts
Yanmar recommends that you use genuine Yanmar
parts when replacement parts are needed.
Genuine replacement parts help ensure long
engine life.
Required EPA Maintenance
To maintain optimum engine performance and
compliance with the Environmental Protection
Agency (EPA) Regulation Engines, it is essential
that you follow the Periodic Maintenance Schedule
on page 4-8 and Periodic Maintenance Procedures
on page 4-11.
EPA REQUIREMENTS
The EPA emission regulation is applicable only in
USA.
Conditions to Ensure Compliance
with EPA Emission Standards
This product is an EPA-approved engine.
The following are the conditions that must be met in
order to ensure that the emissions during operation
meet the EPA standards. Be sure to follow these:
The operating conditions should be as follows:
• Ambient temperature: -16° to +40°C
(-3° to 104°F)
• Relative humidity: 80% or lower
• 4BY: Maximum exhaust backpressure: 18.0 kPa
(1835 mmAq) or lower
6BY: Maximum exhaust back pressure: 20.0 kPa
(2039 mmAq) or lower
• Maximum air inlet restriction: 25 mbar
Be sure to perform inspections as outlined in See
Periodic Maintenance Procedures on page 4-11
and keep a record of the results.
A WARNING
EXHAUST HAZARD!
• NEVER operate the engine in an
enclosed area such as a garage,
tunnel, underground room, manhole or
ship’s hold without proper ventilation.
• NEVER block windows, vents, or other
means of ventilation if the engine is
operating in an enclosed area. All
internal combustion engines create
carbon monoxide gas during
operation. Accumulation of this gas
within an enclosure could cause
illness or even death.
• Make sure that all connections are
tightened to specifications after repair
is made to the exhaust system.
• Failure to comply could result in death
or serious injury.
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