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Maintenance Section
Severe Service Application
7. Use standard welding practices to weld the
materials.
Severe Service Application
An engine which operates outside of normal
conditions is operating in a severe service
application.
An engine that operates in a severe service
application may need more frequent maintenance
intervals in order to maximize the following
conditions:
• Reliability
• Service life
Severe service operation can accelerate component
wear. Engines that operate under severe conditions
may need more frequent maintenance intervals in
order to ensure maximum reliability and retention of
full service life.
Due to individual applications, it is not possible to
identify all of the factors which can contribute to
severe service operation. Consult your Perkins
distributor for the unique maintenance that is
necessary for the engine.
The operating environment, incorrect operating
procedures, and incorrect maintenance procedures
can be factors which contribute to a severe service
application.
Severe Environmental Factors
• Frequent operation in dirty air
• Frequent operation at an altitude which is above
1525 m (5000 ft)
• Frequent operation in ambient temperatures which
are above 32° C (90° F)
• Frequent operation in ambient temperatures which
are below 0° C (32° F)
Severe Operating Conditions
• Frequent operation with inlet air which has a
corrosive content
• Operation with inlet air which has a combustible
content
• Operation which is outside of the intended
application
• Operation with a plugged fuel filter
• Extended operation at low idle (more than 20% of
hours)
• Continuous operation at idle or elevated idle
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• Frequent cold starts at temperatures below 0° C
(32° F)
• Frequent cold starts at high altitudes which are
above 1525 m (5000. ft)
• Frequent dry starts (starting after more than 72
hours of shutdown)
• Frequent hot shutdowns (shutting down the
engine without the minimum of 2 minutes to 5
minutes of cool down time)
• Operation above the engine rated speed
• Operation below the peak torque speed
• Operation of the engine above a load factor that
exceeds the rating of the engine
• Operation at light loads for extended periods
• Operating with fuel which does not meet the
standards for distillate diesel fuel as stated in this
Operation and Maintenance Manual, "Fluid
Recommendations".
• Operating with a blend of distillate fuel which
contains more than 20 percent biodiesel
Incorrect Maintenance Procedures
• Extending the maintenance intervals
• Failure to use recommended fuel, lubricants, and
coolant/antifreeze
SEBU9068-03
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