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SEBU8430-02
• Inspection of all the parts that are visible during
the disassembly
• Replacement of the seals and gaskets that are
removed
• Cleaning of the internal passages of the engine
and the engine block
It is not practical to wait until the engine exhibits
symptoms of excessive wear or failure. It is not less
costly to wait. A planned overhaul before failure may
be the best value for the following reasons:
• Costly unplanned downtime can be avoided.
• Many original parts can be reused according to the
guidelines for reusable parts.
• The service life of the engine can be extended
without the risk of a major catastrophe due to
engine failure.
• Achieve the best cost/value relationship per hour
of extended service life.
Overhaul Intervals
Top end overhauls are determined by the recession
of the valves. In-frame overhauls are determined by
the following conditions:
• An increase of oil consumption
• An increase of crankcase blowby
• A decrease or a variation of cylinder compression
• A reduction in the detonation margin
• An increase in the throttle position
Major overhauls are determined by the in-frame
tests, and by results of oil analysis.
Some other factors that are important for determining
the overhaul intervals include the following
considerations:
• Performance of preventive maintenance
• Use of recommended lubricants
• Use of recommended coolants
• Use of recommended fuels
• Operating conditions
• Operation within acceptable limits
• Engine load
• Engine speed
Overhaul Inspection
If the parts are not within the inspection
specifications, the parts should be replaced. The use
of parts that are not in wear limits could result in
unscheduled downtime and/or costly repairs. This
can also contribute to increased fuel consumption
and reduction of engine efficiency.
Your Perkins dealer can provide the parts that are
needed to rebuild the engine at the least possible
cost.
Overhaul recommendation
Perkins recommends a scheduled overhaul in order
to minimize downtime. A scheduled overhaul will
provide the lowest cost and the greatest value.
Schedule an overhaul with your Perkins dealer.
Radiator - Clean
Note: Adjust the frequency of cleaning according to
the effects of the operating environment.
Inspect the radiator for these items: damaged fins,
corrosion, dirt, grease, insects, leaves, oil and other
debris. Clean the radiator, if necessary.
Personal injury can result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a
protective face shield and protective clothing.
Maximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
Pressurized air is the preferred method for removing
loose debris. Direct the air in the opposite direction of
the fan's air flow. Hold the nozzle approximately
6 mm (0.25 inch) away from the fins. Slowly move
the air nozzle in a direction that is parallel with the
tubes. This will remove debris that is between the
tubes.
Pressurized water may also be used for cleaning.
The maximum water pressure for cleaning purposes
must be less than 275 kPa (40 psi). In order to clean
a radiator with dual cores, one core will need to be
removed from the radiator. This will allow access to
both sides of the core.
Use a degreaser and steam for removal of oil and
grease. Clean both sides of the core. Wash the core
with detergent and hot water. Thoroughly rinse the
core with clean water.
75
Maintenance Section
Radiator - Clean
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