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SEBU9068-03
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 to
the fan's air flow. Hold the nozzle approximately
6 mm (0.25 inch) away from the radiator fins. Slowly
move the air nozzle in a direction that is parallel with
the radiator tube assembly. 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). Use pressurized
water in order to soften mud. Clean the core from
both sides.
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.
If the radiator is blocked internally, refer to the OEM
Manual for information regarding flushing the cooling
system.
After cleaning the radiator, start the engine. Allow the
engine to operate at low idle speed for three to five
minutes. Accelerate the engine to high idle. This will
help in the removal of debris and the drying of the
core. Slowly reduce the engine speed to low idle and
then stop the engine. Use a light bulb behind the core
in order to inspect the core for cleanliness. Repeat
the cleaning, if necessary.
Inspect the fins for damage. Bent fins may be opened
with a "comb". Inspect these items for good condition:
Welds, mounting brackets, air lines, connections,
clamps and seals. Make repairs, if necessary.
Starting Motor - Inspect
Perkins recommends a scheduled inspection of the
starting motor. If the starting motor fails, the engine
may not start in an emergency situation.
Check the starting motor for correct operation. Check
the electrical connections and clean the electrical
connections. Refer to the Systems Operation, Testing
and Adjusting Manual, "Electric Starting System -
Test" for more information on the checking procedure
and for specifications consult your Perkins dealer or
your Perkins distributor for assistance.
Turbocharger - Inspect
Hot engine components can cause injury from
burns. Before performing maintenance on the en-
gine, allow the engine and the components to
cool.
Turbocharger bearing failures can cause large quan-
tities of oil to enter the air intake and exhaust sys-
tems. Loss of engine lubricant can result in serious
engine damage.
Minor leakage of oil into a turbocharger under ex-
tended low idle operation should not cause problems
as long as a turbocharger bearing failure has not
occurred.
When a turbocharger bearing failure is accompanied
by a significant engine performance loss (exhaust
smoke or engine rpm up at no load), do not continue
engine operation until the turbocharger is renewed.
A visual inspection of the turbocharger can minimize
unscheduled downtime. A visual inspection of the
turbocharger can also reduce the chance for potential
damage to other engine parts. Do not inspect the
engine with the engine in operation.
i07888480
Illustration 70
Typical example
1. Ensure that the turbocharger is clean and free from
dirt before removing components for inspection.
Maintenance Section
Starting Motor - Inspect
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NOTICE
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