SEBU8605-01 107
Maintenance Section
Radiator - Clean
i04245214
Radiator - Clean
The radiator i
s not usually supplied by Perkins. The
following text describes a typical cleaning procedure
for the radiator. Refer to the OEM information for
further info
rmation on cleaning the radiator.
Note: Some application will require a fuel cooler
to be instal
led. The fuel cooler is a type of radiator
that uses air to cool the fuel and the fuel cooler will
require cleaning.
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. C
lean the radiator, if necessary.
Personal injury can result from air pressure.
Persona
l injury can result without following prop-
er procedure. When using pressure air, wear a pro-
tective 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
fans air fl ow. 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 r
adiator tube assembly. The pressurized air will
remove debris that is between the tubes.
Pres
surized water may also be used for cleaning.
The maximum water pressure for cleaning purposes
must be less than 275 kPa (40 psi). Use pressurized
wat
er 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
co
re with clean water.
If the radiator is blocked internally, refer to the OEM
Ma
nual for information regarding flushing the cooling
system.
After cleaning
the radiator, start the engine. Allow
theenginetooperateatlowidlespeedfor3to5
minutes. Accelerate the engine to high idle. The high
idle speed wil
l 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
bulbbehindt
he 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.
i03639888
Radiator Pressure Cap -
Clean/Replace
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
NOTICE
When any servicing or repair of the engine cooling
syste
m is performed the procedure must be performed
with the engine on level ground. This will allow you to
accurately check the coolant level. This will also help
in av
oiding the risk of introducing an air lock into the
coolant system.
1. Stop
the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly in
order to relieve any pressure. Remove the radiator
pre
ssure cap.
2. Check coolant level. Refer to Operation and
Mai
ntenance Manual, “Cooling System Coolant
Level - Check”.
3. In
stall new radiator pressure cap.
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