SEBU8121 77
Maintenance Section
Radiator - Clean
Each installat
ion application can be different. The
differences depend on the following factors:
•
Type of hose
•
Type of fitting material
•
Anticipated expansion and contraction of the hose
•
Anticipated e
xpansion and contraction of the
fittings
Replace the Hoses and the Clamps
Refer to the OE
M information for further information
on removing and replacing fuel hoses (if equipped).
The coolant sy
stem and the hoses for the coolant
system are not usually supplied by Perkins. The
following text describes a typical method of replacing
coolant hose
s. Refer to the OEM information for
further information on the coolant system and the
hoses for the coolant system.
Pressurize
d 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 c ooling system
pressure cap slowly in order to re lieve the pres-
sure.
1. Stop the engine. Allow the engine to cool.
2. Loosen the
cooling system filler cap slowly in
order to relieve any pressure. Remove the cooling
system filler cap.
Note: Drain the coolant into a suitable, clean
container. The coolant can be reused.
3. Drain the coolant from the cooling system to a
level that is below the hose that is being replaced.
4. Remove the hose clamps.
5. Disconne
ct the old hose.
6. Replace the old hose with a new hose.
7. Install the hose clamps with a torque wrench.
Note: For
the correct coolant, see this Operation and
Maintenance Manual, “Fluid Recommendations”.
8. Refill th
e cooling system. Refer to the OEM
information for further information on refilling the
cooling system.
9. Clean the cooli
ng system filler cap. Inspect the
cooling system filler cap’s seals. Replace the
cooling system filler cap if the seals are damaged.
Install the co
oling system filler cap.
10. Start the engine. Inspect the cooling system for
leaks.
i01907732
Radiator - Cl
ean
The radiator is not usually supplied by Perkins. The
following text describes a typical cleaning procedure
for the radia
tor. Refer to the OEM information for
further information on cleaning the radiator.
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 in
jury can result from air pressure.
Personal injury can result without following prop-
er procedur
e. When using pressure air, wear a pro-
tective face shield and protective clothing.
Maximum ai
r pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
Pressuriz
ed air is the preferred method for removing
loosedebris.Directtheairintheoppositedirection
to the fan’s air flow. Hold the nozzle approximately
6 mm (0.25 i
nch) 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 be
tween the tubes.
Pressurized water may also be used for cleaning.
The maxim
um 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 sid
es.
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.
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