Radiator - Clean - Perkins 1206A-E70TTA Operation And Maintenance Manual

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Maintenance Section

Radiator - Clean

• Softness
• Loose clamps
Replace hoses that are cracked or soft. Tighten any
loose clamps.
Check for the following conditions:
• End fittings that are damaged or leaking
• Outer covering that is chafed or cut
• Exposed wire that is used for reinforcement
• Outer covering that is ballooning locally
• Flexible part of the hose that is kinked or crushed
• Armoring that is embedded in the outer covering
A constant torque hose clamp can be used in place
of any standard hose clamp. Ensure that the constant
torque hose clamp is the same size as the standard
clamp.
Due to extreme temperature changes, the hose will
harden. Hardening of the hoses will cause hose
clamps to loosen. This action can result in leaks. A
constant torque hose clamp will help to prevent loose
hose clamps.
Each installation 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 expansion and contraction of the
fittings
Replace the Hoses and the Clamps
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
pressure.
Refer to the Disassembly and Assembly for the
correct instructions when replacing hoses and
clamps.
Radiator - Clean
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.
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.
Pressurized air is the preferred method for removing
loose debris. Direct the air in the opposite direction to
the fans 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 action 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 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.
After cleaning the radiator, start the engine and
operate engine with no load for 5 minutes. this engine
operation will help to remove any debris from the
radiation core. Use a light bulb behind the core i 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.
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