Perkins 403EA-11, Руководство по эксплуатации и обслуживанию, Страница: 103 / 114

• 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 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
Refer to the OEM information for further information
on removing and replacing fuel hoses (if equipped).
The coolant system and the hoses for the coolant
system are not usually supplied by Perkins. The
following text describes a typical method of replacing
coolant hoses. Refer to the OEM information for
further information on the coolant system and the
hoses for the coolant system.
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.
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.
Disconnect 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 the cooling system. Refer to the OEM
information for further information on refilling the
cooling system.
9.
Clean the cooling system filler cap. Inspect the
cooling system filler cap's seals. Replace the
cooling system filler cap if the seals are damaged.
Install the cooling system filler cap.
10.
Start the engine. Inspect the cooling system for
leaks.
i08254039
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.
The maximum air pressure for cleaning purposes
must be reduced to 205 kPa (30 psi) when the air
nozzle is deadheaded.
Pressurized air is the preferred method for removing
loose debris. Direct the air in the opposite direction of
the 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 movement 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.
M0132847 103
Maintenance Section
Radiator - Clean