SEBU8337 55
Maintenance Section
Aftercooler Core - Clean/Test
i02578388
Afte rc ooler Core - Clean/Tes t
(Air-To-Air Af
tercooler)
Note: Adjust the frequency of cleaning according to
the effects of the operating environment.
Inspect the cooling air side of the aftercooler for these
items: damaged fins, corrosion, dirt, grease, insects,
leaves, oil, a
nd other debris. Clean the cooling air
side of the aftercooler, if necessary.
For air-to-ai
r aftercoolers, use the same methods that
are used for cleaning the outside of radiators.
Personal injury can result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a pro-
tective fac
e 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 debri
s. 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 will re
move debris that is between the tubes.
Pressurized water may also be used for cleaning.
The maximu
m water pressure for cleaning purposes
must be less than 275 kPa (40 psi). Use pressurized
water in order to soften mud.
Use a degreaser and steam for removal of oil and
grease. Wash the core with detergent and hot water.
Thoroughl
y rinse the core with clean water.
After cleaning, start the engine. Run the engine for
two minute
s. This will help in the removal of debris
and drying of the core. Stop the engine. Inspect
the core for cleanliness. Repeat the cleaning, if
necessar
y.
Inspect the fins for damage. Bent fins may be opened
with a “co
mb”.
Inspect these items for good condition: welds,
mounting
brackets, air lines, connections, clamps,
and seals. Make repairs, if necessary.
i02322311
Alternator - Inspect
Perkins recomm
ends a scheduled inspection of
the alternator. Inspect the alternator for loose
connections and correct battery charging. Check the
ammeter (if eq
uipped) during engine operation in
order to ensure correct battery performance and/or
correct performance of the electrical system. Make
repairs, as r
equired.
Check the alternator and the battery charger for
correct oper
ation. If the batteries are correctly
charged, the ammeter reading should be very near
zero. All batteries should be kept charged. The
batteries s
hould be kept warm because temperature
affects the cranking power. If the battery is too cold,
the battery will not crank the engine. When the
engine is no
t run for long periods of time or if the
engine is run for short periods, the batteries may not
fully charge. A battery with a low charge will freeze
more easil
y than a battery with a full charge.
i01878164
Battery - Replace
Batteries give off combustible gases which can
explode. A spark can cause the combustible gas-
es to ignite. This can result in severe pe rsonal in-
jury or death.
Ensure proper ventilation for batteries that are in
an enclosure. Follow the proper procedures i n or-
der to help prevent electrical arcs and/or sparks
near batteries. Do not smoke when batteries are
serviced.
The battery cables or the batteries should not be
removed with the battery cover in place. The bat-
tery cov
er should be removed before any servic-
ing is attempted.
Removin
g the battery cables or the batteries with
the cover in place may cause a battery explosion
resulting in personal injury.
1. Switch the engine to the OFF position. Remove
all electrical loads.
To Next Page
Loading...
