4.
Clean the cooling system filler cap and inspect the
gasket. If the gasket is damaged, discard the old
filler cap and install a new filler cap. If the gasket is
not damaged, use a suitable pressurizing pump in
order to pressure test the filler cap. The correct
pressure is stamped on the face of the filler cap. If
the filler cap does not retain the correct pressure,
install a new filler cap.
i07227862
Cooling
System
Water
Temperature
Regulator
-
Replace
Replace
the
water
temperature
regulator
before
the
water
temperature
regulator
fails.
Replacing
the
water
temperature
regulator
is
a
recommended
preventive
maintenance
practice.
Replacing
the
water
temperature
regulator
reduces
the
chances
for
unscheduled
downtime.
Refer
to
this
Operation
and
Maintenance
Manual,
“Maintenance
Interval
Schedule”
for
the
correct
maintenance
interval.
A
water
temperature
regulator
that
fails
in
a
partially
opened
position
can
cause
overheating
or
overcooling
of
the
engine.
A
water
temperature
regulator
that
fails
in
the
closed
position
can
cause
excessive
overheating.
Excessive
overheating
could
result
in
cracking
of
the
cylinder
head
or
piston
seizure
problems.
A
water
temperature
regulator
that
fails
in
the
open
position
will
cause
the
engine
operating
temperature
to
be
too
low
during
partial
load
operation.
Low
engine
operating
temperatures
during
partial
loads
could
cause
an
excessive
carbon
buildup
inside
the
cylinders.
This
excessive
carbon
buildup
could
result
in
accelerated
wear
of
the
piston
rings
and
wear
of
the
cylinder
liner.
NOTICE
Failure to replace your water temperature regulator
on a regularly scheduled basis could cause severe
engine damage.
Perkins engines incorporate a shunt bypass design
cooling system and require operating the engine with
a water temperature regulator installed.
If the water temperature regulator is installed incor-
rectly, the engine may overheat, causing cylinder
head damage. Ensure that the new water tempera-
ture regulator is installed in the original position. En-
sure that the water temperature regulator vent hole is
open.
Do not use liquid gasket material on the gasket or cyl-
inder head surface.
Refer to two articles in the Disassembly and
Assembly Manual, “Water Temperature Regulators -
Remove and Water Temperature Regulators - Install”
for the correct replacement procedure of the water
temperature regulator, or consult your Perkins dealer.
Note:
If the water temperature regulators are
replaced, drain the coolant from the cooling system
to a level that is below the water temperature
regulator housing.
i07297210
DEF
Filler
Screen
(Emission
Related
Component)
-
Clean
NOTICE
Ensure that the engine is stopped before any servic-
ing or repair is performed.
Illustration 87
g03725939
Typical example
1.
Ensure that the area around cap on the Diesel
Exhaust Fluid (DEF) tank is clean. Remove cap
(1).
2.
Using a suitable tool, press the tabs (2) to release
the tabs. With the tabs released remove the filter
screen (3) from DEF tank neck adapter (4).
102
M0087475-06
Maintenance Section
Cooling System Water Temperature Regulator - Replace