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Kawasaki KZ1300-A1 Quick Reference Manual Page 205

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MAINTENANCE--ENGINE
your face well away from the
radiator.
Wait a few
seconds, then finish removing the cap.
Radiator
inspection
Check
the radiator core.
If
there are obstructions
to air flow, remove them.
If
the corrugated fins are
deformed,
carefully straighten them with the thin blade
of a screwdriver.
If
the air
passage
of the radiator core is clogged up
more
than
20%
by unremovable obstructions or un-
repairably deformed fins, replace the radiator with a
new
one.
Check
the radiator filler neck for signs of
damage.
Check
the condition of the top and bottom sealing
seats in the filler neck.
It
must be smooth and clean
for the radiator cap to function
properly.
A. Top Sealing Seat
B. Bottom Sealing Seat
Radiator cap
inspection
Check the condition of the valve
spring,
and the
top and
bottom
valve seals of the
radiator cap.
If any
one of
them shows visible damage, replace the
cap.
A. Valve Spring
C. Bottom Seal
B.
Top Seal
Install the cap on a cooling
system
pressure tester.
Watching the pressure gauge, pump the pressure tester to
build up the
pressure.
The cap must retain the pressure.
(Watch the pressure gauge at least
6
seconds to check
that the
pressure holds
steady.)
But
the cap must
open
at the pressure of the rating specified shown
in Table
H84,
and relieve the
pressure
greater than
the
specified.
A. Pressure Tester
B. Radiator Cap
Table H84
Radiator Cap
specification
Pressure
Valve
Opening Pressure
Radiator hose
inspection
0.75-1.05
kg/cm
2
(11-15
psi)
In
accordance with the Periodic Maintenance Chart
(Pg. 10), visually inspect the hoses for
signs
of deteri-
oration
.
Squeeze
the hose. A hose should not be hard
and brittle, nor should
it
be soft or
swollen.
Replace
any damaged
hose.
Tighten the hose clamps
securely.
Thermostat
The thermostat
is
a wax pellet
type,
and operates by
heat. This type of the thermostat is not pressure sensi-
tive, and works well in a fully pressurized
system.
The
thermostat constantly changes the sizes of its two
valve openings to keep the water temperature to
the
proper level. The sizes of the valve openings are
deter-
mined by the amount that the wax
in
the cylinder
expands.
Thermostat inspection
Remove
the thermostat, and
inspect
the thermostat
valve at room
temperature.
If
the valve is opened, re-
place the valve with a new one.
Measure the bypass valve height from the valve frame,
and note
it.
This
is to know the full valve lift tested
later. (See
Fig.
Hl19)
.
To
check
valve opening temperature, suspend the
thermostat in a container of water.
The thermostat
must be completely submerged, and must not touch
the
container sides or bottom. Suspend an accurate ther-
mometer in the water. It must not touch the container,
either.
Place the container over a source of heat and
205

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