HIGH
WATER
TEMPERATURE
CUT-OFF
SWITCH
This
normally
closed
switch
senses
water
ternpera-
ture in the engine cooling jacket. The switch opens,
breaking the circuit
to
the coil primary when the
water temperature reaches approximately 200° F and
closes when the temperaure drops below approxi-
mately
160"
F.
WATER
PUMP
This pump is a positive displacement, neoprene
impeller type, used to pump raw water through the
cooling system.
Disassembly
(Pump
131-0165)
'
1.
Remove the pump end plate screws, end plate,
and gasket as shown in Figure
26
(Step a).
2.
Pull out neoprene impeller with a pair
of
pliers
(Step b).
3.
If further disassembly
is
required, disconnect the
hoses and removethe two capscrews holding the
pump to the engine (Step c).
Lift
pump from
engine.
4.
Loosen the set screw on the side of the pump and
tap
it
lightly to free the cam from the pump body.
Lift out cam and wear plate (Step d).
5.
Remove the retaining ring (using a screwdriver)
as shown in Step e and slide the seat assembly
(O-ring and ceramic seal) off the pump shaft.
6.
Pry the bellows assembly out of the pump body
by inserting ascrewdriverthrough the drain slots
(Step
f).
7.
Drive the shaft and bearing assembly out of the
pump body using a bearing driver or press. The
bearing is press fit on the shaft and comes off in
one integral part.
Assembly
(Pump
131-0165)
Inspect the pump housing for wear, rough surfaces,
or
pitting and replace if any of these conditions exist.
Replace any other
worn
components
such
as
bear-
ings, seals, or impeller and use a new end plate
gasket.
1.
Apply sealing compound to thesealing lip around
the edge of the bellows seal. Place the bellows
seal in the pump body and drive
it
into place(Step
9)
-
2.
Apply a small amount of Loctite or eqivalent on
the outside surface
of
the bearing (Step h).
3.
Place the bearing and shaft assembly in the pump
bore and drive into place (Step i). Strike outer
race only
to
avoid damage to pump shaft and
bearing.
4.
Lubricate both sides of the seat assembly (cer-
amic seal and O-ring) with lubricating oil and
slide assembly over pump shaft.Theceramic por-
tion of the seat assembly should contact the bel-
lows. Compress the seat assembly against the
bellows and at the same time push the retaining
ring into its groove on the pump shaft.
5.
Place wear plate and cam
so
notch in wear plate
lines up with tank on cam (Step
j).
Fasten cam to
housing with screw.
6.
Align the flat spot in the center of the impeller
with the flat spot on the pump shaft. Bend back
the impeller blades nearest the cam and push the
impeller onto the shaft.
Do
not remove the factory
coating of
oil
from the new impeller before
installing.
7.
Install the pump end plate using a new gasket and
tighten end plate screws to
15-1
7
in-lb
(1.7-1.9
Nm).
8.
Install pump on engine (Step k) and attach hoses.
37
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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