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Westerbeke W-46 - Page 59

Westerbeke W-46
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COOLING
SYSTEM
c.
To
remove
impeller
(3),
sup-
port
the
shaft
with
a
stand
and
unscrew
impeller.
(NOTE:
The
impeller
is
thread-
mounted
on
the
shaft.
The
thread
is
right-handed.)
d.
Remove
space.r
(5)
from
the
shaft
at
the
pulley
side
of
the
pump
case.
e.
Remove
snap
ring
(6)
from
the
pulley
side
of
the
pump
case.
f.
Pull
shaft
{8)
off
the
pulley
side
of
the
pump
case
and
remove
bearings
(7)
and
(9)
from
the
shaft.
4.2
Inspection
a.
Examine
the
pump
operation
by
slowly
rotating
it.
If
the
pump
is
erratic
in
rota-
tion,
replace
bearings.
bearings.
b.
Visually
check
the
impeller
for
corrosion
or
breakage.
Replace
a
defective
impeller.
Also
check
for
signs
of
rubbing.
If
such
rubbing
is
evident,
check
the
cause.
The
impeller
and
case
or
cover,
if
found
damaged
due
to
rubbing,
must
be
replaced
with
new
ones.
c.
Check
the
condition
of
the
unit
seal.
Replace
the
seal
if
it
is
badly
worn
or
damaged.
I""'(WESTERBEKE
Engines
& Generators
57

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