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Perkins 4.99 - Water Pump Assembly Procedures; Assembling Water Pumps

Perkins 4.99
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M5
0.029/0.033 in
(0,74/0,84
mm)
4.
Examine
the
water
pump seal,
counterface
or
insert
for
excessive wear,
scoring
or
cracks
on the sealing
faces. Renew
where
necessary.
5.
Remove rust
and
scale
from the
impeller
and ex-
amine
for
excessive
corrosion
or
other
damage.
Renew where necessary.
6. Examine the
pump
pulley
for
signs
of
cracks,
corrosion
or
any
other
damage. Renew where
necessary.
To A.ssemble the Separate Bearing Type
(fig.
M.3)
I
NOTE:
On
later
pumps
items
4,
5,
0
and
1 are
no
longer
fitted
and
a
longer
distance
piece
has
been
introduced
to
accommodate
the
removal
of
the
seal
retaining
flange
(4).
1.
Position
the
thrower
(10)
in its
compartment
in the
pump
body
(3)
with
the
central
protrusion
of
the
thrower
towards
the
rear.
2. Insert
the
seal
retainer
(5)
and
position
the
felt
seal
(11)
and
seal retaining flange
(4)
with
the
dish
of
the
flange
towards
the
felt
seal.
3.
Press the
bearings
(12)
and
distance
piece
(2)
on
to
the
shalt
(8)
with
the
shielded
faces
of
the
bearings
facing
outwards
to
the
front
and rear
ends
of
the
shaft
and
three
quarters
fiJi
the bear-
ings
and
space
between
the
bearings
with
high
melting
point
grease.
4.
Press the
bearings
and shaft
assembly
into
the
body,
ensuring
that
the
shaft
passes
through
the
thrower. Fit
the
retaining
circlip
(13).
5.
Press the
thrower
into
its
position
on the shaft.
6.
Locate
any
pump
securing
setscrews
that
cannot
be fitted
after
the
pulley
(1)
is in
position.
7.
Press the
pulley
on to the
shaft
until
it abuts
the
front
bearing
and
where
applicable,
fit the
pulley
circlip
(4).
When the
pulley
is fitted
during
pro-
duction,
a pressure
of
2~
- 3
tonflin
2
(3,94/4.73
kgflmm2)
is required.
If
a
substantially
reduced
COOLING
SYSTEM-M.3
pressure will press
the
pulley
on
the
shaft, a re-
placement
pulley
and
lor
shaft
should
be fitted.
8.
Ensure that the
carbon
sealing
face
of
the
seal
(9)
is
clean
and fit the
seal
squarely
in
its
housing.
9.
Check
that the sealing
face
of
the
counterface
(7)
is
clean
and
position
the
counterface,
by
hand
only,
with
the
sealing
insert
registering
with
the
carbon
face
of
the
seal.
10. With
the
pump resting on the
front
end
of
the
shaft
and the pump
body
unsupported,
press
on
the
impeller
(6)
until
the
rear
face
of
the
impeller
vanes is
0.000/0.006
in
(0,00/0,15
mm)
below
the
rear face
of
the body.
To Assemble the Combined Bearing and
Shaft Type Pump (Fig. M.4)
1. Press the
bearing
and
shaft
assembly
(8)
into
the
pump
body
(2),
with
the
smaller
diameter
end
to-
wards
the
rear,
until
the
retaining
clip
grooves
of
the
bearing
and
body
align.
Fit the
retaining
clip
(7).
2.
Locate
any
pump
securing
setscrews
that
cannot
be fitted
after
the
pulley
(1)
is in
position
and
press
the
pulley on
to
the
shaft
until
the
front
end
of
the
pulley
is flush
with
the
front
end
of
the shaft.
3.
Press the
thrower
(6)
into
its
position
on the shaft.
4.
Ensure
that
the
carbon
face
of
the seal
(5)
is
clean
and
fit the seal
squarely
into its
housing.
5.
Check
that
the
sealing
face
of
the
counterface
(4)
is
clean
and
position
the
counterface,
by
hand only,
with
the sealing
insert
registering
with
the
carbon
face
of
the seal.
6.
With
the
pump resting on
the
front
end
of
the
sheft
and
the
pump
body
unsupported,
press
on the
impeller
(3)
until
the
rear
face
of
the
impeller
vanes is
0.000/0.006in
(0,00/0,15
mm)
below
the
rear
face
of
the pump body.
To A.ssemble Earlier
This
is
the
same
procedure
as
for
the
later
types
de-
tailed
above
except
for
the
following
points.
Before
assembly,
thoroughly
clean the
insert
recess
and
drain
hole
in the
body
with
cleaning
spirit
or
Locquic
'Q'.
After
fitting
the
bearings
and
shaft
assembly
and the
thrower,
lightly
coat
the
locating
diameter
of
the insert
(1)
and
the
inner
diameter
of
the insert recess
with
grade
'AVV'
Loctite.
Ensure that
the
counterface
(2)
is
clean
and
press
the
insert
home
with
the
cQunterface
to
the
rear
of
the
pump. Clean off any
surplus
Loctite.
When
pressing
in
the
insert, ensure
that
the
sealing
face
of
the
counterface
is
not
damaged.
Check
that
the
carbon
face
of
the seal
(3)
is
clean
and
position
the
seal
with
this
face
registering
on
the
counterface.
With
the
pump
resting
on
the
front
end
of
the shaft
and
the
body
unsupported,
press on
the
impeller
until
the
rear
face
of
the
impeller
vanes is
0.029/0.033
in
(0,7410,84
mm)
below
the
rear
face
of
the pump. On
earlier
pumps
where
the
seal
face
registers
directly
on
to
the
insert
with
no
counterface
fitted,
the
impeller
should
be
pressed
on
to
the shaft
until
the
clearance
between
the
front
face
of
the
impeller
and the
water
pump
body. is
0.005/0.010
in
(0,12/0,25
mm).
This
can
be
checked
by
means
of
a feeler
gauge
through
the
outlet
channel
of
the
pump
body.

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