Step
F-lb
(2)
(Cont'd.)
(c)
Unscrew
and
remove
the four hex
head
bolts that attach the fan end-plate
to
the motor.
Use
a hammer
to
tap the
edge
of
the fan end-plate
to
remove
it
from the motor.
NOTE:
If
the motor
has
a malfunctioning rotational lock bearing,
it
will
be
nElcessary
to
use
a torch
to
heat the center
of
the fan end-plate
and
the shaft.
The
heat should help loosen
the
Loctite 609 which bonds the OD of the
rotational lock bearing
to
the fan-end-plate bearing well. The lock bearing
is
press
fit
and
bonded
to
the shaft with Loctite. Additional heat may
be
required
to
separate
the lock bearing from the shaft.
(d)
Except for D60A/D90A's with Marathon motors, remove and discard the three
spring washers that fit between the fan end-plate
and
the bearing.
(e)
Remove
the shaft
and
attached rotor from the
motor
housing.
NOTE:
It
may
be
necessary
to
tap the other
end
of
the shaft
to
free the shaft
from the other end-plate.
(f) For
D30A pump models only, remove
and
save
for
reassembly
the
two
spacer
rings
that
fit
into the fan-end-plate bearing well.
Remove
and
discard the
spacer
ring
that
fits
against
the bearing on the other
end
of
the shaft.
(g)
Grease
the
two
new
spring
washers
(see
Table 5-2)
and
place
them together
so
that the
IDs
are
tight
against
each
other
and
so
that there
is
a
gap
between the
ODs.
(Figure
5-17
shows
ungreased
spring
washers
placed
together
as
de-
scribed above.)
(h)
Except for the D60A/D90A's with Marathon motors, reach through the motor
housing to place the two new greased spring washers into the bearing well
in
the other
end
plate.
(i)
Except for the D60A/D90A's with Marathon motors, use a puller to remove
and
discard the fan-end bearing from the shaft.
NOTE:
The
fan-end bearing
is
the smaller bearing.
(j) CAUTION: IF
ALL
GREASE
IS
NOT REMOVED FROM THE MATING
SURFACES, THE LOCTITE
WILL
NOT FORM A PERMANENT BOND
AND
THE ROTATIONAL LOCK BEARING
WILL
NOT WORK. THE
BEST
SOLVENT FOR THIS
PURPOSE
IS
TRICHLOROETHANE. THE FOLLOW-
ING SOLVENTS SHOULD NOT
BE
USED, SINCE
THEY
LEAVE A
FILM
ON
THE SURFACE: KEROSENE, GASOLINE, NAPTHA,
FUEL
OIL,
VARSOL,
AND STODDARD SOLVENTS.
CAUTION:
DO
NOT IMMERSE THE
NEW
ROTATIONAL
LOCK BEAR-
ING IN SOLVENT. GREASE MUST REMAIN IN THE INSIDE OF THIS
BEARING.
Wipe
all
grease
from the bearing well in the fan end-plate, from the fan
end
of
the shaft,
and
from the 10
and
00
of
the new rotational lock bearing.
(k) Reinstall the
rotor
and
shaft in the motor housing.
NOTE:
When
installed properly, the fan
end
of
the shaft (the
one
with the
bearing removed) will
face
you.
(I) CAUTION:
It
is essential that the rotational lock bearing is placed
on
the shaft
in
a way which allows the Inner Bearing Sleeve
to
rotate clockwise. Except for
the
D60A/D90A's with Marathon motors, the side of the bearing that has the
bearing's name
and
number stamped
in
it
should face toward the center of the
motor.
Occasionally, the
name
and number are stamped
on
the wrong side of
this bearing.
To
double check, hold the
00
of the rotational lock bearing
so
that
the side with the stamped name
and
number faces the
rotor.
While holding the
OD
tight, rotate the
10.
If the
10
rotates only
in
the clockwise direction, the
rotational lock bearing is positioned correctly.
TRIVAC
"A"
Manual, Edition L
33
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