4
Remove bolts (6) to separate
volute case (14) from motor
housing. Remove O-ring (18)
and seal plate (13) from motor
housing. Remove bolts to
separate motor-stator (20)
from rotor. If stator is visibly
burned, it must be replaced. If
stator is not burned but the oil
shows signs of water stator can
be checked with the ohmmeter
to see if it can be used.
6.
Ground check.
Set ohmmeter
scale pointer to R 2 100K scale
and check meter by putting
both meter leads together
and adjusting the needle knob
until meter reads zero. If meter
cannot be adjusted to zero it
will indicate that batteries in
meter must be replaced.
Note: Always reset meter to zero
(0) when going to a new scale
before making any checks on
motor. Connect one meter lead
to one blade terminal of stator
and touch other meter lead to
motor stator shell. If needle
reads below 500,000 ohms
stator must be dried out before
retesting. To dry out, place in
220 degree oven four hours.
Recheck after motor cools.
If motor is thoroughly dry,
needle of ohmmeter will not
move on the ground check.
This indicates a reading of
50 megohm or
higher. One
megohm is one million ohms.
When making the ground
check, if the needle goes to zero
the motor in all probability has
a wire touching the stator shell
at some point and the stator will
have to be replaced.
Note: If motor
shows a
satisfactory ground check then
the winding resistance must
be checked.
7.
Winding resistance test.
Use
ohmmeter with scale pointer
set on R 2 1 scale. On this
scale, meter reads directly on
ohms. Recheck to zero (0)
before making a reading on
the winding.
Note: If water is found in motor,
seal should be replaced.
8.
Replacing seal.
Remove (3
phase pumps only) the
impeller screw (31) and
impeller washer (30). Hold
rotor and unscrew impeller
(12). Bump on end of shaft
with plastic or rubber hammer.
This will push the rotating seal
(11) from shaft and also push
lower bearing from seal plate.
Clean seal plate (13) and motor
housing (21) thoroughly. All
sand and dirt must be removed.
Remove stationary ceramic seat
of seal (10) from seal plate.
Push new ceramic seat into
seal plate. Use Parker O-ring
Lube on rubber ring. Replace
rotor in seal plate (13). Use
care in putting shaft through
ceramic seat to be sure it is not
chipped. Inspect seal after shaft
is in place. If seal has been
chipped it must be replaced. Do
not replace rotating part of seal
until the balance of the pump
is assembled.
9.
Bearings.
When the pump
rotor has been removed, check
bearings before replacing. If
bearings are rusted or rough
when turned, they should be
replaced. Pull bearings with a
bearing puller. If puller cannot
be replaced over lower bearing,
remove the outer face by
cracking in a vice. After outer
face is cracked, it can be
removed and the balls can be
removed. This will allow inner
face to be pulled. When
Pump
Servicing
3.
Checking motor operation.
Plug power cord in power
receptacle to check motor
operation. Motor should start
and run smoothly. If motor
does not start, pump must be
dismantled and motor checked.
Be certain to unplug cord before
disconnecting any wires.
4.
Checking switch housing for
leaks.
After switch is replaced
and ready for operation, switch
housing must be checked for
air leaks. Use air hose and
blow air into switch housing
through nylon vent tube. Do
not put air nozzle directly
against tube but blow air with
nozzle about
1
⁄
8
inch from tube
end. Blow into tube then
remove nozzle and hold finger
over end of nylon tube. Place
plug near your cheek, then
release finger to be sure air is
in housing. Hold tube and
place complete pump unit
under water. Recharge housing
with air if necessary. An initial
surge of air bubbles will
appear, then none.
Note: If motor does not run
when tested as described above,
the stator must be removed
from the housing and checked.
5.
Checking motor
stator.
Remove plug (3) from top
of housing, and pour oil in
container, preferably glass, so
that oil can be observed. If oil
is clear it will indicate motor is
not burned and there has been
no water leaking into the
motor. If oil is cloudy or black,
it will indicate water in the
motor or a burned stator.
