5
Pump Maintenance
Lubrication or other maintenance
is not required, as the motors are
oil filled.
Generally, these pumps give
very reliable service, and can
be expected to operate for many
years without failure under
normal operating con di tions.
Lightning:
In some areas where considerable
lightning occurs, it is
recommended that a lightning
arrestor be installed at the control
panel. Lightning arrestors are
good insurance against damage to
an expensive motor.
Field Service on Motor:
All submersible motors out of
warranty can be serviced in
the field by any reliable motor
service shop. Any pump, in
warranty, must be returned to the
factory for service or re paired
at an authorized Hydromatic
®
service center. Charges will not
be allowed if in warranty pump
is not taken to an authorized
Hydromatic service center.
When field service is performed
on a pump, these instructions
should be carefully followed.
Replacing Stator:
1. If stator only is damaged,
it may not be necessary to
completely dismantle pump
as stator and housing can be
lifted from pump without
disturbing seals or bear ings.
2. To drain all oil from upper
hous ing, remove drain plug in
bot tom of stator housing and
remove plug in top of housing
to allow air to enter.
3. After chamber is drained,
remove hold-down bolts and
lift off. Use care in lifting as
replacing housing on pump.
This is important as leads
must be tucked behind the
windings by using hands up
through rotor core.
IMPORTANT: Use only
com pres sion type insulated
connectors on the wires.
Do not tape leads as oil will
de te ri o rate the tape and cause
damage to stator and bear ings.
8. Check top bearing. If clean
and does not turn rough,
bearings can be reused and it
is not necessary to com plete ly
dismantle pump to change
bearings. If bearings are
damaged with dirt or heat, they
must be replaced. Remember
to reinstall the upper bearing
load spring.
9. Replace stator housing onto
seal chamber and bolt in
place. BE SURE SEAL
FAILURE WIRE IS
CONNECTED BEFORE
HOUS ING IS ASSEMBLED.
Be sure O-ring seal has been
replaced. If O-ring is nicked
or cut, replace with new one.
This ap plies to all O-rings
used in as sem bly.
WARNING
BLACK
COIL
ON-OFF
SWITCH
L1
THERMOSTATS
IN SERIES
WHITE
L2
TWO WIRE CONTROL OFFERING AUTOMATIC RESET
THERMOSTATS
IN SERIES
WHITE
L2
BLACK
THREE WIRE CONTROL OFFERING AUTOMATIC RESET
L1
COIL OL
OL
START
IN CERTAIN APPLICATIONS THE NEC MAY REQUIRE THREE OVERLOAD RELAYS
WARRANTY IS VOID IF HEAT SENSORS ARE NOT
CONNECTED AS SHOWN (IN SERIES WITH CONTACTOR OIL)
the seal failure con nect ing
wire must be dis con nect ed
before housing is com plete ly
removed.
4. Set assembly on bench and
re
move connection box.
When box is lifted off,
connection wires to motor
will be exposed. These wires
will probably be burned, but
each wire is tagged with a
metal marker giving wire
number. Cut the wires.
If the leads to the connection
box are burned, a complete
new con nec tion box with new
wire must be used. The wires
are potted in with sealing
compound and a new
unit must be obtained from
the factory.
5. The stator is held in the
housing with a bolted-in
clamp ring.
6. After ring is removed, turn
hous ing upright and bump
on hard
wood blocks. This
should jar the stator loose and
allow it to drop out.
7. Thoroughly clean housing
before replacing new
stator. Replace stator and
make all wire con nec tions
to connection box before
