7
flames in a septic (gaseous) or
possible septic environment.
Field Service on Motor:
All dry pit pump motors can be
serviced (out of warranty) in the
field by any reliable motor service
shop. Any pump (in warranty)
must be returned to the factory
for service or repaired in an
authorized Hydromatic service
center. Charges will not be
allowed if (in warranty) pump is
taken to a motor repair shop that is
not an authorized Hydromatic
service center.
When field service is performed
on a pump, these instructions
should be carefully followed.
Replacing Stator:
If motor winding is burned or
shorted it can be rewound or
replaced with a new factory
wound stator. Refer to the
sectional drawing of the pump
and motor and then use the
following steps to remove and
replace the stator.
1. Un-plumb and drain water
jacket if pump was supplied
with a water jacket and
remove.
2. 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 bearings.
3. Drain all oil from upper
housing, remove drain plug in
bottom of stator housing and
remove plug in top of housing
to allow air to enter.
4. After chamber is drained,
remove hold-down bolts and
lift off. Use care in lifting as
the seal failure connecting
wires must be disconnected
before housing is completely
removed.
See
sectional
drawing.
5. Set assembly on bench and
remove connection box. When
box is lifted off, connection
wires to motor will be
exposed. These wires will
probably be burned, but each
wire will be identified with a
metal wire marking number.
Cut the wires.
If the leads in the connection
box are burned, a complete
new connection box with new
wires must be used. The wires
are potted in with sealing
compound and a new unit
must be obtained from the
factory.
6. The stator is held in the
housing with a bolted-in clamp
ring.
7. After ring is removed, turn
housing upright and bump on
hardwood blocks. This should
jar the stator loose and allow it
to drop out.
8. Thoroughly clean housing
before replacing new stator.
Replace stator and make all
wire connections to the
connection
box
before
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
compression type insulated
connectors on the wires.
Do not tape leads as oil will
deteriorate the tape and cause
damage to stator and bearings.
9. Drain oil from lower seal
chamber. If oil is clean and no
water is present, seals can be
considered satisfactory to
reuse.
10.Check top bearing. If clean
and does not turn rough,
bearings can be reused and it is
not necessary to completely
dismantle pump and change
bearings. If bearings are
damaged with dirt or heat they
must
be
replaced.
See
additional instructions on
replacing seals and bearings.
Remember to reinstall the
upper bearing load spring.
11. Replace stator housing onto
seal chamber and bolt in place.
BE SURE SEAL FAILURE
WIRE
IS
CONNECTED
BEFORE
HOUSING
IS
ASSEMBLED.
Be sure O-ring seal has been
replaced. If O-ring appears
nicked or cut, replace with
new ones. This applies to
O-rings in the assembly.
12. After all leads are reconnected
in the connection box, make a
high voltage ground test on
each wire. The only wire that
should show ground is the
green power lead and the
ground lead in the auxiliary
power cable.
13.For safety, complete pump
should be air checked under
water for leaks. If seals are
OK, refill seal chamber with
oil. Lay pump on side for this
oil filling with oil fill hole
upright. Do not completely
fill; leave oil about 1 inch
below plug hole. Use only
Hydromatic submersible oil in
this chamber or high grade
transformer oil. Replace plug;
use Permatex on threads.
Install air valve in top plug
opening of motor housing and
charge housing with about
10 psi of air. Be sure air is dry.
Do not use air line where water
may be trapped in the line.
Summary of Contents for DRY PIT
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