Hydromatic SKV40, Installation And Operation Manual And Parts, Page: 3 / 8

Connect pump to its own individual branch circuit with no
other outlets or equipment in the circuit. Size fuses or circuit
breakers according to the “Motor, Switch and Cord
Specifications” chart, Page 1.
Risk of electrical shock and fire. Can burn,
kill or cause property damage. Be sure that power supply
information (Voltage/ Hertz/Phase) on pump motor
nameplate matches incoming power supply exactly. Install
pump according to all electrical codes that apply.
OPERATION
Risk of fire or explosion. Can cause severe
personal injury, property damage or death. Do not use in
explosive atmospheres. Pump water only with this pump.
NOTICE: Do not allow the pump to run in a dry sump. It will
void the warranty and may damage the pump.
An automatic overload protector in the motor will protect
the motor from burning out due to overheating/overloading.
When the motor cools down, the overload protector will
automatically reset and start the motor.
If the overload trips frequently, check for the cause. It could
be a stuck impeller, wrong/low voltage, or an electrical failure
in the motor. If an electrical failure in the motor is suspected,
have it serviced by a competent repairman.
The pump is permanently lubricated. No oiling or greasing is
required.
Cycle the pump at least once every month to be sure that the
system is working satisfactorily.
NOTE: Any of the following will void the pump warranty:
1. Submerging, plugging, damaging or taping shut a vented
cord.
2. Pumping materials other than those the pump was
designed to pump or continuously pumping water hotter
than 120°F (49°C).
3. Cutting or splicing a power cord or switch cord.
4. Anyone other than an authorized Hydromatic service
technician dismantling the pump.
5. Removing the cord tag from the cord.
SERVICE
General
Hazardous voltage and risk of cord
damage. Can shock, burn, or kill. Before removing the
pump from the basin for service, always disconnect electrical
power to the pump and the control switch. Do not lift the
pump by the power cord. See the “Cord Lift Warning”, Page 2.
Disinfect the Pump
Place the pump in an area where it can be cleaned
thoroughly. Remove all scale and deposits on the pump.
Submerge the complete pump in a disinfectant solution
(chlorox or chlorine bleach) for at least one hour before
disassembling the pump.
The pump motor housing contains a special lubricating oil
which should be kept clean and free of water at all times.
NOTICE: Whenever the motor housing is being removed for
service, remove oil and replace it with new oil at reassembly.
Use only oil listed in parts list in this manual. When filling
with new oil, DO NOT overfill. Fill with new oil so that the
surface of the oil is 1/4" above the motor windings.
Check Motor Windings
1. Use a quality volt-ohm-meter (VOM) when performing
these inspections.
2. Set the meter to Rx1.
3. Touch both flat prongs of the power cord to the leads of
the VOM and observe the readings:
a. 230 Volt System - 0.8 to 1.1 ohms
b. 115 Volt System - 1.6 to 1.8 ohms
Check Pump Ground
4. Set the meter to Rx100.
5. Touch one lead to the grounding pin and the other lead
to one flat prong of the plug. Repeat for the other prong.
6. Reading should be infinity for both prongs.
a. If the reading is anything other than infinity, the stator
must be removed, dried and rechecked.
b. A reading of “0” indicates a dead short. Replace the
stator.
Removing the Pump Housing
(See “Disinfect the Pump”)
1. Remove the oil fill plug from the housing and drain the
pump oil into a clean bucket. A milky appearance
indicates that water has leaked into the oil. Replace
O-rings and/or seals.
2. Remove the three capscrews from the upper motor
housing and remove housing.
NOTICE: Use caution not to damage the two motor leads
that are attached inside the housing.
3.
Remove the two motor leads from the cord plug and set
aside.
Removing the Impeller
1. Remove the three capscrews and separate the volute
from the seal plate.
NOTICE: Loctite #277 is used to install the impeller during
assembly. Break this seal to remove the impeller. Use a
plastic or rubber mallet to tap on pump components while
holding the shaft with a screwdriver.
2.
Tap the impeller in a counterclockwise direction until it
comes free of the shaft.
3. Remove the three screws and remove the motor housing
from the seal plate.
Replacing Ceramic Seal
1. Insert a screwdriver under the rotating ceramic seal and
remove it.
2. Remove the two bolts holding the stator to the seal plate.
3. Tap the shaft and rotor assembly out.
NOTICE: The lower ball bearing will come out with the shaft
and rotor assembly.
4.
Tap out the stationary half of the seal from the top of the
seal plate and wipe clean.
5. Coat the replacement seal with a thin coat of dielectric oil
and push the seal into the seal housing with a plastic
dowel, carbon face out. Do not damage, scratch or mar
the carbon face of the seal.
Rotor Shaft and Bearing Replacement and Assembly
NOTICE:
The replacement rotor must be of the same
manufacture as the existing rotor.
1.
Push the new rotor shaft and bearing assembly into the
seal plate.
2. Fasten the stator to the seal plate with the two long
capscrews.
3. Tighten the screws evenly and firmly in order to prevent
any misalignment of the rotor and stator.
4. Coat the new ceramic rotating seal with a thin coat of
dielectric oil and press into place on the rotor shaft with
the rubber ring facing the impeller.
NOTICE: The ceramic seal must be kept clean. Any dirt will
cause the seal to fail.
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