Sears CRAFTSMAN 390.304050 User manual

OWNER’S
MANUAL
MODEL NO.
390.304050
CAUTION:
Read and Follow
All Safety Rules and
Operating Instructions
Before First Use of
This Product.
Save This Manual For
Future Reference.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
• Safety Instructions
• Installation
• Electrical
• Service
• Repair Parts
PRINTED IN U.S.A.
CRAFTSMAN
SUBMERSIBLE
SEWAGE PUMP
Form No. F642-9307 (Rev. 3/6/97)

2
CONTENTS
INTRODUCTION/WARRANTY. . . . . . . . . . . . . . . . . . . . . 2
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INTRODUCTION
Please read our instructions before you install and use your
new pump; this will help you obtain full value and good ser-
vicefromit.Itwillalsohelpyouavoidneedlessservicecosts
that result from causes we cannot control and cannot cover
in our warranty.
Carefully read and follow all safety instructions in this
manual or on pump.
This is a safety alert symbol.
When you see this symbol on your pump or in this manual,
lookforoneofthefollowingsignalwordsandbealerttothe
potential for personal injury.
warns about hazards that will cause serious
personal injury, death or major property damage if ignored.
warns about hazards that can cause serious
personal injury, death or major property damage if ignored.
warns about hazards that will or can cause
minor personal injury or property damage if ignored.
The word NOTICE indicates special instructions which are
important but not related to hazards.
1. Readthese rules and instructionscarefully.Failure to fol-
lowthemcouldleadtoseriousbodily injuryand/orprop-
erty damage.
2. Checkyour local codesbefore installing. Youmust com-
ply with their rules.
3. Vent sewage or septic tank according to local codes.
4. Do not install pump in any location classified as haz-
ardousbyNationalElectricalCode, ANSI/NFPA 70-1984.
Hazardous voltage. Can shock, burn
or cause death. Duringoperation the pump is inwater.
To avoid fatal shocks, proceed as follows if pump needs
servicing:
5A. Disconnect power to outlet box before pulling pump
cord plug.
5B. Take extreme care when changing fuses. Do not stand
in water or put your finger in fuse socket.
5C. Donotmodify cord and plugunlessremovingplug com-
pletelyand wiringpumpdirectlyintoswitch boxorcon-
troller. When using cord and plug, plug into a grounded
outlet only. When wiring to a system control, connect
pump ground lead to system ground.
6. Do not run pump dry. Dry running can overheat pump,
(causing burns to anyone handling it) and will void war-
ranty.
7. Pumpnormally runs hot.Toavoid burns whenservicing
pump,allowittocoolfor20 minutes after shutdown be-
fore handling it.
8. In normal service, motor should not need oiling. DO
NOT attempt to oil pump motor. A special oil has been
put into the motor housing at the factory; use of any
otheroil willvoidwarrantyandcould damagethepump.
FULL ONE YEAR WARRANTY ON SEARS SUBMERSIBLE SUMP PUMPS
During the first year after the date of purchase, Sears will repair or replace this pump, free of charge, if defective in materials or
workmanship.
This warranty does not cover repairs on replacement parts necessary because of abuse or negligence including failure to in-
stall, adjust and operate this pump according to the instructions in the owner’s manual.
LIMITED WARRANTY ON CRAFTSMAN SUBMERSIBLE SUMP PUMPS
During the second year after the date of purchase, Sears will furnish, free of charge, a replacement part for any defective part.
You pay for labor. LIMITATION OF LIABILITY
SEARSWILL NOTBE LIABLE FORLOSS ORDAMAGE TO PROPERTYOR ANYINCIDENTAL OR CONSEQUENTIALLOSS
OR EXPENSE FROM PROPERTY DAMAGE DUE DIRECTLY OR INDIRECTLY FROM THE USE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclu-
sion may not apply to you.
WARRANTY SERVICE IS AVAILABLE BY SIMPLY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPART-
MENT IN THE UNITED STATES of AMERICA.
For service outside the U.S.A., contact your local Sears Service Center or store.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., Dept. 817 WA, Hoffman Estates, IL 60179
GENERAL SAFETY INFORMATION

INSTALLATION
ADDITIONAL INSTALLATION
MATERIALS (Purchase Separately)
Two-inch(2”)plasticorsteelpipe,fittingsorclampsneeded
to do your job. We recommend a check valve, Sears stock
no. 2791.
THE SUMP
Figure 1 shows a typical sewage sealed sump basin.
Minimum sump basin size is 18” diameter. Consult local
codes for your operation, such as cover requirements, and
venting.
PUMP INSTALLATION (Figure 1)
Set the pump on the bottom of the sump, making sure that
it sits solidly and is level. Never place pump directly on
earth, clay, or gravel surfaces. Be sure there is enough space
around the pump to allow the switch free movement as the
sump sewage level changes.
PIPING
Use 2” or larger plastic or steel pipe. Run the discharge pipe
to the nearest sewer outlet or other point of disposal. Use
the most direct route and the fewest turns and elbows pos-
sible.
Use Teflon tape to seal threads in plastic pipe. Hand tighten
only.
The rate of flow in the discharge pipe must keep any solids
present in suspension in the fluid. To meet minimum flow
requirements (2 feet per second in discharge line), size pipe
as follows:
A Pipe Size Of: Will Handle a Flow Rate Of:
2” 21 GPM
2-1/2” 30 GPM
3” 48 GPM
Drill a 3/16” hole in discharge pipe about 1-2” above pump
discharge connection (but below check valve) to prevent
airlocking the pump.
CHECK VALVE (Figure 1)
To avoid backflow into sump when pump shuts off, install
a Sears check valve, stock no. 2791 as follows:
1. Provide5-1/2” spacingindesiredhorizontalposition in2”
discharge line.
2. Slide rubber sleeves onto both ends of check valve and
tighten clamps.
3. Insertdischarge pipeendsintorubbersleeves andtighten
clamps.
4. Run pump to be sure there are no leaks.
3
664 0194
2" Discharge
Pipe
2" Check
Valve
Clamp
(4 Req'd) Vent according to
local plumbing codes
Gate Valve to close
system for servicing.
Make sure valve does
not restrict flow.
GFCI
115V outlet
Sewage
On
18-in. Minimum
Diameter Sealed Basin.
5-1/2 in. pipe spacing
Automatic Float Switch
Off
3/16"
Vent Hole
Figure 1

INSTALLATION / ELECTRICAL
AUTOMATIC FLOAT SWITCH
INSTALLATION AND OPERATION
Your Sears Model 390.304050 Submersible Sewage Pump
comes with the automatic float switch mounted on the
motor housing ready for operation. Tether length is factory
set at 3-1/2".
Risk of electric shock. Always disconnect
the pump and switch from the electrical power source
before doing any maintenance! Your automatic float
switch is a single pole switch and does not control
both sides of the electrical circuit. To reduce the risk
of electrical shock it is essential that it be wired in se-
ries with the hot side of the electrical circuit. Make
sure your outlets are wired according to your local
electrical code.
Follow instructions below to install pump with factory
mounted switch:
1. Besureautomatic float can swingfreelythroughitsentire
arc without interference from pump, piping, sump wall
or any other object.
2. Plug the automatic switch cord into a properly grounded
outlet (see “Electrical Connections”).
3. Test the installation by adding water to the sump pit until
pump operates normally as follows:
A.When sump is dry, the watertight automatic float
switch is hanging in a downward position and the
pump is off.
B.As water comes into the sump, the automatic float
switchrises toanupwardpositionand thepumpstarts.
C.Waterwill continuetobepumpeduntil thefloatswitch
is hanging in the downward position again, when
pump will stop.
DO NOT ALLOW PUMP TO RUN DRY!
Pump should not be allowed to run dry prior to shutting off.
To do so voids the warranty and could ruin the pump.
ELECTRICAL CONNECTIONS
Risk of electric shock. When servicing
pump always disconnect power to electrical outlet
and remove pump electric cord from outlet.
The Sewage Pump has a 3-prong electric plug. The third
prong is used to ground the pump to prevent possible fatal
shock.Thethirdprongshouldneverberemoved.Yourelec-
trical outlet should be the 3-prong, polarized type with an
internal ground.
Aseparate15ampbranchelectricalcircuitisrecommended.
DO NOT USE AN EXTENSION CORD.
Testing for Ground
For your safety, check your outlet for ground using an
Underwriters Laboratory Listed Circuit Analyzer (Figure 3).
A Circuit Analyzer will tell you by a pattern of lights if the
power, neutral, and ground wires are correctly connected
to your outlet. It can also be used to check other outlets in
your home. A Circuit Analyzer is available in the Sears
Electrical Department.
Grounding Outlet
If your outlet is not grounded, install a copper wire (at least
14 gauge) from the outlet box, as shown in Figure 4 and 5,
to a metal cold water pipe. Use ground clamp on pipe.
IMPORTANT: The cold water pipe you use as a ground
must have metal continuity to electrical ground. If continu-
ity is interrupted by plastic, rubber, or other electrical insu-
lators; such as hoses, fittings, washers or gaskets (including
water meter or pump), a metal bypass must be used. Any
electricallyinsulatedconnectorshouldbejumped(asshown
in Figure 5), with a length of No. 4 wire clamped securely
at both ends.
4
3-1/2"
668 0194
Figure 2
UL Listed
Analyzer
Outlet
665 0194
669 0194
Bare copper wire to
cold water pipe.
Outlet
Box
Meter
Metal Water
Pipe
Clamp
No. 4
Wire
670 0194
Figure 3
Figure 5
Figure 4

ELECTRICAL / SERVICE
5
Automatic Thermal Overload Protection
This pump motor has a built-in automatic thermal overload
protector. If the motor overheats, the protector will open
and cut off power to the motor before the heat damages it
internally. The overload will reset automatically and the
pumpwillrestartafterthepumpcoolsdownbelowthedan-
ger point.
DO NOT attempt to work on the pump or
motor if the overload seems to have tripped. The
motor may restart without warning at any time. You
could be injured and the pump damaged if it starts
when you are working on it.
DO NOT attempt to repair a non-operational sewage pump.
Take it to Sears for service by a qualified technician.
Generator Sizing
Below is the minimum Engine-Generator Watt rating re-
quired to power this pump motor. Any additional loads,
such as lights, must be added to the listed load and the gen-
erator sized accordingly. Generators are available at all Sears
Stores.
Pump Minimum Watt
Motor HP Rating of Generator
1/2 3200
MAINTENANCE
Make certain that the pump is unplugged
before attempting to service or remove any compo-
nent.
1. The motor in the unit is sealed in oil. No additional lubri-
cation is necessary.
2. IMPORTANT: Disassembly of the motor assembly will
voidthe warranty.Itmightalsocause internalleakageand
damage to the unit. If repairs are required, return the
pump to the dealer from whom it was purchased.
3. Pumpinletshould be keptcleanandfreeofall foreign ob-
jects.
SERVICE/TROUBLESHOOTING
General
Risk of electric shock. When servicing
pump always disconnect power to electrical outlet
and remove pump electric cord from outlet.
1. If pump does not operate:
a. Check for loose plug at electric outlet.
b.Check for blown fuses or tripped circuit breakers at
fuse box/circuit breaker box.
c. Be sure nothing interferes with action of automatic
float switch.
d. If a, b, and c above check OK, plug in a light that you
know works. If it lights, take your pump to Sears for
service. If it doesn’t light, the electrical circuit is faulty;
consult a licensed electrician.
2. Pump starts, but blows fuses/trips circuit breakers:
After disconnecting power to pump, remove it from
sump. Remove the lower volute (see Figure 6, Page 6)
frombottom ofthepumpandmake surethattheimpeller
turns freely. Remove any debris obstructing impeller. If
pump still does not operate correctly, return it to your
nearest Sears Service Center for repairs.
3. Pump runs, but does not empty sump:
a. Clean pump intake.
b.Water may be entering sump faster than the pump can
discharge it.
c. Be sure vertical distance from pump discharge outlet
to discharge pipe outlet is 23 feet or less.
d. Be sure discharge pipe is not plugged or frozen.
Performance
Vertical Pumping Distance
3’ 5’ 10’ 15’ 20’ 23’
GPM 80 72 52 34 14 0
Maximum Load Amps: 10.0 Amps.
1. Attempting to lift or support pump by
power cord can damage cord and cord
connections.
2. Cord may pull apart, exposing bare wires
with possibility of fire or electrical shock.
3. Lifting or supporting pump by power
cord will void warranty.
4. Use lifting ring or handle on top of pump
for all lifting/lowering of pump.
Disconnect power to pump before doing
any work on pump or attempting to re-
move pump from sump.
1476 0195
Risk of electrical shock.
Can burn or kill.
Do not lift pump by
power cord.
WARNING

SERVICE
6
Impeller Replacement (Figure 6)
1. Unplug cord from power source.
2. Disconnect discharge piping at the check valve and lift
pump out of sump.
Do not lift pump by power cord, use T-
handle on top of motor, or lift out of sump using
piping.
3. Remove screws from lower volute housing and separate
volute halves.
4. Hold shaft with screwdriver in slot in end of shaft; un-
screw impeller from shaft.
5. Thread new impeller onto shaft. Hold shaft with screw-
driver and tighten impeller firmly hand tight.
6. Remount lower volute housing.
7. Lower pump into sump by piping, then reattach dis-
charge piping to check valve sleeve. Plug in unit.
8. Pumpis readyforoperation.Toavoid flooding, testpump
before operating by filling sump and running pump
throughone completecycletobesure thatswitchworks.
Switch Replacement (Figure 7)
NOTICE: Float must be able to swing through its complete
arc without interference from sidewall of sump, plumbing
or any other object.
1. Unplug cord from power source.
2. Remove tether clamp screw and slide cord from clamp.
Unscrew T-handle to remove cord.
3. Insert new cord in tether clamp in same location on cord
with respect to float.
4. Tighten tether clamp screw. Connect T-handle to pump.
5. Check sump pump operation by filling sump with water
and observing operation through one complete cycle.
Failure to check installation with water
in sump can lead to improper operation, premature
pump failure and flooding.
783 0394
Screwdriver
slot
Lower
Volute
Housing
Upper
Volute
Housing
Impeller
Volute Screw
( 11 Places )
Turn impeller counter-clockwise
hand tight.
T-Handle
Disassembly Reassembly
Notice: Submerge complete pump in a
disinfectant solution ( chlorox or chlorine )
for at least one hour before disassembling
pump.
Figure 6
3-1/2"
Tether clamp
screw
Clamp
784 0394
Figure 7

REPAIR PARTS
7
To Order Parts in the U.S.A., Call
Sears Product Service, 1-800-366-7278
Repair Parts List
Key Part Part
No. Number Description
1 U30-937SS Hi-Lo Screw (11 required)
2 PW1-11P Lower Volute
3 PW5-15P Impeller
4 PW1-10P Upper Volute
5 PS17-67 Cord/Switch Assembly
6 CC0030-13 Clamp
7 U30-955SS #8 x 5/8" Type A Screw
8 U30-912PS Screw (4 required)
• F642-9307 Owner’s Manual
• Not Shown. Quantity ONE unless otherwise noted ( ).
2
1
38
4
5
6
7
Motor
(see note)
283 1093
283 1093A
Pump will have either Y-Cord arrangement (item 5)
or Power Cord / Switch arrangement as shown
above.
Power Cord
P/N PS17-54
Float Switch
P/N PS217-62
NOTE: If motor fails,
replace entire pump.

For the repair or replacement parts you need
Call 7 am - 7 pm, 7 days a week
1-800-366-PART
(1-800-366-7278)
For in-home major brand repair service
Call 24 hours a day, 7 days a week
1-800-4-REPAIR
(1-800-473-7247)
For the location of a
Sears Repair Service Center in your area
Call 24 hours a day, 7 days a week
1-800-488-1222
For information on purchasing a Sears
Maintenance Agreement or to inquire
about an existing Agreement
call 9 am - 5 pm, Monday-Saturday
1-800-827-6655
MAINTENANCE
AGREEMENT
America's Repair Specialists
REPAIR SERVICES
America's Repair Specialists
REPAIR SERVICES
America's Repair Specialists
REPAIR SERVICES
OWNER’S
MANUAL
Model No.
390.304050
The model number of
your Submersible
Sewage Pump will be
found on a plate
attached to the side of
the motor.
When requesting service
or ordering parts, always
give the following
information:
• Product Type
• Model Number
• Part Number
• Part Description
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
CRAFTSMAN
SUBMERSIBLE
SEWAGE PUMP