Craftsman 390.252158 User manual

OWNER'S
MANUAL
MODEL NO.
390.252158
CAUTION:
Read and Follow
All Safely Rulesand
Operating Instructions
Before FirstUseof
ThisProduct.
Save ThisManual For
FutureReference.
€-RAFTSMAN°
PROFESSIONAL
112HP SHALLOW WELL
WATER SYSTEM
•Safety Instructions
• Installation
• Electrical
• Maintenance
• Repair Parts
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
PRINTED IN U.S.A. Form No. F642-9823 (9/25/98)

CONTENTS
INTRODUCTION/WARRANTY .......................................... 2
PUMP PERFORMANCE ....................................................... 3
MAJOR COMPONENTS ...................................................... 3
INSTALLATION ................................................................ 4-5
ELECTRICAL..................................................................... 56
OPERATION ........................................................................ 7
MAINTENANCE ............................................................... 7-9
HELPFUL HINTS ............................................................... 10
TROUBLESHOOTING GUIDE ........................................... 11
REPAIR PARTS ............................................................. 12-14
INTRODUCTION
Please read our instructions before installing and using your
Shallow Well Water System• This will help you obtain the
full benefits of the quality and convenience built into this
equipment. It will also help you avoid any needless service
expense restdting from causes beyond our control which are
not covered by our warranty.
For five years from date of purchase; Sears will repa_ or replace the tank, free of chargei l[_vc in m_,flerial or workmanship. :
This warranty does not cover relyatts or replacement parts necessary because of abuse or _gence, inc_ failure to install, adpist an doperate this
according to the instructions in the 0wn_ manual _
,:_ LIE TATION OF LIABIEI_
SEARS WILL NOT BE LIABLE FOR LOX_ OR DAMAGE TO PROPERTY OR ANY INCID_ OR CO_UENITAL LOSS OR_EXPENSR FROM PROP_
DAMAGE DUE DIRECTLY OR INDIRECTL_FROM THE USE OF THIS PRODUCT: i
Some states do not allow the exduston or limitaOo n of mctdental or consequential damagcs_ so the abov_ _tatlon or ex_!_not apply to you.
This wareanty applies only w_e _ p_t is in the United States.
Thiswarranty gtyesyou s_ !€_ dghts_andy_ may alsohave other nghts whlch _ state t_te. ,
Se_ R0eb_k and Co. Dept. 817WA, Ho_ Est_ IL 60 |79_
READ AND FOLLOW SAFETY INSTRUCTIONS! '
Carefully read and follow all safety instructions in this
manual or on pump.
This is the safety alert symbol. When you see this
symbol on your pump or in this manual, look for one
of the following signal words and be alert to the potential
for personal injury!
_wams about hazards that will cause serious
personal injury, death or major property damage if ignored.
AWARNING
LJwarns about hazards that will or can cause se-
rious personal injury, death or major property damage if ig-
nored.
!A CAUTION]warn sabout 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.
"_ACAUTION1Never run pump dry. Running pump without
water may cause pump to overheat, damaging seal and pos-
sibly causing bums to persons handling pump• Fill pump
with water before starting.
LAWARNINGJNever run pump againstdosed discharge.
To do so can boil water inside pomp, causing hazardous
pressure in unit, risk of explosion and possibly scalding
persons handling pump.
[A CAUTION [Motor normaliy operates at high temperature
and will be too hot to tonch_ It is protected from heat dam-
age during operation by an automatic internal cutoff switch.
Before handling pump or motor, stop motor and allow to
cool for 20 minutes.
l. To avoid risk of serious bodily injury and property dam-
age, read safety instt'uctions carefully before installing
pump•
2. Follow local and/or national plumbing and electrical
codes when installing pump•
3. Keep well covered while installing pump to prevent
leaves and other debris from falling into well, con-
taminating well and possibly damaging pump.
4. Protect pump and piping system from freezing. Allowing
pump or water system to freeze could severely damage
pump and voids warranty.
LAWARNING]To avoid serious injury and equip-
ment damage, limit system pressure to 100 pounds
per square inch (PSI) or below at all times. Over-
pressure can cause tank blowup; install relief valve
capable of passing full pmnp volume at 100 PSI.
5. With a new well, test well for purity before use. Consult
local Health Department for procedure.
LAWARNlNGJHazardous voltage. Can shock, burn,
cause death, or start fires.
•o
2

SAFETY INSTRUCTIONS (Continued)
6. Disconnect electrical power source before installing or
working on pump.
7. Ground pump with a ground wire run from grounding
lug on motor to a grounded lead in the service panel.
8. Line voltage and frequency of electrical power supply
must agree with motor nameplate.
9. Use of fuses or wire smaller than size recommended in
owner's manual can cause overheating, possible fires,
and will void warranty.
Pump
Model
TABLE I - Pump Performance (In Gallons per Minute)
NOTE: This system is designed for pumping depths of 20 feet or less.
Description Suct. Disch.
390.252158 1/2 HP S.W. Jet 1-1/4" 1" 40
Discharge Pumping Depth in Feet
Pressure PSI 5' 10' 15' 20'
8.2 7.3 6.2 5.0
BASIC TOOLS AND MATERIALS NEEDED:
Plastic Pipe Installation
Tools
Pipe Wrenches
Screwdriver
Knife or Saw to Cut Plastic Pipe
Tire Pressure Gauge
Materials
Plastic Pipe and Fittings (as required to complete job).
Teflon Tape (DO NOT use joint compound on plastic fittings).
Galvanized Steel Pipe Installation
Tools
Pipe Wrenches
Screwdriver
Pipe Cutting and Threading Tools
Tire Pressure Gauge
Materials
Galvanized Pipe and Fittings (as required to complete job).
Pipe Joint Compound or Teflon Tape
MAJOR COMPONENTS AND WHAT THEY DO
Impeller and Jet
Impeller turns with motor shaft, causing water to fly out
from its rim by centrifugal force. Impeller rotation creates a
vacuum which pulls in more water. Part of the water is di-
verted back to the jet where it passes through the nozzle and
venturi. This creates more vacuum to draw in more water.
In shallow wells (less than 20 feet deep), the vacuum cre-
ated at the pump is enough to pull water to the pump.
Therefore, for shallow well use the jet is built into the pump.
Pre-Charged Tank
The tank serves two functions. It provides a reservoir of
water under pressure and maintains a cushion of air pres-
sure to prevent pipe hammering and possible damage to
plumbing components. When water is drawn off through
the house fixtures, the pressure in the tank is lowered and
the pump starts.
Pressure Switch
The pressure switch provides for automatic operation.
Pump starts when pressure drops to 40 pounds and stops
when pressure reaches 60 pounds.
Check Valve or Foot Valve
This pump is equipped with a built-in check valve. Install a
check valve as close to well as possible on well point in-
stallations. A foot valve must be installed in the well on dug
or cased wells. See Figures 2A and 2B, Page 4. For long hor-
izontal pipe runs, install check valve as close to well as pos-
sible (all types of wells).

INSTALLATION
INSTALLATION
Piping in the Well
The Shallow Well Water System can be installed on a dug
well, drilled well or with a driven point. In a dug or cased
well, a foot valve and strainer should be installed for easy
priming. It should be installed five to ten feet below the low-
est level to which the water will drop while the pump is op-
erating (pumping water level). To keep sediment from
clogging the strainer, be sure it is five to ten feet above the
bottom of the well. Before installing the foot valve, make
sure that it works freely.
When using a foot valve, a priming tee and plug as shown in
Figure 1, are recommended.
PrimingPlug,
PrimingTee
(U:s.erSupplied)
\
To Service
From
Well
For a pump at sea level mounted directly over the well, be
sure the total lift from the pumping water level to the pump
does not exceed 20 feet. This will be less if the pump is off-
set from the well.
The maximum lift of any pump decreases at the rate of about
1' less lift for every 1,000 feet of elevation above sea level.
For example, at Denver, Colorado (Elev. 5,000') the pump
loses five feet of lift. The maximum depth from which it
would pump water would therefore be 15 feet.
Plastic Pipe
Well Seal
Pipe
and Strainer
Figure 2B
311 1293
Dug or Cased Well
Figure I
When installed on a driven point well, your Shallow Well
Water System should have a check valve installed as shown
in Figure 2A.
Figure 2A
CCheckValve
ISteel Drive Pipe
D__dvecoupling
Well point
_Ddvenpoint
PUMP/TANK INSTALLATION
Pump
NOTICE: Use Teflon tape supplied with the pump or Plasto-
Joint Stik' for making all pipe-thread connections to the
pump itself. To avoid stress-cracking, do not use pipe joint
compounds on the pump.
1. Wrap male pipe threads being attached to pump with
one or two layers of Teflon tape. Cover entire threaded
portion of pipe.
2. Do not overtighten threaded fittings in the plastic pump.
Be sure you do not try to tighten joint past thread stop
in pump port!
3. If leaks occur, remove fittings, clean off old tape, rewrap
with two to three layers of tape and remake the con-
nection. If joint still leaks, replace the fittings (fittings
may be undersized).
4. Be sure to support all piping connected to the System.
'Lake Chemical Co., Chicago, Illinois
Horizontal Piping from Well to Pump
When the pump is offset more than 25 feet from the well,
horizontal suction pipe size should be increased to reduce
friction losses. Never install a suction pipe that is smaller
than the suction tapping of the pump.

INSTALLATION
1-1/4" 1-1/2" 2"
Upto 25 Ft. 25 to 50 Ft. 50 to 200 Ft.
Discharge Pipe Sizes
When the pump is some distance from the house or point
of water use, the discharge pipe size should be increased to
reduce pressure losses caused by friction.
1" 1-1/4" 1-1/2"
Up to 25 Ft. 25 to 100 Ft. 100 to 600 Ft.
"rank
Tanks are pre-charged with 40 PSI air pressure at the factory.
Your tank requires an air charge of 40 pounds per square
inch (PSI) for proper operation; check tank pressure with
tire gauge to determine flair charge needs adjustment. Tank
pre-charge should be checked annually; see instructions at
right.
In areas where the temperature is high for long periods of
time, the tank pre-charge pressure may increase. This may
reduce the tank drawdown (amount of water available per
cycle). If this occurs, reduce the pre-charge pressure to two
PSI below the pump cut-in setting of the pressure switch
(normally to 38 PSI).
It is necessary to flush all air out of the piping system and
water reservoir portion of the pre-charged tank. This is re-
quired on new installations, pumps requiring repriming and
pumps that have been disassembled for service. Do this as
follows:
1. Open faucets furthest from tank and allow pump to op
erate.
2. Air in the system will cause a sputtering flow; allow
faucets to run until you have a steady, air free stream.
3. Open and close faucets repeatedly until you are sure all
air has been removed.
4. If stream does not become steady, air may be leaking into
the system; check for leaks in the piping on the suction
side of the pump.
NOTICE: To prevent waterlogging, check tank air charge
annually.
To Check Tank Air Charge
If drawdown (amount of water available per cycle) de-
creases significantly, check as follows:
1. To check air charge in tank, shut off electric power to
pump, open faucet near tank, and drain completely.
2. At the air valve in top of tank, check air pressure with
standard tire gauge. Air pressure should be the same as
pump pressure switch cut-in setting (40 PSI).
3. If the air pressure is below 40 PSI, add air to the tank.
Use an air compressor or a portable air storage tank.
4. Use soap or liquid detergent to check for air leaks around
air valve. Continuous bubbling indicates a leak. If neces-
sary, install new core in air valve. This is the same as
those used for automobile tubeless tires.
1 2 L-/ X...J L.J L.J k--t X._/ 3 4 5
1. Tank nearly empty - air expands filling area above
vinyl separator.
2. Water begins to enter tank - air is compressed above
separator as it fills with water.
3. Pump-up cycle completed - air now compressed to
cut off setting of pressure switch.
4. Water being drawn from tank -compressed tank air
forces water out of separator.
5. Separator completely empty -new cycle ready to
begin.
Figure 3
Motor
Horsepower
1/2
ELECTRICAL
Table II Wiring Chart - Recommended Wire and Fuse Sizes
Volts
115/230
Max. Load
Amps.
8.8/4.4
Branch
Fuse*
Rating Amps
15/15
Distancein FeetfromMotortoMeter
0'to 101'to 201'to 301'to 401'to
100' 200' 300' 400' 500'
Wire Size
1_14 1_14 1_14 _14 _12

ELECTRICAL
Disconnect power before working on pump, motor, pressure switch, or wiring.
Your Motor Terminal Board (under the motor end cover) if line voltage is 230 Volts or if you have a single voltage
and Pressure Switch look like one of those shown below, motor. Connect power supply as shown for your type of
Convert to 115 Volts as shown. Do not change motor wiring switch and your supply voltage.
230 Volt to 115 Volt Conversion,Plug-inType:
1. Pullplug 2. Plug inagain
straight with arrow
outfrom onplug
terminal pointing to
board. '115 Volts'.
230 Voltto 115 Volt Conversion, Spade Connector Type:
1.Move blackwire 2. Move white wire
from Ato LI. with black tracer
from B to A.
3. Change Complete:
.Ground
Screw
_98
- Motor wires connecthere.
Power supply wires connecthere.
230 Volt: Connect 2hot wires (blackand red)
here and cap thewhite (neutral)wire. It does
notmatterwhichwire goestowhichscrew.
115 Volt: Connectone hot wire(black or red)
toone of these screws(it doesn'tmatter
whichone). Connectthe white(neutral)wire
tothe otherscrew.Cap any remaining
black or redwires.
Clamp the powercable toprevent strain
on theterminal screws.
green (or bare copper) ground wire
to the green ground screw.
Motor wires connecthere.
-Power supply wires connecthere.
230 Volt: Connect2hotwires(blackand red)
here and capthe white (neutral)wire. Itdoes
notmatterwhichwiregoes towhichscrew.
It 5 Volt: Connectone hot wire(blackor red)
to one ofthese screws(it doesn'tmatter
whichone). Connectthe white(neutral)wire
tothe otherscrew.Cap any remaining
. blackor redwires.
Clamp the powercable to preventstrain
onthe terminalscrews.
- Connectthe green (orbare copper) groundwire
tothe green groundscrew. _sz0a98
Figure 4: Motor wiring connections through Pressure Switch. Match motor voltage to line voltage.
[AWARNING IHazardous voltage. Can shock, burn, or
kill. Connect ground wire before connecting power
supply wires. Use the wire size (including the ground
wire) specified in the wiring chart. If possible, connect
the pump to a separate branch circuit with no other appli-
ances on it.
A__WARNING] Explosion hazard. Do not ground to a gas
supply line.
WIRING CONNECTIONS
_q
[AWARNING_JFire hazard. Incorrect voltage can cause a
fire or seriously damage the motor and voids the warranty.
The supply voltage must be within :t:10% of the motor name-
plate voltage.
NOTICE: Dual-voltage motors are factory wired for 230
volts. If necessary, reconnect the motor for 115 volts, as
shown. Do not alter the wiring in single voltage motors.
Install, ground, wire, and maintain your pump in compli-
ance with the National Electrical Code (NEC) or the
Canadian Electrical Code (CEC), as applicable, and with all
local codes and ordinances that apply. Consult your local
building inspector for code-information.
Connection Procedure:
1.
2.
Connect the ground wire first as shown in Figure 4. The
ground wire must be a sofid copper wire at least as large
as the power supply wires.
There must be a solid metal connection between the
pressure switch and the motor for motor grounding pro-
tection. If the pressure switch is not connected to the
motor, connect the green ground screw in the switch to
the green ground screw under the motor end cover. Use
a sofid copper wire at least as large as the power supply
wires.
3. Connect the ground wire to a grounded lead in a service
panel, to a metal underground water pipe, to a metal
well casing at least ten feet (3M) long, or to a ground
electrode provided by the power company or the hydro
authority.
4. Connect the power supply wires to the pressure switch
as shown in Figure 4.
6

OPERATION
Priming the Pump
NOTICE: To properly prime the pump, install apipe tee in
the discharge piping (see Figure 1, Page 4).
To prevent damage to internal parts, do not start motor until
pump has been filled with water.
To prime pump:
1. Remove priming plug (Purchase separately; Figure 1,
Page 4).
2. Fill pump with water.
3. Replace priming plug, using Teflon tape or Plasto-Joint
Stik _ on plug threads; tighten plug.
4. Start the pump. Water should be pumped in 1-2 minutes.
If not, repeat steps I, 2 and 3.
On shallow depths to water (10 feet or less), the pump
.
will probably prime the first time after the following
steps 1 through 4above.
From 10 to 20 foot depths, you might have to shut off
the pump and repeat steps 1, 2 and 3 several Omes.
If, after priming pump several times, no water is
pumped, check the following:
A. Be sure suction pipe is in the water.
B. Be sure suction pipe does not leak.
C. Be sure that pump is not trying to lift water too high
(see "Piping in the Well", Page 4).
D. As long as foot valve and check valve function cor-
rectly and suction pipe does not develop leaks, pump
should not need repfiming in normal service.
zLake Chemical Co., Chicago, Illinois
MAINTENANCE
Lubdcation
It is not necessary to lubricate the pump or its motor. The
motor bearings are lubricated for life. The mechanical shaft
seal in the pump is water lubricated and self-adjusting.
Draining for Winter
IAWARNING ] Risk of electric shock. Disconnect power
before working on unit.
Pump should be drained whenever it is disconnected from
service or is in danger of freezing.
1. DISCONNECT POWER.
2. Open faucet and relieve all pressure on .system before
proceeding.
3. Disconnect pressure switch tube (Key No. 17, Page 12)
at barbed elbow on pressure switch (Key No. 28) and
allow tube to drain.
4. Open draincock (Key No. 22, Page 12) on pump body
and allow pump to drain.
5. Remove priming plug to vent pump; disconnect hose
(Key No. 6, Page 14) at tank end and drain pressure tank
and all piping to a point below the frost line.
6. Be sure to drain any piping that may be cut off from nor-
mal system drain due to check valve installation.
Vinyl Bag Removal
[_'WARNINGI Be sure ALL air pressure has been re-
leased from tank before removing nuts from flange.
Failure to do this may result in serious or fatal injury.
Do not attempt to open tank unless all pressure has
been relieved! t
[_,WARNING_ Risk of electric shock. Disconnect power
before working on unit.
1. DISCONNECT POWER TO PUMP.
2. Drain system as follows:
A. Open faucet closest to tank.
B. Open draincock (Key No. 22, Page 12) on pump
body.
C. Remove hose (Key No. 6, Page 14) from tank flange.
3. Relieve (expel) ALLair pressure in system by removing
valve core.
4. Disconnect outside piping from tank and pump.
[_I,WARNING]To avoid serious or fatal injury, be
sure all air pressure has been released from tank
before proceeding to step 5.
5. Remove nuts and washers from tank inlet flange (Key
No. 2, Page 14). Tap inlet flange to break seal. Remove
flange.
6. Wherever convenient, hold hag with pliers and cut with
single-edge razor blade or sharp knife. Bag will not come
out in one piece. Continue pulling and cutting until bag
is removed.
7. Clean and dry inside of tank.
8. Place replacement bag on a clean surface with opening
up. Flatten bag and force air out.
9. Tightly roll bag towards center opening.
10. Before center opening is covered up, force air out of re-
maining portion of bag. Finish rolling bag.
11. To make bag easier to insert into tank, sprinkle outside
of bag with talcum powder.
12. Being careful not to break valve, stand tank on end. Push
tightly rolled bag into tank.
13. Reach into bag and push out sidewalls. You need not
remove all wrinkles.
14. Clean center opening ring on bag and lip on tank.
15. Pitll ring on bag through tank opening and fit over tank
lip. BE SURE it seats properly in groove on tank lip.
16. Clean sealing surface of inlet flange and place on studs.
17. NOTICE: Tighten nuts as follows:
A. Hand tighten all nuts.
B. Tighten one nut snug.
C. Tighten opposite nut snug.
D. Proceed, tightening opposite pairs to a snug fit.
E. Recheck all nuts, using same pattern. Be sure all nuts
are tight and you have a good seal.
7

MAINTENANCE
NOTICE: Do not overtighten; you may twist studs off of
tank. If you have a torque wrench, tighten to 85 inch-
pounds torque.
18. Stand tank on feet and reconnect piping.
19. Recharge tank to proper air pressure (see Page 5).
20. Recormect hoses and pressure switch tube; prime pump
(see Page 6).
Air Valve Replacement
1. Follow steps 1 through 5 under "Vinyl Bag Removal",
Page 7.
2. Cut valve off as dose to tank as possible. Push remaining
portion back into tank.
3. Tip tank on end and BE SURE all water is drained from
bag.
4. Carefully remove bag ring (Tom lip on tank opening and
push bag ring back into tank; reach in around it and re-
move cut off portion of valve from tank.
5. Wipe a thin film of soapy solution on replacement valve
and from inside tank insert in hole in top of tank.
6. Pull valve through hole with pliers or a valve tool (avail-
able at your local filling station or Automotive Center).
7. Follow steps 14 through 20 under "Vinyl Bag Removal",
Page 7, to reinstall bag in tank.
Testing for Bag Leakage
1. Follow steps 1 through 4 under "Vinyl Bag Removal _,
Page 7.
2. Tip tank on end, valve down. Be careful not to break
valve!
3. If bag leaks, water will run out of valve. If so, replace bag
as instructed above.
DISASSEMBLY AND
ASSEMBLY OF PUMP
[_.WARNINGj Risk of electric shock. Ground unit and
3
disconnect power before attempting any work on
pump or motor.
Your Sears pump is designed for ease in servicing. Should
repair or replacement of the motor or seal be needed, the
pump and piping do not need to be disconnected or dis-
turbed.
1. Disassemble pump as follows:
A. Disconnect power.
B. Drain pump by opening drain cock. Remove pressure
switch tubing from fitting on top of pump.
[AWARNING]To avoid serious injury, release all
pressure from system before attempting to remove
clamp from pump.
C. Remove damp, Key No. 10, Page 12.
D. Remove pump base mounting bolts. Motor assembly
and back half assembly of pump can be pulled away
from front half.
E. Remove"O°rings.
2. Reassembly of pump.
A. Clean _O _ rings and _O" ring grooves.
B. Lubricate "O"rings with petroleum jelly, and place in
grooves.
C. Slide pump halves together.
D. Clean inside of clamp. Place clamp around pump
halves. Alternately tighten clamp screw and tap clamp
around outside with plastic mallet. This will insure
proper seating of _O" ring and damp.
E. Assemble base mounting bolts. Connect pressure
switch tubing and close drain cock.
F. Prime pump and turn on power.
G. Check for leaks.
Removing Motor for Service
and Replacing Shaft Seal
flit is necessary to separate motor and seal plate, always re-
place the shaft seal. We suggest you purchase this item,
U1096A, and have it on hand for future use.
NOTICE: The seal consists of two parts, a rotating member
and a ceramic seat. The surfaces of the seal are easily dam-
aged. Read instructions carefully.
1. Disassemble pump per instructions above.
2. Remove diffuser and impeller as follows (Key Nos. 8 and
9, Page 12).
A. Remove screws holding diffuser.
B. Loosen two screws and remove motor canopy from
motor.
C. Place 7/16" open end wrench on motor shaft fiat.
D. Turn impeller counterclockwise when facing it.
3. Remove pump back half from motor by unscrewing four
(4) nuts. Pry back half off motor by inserting two (2)
screwdrivers between the back pump half and the motor
flange. This will force rotating portion of seal off shaft.
See Figure 5.
)
Figure 5
4750194
8

MAINTENANCE
4. Place back half of pump on flat surface and tap out ce-
ramic seat. See Figure 6. I. Screw impeller on shaft (clockwise) while holding
shaft with 7/16" open end wrench on shaft flats. This
will automatically locate seal in place. See Figure 8.
r_9
4790194
Figure 6
5. Clean seal cavity.
6. Install new seal.
A. Clean polished surface of ceramic seat with clean
cloth.
B. Wet outer edge of =O" Ring with detergent solution.
C. With finger pressure press seat firmly and squarely
into cavity. See Figure 7A. Polished face of seat faces
inside of pump. If seat will not locate properly, place
cardboard washer over polished face and use piece of
3/4" standard pipe for pressing purposes. See Figure
7B.
4770t94
Figure 7A Figure 7B
483 0t94
D. Dispose of cardboard washer and clean surface of
seat.
E. Clean motor shaft.
F. Reassemble back haft of pump to motor.
G. Apply detergent solution to inside diameter of rotat-
ing seal member.
H. Slide rotating member on shaft until rubber drive ring
hits shaft shoulder. NOTICE: BE SURE you do not chip
or scratch seal face on shaft shoulder or seal will leak!
478 0194
Figure 8
J. Remount diffuser on seal plate.
Cleaning Impeller
1. Follow steps 1A through 1E under =Disassembly and
Assembly of Pmnp" on Page 8.
2. Remove diffuser and impeller from pump per instruc-
tions under "Removing Motor for Service and Replacing
Shaft Seal" on Page 8.
3. Clean impeller and reassemble impeller and diffuser per
instructinns under =Removing Motor for Service and
Replacing Shaft Seal" on Pages 8and 9.
Cleaning Shallow Well Jet
To remove debris from venturi or nozzle, proceed as fol-
lows:
1. Disassemble pump per instructions on Page 8.
2. Turn venturi counterclockwise and remove it. The noz-
zle is now exposed. Remove it using a 5/8" hex socket
wrench with extension. Turn counterclockwise. If
socket wrench is not available, insert an ice pick or sim-
ilar pointed tool carefully into the nozzle. This will dis-
lodge debris.
3. Flush out the debris by running water through the noz-
zle in the same direction as the dislodging tool was in-
serted.
4. Reinstall nozzle and venturi. Do not overtighten!
5. Reassemble pump per instructions on Pages 8 and 9.
9

HELPFUL HINTS
How to Handle a Gaseous Well
In some areas well water contains gases which must be al-
lowed to escape before the water is used. This can be done
as shown in Figure 9.
A good way of delivering gas-free water is to suspend a pipe,
closed at the bottom and open at the top, surrounding the
suction pipe. Since the gases rise in the well casing, the
water sucked down through the pipe and into the suction
pipe is free of gas. This type of well must be vented to the
outside of any enclosure.
Gases
ritmto
su_ace
pipesleeve
Not
to valve
Scale
cap
Figure9
10

TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSES REMEDIES
Motor will not run 1. Disconnect switch is off 1. Be sure switch ison
2. Fuse is blown 2. Replace fuse
3. Starting switch isdefective 3. Replace starting switch
4. Wires at motor are loose, 4. Refer to instructionson wiring
disconnected, or wired incorrectly
*5. Motor iswired incorrectly 5. Refer to instructionson wiring
6. Pressure switch contacts are airty 6. Clean by sliding piece of plain paper between contacts
Motor runs hot and "1. Motor iswired incorrectly 1. Refer to instructionson wiring
ovedoad kicks off 2. Voltage istoo low 2. Check with power company. Install heavier wiring
ifwire size istoo small. See wiringinstructions
3. See section below on too frequent cycling
Motor runs but no 1. In new installation:
water is delivered
(*Note: Check
prime before look-
ingfor other
causes. Unscrew
primingplug and
see ifthere is water
in priming hole)
Pump does not
deliver water to full
capacity (also check
point3 immediately
above)
Pump pumps water
but does not shut off
Pump cycles too
frequently
Air spurtsfrom
faucets
Leaksat themetal
clamp
I_.WARN!NG ]
Release all pressure
in system before
working on clamp!
3. Pump cycles too frequently
"1. Pump in a new installation did
not pick up prime through:
a. Improper priming
b. Air leaks
c. Leaking foot valve
*2. Pump has lost its prime through:
a. Air leaks
b. Water level below suction of pump
3. Jet or impeller is plugged
4. Check valve or foot valve is stuck
in closed position
5. Pipes are frozen
6. Foot valve and/or strainer are
buried in sand or mud
1. Water level in well is lower than
estimated
2. Steel piping (if used) is corroded or
limed, causing excess friction
3. Offset piping is too small in size
1. Pressure switch is out of adjustment
or contacts are "frozen"
2. Faucets have been left open
3. Jet or impeller is clogged
4. Motor is wired incorrectly
5. Water level in well is lower than
estimated
1. Pipes leak
2. Faucets or valves are open
3. Foot valve leaks
4. Pressure switch is out of adjustment
5. Air charge too low in
Captive Air_ Tank
1. Pump is picking up prime
2. Leak in suction side of pump
3. Welt is gaseous
4. Intermittent over-pumping of well
1. Loose clamps or "O" ring
not sealed
a. Re-prime according to instructions
b. Check all connections on suction line and jet
c. Replace foot valve
2. In installation already in use:
a. Check all connections on suction:line, jet and shaft sea
b. Lower suction line into water and re-prime. If receding
water level in a shallow well operation exceeds
suction lift, a deep well pump is needed
3. Clean jet or impeller according to instructions
4. Replace check valve or foot valve
5. Thaw pipes. Bury pipes below frost line. Heat pit or
pump house
6. Raise foot valve and/or strainer above well bottom
1. Adeep well jet pump may be needed (over 20 ft. to water
2. Replace with Plastic Pipe where possible, otherwise with
new steel pipe
3. Use larger offset piping
1. Adjust or replace pressure switch
2. Close faucets
3. Clean jet or impeller
4. Refer to instructionson wiring
5. Check possibility of using a deep well jet pump
1. Check connections, reptace pipe fittings
2. Close faucets or valves
3. Replace foot valve
4. Adjust or replace pressure switch
5. Disconnect electrical power and open faucets until all
pressure is relieved. Using automobile tire pressure
gauge, check air pressure in tank at the valve stem
located at top of tank. If less than 40 pounds, pump air
into tank from outside source, until 40 pounds pressure
is reached. Check air valve for leaks, using soapy
solution, and replace core if necessary
1. As soon as pump picks up prime, all air will be ejected
2. Check suction piping, make sure joints are not sucking a==
3. Change installation as described in manual
4. Lower foot valve if possible, otherwise restrict discharge
side of pump
1. First check the clamp tightening screw to see if it is tight.
If it is tight and slight leakage still occurs, place a piece
of wood on the periphery of the clamp and firmly tap the
wood with a hammer. Repeat this operation around the
edge of the clamp and retighten the clamp screw. If leak
continues, disassemble cramp and pump halves and
check to see that "(:7' ring is properly seated and no
foreign material is on "O" ring or "O" seat.
Reassemble pump.
t]

REPAIR PARTS
Pump Only - Model 390.252158
28
30
29
1
/
26 _25
23
11
4
23
5871193
6
7
8
16 17 \
1C
24
19
10
2O
22 21
: : To Orde_ _o_lde the U.S.Ao, Call
YoUr i_ai _rs Service Center or Store i
]2

REPAIR PARTS
Key Model 390.252158 Part
No. 1/2 HP Description
1"* J218-953C
1A
1B
lC
1D
1E
2
3*
4
5
6
7
8
9
10
11
12
13
14
15
16
16
17
18
19
20
21"
22
23
24
25
26*
26A
27
28
29
30
U18-1103
U18-1180
U18-1098
U18-128
U18-526
C69-2
U78-107PT
WC78-41T
L176-47P
U9-399
U109-6A
J105-40PE
J1-39P
C19-54SS
U9-201
N32P-66
N34P-19
N76-29P
J20-18
N176-28P B
N76-28P
U37-673P
U111-212T
U9-226
N166-5P
WC78-41T
U212-68T
U30-742SS
U30-542SS
C4-42P
U36-37ZP
U43-t 1ZP
C35-11
2782
U36-112ZP
L43-5C
Motor -1/2 HP - 115/230V -60 Cycle
(Includes Key Nos. 1A through 1E)
Overload Protector
Terminal Board
Contactor
Govemor
Capacitor
Water Slinger
Reducer Bushing - 1/2" x 1/8" NPT
Pipe Plug - 1/8" NPT
Tank Body (Back Half)
"O" Ring - Tank Body - 9-1/2" x 9" x 1/4"
Shaft Seal
Impeller
Diffuser
Clamp -Tank Body
=0_Ring-Venturi-1-_8"xI-I/8"xI/8"
Ventud
Nozzle
Insed
Gasket
Tank BodyAssembly (Front Half -Includes
Key No's. 11, 12, 13, 14, 15, 16, 19, 20, 21, 23 and 24)
Tank Body Only -Front Half
Switch Tube
90° Hose Barb
"O" Ring -Check Valve -2-1/4" x 2"x 1/8"
Check Valve
Pipe Plug-1/8"NPT (2 Required)
Dreincock -1/4" NPT
Screw - #10 - 16 x 1-1/8" (4 Required)
Screw -#8 - 32 x 7/8" (5 Required)
Base
Nut -5/16"- 18 Hex Head (4 Required)
Lockwasher (4 Required)
Motor Pad
Pressure Switch
Locknut-1/2"
Conne_or
*Standard hardware item, may be purchased locally.
** For repair or service to motors, always give the motor model number.
]3

REPAIR PARTS
Tank Only - Model 390.252158
¢.b.-di _,\..._
7
5
I
I
/
2
3
REPAIR PARTS
Model 390,252158
Key 1/'2HP Qty.
No. Part Number Used Description
1 29135 1Tank Assembly (Includes Diaphragm, Elbow,
Valve, Nuts, Washers, & Inlet Flange)
2
3
4
5
6
7
U20-13 1
U212-160 1" 1
U31-446P 1
U36-202BT 1` 6
U78-777PA 1" 1
U19-55SS 2
U74-37H- 1
U78-777P 1
Bag - Vinyl
AirValve w/Cap
Inlet Flange
Nut - 5/16-18 Hex
Adapter - 1" NPT (Male) x 1" Insert
Clamp
Hose - 1"x 24-1/2"
Adapter - 1" Pipe to 1" NPT
• Not illustrated.
1-Standard hardware item, may be purchased locally.
14

15

SEARS
OWNER'S
MANUAL
Model NO.
390.252158
The model number of
your Shallow Well Water
Systemwill be found on
the pump body.
When requesting service
or ordering parts, always
give the following
information:
•Product Type
•Model Number
• Part Number
• Part Description
I:RRFTSMRN
PROFESSIONAL
1/2 HP SHALLOW WELL
WATER SYSTEM
Fortherepairorreplacementpartsyou,need
Call7 am- 7 pro,7 daysaweek
1-8OO-366-PART
(1-800-366-7278)
Forin-homemajorbrandrepairservice
Call24 hoursa day,7 claysa week
1-800-4-REPAIR
(1-800-473-7247)
Forthe locationof a
SearsRepairServiceCenterin yourarea
Call24 hoursa day,7 daysa week
1-800-488-1222
Forinformationonpurchasinga Sears
MaintenanceAgreementortoInquire
aboutanexistingAgreement
call9 am- 5 pm, Monday-Saturday
1-800-827-6655
SEARS
An_ica'sRepa_Specia/_ts
Sears, Roebuck and Co., Hoffman Estates, IL60179 U.S.A.