Sears 390.26280 User manual

OWNER’S
MANUAL
Model No.
390.26280
390.26290
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
• Operation
• Service Hints
• Repair Parts
PRINTED IN U.S.A.
SELF-PRIMING
POOL FILTER PUMP
Form No. F642-6189 (Rev. 4/24/96)

2
FULL ONE YEAR WARRANTY
For one year from 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 or replacement parts necessary because of abuse or negligence including failure
to install, adjust and oeprate this pump according to the instructions in the owner’s manual.
LIMITATION OF LIABILITY
SEARS WILL NOT BE LIABLE FOR LOSS OR DAMAGE TO PROPERTY OR ANY INCIDENTAL OR CONSEQUENTIAL
LOSS OR EXPENSE FROM PROPERTY DAMAGE DUE DIRECTLY OR INDIRECTLY FROM THE USE OF THIS PROD-
UCT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
WARRANTY SERVICE IS AVAILABLE BY SIMPLY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPART-
MENT IN THE UNITED STATES.
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
CONTENTS
INTRODUCTION.............................................................2
WARRANTY.....................................................................2
SAFETY INSTRUCTIONS.................................................3
INSTALLATION................................................................4
ELECTRICAL....................................................................5
OPERATION..................................................................6-7
STORAGE/WINTERIZING ............................................6-7
PUMP SERVICE.............................................................8-9
TROUBLESHOOTING GUIDE .......................................10
PARTS LIST AND ILLUSTRATION .................................11
INTRODUCTION
Please read our instructions before installing and using
your pump. This will help you obtain full benefits of the
quality and convenience built into this equipment. It will
also help you avoid any needless service expense result-
ing from causes beyond our control and cannot cover in
our warranty.

3
1. ReadtheseRules andtheInstructionscarefully.Failure
to follow them could cause serious bodily injury
and/or property damage.
2. See Pages 4 and 5 for electrical hookup instructions.
WirepumpthroughaGroundFaultCircuitInterrupter
(GFCI - required by the National Electrical Code for
abovegroundpools).AGFCI isavailablefromthe Sears
Electrical Department.
RULES FOR SAFE INSTALLATION AND OPERATION
READ AND FOLLOW
SAFETY INSTRUCTIONS!
Always follow basic safety precautions with this
equipment, including the following.
This is the safety-alert symbol. When you see this sym-
bol on your pump or in this manual, look for one of the fol-
lowing signal words and be alert to the potential for
personal injury:
DANGER warns about hazards that will cause serious per-
sonal injury, death or major property damage if ignored.
WARNING warns about hazards that can cause serious
personal injury,deathormajor propertydamageifignored.
CAUTION warns about hazards that will or can cause
minor personal injury or property damage if ignored.
Thelabel NOTICE indicates special instructions whichare
important but not related to hazards.
To reduce the risk of injury, do not permit
children to use this product unless they are closely super-
vised at all times.
Carefully read and follow all safety instructions in
this manual and on pump.
Keep safety labels in good condition.
Replace missing or damaged safety labels.
This pump is for use with permanently in-
stalled pools and may also be used with hot tubs and spas
if so marked. Do not use with storable pools. A per-
manetnly installed pool is constructed in or on the ground
orinabuilding suchthat it maybe readilydisassembledfor
storage. A storable pool is constructed so that it may be
readilydisassembledforstorageand reassembledto itsorig-
inal integrity.
SAVE THESE INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS

4
Pump mount must:
Be solid - level - rigid - vibration free. (To reduce vibration
and pipe stress, bolt pump to mount.)
Allow pump inlet height to be as close to water level as
possible.
Allow use of short, direct suction pipe (to reduce friction
losses).
Allow for gate valves in suction and discharge piping.
Be protected from excess moisture and flooding.
Allow adequate access for servicing pump and piping.
NOTICE: Use Teflon tape or Plasto-Joint Stik1for making
all threaded connections to pump. Do not use pipe dope;
pipe dope will cause stress cracking in pump.
NOTICE: Pump suction and discharge connections have
molded-in thread stops. DO NOT try to screw pipe in be-
yond these stops. Tighten pump/trap fittings only as re-
quired to ensure tight connection (1-1/2 turns past hand
tight). Do not overtighten. Use care when using teflon
tape as friction is reduced considerably; do not over-
tighten connections or damage may occur.
Teflon Taping Instructions:
Use only new or clean PVC pipe fittings.
Wrap male pipe threads with one to two layers of teflon
tape, winding tape clockwise as you face start of thread.
Cover entire threaded portion of pipe.
DO NOT OVERTIGHTEN or tighten past thread stop in
pump port!
If leaks occur, remove pipe, clean off old tape, rewrap
with one to two additional layers of tape and remake con-
nection.
NOTICE: Support all piping connected with pump!
Piping
For pump discharge use 1-1/2" PVC pipe or reinforced
hose.
For pump suction on all models, use 1-1/2" reinforced
hose.
Increase size if a long run is needed. For pipe larger than
port, use reducing fitting in trap port.
To avoid pump strain, support suction and discharge in-
dependently. Place supports near pump.
To avoidstrainleftbyagapatlast connection, start all pip-
ing at pump and run pipe away from pump.
Never use suction pipe smaller than pump suction con-
nections.
No air leaks in suction pipe. Keep pipe straight. Suction
pipe inlet must be lower than pump inlet port.
NOTICE: To preventflooding whenremovingpumpfrom
service, all flooded suction systems must have gate valves
in suction and discharge pipes.
Use expansion joint or flexible piping. (Plastic pipe will
expand and contract as temperature changes.)
Fittings
Fittings restrict flow. For better efficiency use fewest pos-
sible fittings.
Avoid fittings that could cause an air trap.
Pool and spa fittings must conform to International
Association of Plumbing and Mechanical Officials
(IAPMO) standards.
Useanon-entrappingsuctionfitting inpoolordoublesuc-
tion (skimmer and main drain).
1 Lake Chemical Co., Chicago, Illinois.
INSTALLATION
Bonding Lug
1-1/2" Discharge Piping Strainer Basket Cover
1-1/2" Suction
Piping
Drain Plugs 983 0993
FIGURE 1

5
ELECTRICAL
Ground motor before
connecting to electrical
power supply. Failure to
ground pump motor can
cause serious or fatal elec-
trical shock hazard.
Do not ground to a gas
supply line.
To avoid dangerous or
fatal electrical shock,
turn OFF power to motor
before working on electri-
cal connections.
Ground Fault Circuit
Interrupter (GFCI) trip-
ping indicates electrical problem. If GFCI trips and
won't reset, consult electrician to inspect and repair
electrical system.
Fire hazard. Match supply voltage to motor
nameplate voltage.
Voltage
Voltage at motor must not be more than 10% above or
below motor nameplate rated voltage or motor may over-
heat, causing overload tripping and reduced component
life.Ifvoltage is lessthan90%oremorethan110%ofrated
voltage when motor is running at full load, consult power
company.
Grounding/Bonding
Install,ground,bondandwiremotor accordingtolocal or
National Electrical Code requirements.
Permanently ground motor. Use green ground terminal
provided under motor canopy or access plate (see Figure
2); use size and type wire required by code. Connect
motor ground terminal to electrical service ground.
Bond motor to pool structure. Use a solid copper con-
ductor, size No. 8 AWG (8.4 mm2)orlarger. Run wirefrom
external bonding lug (see Figure 2) to reinforcing rod or
mesh.
Connect a No. 8 AWG (8.4 mm2) solid copper bonding
wire to the pressure wire connector provided on the
motor housing and to all metal parts of swimming pool,
spa, or hot tub and to all electrical equipment, metal pip-
ing or conduit within 5 ft. (1.5m) of inside walls of swim-
ming pool, spa, or hot tub.
Wiring
Pump must be permanently connected to circuit. Table I,
Page 6, gives correct wire and circuit breaker sizes for the
pump alone. If other lights or appliances are also on the
same circuit, be sure to add their amp loads to pump amp
load before figuring wire and circuit breaker sizes. (If un-
sure how to do this or if this is confusing, consult a li-
censed electrician.) Use the load circuit breaker as the
master on-off switch.
InstallaGround FaultCircuitInterrupter(GFCI)in circuit;
it will sense a short-circuit to ground and disconnect
powerbeforeit becomesdangerousto poolusers.Forsize
of GFCI required and test procedures for GFCI, see man-
ufacturer’s instruction.
In case of power outage, check GFCI for tripping (which
will prevent normal pump operation). Reset if necessary.
NOTICE: If you do not use conduit when wiring motor,
be sure to seal wire opening on end of motor to prevent
dirt, bugs, etc., from entering.
FIGURE 2 - Typical ground screw and bonding
lug locations. FIGURE 3
Bonding
Lug
Motor Nameplate
Green
Ground
Screw
Motor
Canopy
Through
Bolts 349 0893
A
B
L2
L1
A
B
L2
L1
To convert dual-voltage motors
from 230 to 115 Volts:
Move white wire w/black
tracer from B to A.
Move black wire
from A to L1.
A
B
L2
L1
A
B
L2
L1
Clamp
power
cable
to prevent
strain on
terminal
screws.
White w/
Black Tracer
Black
Motor Ground
Screw
Connect ground wire
to motor ground screw
as shown.
Connect power supply wires
to the terminal board
as shown.
Ground
Wire
1410 1194
Disconnect power from
motor.
Move white wire w/black
tracer from B to A.
Move black wire
from A to L1.
WARNING
Hazardous voltage. Can
shock, burn, or cause
death.
Ground pump before con-
necting to power supply.

NEVER run pump dry.
Running pump dry
may damage seals, causing
leakage and flooding. Fill
pump volute and trap with
water before starting motor.
Do not add chemicals to
pool/spa system di-
rectly in front of pump suc-
tion. Adding undiluted
chemicals may damage
pump and voids warranty.
Before removing trap cover:
1. STOP PUMP before proceeding.
2. CLOSE GATE VALVES in suction and discharge
pipes.
3. RELEASE ALL PRESSURE from pump and piping
system.
If pump is being pressure tested, be sure pres-
sure has been released before removing trap
cover.
Do not block pump suction. To do so with body
may cause fatal injury. Small children using
pool must ALWAYS have close adult supervision.
NOTICE: Do not block pool return or spa jets. To do so
may flood area causing damage to equipment and sur-
rounding area.
Priming Pump
Open gate valves before starting system.
Releaseallair fromfilterand pipingsystem.Seefilterown-
er's manual.
In a flooded suction system (water source higher than
pump), pump will prime itself when suction and dis-
charge valves are opened.
If pump is not in a flooded suction system, unscrew and
remove trap cover; fill trap and pump with water.
Cleanand lubricate trap coverO-ring with petroleum jelly
each time it is removed.
Clean and inspect O-ring; reinstall on trap cover.
Replace trap cover on trap; turn clockwise to tighten
cover.
NOTICE: Tighten trap cover by hand only (no wrench-
es). Use a lever or lid wrench only if necessary to remove
cover.
Pump should prime. Priming time will depend on vertical
lengthofsuction liftandhorizontallengthof suctionpipe.
If pump does not prime within ten minutes, stop motor
and determine cause. Be sure all suction and discharge
valves are open when pump is running. See Troublesho-
oting Guide.
Storage / Winterizing
Explosion hazard. Purging the system
with compressed air can cause components to ex-
plode, with risk of severe injury or death to anyone
nearby. Use only a low pressure (below 5 PSI), high vol-
ume blower when air purging the pump, filter, or piping.
NOTICE: Allowing pump to freeze will void warranty!
NOTICE: Do not use anti-freeze solutions (except propy-
lene glycol) in your pool/spa system. Propylene glycol is
non-toxic and will not damage plastic system compo-
nents; other anti-freezes are highly toxic and may damage
plastic components in the system.
Drain all water from pump and piping when expecting
freezing temperatures or when storing pump for a long
time (see instructions below).
Gravity drain system as far as possible.
Protect areas which retain water with non-toxic propy-
lene glycol antifreeze (“RV antifreeze”).
Keep motor dry and covered during storage.
To avoid condensation/corrosion problems, do not cover
or wrap pump with plastic film or bags.
For outdoor/unprotected pump installations:
1. Enclose entire system in a weatherproof enclosure.
2. To avoid condensation/corrosion damage, allow venti-
lation; do not wrap system in plastic film.
3. Usea 40%propyleneglycol/60%watersolutiontopro-
tect pump to -50 degrees F.
6
OPERATION
Distance in Feet from Meter to Motor
0’ 101’ 201’
Max. Fuse to to to
Pump Load Rating 100’ 200’ 300’
Model HP Volts/Hz/Ph Amps Amps* Wire Size (AWG)
390.26280 1 115/60/1 14.0 20 12 10 8
230/60/1 7.0 15 14 14 14
390.26290 1-1/2 115/60/1 17.4 25 10 8 6
230/60/1 8.7 15 14 12 12
TABLE I - RECOMMENDED FUSING AND WIRING DATA
*Time delay fuse rating for motor circuits.
Hazardous suction.
Can trap hair or body
parts, causing severe in-
jury or death.
Do not block suction.

7
Draining Pump 1. Pump down water level
below all inlets to the pool.
To avoid dangerous or
fatal electrical shock
hazard, turn OFF power to
motor before draining
pump.
2. Remove trap cover and use
lowpressureairtoblowac-
cumulated water from the
piping system.
3. Cap inlet piping after drain-
ingtokeepwateroutof the
pipes.
4. Topreventpumpfromfreezing,removetrapcoverand
drain the tank body through the drain plug (Key No.
17, Page 11). Use a lid wrench to remove trap covers
that have been overtightened or have taken a set and
cannot be removed by hand. Clean pump thoroughly.
Replace trap cover.
5. Be sure motor is kept dry and covered.
Startup For Winterized Equipment
1. Remove any temporary weather protection placed
around system for shutdown.
2. Follow filter manufacturer’s instructions for reactiva-
tion of the filter.
3. Inspectallelectricalwiringfordamageordeterioration
over the shutdown period. Have a qualified service-
man repair/replace wiring as needed.
4. Inspect and tighten all watertight connections.
5. Open all valves in suction and return piping.
6. Remove any winterizing plugs in piping system.
7. Drain all anti-freeze from system.
8. Close all drain valves and replace all drain plugs in pip-
ing system.
9. Prime pump according to instructions on Page 6.
OPERATION
WARNING
Hazardous voltage. Can
shock, burn, or cause
death.
Disconnect power before
working on pump or motor.

Pump should only be serviced by qualified person-
nel.
Be sure to prime pump (Page 6) before starting up
after service.
Before removing or trap cover:
1. STOP PUMP before proceeding.
2. CLOSE GATE VALVES in suction and discharge
pipes.
3. RELEASE ALL PRESSURE from pump and piping
system.
To avoid dangerous or
fatal electrical shock
hazard, turn OFF power to
motor before working on
pump or motor!
Aside from lubricating trap
cover O-Ring, no lubrication or
regular maintenance is needed
beyondreasonablecareand pe-
riodic cleaning of the trap bas-
ket.
If shaft seal is worn or damaged, repair as follows:
Pump disassembly/Removing Old Seal:
Disconnect power supply to motor.
1. Disconnect electrical wire at motor. Close any gate
valves in the suction and discharge piping. Drain
pump. Remove pump hold down bolts. Disconnect
pipe unions or clamps adjacent to pump. Withdraw
complete pump/motor assembly.
2. Remove six screws (Key No. 3, Page 11) and withdraw
tank body (Key No. 19, Page 11). Remove tank body
O-Ring (Key No. 5, Page 11).
3. Pry off motor bearing cap, insert a screwdriver in the
slot at the end of the motor shaft to prevent it from
turningandunscrewtheimpeller(KeyNo.8,Page11).
Remove rotary portion of seal (Key No. 6, Page 11)
fromimpellersleeve.Removediffuser(KeyNo.7,Page
11).
4. Unscrew four motor throughbolts. Remove seal plate
(Key No. 4, Page 11). Remove stationary components
of seal (Key No. 6, Page 11) from seal plate.
Pump Reassembly/Installing New Seal:
1. Carefully examine the seal “L” cup and tank body
O-Ring(KeyNo.5,Page11). Replace ifmaterial shows
any sign of damage or deterioration.
2. Check the mechanical seal (Key No. 6, Page 11) for
scoring on the contact surfaces and also for any dam-
age to the spring or retainer. Replace seal if necessary.
3. Press the stationary components of the seal (“L” cup
and ceramic seat) into the seal plate (Key No. 4, Page
11) using finger pressure only. Make sure components
are firmly and evenly seated.
4. Align the tongue the diffuser with the groove in the
seal plate (Key No. 4, Page 11) and install the diffuser
(Key No. 7, Page 11).
5. Slidetherotaryportionoftheseal(KeyNo.6,Page11)
over the sleeve of the impeller (Key No. 8, Page 11)
until it butts against the impeller shroud.
6. Insert the impeller sleeve through the opening in the
seal plate (Key No. 4, Page 11).
7. Install the slinger (Key No. 2, Page 11) on the end of
the impeller sleeve.
8. Steps (3) through (7) result in subassembly of seal
plate,diffuser,impeller,sealandslinger(KeyNos.4,7,
8, 6, and 2 respectively, Page 11). Attach the sub-
assembly to the motor as follows:
i. Fit impeller sleeve over motor shaft.
ii. Align motor throughbolts with mounting holes in
seal plate (Key No. 4, Page 11).
iii. Insert a screwdriver in a slot at end of motor shaft
to prevent it from turning and screw on impeller
(Key No. 8, Page 11).
iv. Secure the four motor throughbolts making sure
that the seal plate (Key No. 4, Page 11) butts firmly
against the motor endbell.
9. InstallthetankbodyO-Ring(KeyNo.5,Page11)inthe
recess in the seal plate (Key No. 4, Page 11).
10. Fit the tank body (Key No. 19, Page 11). Install and
tighten six capscrews (Key No. 3, Page 11).
11. Replace motor bearing cap. Re-install pump. Re-con-
nect union couplings and electrical wiring.
8
PUMP SERVICE
WARNING
Hazardous voltage. Can
shock, burn, or cause
death.
Disconnect power before
working on pump or motor.

9
TROUBLESHOOTING GUIDE
Read and understand
safety and operating
instructions in this manual
before doing any work on
pump!
Only qualified person-
nel should electrically
test pump motor.
DISCONNECT POWER
TO MOTOR BEFORE
WORKING ON PUMP. Close
suction and discharge gate
valves.
FAILURE TO PUMP; REDUCED CAPACITY
OR DISCHARGE PRESSURE
Pump Loses Prime / Suction Leaks
1. Makesurethere are noleaksinsuctionpiping.Traplid
cover must be air tight.
2. Inspect trap O-ring for cuts or nicks. Replace if neces-
sary.Lubricate with petroleum jellybeforeinstallation.
3. Make sure suction pipe inlet to pump is well below
water level to prevent pump from sucking air.
4. Replace suction trap gasket if defective.
5. Suctionliftof6-8'(2-2.5m)willreduce performance.
Suction lift in excess of 8' (2.5m) will prevent pump-
ing and cause pump to lose prime. Move pump closer
(vertically)towatersource.Checksizeofsuctionpipe.
Pump Does Not Operate
1. Check and clean suction trap, impeller, fittings, or trap
strainer.
2. Check and clean pool filter.
3. Check for worn impeller or diffuser and replace.
4. Make sure gate valves are fully open.
5. Suction piping is too small.
6. Motor internal thermal overload protector is open.
Motor runs too hot. Turn power to motor off. Check
for proper voltage.
7. Check GFCI for proper operation according to GFCI
manufacturer's instructions.
Mechanical Troubles / Noise
1. Makesuresuctionanddischarge pipingaresupported.
2. Securely mount pump on concrete platform for qui-
etest performance.
3. Airleakin suctionline.Repairleak and tightentraplid.
4. Check pump impeller; clean out debris.
5. Cavitation -
Remove suction flow restrictions.
Increase pipe size.
Decrease number of fittings in suction piping.
Reduce flow by throttling discharge gate valve.
Electrical
1. Pump may be running too slowly; check voltage at
motor terminals and at meter while pump is running.
If low, see wiring instructions or consult power com-
pany. Check for loose connections.
2. Pump may be too hot.
A. Check line voltage. If less than 90% or more than
110% of rated voltage, consult a licensed electri-
cian.
B. Increase ventilation.
C. Reduce surrounding temperature.
D. Tighten any loose connections.
3. Motor internal thermal overload protector is open.
Motor runs too hot. Turn power to motor off. Check
for proper voltage. Check for proper impeller or im-
peller rubbing.
4. Circuit breaker trips repeatedly.
A. Breaker must be of adequate capacity.
B. For GFCI breaker, test according to GFCI manufac-
turer's instructions.
C. Make sure no other appliances or lights are on cir-
cuit.
D. Make sure there is only one GFCI on the circuit.
WARNING
Hazardous voltage. Can
shock, burn, or cause
death.
Disconnect power before
working on pump or motor.

10
REPAIR PARTS
• Not Illustrated.
Key Part 390.26280 390.26290
No. Description 1 H.P. 1-1/2 H.P.
1 Motor - 60 Cycle - 115/230V C218-313C C218-314C
1A Screw, #10-32 x 1/2” Lg. U30-692SS U30-692SS
1B Bonding Lug U17-568 U17-568
2 Water Slinger C69-23 C69-23
3 Capscrew, #10-24 x 5/8” Lg. (6 Req.) U30-152SS U30-152SS
4 Seal Plate 17140-0012 17140-0012
5 O-Ring 17140-0026 17140-0026
6 Shaft Seal U9-358SS U9-358SS
7 Diffuser 17140-0007 17140-0007
8 Impeller C105-226PC C105-226PD
9 Trap Cover C3-139P1 C3-139P1
10 Trap Cover O-Ring U9-229 U9-229
11 Trap Basket C108-33P C108-33P
12 Drain Plug 1/4” NPT U178-920P U178-920P
13 Flat Washer 5/16” (4 Req.) U43-41SS U43-41SS
14 Capscrew, 5/16-18 x 1-1/4” (4 Req.) U30-64SS U30-64SS
15 Lock Washer, 5/16” (4 Req.) U43-11SS U43-11SS
16 Trap Body C153-53P1 C153-53P1
17 Drain Plug 1/4” NPT WC78-40T WC78-40T
18 Gasket C20-123 C20-123
19 Tank Body C276-57P C276-57P
20 Bolt 3/8-16 x 1” Lg. (2 Req.) U30-74SS U30-74SS
21 Base 16920-0015 16920-0015
22 Flat Washer 3/8” SS (2 Req.) U43-42SS U43-42SS
• Owner’s Manual F642-6189 F642-6189
228 0893
1
1A 1B 23
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13
14
15
16
17
18
19
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To order parts, call:
Sears Product Service
1-800-366-7278

11

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.
390.26280
390.26290
The model number of
your Self-Priming Pool
Filter Pump will be found
on the Volute.
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.
SELF-PRIMING
POOL FILTER PUMP