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TROUBLESHOOTING CHART

9

SYMPTOM

POSSIBLE CAUSE(S)

CORRECTIVE ACTION

Motor will not run

1. Disconnect switch is off

1. Be sure switch is on

2. Fuse is blown

2. Replace fuse

3. Starting switch is defective

3. Replace starting switch

4. Wires at motor are loose, 

4. Refer to instructions on wiring. Check and tighten all wiring. 

disconnected, or wired incorrectly

5. Motor is wired incorrectly

5. Refer to instructions on wiring

6. Pressure switch contacts are dirty

6. Clean by sliding pieces of plain paper between contacts

Motor runs hot and  1. Motor is wired incorrectly

1. Refer to instructions on wiring

overload kicks off

2. Voltage is too low

2. Check with power company. Install heavier wiring if wire 

size is too small. See wiring instructions

3. Pump cycles too frequently

3. See section below on too frequent cycling

Motor runs but no

1. Pump in new installation did 

1. In new installation:

water is delivered

not pick up prime through: 
a. Improper priming 

a. Re-prime according to instructions

b. Air leaks

b.  Check all connections on suction line, air volume control, and jet

c. Leaking foot valve

c. Replace foot valve

2. Pump has lost prime through:

2. In installation already in use:

a. Air leaks

a. Check all connections on suction line, air volume control, 

jet and shaft seal

b. Water level below suction 

b. Lower suction line into water and re-prime. If receding water level 

of pump

in well exceeds suction lift, a deep well pump is needed

3. Jet or impeller is plugged

3. Clean jet or impeller according to instructions

4. Check valve or foot valve is stuck 

4. Replace check valve or foot valve

in closed position

5. Pipes are frozen

5. Thaw pipes. Bury pipes below frost line. Heat pit or pump house.

6. Foot valve and/or strainer are 

6. Raise foot valve and/or strainer above well bottom

buried in sand or mud

Pump does not 

1. Water level in well is lower than 

1. A deep well jet pump may be needed (over 20 ft. to water)

deliver water to full

estimated

capacity (Also

2. Steel piping (if used) is corroded or 

2. Replace with plastic pipe where possible, otherwise with  

check point 3

limed, causing excess friction

new steel pipe

immediately above)

3. Offset piping is too small in size

3. Use larger offset piping

Pump pumps water 1. Pressure switch is out of adjustment

1. Adjust or replace pressure switch

but does not shut 

or contacts are “frozen”

off

2. Faucets have been left open 

2. Close faucets

3. Jet or impeller is clogged

3. Clean jet or impeller

4. Water level in well is lower than

4. Check possibility of using a deep well jet pump

estimated

5. Motor is wired incorrectly

5. Refer to instructions on wiring

Pump cycles too 

1. Standard pressure tank is water- 

1. Drain tank to air volume control tapping. Check air volume control for

frequently

logged and has no air cushion

defects. Check for air leaks at any connection

2. Pipe leak 

2. Check connections

3. Faucets or valves are open

3. Close faucets or valves

4. Foot valve leaks

4. Replace foot valve

5. Pressure switch is out of adjustment

5. Replace pressure switch

6. Air charge too low in SEARS

6. Disconnect electrical power and open faucets until all pressure is 

Captive Air

®

Tank

relieved. Using automobile tire pressure gauge, check air pressure in 
tank at the valve stem located at top of tank. If air pressure is lower, 
pump air into tank from outside source until proper air pressure is 
reached. Check air valve for leaks, using soapy solution, and replace 
core if necessary.

Air spurts from

1. Pump is picking up prime

1. As soon as pump picks up prime, all air will be ejected

faucets

2. Leak in suction side of pump

2. Check suction piping

3. Well is gaseous 

3. Change installation as described in manual

4. Intermittent over-pumping of well

4.  Lower foot valve if possible, otherwise restrict discharge side of pump

Summary of Contents for 390.250252

Page 1: ...tructions 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 Maintenance Repair Part...

Page 2: ...l current supply agree with the motor wiring as shown on motor nameplate 10 The correct fusing and wiring sizing is essential to proper motor operation Use recommended fusing and wire size data in the...

Page 3: ...sediment may clog it Before installing foot valve check to see that it work freely When using a foot valve a priming tee and a plug as shown in Figure 1 is recommended Be sure the total lift from the...

Page 4: ...ed if horizontal piping is 25 ft or more Drive Coupling Check Valve Driven Point 1 1 4 Steel Drive Pipe Priming Tee To Service Pressure Switch From Well Built in Check Valve Plastic pipe Adapter Air V...

Page 5: ...e the 1 8 pipe plug Key No 15 Page 10 on the jet portion of the pump body near the check valve Insert a 1 8 compression fitting into this tapping Cut tubing to length and assemble the two fittings in...

Page 6: ...motor connect ground screw in switch to motor ground screw Use a solid copper wire at least as large as power supply wires Connect ground wire to grounded lead in service panel metal underground water...

Page 7: ...3 Carefully tap diffuser to remove from seal plate 4 Remove canopy from end of motor 5 Partially unscrew capacitor clamp move capacitor to one side 6 Hold motor shaft with 7 16 wrench on the flats on...

Page 8: ...p body 3 Insert an ice pick or other small diameter pointed tool through the venturi and into the nozzle This will dislodge foreign material 4 Foreign material will drop to the bottom of the pump body...

Page 9: ...uried in sand or mud Pump does not 1 Water level in well is lower than 1 A deep well jet pump may be needed over 20 ft to water deliver water to full estimated capacity Also 2 Steel piping if used is...

Page 10: ...76 21TF 1 Pump Body Assembly 14 N212 12P 1 Check Valve 15 U78 56CT 1 Pipe Plug 1 8 NPT Square Head 16 U78 57CT 1 Pipe Plug 1 4 NPT Square Head 17 U30 75ZP 4 Capscrew 3 8 16x1 1 4 Hex Head 18 U37 672P...

Page 11: ...ing Elbow 1 4 NPT 39 U111 100T Compression Fitting Straight 1 8 NPT Standard hardware item May be purchased locally Sears Shallow Well Jet Pump Air Volume Control Package Not Furnished Must be purchas...

Page 12: ...bout an existing Agreement call 9 am 5 pm Monday Saturday 1 800 827 6655 M A I N T E N A N C E A G R E E M E N T America s Repair Specialists REPAIRSERVICES America s Repair Specialists REPAIRSERVICES...

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