Sears CRAFTSMAN 390.251882 - User Manual

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OWNER’S

MANUAL

MODEL NO.

390.251482

390.251882

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

• Troubleshooting

• Repair Parts

PRINTED IN U.S.A.

PROFESSIONAL

“HYDROGLASS”

®

SHALLOW WELL JET PUMP

®

Form No. F642-9803 (Rev. 6/5/98)

Table of Contents

Questions and Answers

H
hmeltonAug 16, 2025
Why does my Sears CRAFTSMAN 390.251882 Water Pump cycle too frequently?
- A
  Amanda JohnsonAug 16, 2025
  Frequent cycling of your Sears Water Pump can occur for several reasons: * If you have a standard pressure tank, it may be water-logged and has no air cushion. Drain the tank to the air volume control tapping to resolve this. * Check the connections. * Make sure that all faucets or valves are closed. * The foot valve may need replacement. * The pressure switch may need adjustment or replacement. * If you have a Captive Air® Tank (Models 390.251482 and 390.251882), ensure it has the correct air charge (40 pounds). To check, disconnect electrical power, open faucets to relieve pressure, and use a tire pressure gauge at the valve stem on top of the tank. If low, add air until the proper pressure is reached. Check for leaks with a soapy solution and replace the core if needed.
E
Eric LewisAug 19, 2025
What to do if Sears CRAFTSMAN 390.251882 Water Pump pumps water but does not shut off?
- B
  Barbara FloresAug 19, 2025
  If your Sears Water Pump continues to pump water and doesn't shut off, consider these possible solutions: * The pressure switch may be out of adjustment or the contacts may be “frozen”. Try adjusting or replacing the pressure switch. * Ensure all faucets are closed. * The jet or impeller may need cleaning. * Consider whether a deep well jet pump is needed. * Refer to the wiring instructions.
N
Natasha PetersAug 23, 2025
How to fix a Sears CRAFTSMAN 390.251882 Water Pump when the motor will not run?
- J
  Jessica PerezAug 23, 2025
  If the motor of your Sears Water Pump will not run, try the following: * Ensure the switch is turned on. * Replace the fuse. * Replace the starting switch. * Refer to the wiring instructions and check and tighten all wiring. * Clean the contacts by sliding a piece of plain paper between them.
D
dunnduaneAug 27, 2025
Why Sears CRAFTSMAN 390.251882 Water Pump doesn't deliver water to full capacity?
- B
  Brenda OwenAug 27, 2025
  If your Sears Water Pump isn't delivering water to its full capacity: * A deep well jet pump may be needed if the water level is over 20 ft. * If steel piping is used, corrosion or lime buildup could be causing excess friction. Replace it with plastic pipe where possible, or with new steel pipe. * Try using larger offset piping.
T
tylerstoneAug 31, 2025
Why does my Sears CRAFTSMAN 390.251882 motor run hot and overload kicks off?
- A
  Annette PowersAug 31, 2025
  If your Sears Water Pump motor runs hot and the overload kicks off: * Refer to the wiring instructions. * Check with the power company. If the wire size is too small, install heavier wiring. See the wiring instructions for guidance. * See the section on too frequent cycling.
J
Jason DavisSep 3, 2025
Why air spurts from faucets with my Sears CRAFTSMAN 390.251882?
- E
  Edward EvansSep 4, 2025
  If you're experiencing air spurts from the faucets connected to your Sears Water Pump: * As soon as the pump picks up prime, all air will be ejected. * Check the suction piping for any leaks on the suction side of the pump. * Consider changing the installation as described in the manual. * Lower the foot valve if possible; otherwise, restrict the discharge side of the pump.
D
Dr. Theresa Young DDSSep 7, 2025
What to do if leaks at the metal clamps of Sears CRAFTSMAN 390.251882 Water Pump?
- A
  Amy LynchSep 7, 2025
  If there are leaks at the metal clamps of your Sears Water Pump: * Ensure all system pressure is released before working on the clamp. * Check that the clamp is tight. * Tap around the clamp with a hammer on a wooden block, then retighten the clamp screw. * Inspect the O-Ring for proper seating and check for any dirt on the O-Ring or seat.
J
Jeremy CarterNov 11, 2025
What to do if my Sears Water Pump runs but no water is delivered?
- D
  dbrownNov 11, 2025
  If your Sears Water Pump runs but no water is delivered, there could be several reasons: * If it’s a new installation, the pump may not have picked up prime due to improper priming, air leaks, or a leaking foot valve. In this case, re-prime according to instructions, check all connections on the suction line, air volume control, and jet, and replace the foot valve if necessary. * If the pump has lost its prime, check for air leaks in the suction line, air volume control, and jet. Also, ensure the water level is not below the suction of the pump; lower the suction line into the water and re-prime. If the water level in a shallow well exceeds the suction lift, a deep well pump is needed. * Additionally, clean the jet or impeller, replace the check valve or foot valve, thaw any frozen ...

Summary

Read and Follow Safety Instructions

Electrical Safety

Safety precautions related to electrical connections for the pump.

General Safety

General safety guidelines for pump operation and maintenance.

Rules for Safe Installation and Operation

Recommended Fusing and Wiring Data

Electrical

Wiring Connections

Instructions and precautions for making electrical wiring connections.

Installation; Operation

Installation

Step-by-step instructions for installing the shallow well jet pump.

Operation

Troubleshooting Chart

Sears CRAFTSMAN 390.251882 Specifications

General

Brand	Sears
Model	CRAFTSMAN 390.251882
Category	Water Pump
Language	English

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