Sears Craftsman Shallow Well Jet Pump Troubleshooting & Parts for Water Pumps

TROUBLESHOOTING CHART

PROBLEM				POSSIBLE			CAUSES
Motor	will	not	run.	1.	Disconnect			switch		is off.
				2.	Fuse is	blown.
				3.	Starting	switch			is	defective.
				4.	Wires	at	motor		are loose,
					disconnected,				or	wired incorrectly.
				5.	Pressure		switch		contacts		are dirty.
Motor	runs	hot	and	1.	Motor	is	wired		incorrectly.
overload	kicks		off.	2.	Voltage	is		too	low.
				3.	Pump	cycles too				frequently.
Motor	runs	but	no	1.	Pump	in	a	new	installation		did
water is delivered.					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.

Pump

does not

1. Water

level

in well

is

lower

than

deliver

water

to full

estimated.

capacity

(also

check

2.

Steel

piping

(if

used)

is corroded

or

point

3

immediately

limed,

causing

excess

friction.

above).

3.

Offset

piping

is

too

small

in

size.

Pump pumps

water

1.

Pressure switch

is

out

of

adjustment

but

does

not

shut off.

or contacts

are

"frozen".

2.Faucets have been left open.

3.Jet or impeller is clogged.

4.Water level in well is lower than estimated.

5.Motor is wired incorrectly.

Pump cycles too	1. Standard	pressure	tank	is water-
frequently.	logged	and has	no air	cushion.

2.Pipes leak.

3.Faucets or valves are open.

4.Foot valve leaks.

5.Pressure switch is out of adjustment.

6.Air charge too low in Captive Tank. Model 390.2514

and Model 390.2518 require

40 pounds for proper operation.

Air spurts from	1.	Pump	is picking	up	prime.
faucets.	2.	Leak	in suction	side	of pump.

3.Well is gaseous.

4.Intermittent over-pumping of well.

Leaks at the	metal	1. Loose clamps or O-Ring
damps.		not sealed.
AWARNING]
Release all pressure in system
before working	on clamp.

REMEDIES

1.Be sure switch is on.

2.Replace fuse.

3.Replace starting switch.

4.Refer to instroctions on wiring.

Check and tighten all wiring.

5.Clean by sliding piece of plain paper between contacts.

1.Refer to instructions on wiring.

2. Check with power company. Install heavier wiring if wire size is too small. See wiring instructions.

3.See section below on too frequent cycling.

1.In new installation:

a.Re-prime according to instructions.

b.Check all connections on suction line, air volume

control, and jet.

c.Replace foot valve.

2.In installation already in use:

a.Check all connections on suction line, air volume control, jet and shaft seal.

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.A deep 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.Check for possibility of using a deep well jet pump.

5.Refer to instructions on wiring.

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

volume control for defects. Check for air leaks at any connection.

2. Check connections.

3.Close faucets or valves.

4.Replace foot valve.

5.Adjust or replace pressure switch.

6.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 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.

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

2.Check suction piping.

3.Change installation as described in manual.

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

1.Release all system pressure before working on clamp.

2.Check that clamp is tight.

3.Tap around clamp with hammer on a wooden block.

Retighten clamp screw.

4.Check O-Ring for proper seating and/or dirt on

O-Ring or seat.

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