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Craftsman SEARS 390.251483 Owner's Manual page 9

Shallow well jet pump

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TROUBLESHOOTING
CHART
PROBLEM
POSSIBLE
CAUSES
REMEDIES
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.
disconnected,
or wired
incorrectly.
.
Check
and tighten
all wiring.
5. Pressure
switch
contacts
are dirty.
5. Clean
by sliding
piece
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 secUon
below
on too frequent
cycling.
Motor
runs but no
1. In new installation:
water
is delivered.
Pump does not
deliver
water
to full
capacity
(also check
point
3 immediately
above).
Pump
pumps
water
but does not shut off.
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
orimpeller
is plugged.
4. Check valve or foot valve is stuck
in closedposition.
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,
caus'mg
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. Water
level in well is lower
than
estimated.
5. Motor
is wired
incorrectly.
I. Standard pressure
tank is water-
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 390.251483
and Model
390.251883
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
clamps,
not sealed.
_
WARNING I
Re{_a._all pressurein system
before working on clamp.
a. Re-prime
according
to instructions.
b. Check
all connections
on suction
line, air volume
conrail,
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 fm)t 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 steed 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 talxk to air volume
control
tapping.
Check
air
volume
control
for defects.
Check
for air leaks at any
connection.
2. Check
cotmections.
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.
ff 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 :ks pump
picks
up prime,
all air will he 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 arotmd
clamp
with
hammer
on a wooden
block.
Retighten
clamp
screw.
4. Check
()-Ring
for proper
seating
and/or
dirt on
O-Ring or seat.

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