Pacific hydrostar 47906 Installation manual

SHALLOW WELL PUMP
1 HP - Stainless Steel
47906
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©2002 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained
herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing improvements, actual product may
differ slightly from the product described herein. Tools required for assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Revised Manual 08i, 08k; 09f, 09k

Page 2For technical questions, please call 1-800-444-3353.SKU 47906
SAVE THIS MANUAL
Keep this manual for the safety warnings
and precautions, assembly, operating, inspec-
tion, maintenance and cleaning procedures.
Write the product’s serial number in the back
of the manual near the assembly diagram (or
month and year of purchase if product has no
number). Keep this manual and the receipt in
a safe and dry place for future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling, and
all other information provided with
this product:
This is the safety alert sym-
bol. It is used to alert you
to potential personal injury
hazards. Obey all safety mes-
sages that follow this symbol
to avoid possible injury or
death.
DANGER indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
WARNING indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
CAUTION, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
NOTICE is used to
address practices not
related to personal injury.
CAUTION, without the
safety alert symbol, is
used to address practices not
related to personal injury.
SAFETY WARNINGS AND
PRECAUTIONS
WARNING Read all safety warnings
and instructions. Failure to follow the
warnings and instructions may result
in electric shock, re and/or serious
injury.
Save all warnings and instructions
for future reference.
Read all instructions before use!
Keep work area clean1. . Cluttered areas
invite injuries.
Observe work area conditions2. . Do not
expose this pump to rain or submerge
in water. Keep work area well lighted.
Do not use electrically powered pumps
in the presence of ammable gases or
liquids.
Keep children away3. . Children must
never be allowed in the work area. Do
not let them handle Pump.
Use the right pump for the job4. . Do
not attempt to force a small Pump to
do the work of a larger industrial Pump.
There are certain applications for which
this Pump was designed. It will do the
job better and more safely at the rate for
which it was intended. Do not modify
this Pump and do not use this Pump for
a purpose for which it was not intended.
Dress properly5. . Do not wear loose
clothing or jewelry as they can be caught
in moving parts. Protective, electrically
non-conductive clothes and non-skid
footwear are recommended when work-
ing. Wear restrictive hair covering to
contain long hair.

Page 3For technical questions, please call 1-800-444-3353.SKU 47906
Use eye and ear protection6. . Wear
ANSI-approved impact safety goggles
and ear protection.
Do not overreach7. . Keep proper footing
and balance at all times. Do not reach
over or across running machines.
Maintain Pump with care8. . Keep Pump
clean for better and safer performance.
Inspect pump cords periodically; If dam-
aged, have them repaired by a qualied
technician.
Disconnect power9. . Unplug Pump when
not in use.
Stay alert10. . Watch what you are doing,
use common sense. Do not install Pump
when you are tired.
Check for damaged parts11. . Before us-
ing Pump, any part that appears dam-
aged should be carefully checked to
determine that it will operate properly
and perform its intended function. Check
for alignment and binding of moving
parts; any broken parts or mounting x-
tures; and any other condition that may
affect proper operation. Any part that is
damaged should be properly repaired or
replaced by a qualied technician.
Replacement parts and accessories12. .
When servicing, use only identical re-
placement parts. Use of any other parts
will void the warranty.
Do not install Pump if under the inu-13.
ence of alcohol or drugs. Read warn-
ing labels on prescriptions to determine
if your judgment or reexes are impaired
while taking drugs. If there is any doubt,
do not install the Pump.
RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS
(120 VOLT)
NAMEPLATE
AMPERES
(at full load)
EXTENSION CORD
LENGTH
25’ 50’ 100’ 150’
0 – 6 18 16 16 14
6.1 – 10 18 16 14 12
10.1 – 12 16 16 14 12
12.1 – 16 14 12 Do not use.
TABLE A
USE PROPER EXTENSION CORD.14.
Make sure your extension cord is in
good condition. When using an exten-
sion cord, be sure to use one heavy
enough to carry the current your prod-
uct will draw. An undersized cord will
cause a drop in line voltage resulting in
loss of power and overheating. Table A
shows the correct size to use depending
on cord length and nameplate ampere
rating. If in doubt, use the next heavier
gauge. The smaller the gauge number,
the heavier the cord.
Maintenance15. . For your safety, mainte-
nance should be performed regularly by
a qualied technician.
Pump clean water only.16. Do not use the
pump for any other application.
People with pacemakers should consult17.
their physician(s) before use. Electro-
magnetic elds in close proximity to
heart pacemaker could cause pacemak-
er interference or pacemaker failure.
The brass components of this product18.
contain lead, a chemical known to the
State of California to cause birth defects
(or other reproductive harm). (California
Health & Safety code § 25249.5, et seq.)
Do not operate this pump if the power19.
cord or electrical components are
damaged or the seals are compro-
mised. Do not plug in the power cord

Page 4For technical questions, please call 1-800-444-3353.SKU 47906
when wet or standing on damp or wet
ground. Exercise caution when work-
ing with electrical equipment in the
presence of water to maintain your
personal insulation to avoid shock.
Use GFCI (Ground Fault Circuit Inter-
rupter) outlets when using this pump.
WARNING: The brass components20.
of this product contain lead, a chemi-
cal known to the State of California to
cause birth defects (or other reproductive
harm). (California Health & Safety code §
25249.5, et seq.)
WARNING: Handling the cord on this21.
product will expose you to lead, a chemi-
cal known to the State of California to
cause cancer, and birth defects or other
reproductive harm. Wash hands after
handling.
(California Health & Safety Code §
25249.5, et seq.)
The warnings, cautions, and instruc-22.
tions discussed in this instruction
manual cannot cover all possible con-
ditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
UNPACKING
When unpacking, make sure the item is
intact and undamaged. If any parts are miss-
ing or broken, please call Harbor Freight Tools
at 1-800-444-3353 as soon as possible.
SPECIFICATIONS
Power Requirements 120 V~, 60 Hz, 1 HP
Motor Speed 3400 RPM
Discharge/Intake 1” NPT
Max. Flow 900 GPH
Max. Suction Lift 26’
Max. Total Head 164’
Tank Size 5 Gallons
Pump Body Material Stainless Steel
Cut-in Pressure 20 PSI
Cut-out Pressure 50 PSI
Note: Performance of this pump (if powered
by line voltage) may vary depending on
variations in local line voltage. Extension
cord usage may also affect pump perfor-
mance.
REV 07g; 08k; 09c

Page 5For technical questions, please call 1-800-444-3353.SKU 47906
INSTALLATION
Discharge
Intake
Pressure
Meter
Priming
Inlet
Air Valve
(hidden)
Fig. 1
WARNING! TO PREVENT SERIOUS INJURY
FROM ELECTRIC SHOCK:
Install indoors or in weather-proof well
house only. This Pump is non-submers-
ible.
Do not plug in the power cord when wet
or standing on damp or wet ground. Do
not plug in the power cord until instructed
to do so.
Note: ONLY pump clean water.
Note: Additional components (such as valves
and pipes) may be required for installa-
tion, but not included.
Note: Installation requires skilled workman-
ship and compliance with local building
codes. If you are not condent in your
ability to properly and safely install
this pump, have a qualied technician
perform the installation.
The water to be pumped must be clean1.
and must be free of sand and grit, which
would damage the pump and void the
warranty.
Foot
Valve
Check
Valve
Well
Seal
Shallow
Well Pump
To
Household
Water
System
Standing Water Level
(With Well Pump Off)
Pumping Water Level (with Well Pump Operating)
Outlet Water
Level
Vertical Well Lift
Head
SLOPE SLIGHTLY DOWNWARD TO WELL
Length of off-set line
(Add when calculating total suction
lift due to friction.)
Fig. 2
2. The illustration above shows an
example of a proper shallow well pump
installation. The total suction lift (vertical
well lift + length of off-set line) must not
exceed the Maximum Suction Lift listed
on the Specications chart.
Note: This pump is intended for shallow well
application only and is not intended to be
used as a booster pump.
Note: For optimal performance, install the
pump as close to the well head as pos-
sible.
Install a Foot Valve at the bottom of the3.
suction pipe. The Foot Valve must be
under the Pumping Water Level, the
level that the water falls to when the
pump operates.
Install a sterile Well Seal at the top of4.
the suction pipe to keep the well clean.
Protect from rust inside a frost-proof
enclosure.
REV 05l, 07g, 09d, 09e

Page 6For technical questions, please call 1-800-444-3353.SKU 47906
Intake and discharge pipes must be at5.
least 1” in diameter.
Lay an off-set line from the well to the6.
structure the pump will be installed in.
The off-set line should slope slightly
towards the well (see Fig. 2). Systems
with longer off-set lines should use larger
diameter pipe to improve efciency.
Install the pump on a rigid, level, dry7.
platform. This platform must provide a
solid, level surface that is capable of
supporting the weight of the pump and
attached piping lled with water. Do
not allow water to contact the pump’s
housing.
Caution: DO NOT INSERT ttings into the
Intake Hole farther than 1/2”; this can
DAMAGE the Pump, diminish Pump
functions, and/or STOP water ow.
Keep the Head, the height that the8.
pump discharge must push water before
discharge, to a minimum. The Vertical
Well Lift, Off-set Line Length, and Head
added together must be less than Max.
Total Head to have ow at output.
Effective ow decreases to 0 GPH as
Total Head reaches its maximum.
For your protection, the power outlet9.
used should have a Ground Fault Circuit
Interrupter (GFCI). Have it installed by
a qualied electrician. Keep power line
away from water.
The inlet and discharge lines should not10.
be wedged or stressed in a way that puts
strain on the pump. Do not support the
pump with the inlet and discharge lines.
REV 09d

Page 7For technical questions, please call 1-800-444-3353.SKU 47906
OPERATION
Compression Tank has a rubber bladder1.
inside. This bladder must be pumped
up to 26-29 PSI of air at all times. Use a
bicycle pump (not included) to inate the
bladder. On the end of the Compression
Tank opposite the side with the Pressure
Meter, is an air valve located under a
cover. Remove the cover over the air
valve and periodically monitor this air
valve with an air pressure gauge to
insure that the rubber bladder maintains
the required air pressure.
Make sure the intake pipe is fully2.
submerged before continuing.
Before starting the pump for the rst 3.
time, prime it by pouring clean water
into the Priming Inlet.
This is a self-starting pump that uses a4.
pressure switch. Once the power cord
is connected and the unit is switched on,
the pump can start at any time. Do not
handle or perform maintenance on the
pump if the power cord is plugged in.
To begin pumping, plug in the power5.
cord and turn the switch on. When the
line is pressurized, the pump will go to
standby mode until the pressure falls
below its starting pressure.

Page 8For technical questions, please call 1-800-444-3353.SKU 47906
REV 06c; 07g; 07l; 08l; 09d
MAINTENANCE
WARNING! Disconnect pump from power
source before maintenance.
Clean the inlet screen on the intake port1.
regularly to remove accumulated debris.
Wipe the pump clean with a soft, damp2.
cloth with soapy water. Do not use sol-
vents. Do not get the electrical compo-
nents wet.
Drain water from pump before storage3.
by disconnecting the water lines and
turning the Pump upside down. If storing
the pump for a long time, store it in a dry
location, and apply a light layer of oil to
the metal parts prior to storage, to inhibit
rust. Do not expose to freezing tem-
peratures.
After storage, check the Impeller to make4.
sure it turns easily and is not oxidized.
Note: Turn off the Switch and unplug the
pump when performing maintenance.
Troubleshooting
Problem Cause Solution
The pump won’t start No power.1.
Pressure switch disconnected.2.
Thermal Protection cut out.3.
Blocked impeller.4.
Check connections, and breaker/fuse.1.
Check gauge.2.
Allow pump to cool.3.
Free the impeller.4.
The pump operates
but it won’t discharge
water
Pump not primed.1.
Lift height exceeded.2.
Inlet tube not submerged.3.
Air in suction pipe.4.
Inlet screen clogged.5.
Prime pump.1.
Reduce lift height.2.
Submerge the inlet.3.
Check pipe and seals.4.
Clean screen.5.
Only a low volume of
water ows
Inlet pipe is too small.1.
Liquid is too dirty.2.
Lifting height exceeded.3.
Tank’s rubber bladder under-inated.4.
Piping corroded, causing friction.5.
Increase pipe diameter.1.
Clean screen frequently.2.
Reduce lifting height.3.
Inate to 26-29 PSI.4.
Replace piping, with plastic where5.
possible.
Motor overheats often Extension cord too long or wire size too1.
small.
Pump cycling too often.2.
Eliminate use of extension cord or use1.
shorter/heavier gauge cord.
Cut-in and cut-out pressure may be set2.
too closely; Have the pressure switch
adjusted by a qualied technician.
Pump/motor cycles
rapidly
Cut-in and cut-out pressure may be set too
closely.
Have the pressure switch adjusted by a
qualied technician.
Tank bladder will not
hold pressure
Air inlet valve is leaking.1.
Bladder is broken.2.
Check air tank for leaks using soapy1.
water and replace bladder if needed.
Replace bladder.2.
Water pumps
intermittently
Water level is being drawn below foot valve. Lower foot valve.
Follow all safety precautions whenever diagnosing or servicing the pump.
Disconnect power supply before service.
Do not disassemble the pump or motor as this will damage the water seals.
All repairs should be performed by a qualied technician.

Page 9For technical questions, please call 1-800-444-3353.SKU 47906
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED
TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR
EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY
CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT
PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Problem Cause Solution
Pump will not hold
prime
Foot/check valve not installed in suction1.
line.
Foot/check valve leaks water back to well.2.
Install foot and check valve in suction1.
line.
Replace foot/check valve.2.
Water is full of
bubbles at outlet
Pumping bubbles temporarily as air is1.
purged after initial setup.
Leak in suction side of pump system.2.
Well is gaseous.3.
Water level below suction inlet of foot4.
valve.
Temporary self-remedying issue.1.
Check for and x leaks.2.
Install a sleeve in the well.3.
Lower suction line into water and re-4.
prime. If water is deeper than 26 ft,
then a deep well pump may be needed.
Motor runs, but water
is not pumping
Improper priming.1.
Air leakage.2.
Vertical lift too high.3.
Water level below suction inlet of foot4.
valve.
Frozen pipes.5.
Foot valve in dirt or sand.6.
Foot/check valve clogged.7.
Pressure switch is set too low.8.
Prime the pump by pouring clean water1.
into the Priming Inlet.
Check all pipes and joints in the suction2.
line for air leakage using soapy water.
Reduce vertical lift to within3.
specications. See Installation
instructions.
Lower suction line into water and re-4.
prime. If water is deeper than 26 ft,
then a deep well pump may be needed.
Thaw the pipes. Bury pipes below5.
freeze line/insulate pipes.
Raise foot valve to clean water level.6.
Clean or replace foot/check valve.7.
Have the pressure switch adjusted by8.
qualied technician (20-50 psi).
Pump does not shut-
off
Pressure switch contacts welded together.1.
Faucet is open or leaking.2.
Toilet leaking.3.
Impeller is clogged.4.
Tank bladder pressure is too low.5.
Pipeline leakage.6.
Foot/check valve leaks water back to well.7.
Have the pressure switch replaced by a1.
qualied technician.
Close or repair faucet.2.
Repair leaky toilet.3.
Clean impeller.4.
Inate to 26-29 psi.5.
Repair pipeline.6.
Replace foot/check valve.7.
Follow all safety precautions whenever diagnosing or servicing the pump.
Disconnect power supply before service.
Do not disassemble the pump or motor as this will damage the water seals.
All repairs should be performed by a qualied technician.

Page 10For technical questions, please call 1-800-444-3353.SKU 47906
Part Description Qty.
1 Screw M8x12 4
2 Motor Housing 1
3 Fan Blade 1
4 Rear Cover 1
5 Spring Washer 1
6 Motor Bolt M5x125 4
7 Stator 1
8 Bearing 1
9 Rotor 1
10 Bearing 1
11 Rubber Sheath 1
12 Screw 4.2x15 2
13 Cable Block 1
14 Cable Sleeve 1
17 Waterproof Cover 1
19 Sealing 1
20 Capacitor Cover 1
21 Capacitor 1
22 Side Cover 1
24 Waterproof Switch 1
25 Screw 3.5 x 20 3
26 Hex Nut M8x20 4
27 Front Cover 1
Part Description Qty.
28 Rubber Ring 1
29 O-ring 1
30 Flange 1
31 Immobile Ring 1
33 Impeller 1
34 Flow Guide Plate 1
35 O-ring 1
36 Flow Guide Assy. 1
37 O-ring 1
38 Pump Shell 1
42 Screw M8x20 4
43 O-ring 1
45 Small Valve Cover 1
52 Retaining Ring 1
53^ PTFE Thread Seal Tape Roll 1
54^ Foot Valve 1
55^ Check Valve 1
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY
REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE
ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE
PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS
AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS
AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR
HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
PARTS LIST
^ Parts marked with a caret (^) are not shown on the diagram.