Harbor Freight Tools 47907 User Manual

SHALLOW WELL PUMP

®

3/4 Horsepower, PVC Housing

Model 47907

ASSEMBLY and OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

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 .

For technical questions and replacement parts, please call 1-800-444-3353

Specifications

Motor 120 Volt, 60 Hz, 4 Amps (start-up)

Single Phase, 3400 RPM
Discharge Size 1” Diameter
Maximum Flow 898 GPH
Maximum Suction Depth 26 Feet
Maximum Lift 140 Feet
Overall Dimensions 19” H x 10-5/8” W x 17-1/2” Long
Pressure Tank Capacity 5 Gallons
Maximum Pressure 75 PSI
Tank Hose Length 10 Inch
Weight 28-3/4 Lbs.

Save This Manual

You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not expose this pump to rain or direct immersion.
Don’t expose to rain. Keep work area well lighted. Do not use electrically powered
tools in the presence of flammable gases or liquids.

3. Keep children away. Children must never be allowed in the work area. Do not let
them handle Pump.

4. Use the right pump for the job. 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.

5. Dress properly. 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 working. Wear restrictive hair covering to contain long hair.

6. Use eye and ear protection. Always wear ANSI approved impact safety goggles and
ear protection.

7. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.

8. Maintain Pump with care. Keep Pump clean for better and safer performance.
Inspect tool cords periodically; If damaged, have them repaired by a qualified
technician.

Page 2SKU 47907 For technical questions, please call 1-800-444-3353.

9. Disconnect power. Unplug Pump when not in use.

10. Stay alert. Watch what you are doing, use common sense. Do not install Pump when
you are tired.

11. Check for damaged parts. Before using Pump, any part that appears damaged
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 fixtures; and any other condition that may affect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician.

12. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.

13. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor Freight
Tools.

14. Do not install Pump if under the influence of alcohol or drugs. Read warning
labels on prescriptions to determine if your judgment or reflexes are impaired while
taking drugs. If there is any doubt, do not install the Pump.

15. Use proper size and type extension cord. If an extension cord is required, it must be
of the proper size and type to supply the correct current to the tool without heating up.
Otherwise, the extension cord could melt and catch fire, or cause electrical damage to
the tool. This tool requires use of an extension cord of 0 to 10 amps capability (up to
50 feet), with wire size rated at 18 AWG. Longer extension cords require larger size
wire. If you are using the tool outdoors, use an extension cord rated for outdoor use
(signified by “WA” on the jacket).

16. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.

Warning: People with pacemakers should consult with their physician(s) before
using this product; operation of equipment in close proximity to a heart pacemaker
could cause interference or failure of the pacemaker.

Warning! Never operate this pump if the power cord or electrical components are
damaged or the seals are compromised. Never plug in the power cord when wet or
standing on damp or wet ground. Exercise extreme caution when working with electrical
equipment in the presence of water to maintain your personal insulation to avoid shock.
Do not allow others in the work area when working with electrical equipment. Use GFCI
outlets when using this pump.

Note: Performance of this tool (if powered by line voltage) may vary depending on variations

in local line voltage. Extension cord usage may also affect tool performance.

Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions 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.

Page 3SKU 47907 For technical questions, please call 1-800-444-3353.

Unpacking

When unpacking, check to make sure the parts listed on pages 7 and 8 are included. If any
parts are missing or broken, please call Harbor Freight Tools at the number on the cover of
this manual as soon as possible.

Installation

Note: For intake and discharge hose locations, see FIGURE 1 on page 5.
Note: If power cords must be extended, only use no less than UL approved, 18 Gauge wire.

Do not extend the wires more than 50 feet.

1. Install the pump on a rigid, level platform above the water level. This platform must provide

a solid, level surface that is capable of supporting the weight of the pump, and attached
piping filled with water. Never allow the pump to become immersed in water.

2. The level of the intake port should not be more than 12-15 feet above the water. Pumping

efficiency falls off as the height above the water level increases.

3. Keep the vertical lift that the pump must move water before discharge at a minimum. Vertical

delivery above a few feet will degrade pump efficiency.

4. The intake port must have a screen

(not included) attached to prevent
introduction of debris into the pump. At
the end of the discharge pipe, either
purchase a pre-made screen to fit, or
wrap loose screen and secure with
wire.

5. Lay out the intake and discharge pipes

with as few turns as possible to pre­vent air pockets within the lines. Air
pockets interfere with pressure switch
performance.

6. Intake and discharge pipes must have

a minimum of 1” to 1-1/4” diameter. Systems with larger vertical components should have
larger diameter piping. Keep in mind that the maximum vertical lift (total vertical distance
from the inlet screen to the discharge outlet) is 140 feet.

7. For your protection, the power outlet used should have a Ground Fault Circuit Interrupter

(GFCI). Have it installed by a qualified electrician. Keep the power line safely away from
water.

Typical Installation

Discharge

Pump

Intake

8. The inlet and discharge lines should not be wedged or stressed in a way that puts strain

on the pump. Do not support the pump with the inlet and discharge lines.

9. This is a self starting pump that uses a pressure switch. Once the power cord is connected,

the pump can start at any time. Do not handle or perform maintenance on the pump if

the power cord is plugged in.

Page 4SKU 47907 For technical questions, please call 1-800-444-3353.

Priming Valve Inlet

Intake

FIGURE 1

Discharge

Shaft

Air Valve
(not visible)

Note: Compression Tank (#1A) has a

Rubber Bladder (51) inside. This Bladder

Pressure Meter

must be pumped up with between 18 and
19 PSI of air at all times. 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 ensure that the Rubber Bladder (51)
maintains the required 18 to 19 PSI.

Operation

Warning! Never pump liquids containing abrasive materials such as sand. Never pump

flammable, corrosive, or volatile liquids.

Warning! Never plug in the power cord when wet or standing on damp or wet ground. Do not
plug in the power cord until step number 3 below.

1. Make sure the intake pipe is fully submerged before operating the pump.

2. Gently insert a screwdriver into the motor shaft and make sure the shaft turns freely.

(See Figure 1)

3. Important Note: Before starting the pump for the first time, prime it by pouring clean

water into the Priming Valve Inlet (see Figure 1). If water leaks from the drain valve

underneath the pump, securely close it and refill the unit.

4. To begin pumping, plug in the power cord.

REV 06i, REV 07g

Page 5SKU 47907 For technical questions, please call 1-800-444-3353.

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.

Troubleshooting

Problem Cause Solution

The pump won’t start No power Check connections

Blocked Impeller Free the motor shaft
Pressure switch disconnected Check gauge
Thermal Protection cut out Allow pump to cool

The pump operates but it Inlet tube not submerged Submerge the inlet
won’t discharge water Air in suction pipe Check pipe and seals

Inlet screen clogged Clean screen
Lifting height exceeded Reduce lifting height

Pump has low capacity Inlet pipe is too small Increase pipe diameter

Liquid is too dirty Clean screen frequently
Lift height exceeded Reduce lift height
Tank’s rubber bladder under- Inflate to 18-19 PSI
inflated.

Never disassemble the pump or motor as this will damage the water seals. All repairs
should be performed by a qualified technician.

Maintenance

Always disconnect pump from power source before attempting any maintenance.

1. Clean the inlet screen regularly to remove accumulated debris.

2. Use pressure gauge to test pressure in Tank’s Rubber Bladder (51). Pressure should
range between 18 and 19 PSI.

3. Wipe the pump clean with a soft, damp cloth with soapy water. Do not use solvents. Do
not get the electrical components wet.

4. 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.

5. To drain the pump, disconnect the water lines and turn it upside down.

REV 06i, REV 07g

Page 6SKU 47907 For technical questions, please call 1-800-444-3353.

Parts List

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Assembly Drawing

NOTE: Some parts are listed and

shown for illustration purposes
only and are not available indi­vidually as replacement parts.

Page 7SKU 47907 For technical questions, please call 1-800-444-3353.

ASSEMBLY DRAWING

Note: When ordering a part from this drawing, you must include the suffix “A” with

the number.

REV 08/05

Page 8SKU 47907 For technical questions, please call 1-800-444-3353.