BACKPACK SPRAYER
12 VOLT - 4.8 GAL. CAPACITY
Model 94573
SET uP And OPERATInG InSTRuCTIOnS
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE ThIS MAnuAL.
Copyright© 2006 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.
Manual Revised 10d
3. do not overreach. Keep proper footing
and balance at all times. Proper footing
and balance enables better control of the
Sprayer in unexpected situations.
SERVICE
1. Product service must be performed
only by qualified service technician.
Service or maintenance performed by
unqualified personnel could result in a
risk of injury.
4. Wear eye, breathing, and skin
protection. Wear ANSI approved safety
impact goggles, a NIOSH-approved
respirator, latex gloves, and proper
safety clothing when using this product.
2. When servicing the Sprayer, use
only identical replacement parts.
Follow instructions in the “Inspection,
Maintenance, And Cleaning” section
of this manual. Use of unauthorized
parts or failure to follow maintenance
instructions may create a risk of electric
shock or injury.
TOOL uSE And CARE
1. do not force the Sprayer. Use the
correct product for your application. The
correct product will do the job better and
safer at the rate for which it is designed.
2. Store idle tools and equipment out of
reach of children and other untrained
people. Tools and equipment are
dangerous in the hands of untrained
users.
SPECIFIC SAFETY RuLES
1. Maintain labels and nameplates on
the Sprayer. These carry important
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
3. Maintain the Sprayer with care.
Keep this product clean. A properly
maintained tool is easier to control. Do
not use damaged tools and equipment.
Tag damaged tools and equipment “Do
not use” until repaired.
2. use the right product for the job.
There are certain applications for which
this product was designed. Do not use
small tools, equipment, or attachments
to do the work of larger industrial tools,
equipment, or attachments. Do not use
this product for a purpose for which it
was not intended.
4. Check for misalignment or binding
of moving parts, loose or broken
parts, and any other condition that
may affect the Sprayer’s operation.
If damaged, have the Sprayer serviced
before using. Many accidents are
caused by poorly maintained tools and
equipment.
3. Industrial applications must follow
OShA requirements.
4. Store idle tools. When not in use, store
the Sprayer in a clean, dry, safe location
out of reach of children.
5. use only accessories that are
recommended by the manufacturer
for your model. Accessories that may
be suitable for one product may become
hazardous when used on another
product.
5. This Sprayer is intended to be used
only with water, liquid fertilizers,
liquid herbicides, and liquid
pesticides. never attempt to spray
flammable, combustible, or corrosive
liquids with the Sprayer.
SKU 94573
For technical questions, please call 1-800-444-3353.
Page 3
6. Always follow all chemical label
precautions and local EPA regulations
when using liquid chemicals. Do
not touch harmful chemicals. After
use, clean the Sprayer thoroughly with
agents recommended by the chemical
manufacturer.
the tool to make sure ice has not
formed. Do not store the Sprayer
where the temperature will fall below 32°
Fahrenheit.
16. do not keep water or any liquid
chemicals in the Sprayer after use.
17. Make sure to clean the Filter of the
Sprayer before each use.
7. never point the nozzle of the Spray
Gun Assembly at yourself, other
people, pets and animals, or property.
18. never leave the Sprayer unattended.
When finished using the Sprayer, empty
the unit. Thoroughly clean the unit and
store it in a clean, dry, safe location out
of reach of children.
8. A note on Chemicals disposal: Never
attempt to burn unused fertilizers,
herbicides, pesticides, or any other types
of chemicals. Make sure to check with
your local solid waste authorities for
proper disposal procedures.
19. The warnings and cautions discussed
in this 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.
9. Always make sure children and
animals do not have access to
chemically treated areas.
10. dry running will cause damage to
the inner seals. Make sure the water
or liquid chemical supply used for the
Sprayer is not dirty or sandy.
20. People with pacemakers should consult
their physician(s) before using this
product. Electromagnetic fields in close
proximity to a heart pacemaker could
cause interference to or failure of the
pacemaker.
11. do not pull or carry the Sprayer by its
Spray Gun Assembly. Use the Handle
on the Sprayer to move the tool from one
location to another.
SAVE ThESE InSTRuCTIOnS
12. The work area should have adequate
drainage to reduce the possibility of a
fall due to slippery surfaces.
GROundInG
TO PREVEnT
ELECTRIC ShOCK
And dEATh FROM InCORRECT
GROundInG WIRE
COnnECTIOn:
Check with a qualified electrician
if you are in doubt as to whether
the outlet is properly grounded.
do not modify the power cord
plug provided with the tool.
never remove the grounding
prong from the plug. do not use
13. This product is designed for outdoor
use only.
14. Keep the Cap and Spray Gun
Assembly of the Sprayer connected
to the tool while the system is
pressurized. Prior to refilling or
emptying the Tank, squeeze the
Trigger on the Spray Gun Assembly to
completely depressurize the system.
15. Prior to starting the Sprayer in cold
weather, check all of the parts of
Page 4
For technical questions, please call 1-800-444-3353.
SKU 94573
the tool if the power cord or plug
is damaged. If damaged, have it
repaired by a service facility
before use. If the plug will not fit
the outlet, have a proper outlet
installed by a qualified
Symbology
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
Amperes
electrician.
double Insulated Tools: Tools with
Two Prong Plugs
V~
A
No Load Revolutions per Minute
(RPM)
n xxxx/min.
0
Outlets for 2-Prong Plug
1. Tools marked “Double Insulated” do
not require grounding. They have a
special double insulation system which
satisfies OSHA requirements and
complies with the applicable standards
of Underwriters Laboratories, Inc., the
Canadian Standard Association, and the
National Electrical Code. (See Outlets
for 2-Prong Plug.)
2. Double insulated tools may be used in
either of the 120 volt outlets shown in the
preceding illustration. (See Outlets for
2-Prong Plug.)
Extension Cords
note: Extension cords must not be used with
this item’s charger.
SKU 94573
For technical questions, please call 1-800-444-3353.
Page 5
SPECIFICATIOnS
FIGuRE E
ChARGER
Charger Input
120 V~ / 60 Hz
12 VDC
(63)
Charger Output
Battery Type
Charge Time
Rechargeable 12V / 10 Ah
8 Hours
Charger Cord/Plug 58-1/2” L, 2-Prong
Spray Time Output Approximately 9 to 10 Hours
(Full Charge)
ChARGInG
PLuG
POWER
SWITCh
(58)
Tank Capacity
Flow Rating
Maximum
4.8 Gallons
0.7 Gallons Per Minute
65 PSI
ChARGE FOR 8 hOuRS
(dO nOT OVERChARGE)
Pressure
Unit Dimensions
Spray Rod
Dimensions
Unit Weight
(Empty)
7” Long x 15” Wide x 23-5/8” High
28” Long x 3/8” Diameter
2. To charge the Battery (51), Turn the
Power Switch (58) to its “OFF” position.
(See Figure E.)
17.5 lb.
3. Insert the chrome Charging Plug of
the Charger (63) into the Charging
Accessories
Conical Mist Nozzle
Four Hole Adjustable Nozzle
Mist Nozzle / 30° Dual Nozzle
Diaphragm Pump
Receptacle of the Sprayer. Make sure
to screw the chrome Charging Plug onto
the Receptacle firmly. (See Figure E.)
Additional
Features
Triple Screen Water Filtration
4. Plug the Power Cord Plug of the Charger
(63) into the nearest, 120 volt, grounded,
electrical outlet. (See Figure E.)
unPACKInG
When unpacking, make sure all that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon as
possible.
5. Charge the Battery (51) for 8 hours.
IMPORTAnT: The Charger (63) will not
automatically shut off when the Battery
(51) is fully charged. Avoid Battery/
tool damage by removing power to the
Charger at the end of 8 hours charge
time. (See Figure E.)
ChARGInG InSTRuCTIOnS
1. The Battery (51) for the Sprayer must
be fully charged before using the tool.
When charging for the first time, and all
subsequent charges, the charge time is
8 hours. Never charge the Battery (51)
for longer than 8 hours, as damage to
the Battery and/or Sprayer will occur.
6. Keep children and pets away from the
Battery while it is charging. Regularly
check the Battery to make sure it is
charging properly.
7. When finished charging, disconnect the
Charger (63) from the electrical outlet.
Then, unscrew and remove the chrome
Charging Plug of the Charger (63) from
the Charging Receptacle of the Sprayer.
(See Figure E.)
8. On a full charge, the Sprayer will operate
approximately 9 to 10 hours.
REV 06j
Page 6
For technical questions, please call 1-800-444-3353.
SKU 94573
ASSEMBLY And OPERATInG
InSTRuCTIOnS
FOuR hOLE
AdJuSTABLE
nOZZLE (62)
CAuTIOn! Wear eye, breathing, and skin
protection. Wear ANSI-approved safety
impact goggles, a NIOSH-approved
respirator, latex gloves, and proper
FIGuRE h
c. Four hole Adjustable nozzle (62):
Designed for spraying high crops
and fruit trees and the spraying of
pesticides. However, the Adjustable
Nozzle may result in significant
overspray of pesticides.
safety clothing when using this product.
nozzle Selection And Assembly:
1. The Sprayer is equipped with the
following Nozzle types:
(See Figure h.)
COnICAL MIST
nOZZLE (65)
30° duAL nOZZLE
(60)
FIGuRE I
FIGuRE F
d. Conical Mist nozzle (65): Designed
for spraying low crops and the spraying
of herbicides and pesticides. Allows for
a conical spray pattern. Follow the wind
and move in a parallel manner on one
side while spraying. (See Figure I.)
a. 30° dual nozzle (60): Designed
for wider spray areas on short crops
and the spraying of herbicides and
pesticides. Follow the wind and move
in a parallel manner on one side while
spraying. (See Figure F.)
nOZZLE
nOZZLE
nuT (1)
(60, 61, 62, 65)
MIST
nOZZLE
(61)
nOZZLE GASKET
RInG (4)
SPRAY Gun ASSY.
FIGuRE J
2. To attach a Nozzle (60, 61, 62, 65) to
the Spray Gun, check to make sure
the Nozzle Gasket Ring (4) is properly
seated in the Nozzle Nut (1). Then,
screw the desired Nozzle into the Nozzle
Nut. (See Figure J.)
FIGuRE G
b. Mist nozzle (61): Designed for narrow
spray areas on low crops and the
spraying of herbicides and pesticides.
Follow the wind and move in a parallel
manner on one side while spraying.
(See Figure G.)
SKU 94573
For technical questions, please call 1-800-444-3353.
Page 7
be sprayed. Then, squeeze the Trigger
to begin spraying. (See Figure L.)
To Fill The Tank:
TAnK
CAP (41)
nOTE: The Trigger (17) of the Spray Gun
Assembly may be locked in a continuous
run position with the Trigger Lock
TAnK
FILTER (42)
(16). To do so, move the Trigger Lock
backward toward the Handle (21). To
return to manual operation, move the
Trigger Lock forward toward the Spray
Rod (9). (See Figure L.)
TAnK
(64)
FIGuRE K
1. Prior to filling the Tank (64) of the
Sprayer with liquid, remove the Tank
Cap (41) and check to make sure the
Tank Filter (42) is clear of dirt and debris.
If necessary, remove the Filter and
thoroughly clean. (See Figure K.)
3. As you spray, the system will begin to
depressurize. When the distance of the
spray diminishes you will need to stop
spraying momentarily. Allow the Sprayer
to re-pressurize its system before
spraying again.
4. If it becomes necessary to refill the
Tank (64) of the Sprayer, turn the Power
Switch (58) to its “OFF” position.
2. Next, insert the Tank Filter back into the
opening of the Tank.
3. Fill the Tank with up to 4.8 gallons of
liquid. Then, replace the Tank Cap on
the Tank.
Continue squeezing the Trigger (17) on
the Spray Gun Assembly to completely
de-pressurize the system. Remove the
Tank Cap (41) from the Tank. Check to
make sure the Tank Filter (42) is clear
of dirt and debris. Refill the Tank with
liquid, and replace the Tank Cap. Turn
the Power Switch to its “On” position
to pressurize the system, and continue
spraying. (See Figures E and K.)
To Operate The Sprayer:
CAuTIOn! Make sure other adults, children,
and animals do not have access to the
spray area(s).
nOTE: The Sprayer is heavy when
completely filled with liquid. Strap the
Sprayer on with assistance. Adjust the
Back Strap (45) as needed.
5. When finished spraying, turn the Power
Switch (58) to its “OFF” position.
Continue squeezing the Trigger (17) on
the Spray Gun Assembly to completely
depressurize the system. Remove the
Tank Cap (41) from the Tank (64), and
empty any remaining liquid into a safe
and secure container. Clean the Sprayer
thoroughly with agents recommended
by the chemical manufacturer. Allow the
unit to air-dry. Replace the Tank Cap
(41), and store the Sprayer in a clean,
dry, safe location out of reach of children
and other unauthorized people.
TRIGGER
(17)
TRIGGER
LOCK (16)
SPRAY
hAndLE
ROd (9)
(21)
FIGuRE L
1. Grip the Handle (21) of the Spray Gun
Assembly firmly. Then, turn the Power
Switch (58) to its “On” position.
(See Figures E and L.)
2. Point the Nozzle (60, 61, 62) of the
Spray Gun Assembly toward the area to
Page 8
For technical questions, please call 1-800-444-3353.
SKU 94573
2. To clean: If using liquid chemicals,
flush the interior and clean the exterior
of the Sprayer and its Spray Gun
Assembly thoroughly with cleaning
agents recommended by the chemical
manufacturer. Then, allow to air-dry. Do
not use solvents.
InSPECTIOn, MAInTEnAnCE,
And CLEAnInG
CAuTIOn! Make sure the Power Switch
(58) is in its “OFF” position and
unplugged from its Charger (63).
Then, de-pressurize the system
before performing any inspection,
maintenance, or cleaning of the
Sprayer.
3. When storing: Always completely
empty the Sprayer of liquid. Frost will
damage the Sprayer if the unit contains
liquid. Store the Sprayer in an indoor
area such as a garage or shed. Make
sure to store the Sprayer and any
chemicals in a safe, dry, clean
1. Before each use, inspect the general
condition of the Sprayer. Check for
misalignment or binding of moving parts,
damaged or loose parts, dirt or debris in
the Filter and Nozzle, damaged electrical
wiring, and any other condition that
location out of reach of children and
other unauthorized people.
may affect the tool’s safe operation. If
abnormal noise or vibration occurs, have
the problem corrected before further use.
do not use damaged equipment.
4. CAuTIOn! All maintenance, service,
and repairs not discussed in this manual
should only be performed by a qualified
service technician.
TROuBLEShOOTInG
Problem
Unit does not spray.
Possible Solution
1. Fully charge the battery.
2. Fill the tank.
3. Firmly tighten the Tank Cap and secure all connections on the tank and
the spray gun assembly.
4. Clear the Nozzle on the Spray Gun assembly of dirt and debris.
1. Use the proper Nozzle for the job at hand.
The spray pattern is
undesirable.
2. Clear the Nozzle on the Spray Gun assembly of dirt and debris.
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 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 RISKS 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.
SKU 94573
For technical questions, please call 1-800-444-3353.
Page 9
PARTS LIST
Part
1
2
3
4
5
6
7
8
description
Qty.
1
1
1
1
1
2
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
4
4
4
1
1
1
1
1
Part
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
description
Qty.
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
1
1
1
1
2
7
3
2
2
1
1
1
1
1
1
1
1
Nozzle Nut
Mini-Pump
Conical Mist Spraying Sheet
Splitting Sheet
Nozzle Gasket Ring
Elbow
Spray Rod O-Ring
Opening Cover
Spray Rod Nut
Spray Rod
Switch Main Unit
Switch Gasket
Valve Cartridge O-Ring
Valve Cartridge
Spring
Tube Coupling
O-Ring
Inlet Coupling
Screen Frame
Screen Cover
Vent Valve
Tank Cap
Tank Filter
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Barrel
Strap Clamp
Back Strap
Shoulder Cushion
Strap Button
Strap Hook
Switch Nut
Trigger Lock
Self Tapping Screw (3.7 x 10)
Alarm
Trigger
Switch Pin
Battery
Handle Gasket Ring
Switch Filter Screen
Handle
Opening Cover
Tube Sleeve
Anchor Ear
Self Tapping Screw (3.7 x 18)
Power Cable
Nylon Tier
Countersink Screw (M3 x 10)
Nut (M3)
Power Switch
Socket
Dual Nozzle
Mist Nozzle
Hose
Caster
Screw (M5 x 20)
Flat Washer (#5)
Nut (M5)
Protection Cover
Base
Countersink Screw (M5 x 15)
Tube Clamp
Inlet Tube
Adjustable Nozzle
Charger
Tank
Conical Mist Nozzle
Page 10
For technical questions, please call 1-800-444-3353.
SKU 94573
ASSEMBLY dIAGRAM
40
41
1
2
3
60
42
43
4
5
6
44
7
8
45
61
9
64
65
14
12
11
62
63
15
16
17
39
38
10
13
46
47
18
19
37
51
36
35
20
21
49
48
53
52
34
50
59
22
23
32
33
55
54
57, 56
58
30
31
29
24
25
28, 27, 26
nOTE: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
Rev 10d
SKU 94573
For technical questions, please call 1-800-444-3353.
Page 11
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