4-GALLON
BACKPACK SPRAYER
65040
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 2008 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 10f
11. do run dry. Dry running will cause
damage to the inner seals. Make
sure the water or liquid chemical sup-
ply used for the Sprayer is not dirty or
sandy.
Specific Safety Rules
1. do not point nozzle of Spray head
at yourself, other people, or ani-
mals. Do not spray liquid contents
into the wind.
12. do not pull or carry the Sprayer by
its Spray Gun Assembly. Use the
Handle (30) on the Sprayer to move
the tool from one location to another.
2. For outdoor use only.
3. do not keep water or any liquid
chemicals in Sprayer after use.
13. make sure work area has adequate
drainage to reduce the possibility
of a fall due to slippery surfaces.
4. Keep Children Away - All visitors
should be kept at a distance from
work area.
14. Prior to starting the Sprayer in cold
weather, check all of the parts of
the tool to make sure ice has not
formed. Do not store the Sprayer
where the temperature will fall below
32° Fahrenheit.
5. Do not overfill Tank (16). Do not ex-
ceed 4 gallon max. capacity of Tank.
6. this Sprayer is intended to be
used only with water, liquid fertil-
izers, liquid herbicides, and liquid
pesticides. Never attempt to spray
flammable, combustible, or corrosive
liquids with the Sprayer.
15. make sure to clean the Filter of the
Sprayer before each use.
16. Never leave the Sprayer unattend-
ed. 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..
7. do not use to spray hot liquids.
8. Always follow all chemical label
precautions and local EPA (Envi-
ronmental Protection Agency) reg-
ulations when using liquid chemi-
cals. Do not touch harmful chemi-
cals. After use, clean the Sprayer
thoroughly with agents recommended
by the chemical manufacturer.
General Safety Rules
1. When servicing, use only identical
replacement parts.
2. Use Right Appliance - Do not use
Sprayer for any job except that for
which it is intended.
9. A note on Chemicals disposal:
Never attempt to burn unused fertil-
izers, herbicides, pesticides, or any
other types of chemicals. Make sure
to check with your local solid waste
authorities for proper disposal proce-
dures.
3. Do not Force Sprayer - It will do the
job better and with less likelihood
of injury at the rate for which it was
designed.
10. Always make sure children and
animals do not have access to
chemically-treated areas.
4. Maintain Appliance With Care - Fol-
low instructions for lubricating and
changing accessories. Inspect Spray-
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 3
er periodically, and if damaged, have
it repaired by an authorized service
facility. Keep handles dry, clean, and
free from oil and grease.
SPECiFiCAtiONS
Tank Capacity
4 Gallons
44 - 58 PSI
23” - 31”
Operating PSI
Spray Range
5. Check Damaged Parts - Before
further use of the appliance, a guard
or other part that is damaged should
be carefully checked to determine
that it will operate properly and per-
form its intended function. Check for
alignment of moving parts, binding
of moving parts, breakage of parts,
mounting, and any other condition
that may affect its operation. A guard
or other part that is damaged should
be properly repaired or replaced by a
qualified technician unless indicated
elsewhere in this manual.
17 - 54 oz. (Depending
on Spray Head Type)
Flow Rate
Pump Type
Weight
Manual Hand Pump
7 lbs.
uNPACKiNG
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at the number shown on the
cover of this manual as soon as possible.
6. Do not use appliance for other than
intended use.
SEt uP iNStRuCtiONS
Read the ENtiRE imPORtANt
SAFEtY iNStRuCtiONS
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
7. Maintain labels and nameplates on
the appliance. These carry important
safety information. If unreadable or
missing, contact Harbor Freight Tools
for a replacement.
8. The warnings, precautions, and in-
structions 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.
OPERAtiNG iNStRuCtiONS
Read the ENtiRE imPORtANt
SAFEtY iNFORmAtiON section
at the beginning of this manual
including all text under
subheadings therein before set
up or use of this product.
1. Before operating any gardening ap-
pliance, put on ANSI-approved safety
goggles and other safety gear. Safe-
ty goggles and other safety gear are
sold separately.
SAVE thESE
iNStRuCtiONS.
Spray head Selection And
Assembly:
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 4
5. Prior to filling the Tank (16) of the
Sprayer with liquid, remove the Tank
Cap (23) and check to make sure the
Filter (21) is clear of dirt and debris.
If necessary, remove the Filter and
thoroughly clean.
The Sprayer is equipped with four
Spray Head (54, 55, 56, 58) types:
A. 30° Double Spray Head (54):
Designed for wider spray areas on
short crops and the spraying of
herbicides and pesticides. Move in
a parallel manner on one side while
spraying.
6. Insert the Filter back into the opening
of the Tank. Fill the Tank with up to
4 gallons of liquid. CAutiON! Do not
overfill the Tank. Replace Tank Cap.
B. Fan Style Spray Head (55):
Sprays evenly. Suitable for spray
ing herbicides on short stalked
crops. Always spray in the same
direction as the wind.
7. NOtE: The Sprayer is heavy when
completely filled with liquid. Always
get assistance when strapping the
Sprayer onto your body. If necessary,
adjust the Back Belt (43) for comfort.
8. Always make sure other adults,
children, and animals do not have
access to the area(s) in which you
intend to chemically treat.
C. Adjustable Spray Head (56):
Designed for spraying tall crops and
fruit trees and the spraying of
pesticides. However, the adjustable
spray head may result in significant
overspray of pesticides.
9. Grip Handle (30) of the Spray Gun
assembly firmly with your right hand.
d. Conical Spray Head (58):
10. With your left hand, pump Arm (11) to
build up sufficient pressure in Sprayer
system. Once the system is pressur-
ized (as indicated by an increased
tension on the Operation Arm), you
may stop pumping Arm.
May be used for spraying herbi-
cides and pesticides. Spray in the
same direction as the wind and on
one side, multi-row, cross spraying.
2. To attach a Spray Head (54, 55, 56,
58), check to make sure the Spray
Head Sealing Ring (50) is properly
seated in the Spray Head Nut (53).
11. Point the Spray Head (54, 55, 56,
58) of the Spray Gun assembly to-
ward the area to be sprayed. Then,
squeeze the Lever (41) on the Spray
Gun assembly to begin spraying.
3. Screw the desired Spray Head into
the Spray Head Nut.
12. As you spray, the system will begin
to depressurize. When distance of
spray diminishes you will need to
stop spraying momentarily. Resume
pumping Arm (11) to re-pressurize the
system before spraying again.
to Fill the Container:
4. CAutiON! Always wear eye, breath-
ing, and skin protection. Wear ANSI-
approved safety impact goggles,
an ANSI approved respirator, latex
gloves, and proper safety clothing
when using this product.
13. To refill Tank, squeeze the Lever to
completely depressurize the system.
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 5
Remove Tank Cap from Container.
Make sure Filter is clear of dirt and
debris. Refill Container with liquid,
and replace Cap. Pump Arm to pres-
surize system and continue spraying.
misalignment or binding of moving
parts, damaged or loose parts, dirt or
debris in Filter, and any other condi-
tion that may affect tool’s safe opera-
tion. do not use damaged equip-
ment.
14. To attach Extension Arm (57), make
sure the end has the rubber sealing
gasket in place. If not, use a gasket
from the spare parts bag and insert
into end of Extension Arm.
2. AFtER uSE, clean external surfaces
with clean, moist cloth.
3. CAutiON! Always depressurize
system by squeezing Lever (41)
before performing any inspection,
maintenance, or cleaning.
15. Fasten Extension Arm to Spray Head
Nut (53) until tight. Adjust Extension
Arm to desired length.
4. Periodically, lubricate all moving
16. When finished spraying, depressurize
system. Remove Cap and empty re-
maining liquid into secure container.
parts of Arm (11).
5. to clean: If using liquid chemicals,
flush the interior and clean the exte-
rior of the Sprayer and its Spray Gun
Assembly thoroughly with cleaning
agents recommended by the chemi-
cal manufacturer. Then, allow to air-
dry. do not use solvents.
17. Clean the Sprayer thoroughly with
agents recommended by the chemi-
cal manufacturer. Allow the unit to
air-dry. Replace the Cap (23), and
store the Sprayer in a clean, dry, safe
location out of reach of children.
6. When storing: Always completely
empty Sprayer of liquid. Frost will
damage Sprayer if unit contains liq-
uid. Store Sprayer in an indoor area
such as a garage or shed.
18. Note: If the Sprayer is not used for
a long period of time or continu-
ously operated over several days,
add some Vaseline (not included) to
Air Tube Sealing Washer (13). This
will help reduce wear and ease and
obstructions in the Sprayer.
CAutiON! make sure to store the
Sprayer and any chemicals in a
safe, dry, clean location out of
reach of children. Avoid storing the
sprayer in direct sunlight (which can
lead to possible UV degradation.)
mAiNtENANCE ANd
SERViCiNG
Procedures not specifically
explained in this manual
must be performed only by a
qualified technician.
7. CAutiON! All maintenance, service,
and repairs not discussed in this
manual should only be performed by
a qualified service technician.
Cleaning, maintenance, and Lubrication
1. BEFORE EACh uSE, inspect gen-
eral condition of Sprayer. Check for
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 6
PARtS LiSt
PARtS LiSt
Part
description
Q’ty
1
1
1
1
2
2
2
1
Part
description
Q’ty
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
Arm Clamp
30 Handle
Fixed Ring
Air Chamber
Bowl
Sealing Ball
O-Ring (15.5 x 2.5)
Sealing Ball Seat
Arm Cover
31 Limited Cap
32 Switch Pin
33 Switch Filter
34 Handle Sealing Ring
35 Switch Body
36 Switch Sealing Pad
37 Valve Core O-Ring
38 Valve Core
Split Pin
1
1
10 Connecting Rod
11 Arm
1
1
39 Spring
40 Switch Nut
1
1
12 Air Chamber Cover
13 Air Tube Sealing Washer
14 Air Tube
1
1
1
41 Lever
42 Shoulder Cushion
43 Back Belt
1
2
2
15 O-Ring (57 x 3.1)
16 Tank
1
1
44 Spray Spindle
45 Belt Buckle
1
2
17 Fixed Buckle
18 Fixed Pin
1
2
46 Belt Hook
47 Split Sleeve
1
2
19 Tank Base
20 Belt Clamp
21 Filter
22 Tank Pad
23 Tank Cap
2
2
2
2
48 Spindle O-Ring
49 Joint
50 Spray Head Sealing Ring
51 Divider Plate
52 Spray Plate
2
1
2
1
1
1
24 Hose Nut
25 Air Intake Plug
26 Hose
27 Spray Spindle Nut
28 Hose Cover
29 Ream Cover
1
1
1
3
1
2
53 Spray Head Nut
54 Double Spray Head
55 Fan Style Spray Head
56 Adjustable Spray Head
57 Extension Arm
58 Conical Spray Head
1
1
1
1
1
1
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.
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 7
ASSEmBLY diAGRAm
24
26
1
54
25
57
23
22
21
27
28
29
9
12
8
13
14
15
2
33
30
16
3
31 32
20
34
35
41
37
10
40 39 38 36
55
42
4
5
6
7
44
56
43
45
47
48
11
19
46
49
50
51
53
18
17
52
58
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 avail-
able individually as replacement parts.
REV 10f
SKU 65040
For technical questions, please call 1-800-444-3353.
Page 8
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