Brinly ST-251BH User manual

1L-1914-F
Call Customer Service, Toll-Free: 877-728-8224
Important: This manual contains information for the safety
of persons and property. Read it carefully before
assembly and operation of the equipment!
Visit us on the web!
www.brinly.com
OWNER'S MANUAL
• Assembly
• Installation
• Operation
• Repair Parts
25 GALLON TOW-BEHIND SPRAYER
MODEL:
ST-251BH
This sprayer is
designed for use with
lawn tractors and lawn
and garden tractors.
English Manual

2L-1914-F
==================================================================================================
INTRODUCTION AND SAFETY
CUSTOMER RESPONSIBILITIES
- Please read & retain this manual. The instructions will enable to assemble and maintain your product properly.
- Please carefully read and observe the SAFETY SECTION of this manual.
- Follow a regular schedule in maintaining and caring for your Brinly-Hardy product.
CONGRATULATIONS on your new Brinly-Hardy Lawn Sprayer! This accessory has been designed, engineered and
manufactured to give you the best possible dependability and performance.
Should you experience any problem you cannot easily remedy, please do not hesitate to contact our knowledgeable customer
service department toll-free at 1-877-728-8224. We have competent, well trained technicians to help you with the assembly
and use of your sprayer.
English Manual
TABLE OF CONTENTS
SAFETY ......................... 2 - 3
PARTS .......................... 5 - 8
ASSEMBLY ..................... 9 - 17
OPERATION ................... 18 - 21
MAINTENANCE .....................22
SERVICE / SPECIFICATIONS ........ 22
WARRANTY ....................... 24
SAFETY
==========================================
RULES FOR SAFE OPERATION
• Know controls and how to stop safely, READ THE OWNER’S
MANUAL before operating.
• Do not allow children to operate the vehicle, do not allow
adults to operate without proper instruction or without having
read the owner’s manual.
• Do not carry passengers. Keep children and pets a safe
distance away.
RECORD PURCHASE INFORMATION
==========================================
Record your purchase information in
the spaces provided below:
Date of Purchase _________________________________
Company Name _________________________________
Company Phone _________________________________
Serial Number _________________________________
This symbol will help to point out the important
safety precautions throughout this manual.
It means - ATTENTION! BECOME ALERT!
Your safety is involved.

3L-1914-F
==================================================================================================
• Ensure the combined weight of the towing vehicle (tow
vehicle weight + operator weight) is greater than the
maximum towed weight of attachment (empty attachment
weight + weight of load).
• Do not exceed maximum towing capacity of towing vehicle.
• Do not exceed the maximum drawbar pull rating of the
towing vehicle. Drawbar pull is the horizontal force required
to pull the attachment (including weight of load).
• Only tow this product in the vehicle’s tow mode/speed setting
or less than 5 mph. Do not exceed 5 mph.
• Towing speed should always be slow enough to maintain
control. Travel slowly and use caution when traveling over
rough terrain. Avoid holes, rocks and roots.
• Slow down before you turn and do not turn sharply.
• Use wide turning angles to ensure the attachment follows
the path of the towing vehicle.
• Do not use attachment on steep slopes. A heavy load
could cause loss of control or overturn attachment and
towing vehicle. Additional weights may need to be added
to your vehicle; check with towing vehicle manufacturer for
recommendations.
• Reduce towed weight when operating on slopes.
• Keep all movement on slopes slow and gradual. Do not
make sudden changes in speed, directions, or turning.
GENERAL NOTES (OPERATION)
Caution should be taken when towing and/or using any attachment. This attachment combined with the weight distribution, turning
radius, and speed of towing vehicle can result in severe injury or death to operator, damage to towing vehicle, and/or attachment
if not used properly. Follow all towing safety precautions noted in the towing vehicle owner’s manual, including the following
precautions:
• If you start and stop suddenly on hills, you may lose steering
control or the towing vehicle may tip. Do not start or stop
suddenly when going uphill or downhill. Avoid uphill starts.
• Slow down and use extra care on hillsides. Turf conditions
can affect vehicle stability. Use extreme caution while
operating near drop-offs.
• Do not drive close to creeks, ditches and public highways.
• Watch out for trafc when crossing near roadways.
• Use care when loading or unloading the vehicle into a trailer
or truck.
• The attachment can obstruct the view to the rear. Use extra
care when operating in reverse.
• When reversing, carefully back-up straight to avoid
jackkning. Do not allow towing vehicle wheels to contact
attachment draw bar. Damage could result.
• Stop on level ground, disengage drives, set the parking
brake, and shut off engine before leaving the operator’s
position for any reason including emptying the attachment.
• Use this attachment for intended purpose only.
• This attachment is intended for use in lawn care and home
applications. Do not tow behind a vehicle on a highway or
in any high speed applications. Do not tow at speeds higher
than the maximum recommend towing speed.
...continued on page 4
SAFETY
English Manual
The safety labels shown in this section are placed in important areas on your product to draw attention to potential safety hazards. On
your product safety labels, the words DANGER, WARNING and CAUTION are used with the safety-alert symbol. DANGER identies
the most serious hazards. The operator’s manual also explains any potential safety hazards whenever necessary in special safety
messages that are identied with the word, CAUTION, and the safety-alert symbol.

4L-1914-F
==================================================================================================
• Do not tow this product behind a motor vehicle such as a car
or truck.
• Always wear substantial footwear. Do not wear loose tting
clothing that can get caught in moving parts.
• Keep your eyes and mind on your towing vehicle, attachment
and area being covered. Do not let other interests distract
you.
• Stay alert for holes and other hidden hazards in the terrain.
• Keep the towing vehicle and attachment in good operating
condition and keep safety devices in place.
• The towing vehicle and attachment should be stopped and
inspected for damage after striking a foreign object. Any
damage should be repaired before restarting and operating
the equipment.
• Keep all parts in good condition and properly installed. Fix
damaged parts immediately. Replace worn or broken parts.
Replace all worn or damaged safety and instruction decals.
Keep all nuts, bolts and screws tight.
• Do not modify the attachment or safety devices. Unauthor-
ized modication to the towing vehicle or attachment may
impair its function, safety and void the warranty.
TOWING VEHICLE
AND TOWING SAFELY
• Know your towing vehicle controls and how to stop safely.
READ YOUR TOWING VEHICLE OWNER’S MANUAL
before operating.
• Check the towing vehicle brake action before you operate.
Adjust or service brakes as necessary.
• Stopping distance increases with speed and weight of towed
load. Travel slowly and allow extra time and distance to stop.
• Use only approved hitches. Tow this attachment only with a
towing vehicle that has a hitch designed for towing. Do not
connect this attachment except at the approved hitch point.
• Follow the tow vehicle manufacture’s recommendations for
weight limits for towed equipment and towing on slopes. Use
counterweights or wheel weights as described in the towing
vehicle operator’s manual.
• Do not shift to neutral and coast downhill.
• Do not allow children to operate the towing vehicle. Do not
allow adults to operate the towing vehicle without proper
instruction or without having read the owner’s manual.
PROTECT THOSE AROUND YOU
• Before you operate any feature of this attachment or
towing vehicle, observe your surroundings and look for
bystanders.
• Keep children, bystanders and pets at a safe distance
away while operating this or any attachment.
• Use care when reversing. Before you back up, look carefully
behind for bystanders.
KEEP RIDERS OFF TOWED ATTACHMENT
AND THE TOWING VEHICLE
• Do not carry passengers.
• Do not let anyone, especially children, ride in/on this
attachment, the towing vehicle or hitch bracket. Riders are
subject to injury such as being struck by foreign object and/
or being thrown off during sudden starts, stops and turns.
Riders may also obstruct the operator’s view resulting in this
attachment being operated in an unsafe manner.
SPRAYER-SPECIFIC
SAFETY INFORMATION
• Caution should always be exercised when working on or
near batteries.
• Heavy gloves and eye protection should be worn when
making connections to the battery.
GENERAL NOTES (OPERATION), continued
SAFETY
Tools Required for
Assembly:
• 1/2” Wrench (2)
• #2 Phillips Screw Driver
• Pliers
• Tape Measure
• Eye Protection
• Gloves

5L-1914-F
==================================================================================================
PARTS
Ref # Part # Description Qty
41 B-6322F-10 Towbar; Front, Painted 1
42 B-5684-01 Axle; Plated 1
45 B-5692 Wheel Asm; Pneu 2
47 B-3034-10 Clevis, Blk. 1
50 1018962 Wire Harness Batt Conn 1
51 1018961 Wiring Harness w switch 1
Ref # Part # Description Qty
52 1008563 Decal, BH Logo 1
53 B-6020 Decal, Caution 1
54 L-1744 Label, Serial No 1
55 L-1823-1 Label, Inspected by 2
56 R-1946 Decal, Instruction w/ CE 1
39 40
38
39 40
37
42
43
46
44
44
45
46
47
43
44
44
48
45
49
32 41
34
34
50
32
51
50
STOP
INSTALLATION
QUESTIONS? MISSING
PARTS? REPLACEMENT
PARTS?
Please call our Customer
Service Department, Toll Free:
[phone] or email:
[e-mail]
DON’T GO
BACK TO THE
STORE!

6L-1914-F
==================================================================================================
PARTS
English Manual
1
18
15
15
14
16
Ref #s on
page 7
17 15
15 15
15
15 15
12
8
7
9
12
17
13
3
34
34
4
5
30
28
27
29
30
28
29
27
31
31
33
32
32
33
34
34
33
33
6
32
32
2
ST-251BH

7L-1914-F
==================================================================================================
PARTS
English Manual
Ref # Part # Description Qty
1B-6025 Tank; Sprayer, 25Gal 1
2B-6028 Cap; Tank 1
3B-6578 Cap; Drain, 3/4” 1
4B-6054 Washer; Black Vinyl 1” OD x 3/4“ ID 3
5S-1142 Boom, support 2
6B-6322R-10 Base; Rear, Painted 1
7B-7761L-10 Bar; Boom, Painted 1
8B-7761R-10 Bar; Boom, Painted 1
9S-1141-10 Boom Center, Painted 1
10 1016888 Hose, 3/8" x 8" 1
11 B-6087 Hose, 3/8" x 17" 1
12 B-6035 Hose, 3/8" x 22" 2
13 B-6034 Hose, 3/8" x 38" 1
14 B-6033 Hose, 3/8” x 12' 1
15 B-6047 Clamp, Hose 4
16 B-6400 Hand Wand 1
19 B-6046 Elbow 1
20 B-6027 Pump; 2.0 GPM, CE Rated 1
Ref # Part # Description Qty
21 B-6598 Adaptor, 1/8 MPT x 3/8" H.B. 1
23 1016549 Male Fitting 1
24 B-6512 Tee, Dual Valve 1
33 R-618 Washer, Special 4
34 B-5695 Bolt,Hex Fl.Hd, 5/16 4
35 45M0909P Washer; SAE Flat, 1/4" 4
36 22M0616P Screw; Round Head, #10 4
Closer View of the Pump and T-Valve Assembly
+ the surrounding parts) from pg 6
ST-251BH
11
10
19
15
15
21
22
20
36
36
x4
35
25
25
26
26
23
15
15
19
24
4
STOP
Installation Questions? Missing Parts?
Replacement Parts? DON’T GO BACK
TO THE STORE!
Please call our Customer Service
Department, Toll Free: 877-728-8224 or
email: [e-mail]
Continue to page 8 for
contents of the hardware bags.

8L-1914-F
==================================================================================================
PARTS
31 F-782 Knob, 4 Prong, Black 2
32 B-4355 Nut, Whiz Lock, 5/16" -18 12
34 B-5695 Bolt, Hex Fl. Hd, 5/16 6
37 22M0616P Screw, Round Head, #10 1
38 1019182 Screw #10 x 1 Self Tap 1
39 B-6511 Clip, wand holder 2
40 1019177 Nylon spacer, #10 x 5/8 lg 2
43 F-577 E Ring, 5/8" 2
44 45M2121P Washer, Flat 5/8 4
46 B-5691 Spacer, Axle 2
48 B-3861 Pin, Hitch 1/2" X 2-1/2" 1
49 D-146P Cotter, Hairpin 1/8",#211 1
Hardware Bag “A”Z-1705
3B-6054 Washer, Vinyl, 3/4" 2
15 B-6047 Clamp, Hose 8
17 B-6043 Nozzle Body, 90 Deg 2
18 B-6045 Hose Barb; Tee, 3/8” x 3/8” 1
22 B-6597 Strainer; 1/4" NPT 1
25 B-6055 Hose Barb 2
26 B-6056 Nut, Hose Swivel 2
Hardware Bag “B”Z-1987
27 B-6041 Nut; Jam, Plastic 2
28 B-6040 Strainer; Nozzle 2
29 S-1148 Tip; 90 deg 2
30 B-6042 Nut; TipFitting 2
Tip Bag; (2) 90 Deg.Z-1704-CC2
ST-251BH
NOTES

9L-1914-F
==================================================================================================
Step 1
Step 2-1
INSTALL CLEVIS
ATTACH THE WAND HOLDER CLIPS
ASSEMBLY
A. Retirez le bouchon du réservoir (2).
B. Add the rst wand clip using:
- (40) Nylon Spacer (x1)
- (39) Wand Clip (x1)
- (37) Screw, Round Head (x1)
C. Add the second wand clip using:
- (40) Nylon Spacer (x1)
- (39) Wand Clip (x1)
- (38) Screw, #10 Tapping (x1)
49 - Hairpin Cotter
Qty. 1
48 - Hitch Pin
Qty. 1
50 - Hex Flange
Bolt, 5/16” x 5/8”
Qty. 2
32 - Whiz
Lock Nut, 5/16”
Qty. 2
48
47
49
32
50 41
A. Install Clevis (47) to
the Tow-bar (41).
B. Install Hitch Pin (48)
and secure with
Hairpin Cotter. (49).
38
39
40
39
40
37
B
C
2

10 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
Step 2-2
D. Inside the tank (1), on the end of
the suction hose (11):
Attach the mesh strainer (22) by
screwing it to the 1/4 inch adapter (21).
NOTE:
The suction hose (11)
is already attached to
the pump.
Step 3
With pliers, clamp one end of the 3/8“ x 12’
hose (14) to the Hand Wand (16) using one
Hose Clamp (15), as shown.
22 21
11
15 - Hose Clamp
Qty. 1
NOTE:
IT CAN BE TRICKY TO
INSERT THE HOSE
BARBS
Try dipping the
ends of your
hoses in soapy
water. 16
14
15

11 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
Step 4
HOSE SWIVEL NUTS
A. Insert a Hose Barb (25)
through the threaded side of
each Hose Swivel Nut (26),
as shown.
B. Insert one Vinyl
Washer (4) against the
back side of the Hose
Barb (26) to insure that
the ttings do not leak.
4
25
26
4
25
26
24
26
25
4
C. Screw the assembled Swivel Nuts (26) to both Dual
Tee Valve ttings (24), as illustrated here.
A. Attach the Wand Hose (14)
to the Hose Barb (25) previously
installed to the Dual Tee Valve (24)
as shown.
B. Clamp the hose in place
using pliers to secure the
Hose Clamp (15) over the
Hose barb.
Step 5-1
15
25
14
24
15 - Hose Clamp
Qty. 1

12 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
C. Stow the wand
and hose by wrapping
it around the top of the
sprayer tank, then
secure the wand to the
wand holder clips.
Step 5-2
ATTACH BOOM HOSE
TO THE PUMP
A. Attach the 38 inch
Hose (13) to the
remaining Hose Barb
(25) installed to the Dual
Tee Valve (24) as shown.
Step 6
15 - Hose Clamp
Qty. 1
B. Clamp the hose in place
using pliers to secure the
Hose Clamp (15) over the
Hose barb (25).
24
25
15
13

13 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
Step 7
Step 8
INSTALL
THE TOWBAR
Install the Towbar (41)
to the Rear Base (6) as
shown.
A. Install Axle (42) in to
Rear Base (41).
B. Install Axle Spacer (46) to one
side of the Axle (42) followed by:
- x1 Flat Washer (44)
- x1 Wheel (45)
- x1 Flat Washer (44)
Note: Make
sure valve stem is
outboard to maintain
proper tire ination.
C. Attach E-Ring
(43) to secure
wheel to the
axle.
D. Repeat steps for other wheel.
34 - Bolt; Hex Flange
5/16” x 5/8” | Qty. 4
32 - Nut; Whiz Lock
5/16” | Qty. 4 32
41
6
32
32
32
34
34
43
46
44
44
45
42
41
44
Washer,
Flat 5/8”
Qty. 4
46
Axle
Spacer
Qty. 2
43
E-Ring
5/8”
Qty. 2

14 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
INSTALL BOOM SUPPORTS
Install the Boom Supports (5) to
the left and right side of the Rear Base
Assembly (6) using 2 Lock Nuts (32),
as shown.
Note: Thread lock nut
close to the end of the
boom support.
Step 9
32 - Nut; Whiz Lock
5/16” | Qty. 4
Note: Thread the
nut close to end of
boom support (38)
5
5
5
6
32
INSTALL BOOM CENTER BAR
AND BOOM EXTENSIONS
A. Install a Lock Nut (32) on both
Boom Supports (5) with the ange
facing upward as shown.
B. Position Boom Center Bar (39) over
both Boom Supports (5).
C. Mount RH and LH Boom Extensions
(7 & 8) to Boom Supports and tighten
snugly using Knob (31).
Step 10
32 - Nut; Whiz Lock
5/16” | Qty. 2
Note: Once assembled completely and hooked to towing machine, measure from each Boom Extension to the ground
and adjust threaded nut until you get a distance of approximately 16.5 inches before spraying.
5
5
32
32
7
8
9
31
31
32

15 L-1914-F
==================================================================================================
ASSEMBLY
English Manual
CONNECT PUMP SUPPLY
HOSE TO BOOM
A. Place a Hose Clamp (15) on the end of
the 38 inch hose (13) and t the center orice
of the Hose Barb (18) into the end of the hose
as shown.
B. Tighten the hose
clamp (15) with a pair
of pliers.
OPTIONAL / ALTERNATE ASSEMBLY:
PUMP SUPPLY HOSE - through the center boom...
A. Route the free end of the pump supply hose (13) through the hole
in the Boom Center Bar (9), as shown.
B. Place the Hose Clamp (15) on the end of the 38 inch hose (13) and
t the center orice of the Hose Barb (18) into the end of the hose
as shown.
C. Tighten the hose clamp (15) with a pair of pliers.
Step 11
15 - Hose Clamp
Qty. 1
13
13
15
18
18
9

16 L-1914-F
==================================================================================================
ASSEMBLY
A. Assemble the sprayer tips / nozzles with
hardware found in the tip bag to the right Boom
Extension (7), as shown.
Hold the tip of the nozzles (29) pointing down
to the ground while securing the nut (30).
Note: DO NOT over tighten plastic ttings.
B. Repeat for left Boom Extension (8).
Step 12
30 - Nut; Tip
Fitting | Qty. 2
29
Tip; 90 Deg.
Qty. 2
28
Nozzle Strainer
Qty. 2
27 - Nut; Jam
Plastic | Qty. 2
17 - Nozzle Body,
90 Deg. | Qty. 2
27
28
29
30
17
7
NOTE: The Sprayer Tip (25) and Nozzle Strainer (26) are easily lost when the Nut Tip Fitting is removed. Use caution.
CONNECT SPRAYER HOSES
A. Place a Hose Clamp (15) on the
end of a 22 inch hose (12). Slide
the end of the hose over the
nozzle body (17) as shown.
B. Tighten the hose
clamp (15) with a
pair of pliers.
Step 13-1
15 - Hose Clamp
Qty. 1
17 15
12
C. Repeat this step, attatching the second 22 inch hose (12)
to the second nozzle body (17).
English Manual

17 L-1914-F
==================================================================================================
ASSEMBLY
CONNECT SPRAYER HOSES
A. Connect the Sprayer Hose (12) for both
left and right sprayer nozzles to the Hose
Barb (18), as shown.
B. Tighten the hose
clamp (15) with a
pair of pliers.
Step 13-2
SETTING BOOM HEIGHT
Once hooked to the towing machine,
measure the distance between the boom
extensions and the ground. Adjust threaded
nut until you get the a distance of
approximately 16.5 inches.
See Step 10.
Step 14
15
18
12
12
15
15 - Hose Clamp
Qty. 2
2
C. Place the sprayer cap (2) back
on the tank.
16.5”
English Manual

18 L-1914-F
==================================================================================================
English Manual
OPERATION
The following maximum loaded weight capacity is the
average weight loaded with water to the 25 gallon mark on
the sprayer tank.
Model Sprayer Weight Capacity
ST-251BH 207 lbs. Maximum load
(25 Gal. Tank) 260 lbs. Combined Towed Weight
(Attachment + Load)
INSTALLING SPRAYER
CAUTION: Avoid injury!
Before installing sprayer, make sure the
towing vehicle is parked safely.
1. Park machine safely.
(See Towing Machine manual.)
2. Align sprayer drawbar with towing machine drawbar.
3. Install Hitch Pin (44) through sprayer drawbar and
machine drawbar. Secure Hitch Pin with Hairpin Cotter
(48).
CAUTION: Avoid injury! Excessive towed
load can cause loss of traction and loss of
control on slopes. Stopping distance increases
with speed and weight of towed load. Total
towed weight must not exceed combined
weight of pulling machine, ballast and operator.
CAUTION: Avoid injury! If additional
weight is required when towing, add weight at
or forward of the rear wheels. Adding weight
behind the rear wheels can affect machine
steering. Refer to your towing machine manual.
DETERMINING WEIGHT FOR SPRAYER
REMOVING SPRAYER
NOTE: Refer to illustrations in the
Installing Section, earlier in this
manual.
1. Park machine safely.
(See Towing Machine manual.)
2. Unload sprayer tank before
disconnecting hitch towing
vehicle.
3. Remove hairpin cotter and hitch pin.
4. Push sprayer away from machine. Block sprayer wheels.
5. Install hitch pin and hairpin cotter pin in sprayer drawbar
for storage.
CAUTION: Avoid injury! Keep body
parts away from underneath towbar.
Towing capacity will vary with weight of towing machine and
operator.
EXAMPLE:
If Towing Machine Weighs: 400 lbs.
Add Your Weight: 200 lbs.
Combined Weight Equals: 600 lbs.
To maintain stability using the machine in this example, you
cannot safely tow more than 600 lbs. without rst adding
additional ballast to the towing machine.

19 L-1914-F
==================================================================================================
English Manual
OPERATIONOPERATION
CAUTION: Avoid injury!
Care should be used when working around
batteriesUse insulated tools when making
battery connections. Heavy gloves and eye
protection should be worn when making battery
connections.
CAUTION:Avoid Injury! Care should be used
when routing the wiring harness to the sprayer.
Do not place the wiring harness in areas
that the wires can be pinched or damaged.
Place the wires to minimize a tripping hazard
when getting on or off the towing vehicle.
INSTALLING ELECTRICAL CONNECTIONS
1. Select the proper tools to remove the leads to the battery
terminals. Note: If you do not have insulated tools, use
electrical tape to wrap all exposed non-working surfaces
of the tools. It is important to take steps to reduce the
risk of causing an electrical spark.
2. Put on gloves and eye protection.
3. Verify that the read lead is attached to the positive (+)
battery terminal and the black lead is attached to the
negative (-) battery terminal.
4. Remove the battery leads.
5. Attach the red lead (with the fuse) of the Battery
Connecting Wiring Harness and the red lead from your
engine to the positive (+) battery terminal.
6. Using the Battery Connection Wiring Harness (6) attach
the black lead and the black lead from your engine to the
negative (-) battery terminal.
NOTE: The Battery Connection Wiring Harness contains
a 15 amp blade type fuse.
NOTE: If the battery is underneath the seat, ensure that
both battery terminals and battery leads do not make
contact with seat.
7. Attach the Wiring Harness with Switch (5) to the
connector terminal end of the Battery Connection
Wiring Harness (6).
NOTE: In most instances the terminal connector with the
shorter leads from the Wiring Harness with Switch (5)
are connected to the terminal connector on the Battery
Connection Wiring Harness (6). Most users like the
switch to lie in their laps or be convenient to the towing
vehicle operator. The Wiring Harness with Switch (5)
terminal connectors can be reversed to suit the need of
the user.
NOTE: Switch wire harness colors do not need to match
mating connector wire colors for the pump to function.
8. Attach the other end of remaining terminal lead connector
from the Wiring Harness with Switch (5) to the terminal
lead connec-tor coming from the Pump (4). If the pump
begins to run, use the switch to turn the pump off
NOTE: The Battery Connection Wiring Harness (6) can
remain connected to the battery of the towing vehicle
when spraying operations are com-plete. Simply detach
the Wiring Harness with Switch (5) terminal con-nector
from the Battery Connection Wiring Harness (6) terminal
connector.
PUMP OPERATIONS
The pump motor supplied with your sprayer is a “demand
ow” type pump. An internal pressure switch in the pump
turns the pump off when the pressure reaches approximately
75psi. When the pump senses that pressure has dropped (by
triggering the wand) the pump will again start and continue to
run until 75psi is reached.
NOTE: Pump surge should be avoided. It can cause the
pump motor to overheat resulting in damage to the pump.
Refer to the Wand Operations Section for tips on how to
avoid pump surge.

20 L-1914-F
==================================================================================================
WAND
OPERATIONS
English Manual
OPERATION
CAUTION: Avoid Injury!
Always turn the pump off when making
adjustments to the Wand Tip. Wear eye
protection.
The wand can be used
for spraying in various
applications from a steady
stream to a fine mist.
Adjust the spray pattern by
turning the Wand Tip (31)
clockwise for a fine mist or
counterclockwise for a
course spray.
BOOM
OPERATIONS
Boom spraying is the
normal spraying
configuration and is
controlled by the operator
in the seated position.
For spraying in a vertical
orientation such as along
fences or hedges, use the
wand operation.
PUMP SURGE
Pump surge may occur when using the wand for fine mist
applications. Do not allow this to occur. The pump is
designed for continuous duty. Intermittent starting and
stopping will cause the pump motor to overheat. To eliminate
pump surge:
a) Open the wand tip to a higher flow rate
b) Create a bypass that allows the pump to run continuous
by removing one of the boom hoses near the tip (See
Step 11). Remove the tank fill cap and place the hose in
the tank. Open the valve for the boom slowly until the
pump runs continuously. Adjust the wand tip to the
desired mist.
APPLICATION RATE
WAND
Understanding the following information about your sprayer
will help to calibrate the application rate. The sprayer
operates at a fixed pressure of 75 psi. This results in actual
spraying time of 30 minutes using the handgun.
BOOM
Product
ST-251BH
Gallons Per Acre
Gallons Per 1,000 SQ FT
2 mph
56.5
3 mph
37.5
4 mph
28.0
5 mph
22.5
2 mph
1.3
3 mph
0.9
4 mph
0.6
5 mph
0.5
For spraying in a
vertical orientation
such as along fences
or hedges, use the
wand operation.
Normal downward
spraying conguration
and is controlled by the
operator in the seated
position.