Hudson 18539 Instruction Manual

IF YOU HAVE ANY QUESTIONS OR CONCERNS, OR ARE MISSING PARTS

DO NOT RETURN SPRAYER TO THE STORE!

PLEASE CALL OUR CONSUMER HOTLINE AT 1-800-9-SPRAYER

Visit us on the Internet: www.hdhudson.com

(1-800-977-7293)

Instruction 738-554 Model 18539

LIMITED WARRANTY

H. D. Hudson Manufacturing Company warrants to the original purchaser only that this product will continue to
function as intended if used in accordance with operating instructions (under NORMAL CONSUMER USE) for
one year . If the product fails to function as intended—DO NOT RETURN IT TO THE STORE—call our CONSUMER
SERVICE HOTLINE AT 1-800-9-SPRAYER (toll free) for fast service. We will, at our option, repair or replace any
non-functioning parts without charge (shipping and handling charges will apply) H. D. Hudson Manufacturing
Company shall have the option of requiring the return of the non-functioning product to the address listed below
together with the proof of purchase to establish a claim under this warranty. This warranty does not apply to
damage resulting from accident, misuse, neglect, alterations, operation not in accordance with instructions,
commercial use, or normal wear.

ANY IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR
CONSUMER USE, ARE LIMITED TO THE DURATION SPECIFIED ABOVE. H. D. HUDSON MANUFACTURING
COMPANY’S LIABILITY IS LIMITED SOLELY TO THE REPAIR OR REPLACEMENT OF THE NON-FUNCTIONING
PRODUCT OR PART. H. D. HUDSON MANUFACTURING COMPANY EXCLUDES LIABILITY UNDER THIS WARRANTY
FOR ANY AND ALL INCIDENTAL AND CONSEQUENTIAL LOSS OR DAMAGE.

Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of
incidental or consequential damages, so these limitations or exclusions may not apply to you. This warranty
gives you specific legal rights and you may have other rights which vary from state to state.

IF YOU HAVE QUESTIONS OR CONCERNS: PLEASE CALL OUR CONSUMER HOTLINE AT 1-800-9-SPRAYER.

(1-800-977-7293)

WARNING!

The engine must use mixed fuel. The ratio between gasoline and oil is 25:1. You can use either
leaded or unleaded gasoline. The oil should be for two stroke engines. The engine should run
without load for 3-5 minutes after starting and before stopping. Do not run engine without load at
high speed, it can damage the engine. You may also damage the engine by stopping the engine
at high speeds. Always reduce the engine speed before shutting off the unit. To prevent fire, keep
hot engine away from flammable materials when adding fuel. Smoking is strictly prohibited!

CAUTION!

Wear approved, protective clothing, respirator mask and oil-proof gloves to protect operator
from contamination from pesticide. Follow pesticide label directions. In all cases, consider
direction of wind to avoid spray being blown back on operator. Always flush pesticide tank
and supply lines at the end of each period of use. This will help prevent corrosion and damage
to the sprayer and its components. Dispose of pesticide formulations remaining in the tank
and flush the residues in accordance with label directions. Before opening container of
pesticide for use in this sprayer, always read and thoroughly understand directions on its
label. Follow exactly the instructions for mixing, application, disposal and safety. Be sure the
pesticide is appropriate for usage with this sprayer. Keep sprayer and spray material out of
reach of children

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MAIN USES

Thank you for purchasing the Hudson® 18539 Bak-Pak® power duster sprayer. The unit can
be used as a duster or converted to a mist blower. It is suitable for use in the prevention of
plant diseases and controlling pests on large plantations and crop fields where cotton, wheat,
fruit trees, etc. are planted. It can be used for applying herbicides. The unit is also suitable for
sanitation and janitorial work. It can be used to apply granular media.

MAIN FEATURES

1). Tough poly fuel and chemical tanks are translucent,
making it easy to see fluid levels.

2). Poly framework makes the unit strong and light weight.

3). All parts that make contact with the chemicals are poly
or stainless steel.

4). Large 8-3/8” tank opening for easy filling and a filter to
keep dirt and debris out of tank.

5). Adjustable and padded shoulder straps.

6). Unit can be easily changed over from a duster to
a mist blower.

7). Tool kit included.

TECHNICAL SPECIFICATIONS

MODEL

OVERALL DIMENSIONS (IN)

NET WEIGHT (LBS/KG)

CAPACITY OF TANK (GAL/LITER)

FUEL TANK CAPACITY (GAL/LITER)

DISPLACEMENT

18539

11/16 X 16 3/16 X 25 7/16

19

23.2 LBS / 10.5 KG

3.7 GAL / 14.0 LITER

0.26 GAL / 1.0 LITER

42.7 cc

4

1

5

6

POWER

DISCHARGE RATE OF CHEMICAL

SPRAYER MIXTURE (GAL/LITER PER MIN)

DUST (LBS/KG PER MIN)

RANGE (FT/M)

VOLUME RATIO OF MIXTURE FUEL
BETWEEN PETROL AND MOBILE OIL

FAN SPEED (R/MIN)

ENGINE MODEL

IGNITION

STARTER

STOPPING

1.8 kw

UP TO 0.6 GAL / 2.3 LITER per min

UP TO 13.2 LBS / 6 KG per min

UP TO 40 FT / 12 M

25 : 1

6000

725005

CDI

RECOIL STARTER

TYPE OF FULL SHUT FUEL THROTTLE

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INITIAL ASSEMBLY

Assemble the larger end of the flexible hose to the engine elbow with a thumb clamp. The 16”
main tube comes next. The smooth end of the main tube with 4 internal ribs is inserted into
the small end of the flexible hose and secured with a thumb clamp. Slide the metal band of the
handle onto the main tube. Slide your arms through the shoulder straps and lift sprayer onto
your back. Adjust straps for comfort. Set the handle in a comfortable position and tighten the
screws.

ASSEMBLY FOR MIST BLOWER OPERATION

Changing spray plates.

Remove the filler cap from the tank. Remove the two 13mm hex nuts that hold the chemical
tank to the frame. Lift tank off the frame. Remove the dusting plate from frame and replace
with the spraying plate. There is an arrow molded on the spraying plate and it should point
toward the back of the engine.

Tank preparation.

Remove the tank plug and replace with hose connector, gasket, and retainer nut. Attach the
small black rubber hose to hose connector. The collared end of the hose should be attached
to the small pin on the spray plate. The open end of the hose should be placed over the spray
plate well. The clear air hose from the filler cap should be attached to the large barb on the
spray plate.

Hose preparation.

Loosen up the main tube thumb clamp. Insert the mounting plate of the fluid on/off switch
under the thumb clamp band. Retighten thumb clamp. Assemble the 17” bent discharge tube
to the main tube. Assemble the spray nozzle to the bent tube. Attach one end of the shorter
clear fluid hose to the inlet side of the on/off switch. Fasten with spring clamp. Attach the
other end to the hose connector on the tank. Fasten with spring clamp. Attach the longer clear
fluid hose to the outlet side of the on/off switch. Fasten with spring clamp. Attach the other
end to the spray nozzle. Fasten with the larger spring clamp from the tool kit.

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