Hudson Bak-Pak 13194 Product Instructions

Instruction 871-785 Model 13194

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.

WARNING!

WARNING!!! THIS PRODUCT IS DESIGNED TO APPLY CHEMICALS THAT MAY BE HARMFUL AND COULD

CAUSE SERIOUS PERSONAL INJURY IF INHALED OR BROUGHT INTO CONTACT WITH THE USER. FAILURE TO

READ AND FOLLOW OWNER’S MANUAL INSTRUCTIONS BEFORE USE AND/OR MISUSE OF THIS PRODUCT

COULD RESULT IN EXPLOSIVE FAILURE WITH MAJOR INJURIES.

MAIN FUNCTION

This commercial Bak-Pak® sprayer is comfortable to use and sprays evenly. It’s especially suitable for
the prevention and cure of diseases and insect infestation on crops, blowers, plants and gardens, for the
environmental sanitation of public places, and for the epidemic prevention and sanitation of livestock poultry
sheds.

STRUCTURE OF SPRAYER

1. Container to hold liquids 4. Operation arm and components

2. Pump and air chamber 5. Backpack belt system

3. Spraying System (including rubber hose and components, switch, sprayer spindle and head)

WORKING PRINCIPLE

Through the swing of the operation arm and components, the pump bowl rises up and down so that the sealing
ball turns on and off, which makes the pressure in the air chamber also rise up and down, impeling the liquid to
get into the chamber. The liquid goes through the spraying system and flows out as spray.

CHARACTERISTICS:

1. The external form is the imitation of the human body’s back curve. The combination of the air chamber and
pump located in the liquid container makes the whole structure compact, safe and leak-resistant.

2. The operation arm uses an action connecting style so that it can be installed on both sides. It’s convenient and
quick in action, and while it is in use, the operation arm does not separate easily-making it easier for the user to
operate the sprayer with the right or left hand.

3. Use the various spray heads for different tasks and to adjust between fine spray and coarse spray patterns.

4. Chosen materials for the sprayer are excellent, resistant to acid, corrosion, and alkalinity. The sprayer is sealed
hermetically and very durable.

OPERATION METHOD

After the sprayer carton is opened, please check to see that all parts conform to the packing list. Then assemble
the sprayer, using the diagram as reference. Before use, please twist off the cap of the container. Fill the liquid
through the filter into the container slowly. Then close the cap tightly and place the sprayer on your back. Swing
the operation arm, after the pressure of the air chamber is boosted. Pinch the switch component to begin spray
operation. It can be point-spray and also can be used as continuous spray.
Choose the different spray head for spraying correctly.
3 types of spray heads are included.

1. Fan style spray head: This sprays evenly, suitable for spraying on medium-height
and short plants. For spraying weed killer, keep the spray head stable and
spray with the direction of any wind.

2. Cone spray head: This can be used for spraying pesticides and insecticides
and to prevent diseases.

3. 4-hole adjustable spray head: Used for spraying tall bushes and fruit trees.

PARAMETERS AND SPRAY-HEAD FLOW RATE

1. Type: Bak-Pak® Sprayer 4. Operation Travel: 60-80mm

2. Container Capacity: 4 gallons, 15 liters 5. Bowl Diameter: 45mm

3. Operation Pressure: 0.3-0.4 MPA 6. Net Weight: 3.2kg

IMPORTANT POINTS

Nozzle Type

1. Before turning on the switch, do not swing the operation arm continuously for a long time- this will avoid
damage of the sprayer.

2. While spraying pesticides, the user must wear mask and gloves, to avoid the pesticide directly touching the
skin and damaging the body. Don’t spray pesticide towards the wind. Do not spray pesticides near people,
animals and foodstuff. Don’t operate under high temperature for a long time.

3. While handling the pesticide, please comply with the safety directives seriously.

4. Do not use with strong acid and alkali liquids. Do not use highly-toxic or highly-residual pesticides
on vegetables, melons, gourds, fruits and medicinal herbs. After applying pesticides, according to the
manufacturer’s directions, do not eat vegetables for several days.

5. After spraying, clean the sprayer, to prevent liquids from corroding the sprayer or blocking up the spray head.
Avoid residual pesticide mixed with the next pesticide used. This may cause a chemical reaction and influence
the effect of the pesticide.

Pressure MPA

Flow Rate

L/min.

Nozzle Type

Pressure MPA

Flow Rate

L/min.

6. For extended periods of non-usage or continuous usage for several days, add Vaseline to the seals, o-ring and
moving parts to reduce wear of parts.

TROUBLE SHOOTING

PROBLEM CAUSE SOLUTION

Leakage or
spraying poorly

Pump handle is hard
to move.

Low pressure. Bowl or sealing ball worn. Replace bowl or sealing ball.

Sealing plate is
damaged or loose.

Spray nozzle or filter
blocked.

Replace sealing plate or
tighten.

Rinse filter and nozzle
with water. Add Vaseline
to moving parts.

Pump handle moves too
easily-no pressure.

Seal is missing. Properly position new seal.