Hercules HA31 User manual

1-1/8″ HEX DUST EXTRACTION ATTACHMENT
WARNING: To prevent serious injury, User must read and
understand Owner’s Manual. SAVE THIS MANUAL.
When unpacking, make sure that the product is intact and undamaged.
If any parts are missing or broken, please call 1-888-866-5797
as soon as possible. Reference 59101.
Owner’s Manual &
Safety Instructions
22e
Model
HA31

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Table of Contents
Safety ...................................................................... 2
Specifications ...........................................................4
Setup ....................................................................... 4
Assembly ................................................................. 5
Maintenance ......................................................... 6
Parts List and Assembly Diagram ......................... 7
Warranty ............................................................... 8
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INFORMATION
When using an electrical appliance, basic precautions should always be followed, including the following:
READ ALL INSTRUCTIONS BEFORE USING APPLIANCE.
To reduce the risk of fire, electric shock, or injury:
1. Do not leave appliance when plugged in. Unplug
from outlet when not in use and before servicing.
2. Do not expose to rain. Store indoors.
3. Do not allow to be used as a toy. Close attention
is necessary when used by or near children.
4. Use only as described in the manual. Use only
manufacturer’s recommended attachments.
5. Do not use with damaged cord or plug.
If appliance is not working as it should, has been
dropped, damaged, left outdoors, or dropped
into water, return it to a service center.
6. Do not pull or carry appliance by cord, use cord as
a handle, close a door on cord, or pull cord around
sharp edges or corners. Do not run appliance
over cord. Keep cord away from heated surfaces.
7. Do not unplug appliance by pulling on cord.
To unplug, grasp the plug, not the cord.
8. Do not handle plug or appliance with wet hands.
9. Do not put any object into openings. Do not use
with any opening blocked; keep free of dust, lint,
hair, and anything that may reduce air flow.
10. Keep hair, loose clothing, fingers, and all parts of
body away from openings and moving parts.
11. Turn off all controls before unplugging.
12. Use extra care when cleaning on stairs.
13. Do not use to pick up flammable or
combustible liquids, such as gasoline, or use
in areas where they may be present.
14. Connect appliance to a properly grounded
outlet only.Do not pick up anything
that is burning or smoking, such as
cigarettes, matches, or hot ashes.

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15. To reduce the risk of health hazards from vapors
or dusts, do not vacuum toxic materials unless
a HEPA filter is used. Do not use or store near
hazardous materials. Wood dust mixtures are
highly flammable and can be explosive.
16. Do not introduce sparks or sources
of ignition into the product.
17. Do not leave wood dust in a building or vehicle.
Keep fire extinguishers handy at all times.
18. Can be used for collecting non-flammable liquids.
Dispose of waste in a FIRE SAFE AREA.
19. Stay alert, watch what you are doing and use
common sense when operating an appliance. Do not
use an appliance while you are tired or under the
influence of drugs, alcohol or medication.
A moment of inattention while operating appliances
may result in serious personal injury.
20. Maintain labels and nameplates
on the appliance. These carry important safety
information. If unreadable or missing, contact
Harbor Freight Tools for a replacement.
21. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to heart pacemaker could cause
pacemaker interference or pacemaker failure.
22. The warnings, precautions, and instructions
discussed in this instruction 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.
Vibration Safety
This tool vibrates during use.
Repeated or long-term exposure to vibration may
cause temporary or permanent physical injury,
particularly to the hands, arms and shoulders.
To reduce the risk of vibration-related injury:
1. Anyone using vibrating tools regularly or for an
extended period should first be examined by a
doctor and then have regular medical check-ups to
ensure medical problems are not being caused or
worsened from use. Pregnant women or people who
have impaired blood circulation to the hand, past
hand injuries, nervous system disorders, diabetes,
or Raynaud’s Disease should not use this tool.
If you feel any symptoms related to vibration (such
as tingling, numbness, and white or blue fingers),
seek medical advice as soon as possible.
2. Do not smoke during use. Nicotine reduces
the blood supply to the hands and fingers,
increasing the risk of vibration-related injury.
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration
when there is a choice.
5. Include vibration-free periods each day of work.
6. Grip tool as lightly as possible (while still keeping
safe control of it). Let the tool do the work.
7. To reduce vibration, maintain the tool as
explained in this manual. If any abnormal
vibration occurs, stop use immediately.
SAVE THESE INSTRUCTIONS.

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SPECIFICATIONS
Shroud 1-1/8″ Hex
Vacuum Nozzle 2.1″ Outer Diameter
1-3/4″ Inner Diameter
Flexible Hose 39″L
SETUP - BEFORE USE:
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.
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Turn the Power Switch of the appliance off and
unplug the appliance from its electrical outlet
before performing any procedure in this section.
Note: For additional information regarding the
parts listed in the following pages, refer to the
Parts List near the end of this manual.
1. Carefully inspect the condition of the Dust Extraction
Attachment parts before use. Check for damaged
parts. Do not use and replace any damaged part.
2. Use only identical replacement parts. Use
of any other part will void warranty.
3. Use the right part for the job. Do not modify the
Dust Extraction Attachment or use its parts for
a purpose for which they were not intended.
4. Do not use the Attachment for metal swarf,
which may produce risk of fire.
5. Keep hose away from sharp objects
and excessive heat.

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ASSEMBLY
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.
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure that the trigger is in the off-position
and unplug the appliance from its electrical outlet
before performing any procedure in this section.
1. Hex chisel must be installed on tool before
assembling the Extraction Attachment.
2. Release Band Clamp Lever on Housing.
3. Press Release Lever on Housing and pull free
end of Band completely out of Housing.
Release
Lever
Band
Band Clamp
Lever
Housing
4. Place Housing against tool. Wrap band
around tool and insert free end of band
back through Release Lever.
Hammer
Column
5. Close Band Clamp Lever.
6. Make sure Housing is tight against tool, then adjust
band as needed at Release Lever until tight. Make
sure there is no movement or slipping of the Housing.
7. Spread Shield open and install on bit 2-to-
4 inches from the point. When properly
positioned, snap the Shield closed.
2-4″
8. Push Hose into slot on Housing.
9. Minimize any slack from Hose leading down to
Shield. Additional adjustment can be made by
opening Band Clamp Lever and sliding the Housing
on the hammer column. Retighten Band Clamp Lever.
10. Connect hose from vacuum system (not
provided) into Adaptor on Attachment.

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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.
MAINTENANCE AND SERVICING
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Turn the Power Switch of the appliance off and
unplug the appliance from its electrical outlet
before performing any procedure in this section.
TO PREVENT SERIOUS INJURY
FROM APPLIANCE FAILURE:
Do not use damaged equipment.
If abnormal noise or vibration occurs, have
the problem corrected before further use.
CAUTION! After installation, check the
condition of accessory parts during use. If
any damage is seen, stop immediately and
replace part before continuing use.
Cleaning, Maintenance, and Lubrication
1. BEFORE EACH USE, inspect the
general condition of the appliance. Check for:
• loose hardware,
• misalignment or binding of moving parts,
• cracked or broken parts,
• damaged electrical wiring, and
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces of the
tool with a clean cloth. Store in an indoor
dry area out of reach of children.
3. DAILY: With a soft brush, cloth, or vacuum, remove
debris from the Dust Extraction Attachment.

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PARTS LIST AND ASSEMBLY DIAGRAM
Part Description Qty
1 Band 1
2 Interlock Shelf 1
3 Rivet Ø3x28 3
4 Band Clamp Lever 1
5 Spring Pin Ø3x20 1
6 Rivet (Al) Ø4x12 2
7 Clamp Bracket 1
8 Housing 1
Part Description Qty
9 Lock Spline Bracket 1
10 Release Lever 1
11 Spring 1
12 Corrugated Pipe 1m 1
13 Threaded Sleeve 1
14 Shield 1
15 Adapter 1
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
available individually as replacement parts.
Specify UPC 193175454652 when ordering parts.

LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability
standards, and warrants to the original purchaser that this product is free from defects in materials
and workmanship for the period of 90 days from the date of purchase. This warranty does not apply to
damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of maintenance.
We shall in no event be liable for death, injuries to persons or property, or for incidental, contingent,
special or consequential damages arising from the use of our product. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation of exclusion
may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
Copyright©2021 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.
26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797