Atlas 56936 Assembly instructions

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Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 19k
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.
Copyright© 2019 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 an d se rv ic e may n ot b e in cl uded.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

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Safety ......................................................... 2
Specifications ............................................. 6
Setup .......................................................... 6
Operation .................................................... 2
Maintenance ............................................... 2
Parts List and Diagram .............................. 12
Warranty .................................................... 16
TINPOPU%HKQ;LVH%IPW%W6AOPOJOLPH
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.
OQMLNJIPJ%HIA6JK%OPHJNSRJOLPH
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1. IZ&"9%W,83*(&'#%68Z"(&85*8$%E%%
Do not use appliances in damp or wet locations.
2. W&%P&$%S#*%O8%N,"81
3. [**/%R."79(*8%I),<%E All visitors should
be kept at a distance from work area.
4. W(*##%M(&/*(7<%E Do not wear loose clothing or
jewelry. They can be caught in moving parts.
Use of rubber gloves and substantial footwear
is recommended when working outdoors.
Wear protective hair covering to contain long hair.
5. T*,(%IPHOE,//(&Z*9%#,2*$<%3&337*#C%%
.,(9%.,$%,89%.*,Z<E9'$<%('++*(%
)&(X%37&Z*#1% Use face or dust mask
if operation is dusty.
6. T*,(%$."4X%Y*,8#%,89%#$**7E$&*9%
)&(X%+&&$#%$&%.*7/%/(*Z*8$%"8Y'(<%
4,'#*9%+<%27<"83%9*+("#1
7. S#*%N"3.$%I//7",84*%E Do not use appliance
for any job except that for which it is intended.
8. IZ&"9%S8"8$*8$"&8,7%H$,($"83%E
Do not carry appliance with finger on switch.
9. Don’t grasp the exposed cutting blades or cutting
edges when picking up or holding the appliance.
10. W&%P&$%A&(4*%I//7",84*%E%It will do the
job better and with less likelihood of injury
at the rate for which it was designed.
11. W&%8&$%LZ*((*,4.%E%
Keep proper footing and balance at all times.
12. H$,<%I7*($%E Watch what you are doing. Use
common sense. Do not operate appliance when
you are tired.
13. H$&(*%O97*%I//7",84*#%O89&&(#%E%When not in use,
appliances should be stored indoors in dry, and
high or locked-up place - out of reach of children.

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14. Q,"8$,"8%I//7",84*%T"$.%R,(*%E%Keep cutting
edge sharp and clean for best performance and
to reduce the risk of injury. Follow instructions
for lubricating and changing accessories. Keep
handles dry, clean, and free from oil and grease.
15. R.*4X%W,5,3*9%M,($#%E%Before further use of the
appliance, a guard or other part that is damaged
should be carefully checked to determine that it will
operate properly and perform its intended function.
Check for alignment of moving parts, binding of
moving parts, breakage of parts, mounting, and any
other condition that may affect its operation. A guard
or other part that is damaged should be properly
repaired or replaced by a qualified technician
unless indicated elsewhere in this manual.
16. Keep guards in place and in working order.
17. Keep hands and feet away from cutting area.
18. Wear full eye protection and protective clothing.
19. If electrolyte contacts the skin, wash
it off immediately with water.
20. If electrolyte contacts the eyes, flush thoroughly and
immediately with water. Seek medical attention.
21. H$&/%)&(X"83%).*8%<&'%2**7%$"(*9%&(%*\.,'#$*91
Make regular breaks to rest.
22. 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.
23. T.*8%#*(Z"4"83%'#*%&87<%"9*8$"4,7%
(*/7,4*5*8$%/,($#1
24. W"#4&88*4$%I//7",84*%E%Remove Battery Pack
when not in use, before servicing, when changing
accessories such as blades, and the like.
25. R,(*2'77<%2&77&)%4'$$"83%/(&4*9'(*#%
*\/7,"8*9%"8%$."#%5,8',71%They are specifically
planned to reduce risk to the operator.
26. L87<%(*/7,4*%$.*%7"8*%&8%$."#%,//7",84*%)"$.%
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1. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to battery pack, picking up or carrying the
power tool. Carrying the power tool with your
finger on the switch or energizing power tool
that have the switch on invites accidents.
2. Disconnect the battery pack from the power
tool before making any adjustments, changing
accessories, or storing power tool. Such
preventive safety measures reduce the risk
of starting the power tool accidentally.
3. Recharge only with the charger specified by
the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of
fire when used with another battery pack.
4. Use power tools only with specifically designated
battery packs. Use of any other battery
packs may create a risk of injury and fire.
5. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from
one terminal to another. Shorting the battery
terminals together may cause burns or a fire.
6. Under abusive conditions, liquid may be
ejected from the battery; avoid contact.
If contact accidentally occurs, flush with
water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the
battery may cause irritation or burns.
7. Do not use a battery pack or power tool that is
damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.

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8. Do not expose a battery pack or power tool to
fire or excessive temperature. Exposure to fire or
temperature above 265°F may cause explosion.
9. Follow all charging instructions and do not charge
the battery pack or power tool outside of the
temperature range specified in the instructions.
Charging improperly or at temperatures
outside of the specified range may damage
the battery and increase the risk of fire.
10. Have servicing performed by a qualified
repair person using only identical
replacement parts. This will ensure that the
safety of the product is maintained.
11. Do not modify or attempt to repair the power
tool or the battery pack except as indicated
in the instructions for use and care.
12. The battery Charger gets hot during use.
The Charger’s heat can build up to
unsafe levels and create a fire
hazard if it does not receive
adequate ventilation, due to an electrical fault, or if it
is used in a hot environment. Do not place the
Charger on a flammable surface. Do not obstruct
any vents on the Charger. 6#/*4",77<%,Z&"9%
/7,4"83%$.*%R.,(3*(%&8%4,(/*$#%,89%('3#]%$.*<%
,(*%8&$%&87<%27,55,+7*C%+'$%$.*<%,7#&%&+#$('4$%
Z*8$#%'89*(%$.*%R.,(3*(1%%Place the Charger on a
stable, solid, nonflammable surface (such as a
stable metal workbench or concrete floor) at least 1
foot away from all flammable objects, such as
drapes or walls. Keep a fire extinguisher and a
smoke detector in the area. Frequently monitor the
Charger and Battery Pack while charging.
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3. Charge Battery Pack only according
to its Charger’s instructions.
4. Inspect Battery Pack before every use;
do not use or charge if damaged.
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This appliance 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 appliances 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 appliance. 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 appliances with the lowest vibration when
there is a choice between different processes.
5. Include vibration-free periods each day of work.
6. Grip appliance as lightly as possible
(while still keeping safe control of it).
Let the appliance do the work.
7. To reduce vibration, maintain the appliance
as explained in this manual. If any abnormal
vibration occurs, stop use immediately.

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1. The spool will continue to rotate for a few seconds
after use. Allow it to stop completely and remove
Battery Pack before putting the appliance down,
making any adjustments, or servicing the appliance.
2. Do not use in rain, snow, sprinklers, or wet grass.
Do not rinse off the Trimmer.
3. Use only during daylight hours.
4. Carefully inspect the spool housing and guard
before inserting Battery Pack in the Trimmer. Do
not use Trimmer if any part is cracked or damaged.
5. Do not use appliance for other than intended use.
6. Maintain labels and nameplates on the appliance.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
7. 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.
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'#*1%%O2%$.*%/7'3%)"77%8&$%2"$%$.*%&'$7*$C%.,Z*%,%/(&/*(%&'$7*$%"8#$,77*9%+<%,%B',7"2"*9%*7*4$("4",81
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P&$*- Extension cords must not be used with this item’s Charger.
H<5+&7&3<
!Volts
dAlternating Current
IAmperes
n0 xxxx/min. No Load Revolutions per Minute (RPM)
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
Read the manual before
set-up and/or use.
WARNING marking
concerning Risk of Fire.
Do not cover Charger
ventilation ducts.
Charge on fireproof surface only.
WARNING marking concerning
Risk of Electric Shock.
Properly connect Charger’s power
cord to appropriate outlet.

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Battery Type Atlas Li-Ion 40V (57008) or
40/80V (57014) (sold separately)
Atlas Li-Ion 40/80V (57014)
(sold separately)
Charger Type 56993 or 56997 Atlas Li-ion
No Load Speed 6000 RPM
Replacement Line Type .080″ Nylon
I5+"*8$%J*5/*(,$'(*%N,83*#
Operation 6.8 - 104°F
Battery charging 39 - 104°F
String trimmer storage -4 - 158°F
Battery storage 1 year 32 - 73°F
3 month 32 -113°F
1 month 32 -140°F
P&$*- Batteries and Battery Chargers sold separately.
H*$'/%E%;*2&(*%S#*-
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P&$*- For additional information regarding the parts listed in the following pages,
refer to the Assembly Diagram near the end of this manual.
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1. Turn Trimmer Head upside down and
remove two Screws from head.
2. Place Guard onto Trimmer Head. See below.
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3. Align holes on the Guard with holes on Trimmer
Head and use Screws to secure together.
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4. Carefully remove the protective tape/
cover from the blade on the guard.
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1. Turn Trimmer Head upside down and remove
Screws, Washers, and Spacers from Head.
2. Place Guard onto Trimmer Head.
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3. Align holes on the Guard with holes on
Trimmer Head and use Screws, Washers,
and Spacers to secure together.
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4. Carefully remove the protective tape/
cover from the blade on the guard.

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1. Loosen the screw on the open end of the Coupler.
2. Align Release Button with the open slot on the
Coupler and slide the two shafts into each other.
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3. Adjust the lower shaft until Release
Button locks into Slot.
4. Tighten coupler screw with Hex Wrench.
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1. Use a screwdriver to remove Screws
from Auxiliary Handle.
2. Place Auxiliary Handle and Clamp onto the
shaft and use Screws to connect together.
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3. Adjust Handle to desired position
and tighten Screws to secure.

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Charge battery before using this tool. Follow instructions included with battery charger ( sold separately).
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1. To install: Slide Battery Pack into slot on back
of String Trimmer until it clicks into place.
2. To remove: Press Battery Pack Release
Button and pull Battery Pack out of slot.
;'5/%A**9
P&$*- Trimmer features a bump feed mechanism
to adjust line length after repeated use.
1. Adjust length of cutting line by bumping Head
against the ground during operation.
2. The line will lengthen slightly the next
time the trimmer is used. Excess line will
be cut off by the blade in the guard.
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1. Remove Battery Pack.
2. Remove screws from cut-off blade under guard.
3. Turn cut-off blade 180°.
4. Tighten blade screws to secure.
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1. Install fully-charged Battery Pack.
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avoid contact with fences, trees, shrubs and the like.
2. Holding Trimmer with both hands, press
Trigger Lock, then press Trigger.
3. WL%PLJ%N6HJ%JNOQQ6N%LP%UNLSPW1
4. Do not force the Trimmer. Use the
tip of the Line to do the cutting.
5. Release Trigger when done.
6. When finished, to prevent accidents:
• Remove battery pack.
• Wipe external surfaces of the appliance
with clean cloth. Store in an indoor
dry area out of reach of children.

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1. ;6ALN6%6IR^%SH6C 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. IAJ6N%SH6C Remove Battery Pack and wipe
external surfaces of the appliance with clean cloth.
3. Li-Ion BATTERY MUST BE RECYCLED OR
DISPOSED OF PROPERLY.
Do not short, incinerate or open battery.
4. Store Battery Pack, Charger, and tool in dry, indoor
area out of reach of children and away from metal
objects (i.e., paperclips, coins) to prevent shorting.
5. All parts are permanently lubricated.
Do not use additional lubrication.
N*/7,4"83%H/&&7
1. Remove Battery Pack.
2. Press both tabs marked ‘Push’ on the
Trimmer Head to release Spool Cover.
3. Remove Spool Cover, then remove
Spool from Trimmer Head.
J("55*(%
^*,9
H/&&7%
R&Z*(
H/&&7
4. Clean interior of Trimmer Head with soft cloth.
5. Replace Spool.
6. Replace Spool Cover.

Page 11A&(%$*4.8"4,7%B'*#$"&8#C%/7*,#*%4,77%DEFFFEF>>E=G?G1Item 56936 56939
HIA6JKLM6NIJOLPQIOPJ6PIPR6 H6JSM
N*/7,4"83%P<7&8%V"8*
JL%MN6!6PJ%H6NOLSH%OPeSNK-%
L87<%(*/7,4*%$.*%7"8*%&8%$."#%,//7",84*%)"$.%$.*%7"8*%5,$*(",7%,89%9",5*$*(%&2%7"8*%7"#$*9%&8%
$.*%H/*4"2"4,$"&8#%$,+7*1%%L$.*(%5,$*(",7#C%#'4.%,#%)"(*C%(&/*C%&(%+7,9*#%4,8%9,5,3*%$.*%
,//7",84*%,89%+*%2&(4*2'77<%,89%9,83*(&'#7<%*Y*4$*9%2(&5%$.*%,//7",84*%'/&8%+(*,X"831
1. Remove Battery Pack.
2. Press tabs on Spool Cover, remove Spool Cover,
then remove Spool from Trimmer Head.
3. Remove old line from Spool.
4. Clean interior of Trimmer Head with soft cloth.
5. Replace Spool and Spool Cover, making sure
both triangles are lined up with each other.
H/&&7
H/&&7%
R&Z*(
PLJOR6- For best performance with 56936, use
a line that is .080″ in diameter and no more than
13’ in length. For 56939, use a line that is .095″
in diameter and no more than 10’ in length.
6. Insert Nylon Line into hole marked ‘Line In’ and
make sure it exits cleanly through the other hole.
7. Pull line through until there is an
equal length on both sides.
8. Turn Spool counterclockwise to feed line into
Trimmer Head. Leave 5″ of line on each side.
MV6IH6%N6IW%J^6%ALVVLTOPU%RIN6ASVVK
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.
N*4&(9%M(&9'4$g#%H*(",7%P'5+*(%^*(*-%
P&$*- If product has no serial number, record month and year of purchase instead.

Page 12 A&(%$*4.8"4,7%B'*#$"&8#C%/7*,#*%4,77%DEFFFEF>>E=G?G1 Item 56936 56939
HIA6JK LM6NIJOLP QIOPJ6PIPR6H6JSM
M,($ W*#4("/$"&8 h$<
1 Hex Socket Screw 13
2 Right Handle 1
3 Heat-Shrink Tube 1
4 Heat-Shrink Tube 1
5 Male Terminal Assembly 1
6 Left Handle 1
7 PCB 1
8 Connector 5
9 Wire Retaining Plate 1
10 U-Shaped Clamp 1
11 Upper Tube 1
12 Lower Tube 1
13 Anti-Lock Button 1
14 Lockout Torsional Spring 1
15 Switch Trigger 1
16 Spring Wire 1
17 Pan Head Screws With Cross Recess 1
18 Spring Washer 1
19 Flat Washer 1
20 Tube Binder 1
21 Bolt 1
22 Assist Handle 1
23 Cross Recessed Hex Bolt 2
24 Auxiliary Handle Cover 1
25 Rubber Pad 1
26 Wire Retaining Plate 1
27 Heat-Shrink Tube 1
28 Ribbon 2
29 Corrugated Pipe 1
M,($ W*#4("/$"&8 h$<
30 Hex Socket Screw 10
31 Right Housing 1
32 Wire Retaining Plate 1
33 Speed-Control Switch 1
34 Dust Sponge 2
35 Volute 1
36 Motor 1
37 Shaft Sleeve 1
38 Deep Groove Ball Bearing 1
39 Spur Gear 1
40 Motor Fixed Plate 1
41 Hex Socket Head Cap Screw 2
42 Spur Gear 1
43 Shaft 1
44 Deep Groove Ball Bearing 1
45 Shaft Sleeve 1
46 Cross Recessed Screw 4
47 Fan Blade Ring 1
48 Circlip 1
49 Spring Washer 2
50 Head Assembly 1
51 Cross Recessed Screw 2
52 Right Housing 1
53 Cross Recessed Screw 2
54 Guard 1
55 Blade 1
56 Hex Head Bolt 1
57 Spring Washer 2
M,($#%V"#$%,89%W",3(,5
=>?@>%M,($#%V"#$
P&$*- Some parts are listed and shown for illustration purposes only, and are not available individually
as replacement parts. Parts may not be interchangeable. Specify item number when ordering.

Page 13A&(%$*4.8"4,7%B'*#$"&8#C%/7*,#*%4,77%DEFFFEF>>E=G?G1Item 56936 56939
HIA6JKLM6NIJOLPQIOPJ6PIPR6 H6JSM
=>?@>%I##*5+7<%W",3(,5

Page 14 A&(%$*4.8"4,7%B'*#$"&8#C%/7*,#*%4,77%DEFFFEF>>E=G?G1 Item 56936 56939
HIA6JK LM6NIJOLP QIOPJ6PIPR6H6JSM
=>?@?%M,($#%V"#$
M,($ W*#4("/$"&8 h$<
1 Hex Lobular Socket Thread Screw 13
2 Right Handle 1
3 Wire Retaining Plate 1
4 Male Terminal Assembly 1
5 Connector 4
6 PCB 1
7 Left Handle 1
8 U-Shaped Clamp 1
9 Spring Wire 1
10 Switch Trigger 1
11 Lockout Torsional Spring 1
12 Anti-Lock Button 1
13 Speed-Control Switch 1
14 Upper Tube 1
15 Lower Tube 1
16 Nut 1
17 Harness Clip 1
18 Harness Buckle 1
19 Bolt 1
20 Assist Handle 1
21 Bolt 2
22 Auxiliary Handle Cover 1
23 Rubber Pad 1
24 Wire Retaining Plate 1
25 Heat-Shrink Tube 1
26 Corrugated Pipe 1
27 Nut 2
28 Bolt 1
M,($ W*#4("/$"&8 h$<
29 Tube Binder 1
30 Bolt 2
31 Guard 1
32 Blade 1
33 Bolt 2
34 Heat-Shrink Tube 1
35 Copper Strip 1
36 Hexalobular Socket Pan Head Screw 3
37 Top Cover 1
38 Motor Housing 1
39 Bolt 1
40 Bolt 1
41 Bolt 2
42 Motor 1
43 Rubber Pad 1
44 Bolt 2
45 Wire Retaining Plate 1
46 Motor Fixing Plate 1
47 Bolt 6
48 Shaft Sleeve 1
49 Bolt 4
50 Fan Blade Ring 1
51 Head Assembly 1
52 Ribbon 2
53 Heat-Shrink Tube 1
54 Heat-Shrink Tube 1
P&$*- Parts may not be interchangeable. Specify item number when ordering.

Page 15A&(%$*4.8"4,7%B'*#$"&8#C%/7*,#*%4,77%DEFFFEF>>E=G?G1Item 56936 56939
HIA6JKLM6NIJOLPQIOPJ6PIPR6 H6JSM
=>?@?%W",3(,5

V"5"$*9%?`%W,<%T,((,8$<
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.
i>=aD%I3&'(,%N&,9%%j%%R,7,+,#,#C%RI%?D@`i%%j%%DEFFFEF>>E=G?G