Bauer Hypermax Lithium 1791C-B1, Hypermax Lithium 1792C-B1 Owner's Manual & Safety Instructions

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� 18i

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© 2018 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�

Too l s r e q ui r e d f o r a s s em b l y a n d s e rv i c e m a y n o t b e i n c lu d e d�

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65,"7%&'(%$*4.8"4,7%#'//&($%,$-%/(&9'4$#'//&($:.,(+&(2(*"3.$14&5

Read this material before using this product�
Failure to do so can result in serious injury�
SAVE THIS MANUAL�

Safety ���������������������������������������������������������������������2
Specifications ���������������������������������������������������������7
Setup ����������������������������������������������������������������������7

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Operation ����������������������������������������������������������������8

G,+7*%&2%O&8$*8$#

Maintenance ����������������������������������������������������������11
Parts List and Diagram ������������������������������������������12
Warranty ����������������������������������������������������������������16

QFKMLMR%EHNSITE%FMU%U6;LMLGLIME

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�

LNJIKGFMG%EF;6GH%LM;IKNFGLIM

R*8*(,7%J&)*(%G&&7%E,2*$V%Q,(8"83#

K*,9%,77%#,2*$V%),(8"83#=%"8#$('4$"&8#=%"77'#$(,$"&8#%,89%#/*4"2"4,$"&8#%/(&W"9*9%)"$.%$."#%/&)*(%$&&71%

Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

E,W*%,77%),(8"83#%,89%"8#$('4$"&8#%2&(%2'$'(*%(*2*(*84*1

The term “power tool” in the warnings refers to your mains-operated (corded)
power tool or battery-operated (cordless) power tool.

1� Q&(X%,(*,%#,2*$V

a� Y**/%)&(X%,(*,%47*,8%,89%)*77%7"$1%

Cluttered or dark areas invite accidents.

b� U&%8&$%&/*(,$*%/&)*(%$&&7#%"8%

*Z/7&#"W*%,$5&#/.*(*#=%#'4.%,#%"8%
$.*%/(*#*84*%&2%27,55,+7*%7"<'"9#=%
3,#*#%&(%9'#$1%Power tools create sparks

which may ignite the dust or fumes.

c� Y**/%4."79(*8%,89%+V#$,89*(#%,),V%

)."7*%&/*(,$"83%,%/&)*(%$&&71%Distractions

can cause you to lose control.

Page 2 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

2� 67*4$("4,7%#,2*$V

a� J&)*(%$&&7%/7'3#%5'#$%5,$4.%$.*%&'$7*$1%

M*W*(%5&9"2V%$.*%/7'3%"8%,8V%),V1%U&%8&$%'#*%
,8V%,9,/$*(%/7'3#%)"$.%*,($.*9%[3(&'89*9\%
/&)*(%$&&7#1%Unmodified plugs and matching

outlets will reduce risk of electric shock.

b� FW&"9%+&9V%4&8$,4$%)"$.%*,($.*9%&(%

3(&'89*9%#'(2,4*#=%#'4.%,#%/"/*#=%
(,9",$&(#=%(,83*#%,89%(*2("3*(,$&(#1%

There is an increased risk of electric shock
if your body is earthed or grounded.

c� U&%8&$%*Z/&#*%/&)*(%$&&7#%$&%(,"8%&(%)*$%

4&89"$"&8#1%Water entering a power tool

will increase the risk of electric shock.

d� U&%8&$%,+'#*%$.*%4&(91%M*W*(%'#*%$.*%4&(9%

2&(%4,((V"83=%/'77"83%&(%'8/7'33"83%$.*%/&)*(%
$&&71%Y**/%4&(9%,),V%2(&5%.*,$=%&"7=%#.,(/%
*93*#%&(%5&W"83%/,($#1%Damaged or entangled

cords increase the risk of electric shock.

e� Q.*8%&/*(,$"83%,%/&)*(%$&&7%&'$9&&(#=%

'#*%,8%*Z$*8#"&8%4&(9%#'"$,+7*%2&(%&'$9&&(%
'#*1%Use of a cord suitable for outdoor

use reduces the risk of electric shock.

f� L2%&/*(,$"83%,%/&)*(%$&&7%"8%,%9,5/%7&4,$"&8%

"#%'8,W&"9,+7*=%'#*%,%3(&'89%2,'7$%4"(4'"$%
"8$*(('/$*(%[R;OL\%/(&$*4$*9%#'//7V1%Use of

a GFCI reduces the risk of electric shock.

3� J*(#&8,7%#,2*$V

a� E$,V%,7*($=%),$4.%).,$%V&'%,(*%9&"83%,89%

'#*%4&55&8%#*8#*%).*8%&/*(,$"83%,%
/&)*(%$&&71%U&%8&$%'#*%,%/&)*(%$&&7%)."7*%
V&'%,(*%$"(*9%&(%'89*(%$.*%"827'*84*%&2%
9('3#=%,74&.&7%&(%5*9"4,$"&81%%A moment

of inattention while operating power tools
may result in serious personal injury.

b� P#*%/*(#&8,7%/(&$*4$"W*%*<'"/5*8$1%F7),V#%

)*,(%*V*%/(&$*4$"&81%%Protective equipment

such as dust mask, non-skid safety shoes, hard
hat, or hearing protection used for appropriate
conditions will reduce personal injuries.

c� J(*W*8$%'8"8$*8$"&8,7%#$,($"831%68#'(*%

$.*%#)"$4.%"#%"8%$.*%&22?/&#"$"&8%+*2&(*%
4&88*4$"83%$&%/&)*(%#&'(4*%,890&(%
+,$$*(V%/,4X=%/"4X"83%'/%&(%4,((V"83%$.*%
$&&71%Carrying power tools with your finger

on the switch or energizing power tools that
have the switch on invites accidents.

d� K*5&W*%,8V%,9]'#$"83%X*V%&(%)(*84.%

+*2&(*%$'(8"83%$.*%/&)*(%$&&7%&81%%A wrench

or a key left attached to a rotating part of the
power tool may result in personal injury.

e� U&%8&$%&W*((*,4.1%Y**/%/(&/*(%

2&&$"83%,89%+,7,84*%,$%,77%$"5*#1 This

enables better control of the power
tool in unexpected situations.

f� U(*##%/(&/*(7V1%U&%8&$%)*,(%7&&#*%47&$."83%

&(%]*)*7(V1%Y**/%V&'(%.,"(=%47&$."83%
,89%37&W*#%,),V%2(&5%5&W"83%/,($#1%%

Loose clothes, jewelry or long hair
can be caught in moving parts.

g� L2%9*W"4*#%,(*%/(&W"9*9%2&(%$.*%4&88*4$"&8%

&2%9'#$%*Z$(,4$"&8%,89%4&77*4$"&8%
2,4"7"$"*#=%*8#'(*%$.*#*%,(*%4&88*4$*9%
,89%/(&/*(7V%'#*91%%Use of dust collection

can reduce dust-related hazards.

h� U&%8&$%7*$%2,5"7",("$V%3,"8*9%2(&5%2(*<'*8$%

'#*%&2%$&&7#%,77&)%V&'%$&%+*4&5*%
4&5/7,4*8$%,89%"38&(*%$&&7%#,2*$V%
/("84"/7*#1%%A careless action can cause

severe injury within a fraction of a second.

i� Only use safety equipment that has been

approved by an appropriate standards agency�
Unapproved safety equipment may not provide
adequate protection� Eye protection must be
ANSI-approved and breathing protection
must be NIOSH-approved for the
specific hazards in the work area�

j� Do not lay the tool down until it has come to

a complete stop� Moving parts can grab the
surface and pull the tool out of your control�

k� When using a handheld power tool,

maintain a firm grip on the tool with
both hands to resist starting torque�

l� Do not leave the tool unattended when the

Battery Pack is connected� Turn off the tool,
and remove the Battery Pack before leaving�

m� This product is not a toy�

Keep it out of reach of children�

n� 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�

o� 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�

4� J&)*(%$&&7%'#*%,89%4,(*

a� U&%8&$%2&(4*%$.*%/&)*(%$&&71%P#*%$.*%4&((*4$%

/&)*(%$&&7%2&(%V&'(%,//7"4,$"&81%%The correct
power tool will do the job better and safer
at the rate for which it was designed.

b� U&%8&$%'#*%$.*%/&)*(%$&&7%"2%$.*%#)"$4.%

9&*#%8&$%$'(8%"$%&8%,89%&221%%Any power

tool that cannot be controlled with the switch
is dangerous and must be repaired.

c� U"#4&88*4$%$.*%/7'3%2(&5%$.*%/&)*(%

#&'(4*%,890&(%(*5&W*%$.*%+,$$*(V%/,4X=%
"2%9*$,4.,+7*=%2(&5%$.*%/&)*(%$&&7%+*2&(*%
5,X"83%,8V%,9]'#$5*8$#=%4.,83"83%
,44*##&("*#=%&(%#$&("83%/&)*(%$&&7#1%%

Such preventive safety measures reduce the
risk of starting the power tool accidentally.

d� E$&(*%"97*%/&)*(%$&&7#%&'$%&2%$.*%(*,4.%&2%

4."79(*8%,89%9&%8&$%,77&)%/*(#&8#%'82,5"7",(%
)"$.%$.*%/&)*(%$&&7%&(%$.*#*%"8#$('4$"&8#%
$&%&/*(,$*%$.*%/&)*(%$&&71%%Power tools are

dangerous in the hands of untrained users.

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e� N,"8$,"8%/&)*(%$&&7#%,89%,44*##&("*#1%

O.*4X%2&(%5"#,7"385*8$%&(%+"89"83%&2%
5&W"83%/,($#=%+(*,X,3*%&2%/,($#%,89%,8V%
&$.*(%4&89"$"&8%$.,$%5,V%,22*4$%$.*%/&)*(%
$&&7^#%&/*(,$"&81%L2%9,5,3*9=%.,W*%$.*%/&)*(%

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$&&7%(*/,"(*9%+*2&(*%'#*1%%Many accidents

are caused by poorly maintained power tools.

f� Y**/%4'$$"83%$&&7#%#.,(/%,89%47*,81%%Properly

maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.

g� P#*%$.*%/&)*(%$&&7=%,44*##&("*#%,89%$&&7%+"$#%

*$41%"8%,44&(9,84*%)"$.%$.*#*%"8#$('4$"&8#=%
$,X"83%"8$&%,44&'8$%$.*%)&(X"83%4&89"$"&8#%
,89%$.*%)&(X%$&%+*%/*(2&(5*91%%Use of the

power tool for operations different from those
intended could result in a hazardous situation.

h� Y**/%.,897*#%,89%3(,#/"83%#'(2,4*#%

9(V=%47*,8%,89%2(**%2(&5%&"7%,89%3(*,#*1%%

Slippery handles and grasping surfaces
do not allow for safe handling and control
of the tool in unexpected situations.

5� E*(W"4*

a� _,W*%V&'(%/&)*(%$&&7%#*(W"4*9%+V%,%

<',7"2"*9%(*/,"(%/*(#&8%'#"83%&87V%"9*8$"4,7%
(*/7,4*5*8$%/,($#1%%This will ensure that

the safety of the power tool is maintained.

b� Maintain labels and nameplates on the tool�

These carry important safety information�
If unreadable or missing, contact
Harbor Freight Tools for a replacement�

6� S,$$*(V%$&&7%'#*%,89%4,(*

a� J(*W*8$%'8"8$*8$"&8,7%#$,($"831%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.

b� U"#4&88*4$%$.*%+,$$*(V%/,4X%2(&5%$.*%

/&)*(%$&&7%+*2&(*%5,X"83%,8V%,9]'#$5*8$#=%

4.,83"83%,44*##&("*#=%&(%#$&("83%/&)*(%
$&&71%Such preventive safety measures reduce

the risk of starting the power tool accidentally.

c� K*4.,(3*%&87V%)"$.%$.*%4.,(3*(%#/*4"2"*9%+V%

$.*%5,8'2,4$'(*(1%A charger that is suitable

for one type of battery pack may create a risk
of fire when used with another battery pack.

d� P#*%/&)*(%$&&7#%&87V%)"$.%#/*4"2"4,77V%

9*#"38,$*9%+,$$*(V%/,4X#1%Use of any other

battery packs may create a risk of injury and fire.

e� Q.*8%+,$$*(V%/,4X%"#%8&$%"8%'#*=%X**/%

"$%,),V%2(&5%&$.*(%5*$,7%&+]*4$#=%7"X*%
/,/*(%47"/#=%4&"8#=%X*V#=%8,"7#=%#4(*)#%
&(%&$.*(%#5,77%5*$,7%&+]*4$#=%$.,$%4,8%
5,X*%,%4&88*4$"&8%2(&5%&8*%$*(5"8,7%
$&%,8&$.*(1%Shorting the battery terminals

together may cause burns or a fire.

f� P89*(%,+'#"W*%4&89"$"&8#=%7"<'"9%5,V%+*%

*]*4$*9%2(&5%$.*%+,$$*(V`%,W&"9%4&8$,4$1%

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.

g� U&%8&$%'#*%,%+,$$*(V%/,4X%&(%/&)*(%$&&7%$.,$%

"#%9,5,3*9%&(%5&9"2"*91%Damaged or modified

batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.

h� U&%8&$%*Z/&#*%,%+,$$*(V%/,4X%&(%/&)*(%

$&&7%$&%2"(*%&(%*Z4*##"W*%$*5/*(,$'(*1%

Exposure to fire or temperature above
265°F may cause explosion.

i� ;&77&)%,77%4.,(3"83%"8#$('4$"&8#%,89%9&%

8&$%4.,(3*%$.*%+,$$*(V%/,4X%&(%/&)*(%$&&7%
&'$#"9*%&2%$.*%$*5/*(,$'(*%(,83*%#/*4"2"*9%
"8%$.*%"8#$('4$"&8#1%Charging improperly or at

temperatures outside of the specified range may
damage the battery and increase the risk of fire.

j� _,W*%#*(W"4"83%/*(2&(5*9%+V%,%<',7"2"*9%

(*/,"(%/*(#&8%'#"83%&87V%"9*8$"4,7%
(*/7,4*5*8$%/,($#1%This will ensure that

the safety of the product is maintained.

k� U&%8&$%5&9"2V%&(%,$$*5/$%$&%(*/,"(%$.*%/&)*(%

$&&7%&(%$.*%+,$$*(V%/,4X%*Z4*/$%,#%"89"4,$*9%
"8%$.*%"8#$('4$"&8#%2&(%'#*%,89%4,(*1

l� 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",77V%,W&"9%/7,4"83%$.*%O.,(3*(%&8%
4,(/*$#%,89%('3#`%$.*V%,(*%8&$%&87V%
27,55,+7*=%+'$%$.*V%,7#&%&+#$('4$%W*8$#%
'89*(%$.*%O.,(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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7� T"$."'5%S,$$*(V%E,2*$V%Q,(8"83#

TLG_LPN%SFGG6KL6E%EGIK6%
F%TFKR6%FNIPMG%I;%6M6KRH%FMU%%
QLTT%!6MG%;LK6%IK%6aJTIU6%
L;%NLEGK6FG6U-

a� Y**/%S,$$*(V%J,4X%9(V1

b� UI%MIG%UI%FMH%I;%G_6%;ITTIQLMR%

GI%G_6%SFGG6KH%JFOY­b% I/*8=
b% U(&/=
b% E.&($?4"(4'"$=
b% J'84$'(*=
b% L84"8*(,$*=%&(
b% 6Z/&#*%$&%$*5/*(,$'(*#%

3(*,$*(%$.,8%cABd;1

c� Charge Battery Pack only according

to its Charger’s instructions�

d� Inspect Battery Pack before every use;

do not use or charge if damaged�

8� E,2*$V%"8#$('4$"&8#%2&(%,77%&/*(,$"&8#

a� Q*,(%*,(%/(&$*4$&(#%).*8%L5/,4$%9("77"831%

Exposure to noise can cause hearing loss.

b� P#*%$.*%,'Z"7",(V%.,897*[#\1%Loss of

control can cause personal injury.

c� S(,4*%$.*%$&&7%/(&/*(7V%+*2&(*%'#*1%This

tool produces a high output torque and without
properly bracing the tool during operation, loss
of control may occur resulting in personal injury.

d� _&79%$.*%/&)*(%$&&7%+V%"8#'7,$*9%

3("//"83%#'(2,4*#=%).*8%/*(2&(5"83%,8%
&/*(,$"&8%).*(*%$.*%4'$$"83%,44*##&(V%&(%
2,#$*8*(#%5,V%4&8$,4$%."99*8%)"("83%&(%
"$#%&)8%4&(91%Cutting accessory contacting

a “live” wire may make exposed metal
parts of the power tool “live” and could
give the operator an electric shock.

e� Let bit cool before touching, changing

or adjusting it� Bits heat up dramatically
while in use, and can burn you�

f� If the drill bit jams, release the

Trigger immediately; drill torque
can cause injury or break bit�

9� E,2*$V%L8#$('4$"&8#%).*8%'#"83%7&83%9("77%+"$#

a� M*W*(%&/*(,$*%,$%."3.*(%#/**9%$.,8%$.*%

5,Z"5'5%#/**9%(,$"83%&2%$.*%9("77%+"$1%

At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting
the workpiece, resulting in personal injury.

b� F7),V#%#$,($%9("77"83%,$%7&)%#/**9%,89%)"$.%

$.*%+"$%$"/%"8%4&8$,4$%)"$.%$.*%)&(X/"*4*1%

At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting
the workpiece, resulting in personal injury.

c� F//7V%/(*##'(*%&87V%"8%9"(*4$%7"8*%)"$.%$.*%

+"$%,89%9&%8&$%,//7V%*Z4*##"W*%/(*##'(*1%%

Bits can bend causing breakage or loss
of control, resulting in personal injury.

10� E"7"4&#"#%E,2*$V%N*,#'(*#

Masonry drilling on materials such as
concrete (which contains crystalline silica)
can cause silicosis (a serious lung disease),
cancer and death� To reduce crystalline silica
exposures in the workplace and prevent
silicosis and silicosis-related deaths:

a� Conduct air monitoring to measure

worker exposures�

b� Use containment methods to control the hazard

and protect adjacent workers from exposure�

c� Practice good personal hygiene to avoid

unnecessary exposure to silica dust�

d� Wear washable or disposable protective

clothes at the work site� Shower and change
into clean clothes before leaving the work
site to prevent contamination of cars, homes
and other work areas� Avoid skin exposure�

e� Always wear a NIOSH approved respirator and

safety goggles� Ventilate the work area properly�

f� Provide periodic medical examinations

for all workers who may be
exposed to crystalline silica�

g� Post signs to warn workers about

the hazard and to inform them about
required protective equipment�

h� Provide workers with training that includes

information about health effects, work practices
and protective equipment for crystalline silica�

i� Report all cases of silicosis to State health

departments and to OSHA or the Mine
Safety and Health Administration (MSHA)�

11� !"+(,$"&8%E,2*$V

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:

a� 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�

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

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