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For technical questions, please call 1-888-866-5797.

Item 64754 64756 
        

Sa

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Opera

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Maintenance

Setup

7� 

Lithium Battery Safety Warnings

LitHiuM BatterieS StOre 
a LarGe aMOunt OF enerGy anD  
WiLL Vent Fire Or eXpLODe 
iF MiStreateD:

a� 

Keep Battery pack dry.

b� 

DO nOt DO any OF tHe FOLLOWinG 
tO tHe Battery pacK:
•  Open,
•  Drop,
•  Short-circuit,
•  puncture,
•  incinerate, or
•  expose to temperatures 

greater than 265°F.

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� 

Safety instructions for all operations

a� 

Wear ear protectors when impact drilling. 

Exposure to noise can cause hearing loss.

b� 

use the auxiliary handle(s). 

Loss of 

control can cause personal injury.

c� 

Brace the tool properly before use. 

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� 

Hold the power tool by insulated 
gripping surfaces, when performing an 
operation where the cutting accessory or 
fasteners may contact hidden wiring or 
its own cord. 

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� 

Safety instructions when using long drill bits

a� 

never operate at higher speed than the 
maximum speed rating of the drill bit. 

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

b� 

always start drilling at low speed and with 
the bit tip in contact with the workpiece. 

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

c� 

apply pressure only in direct line with the 
bit and do not apply excessive pressure.  

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

10� 

Silicosis Safety Measures

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� 

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:
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�

Summary of Contents for Hypermax Lithium 1791C-B1

Page 1: ...rence 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 manua...

Page 2: ...ovided with this power tool Failure to follow all instructions listed below may result in electric shock fire and or serious injury Save all warnings and instructions for future reference The term power tool in the warnings refers to your mains operated corded power tool or battery operated cordless power tool 1 Work area safety a Keep work area clean and well lit Cluttered or dark areas invite ac...

Page 3: ...ure these are connected and properly used Use of dust collection can reduce dust related hazards h Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles 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 equ...

Page 4: ... with specifically designated battery packs Use of any other battery packs may create a risk of injury and fire e 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 f under abusive conditio...

Page 5: ...kpiece resulting in personal injury c apply pressure only in direct line with the bit and do not apply excessive pressure Bits can bend causing breakage or loss of control resulting in personal injury 10 Silicosis Safety Measures 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 ...

Page 6: ...you are in doubt as to whether the outlet is properly grounded Do not modify the power cord plug provided with the charger Do not use the charger if the power cord or plug is damaged if damaged have it repaired by a service facility before use if the plug will not fit the outlet have a proper outlet installed by a qualified electrician extension cords note Extension cords must not be used with thi...

Page 7: ...00 0 27 200 Chuck Size 1 2 1 2 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 note For additional information regarding the parts listed in the following pages refer to Parts List and Diagram on page 12 Functions Direction Switch Work Light Battery trigger chuck ...

Page 8: ...l and or break nOtice use sharp bits Dull bent or damaged bits will cause stress on the tool and or break 1 While holding the ring behind the collar of the Chuck with one hand rotate the collar of the Chuck counterclockwise until the jaws of the drill are opened enough for bit to fit 2 Use a bit designed for the workpiece type Place the desired drill screwdriver bolt or nut bit into the drill betw...

Page 9: ...sert a fully charged Battery Pack making sure that it clicks into place securely 2 Set Direction Switch Forward Push Switch in on right side arrow pointing forward for clockwise rotation reverse Push Switch in on left side arrow pointing backward for counter clockwise rotation trigger Lock Push Switch to the center to lock the Trigger cautiOn Set Direction Switch to center trigger Lock position du...

Page 10: ...g for cutting without overheating the bit 3 When drilling large holes in metal surfaces use a small drill bit at first Then finish with a larger drill bit Be sure to lubricate the bit with oil to improve the drilling action and help increase bit life Drilling in Masonry Model 1792c B1 only 1 Use carbide or specialty bits for masonry drilling and set mode to Hammer Drilling 2 When drilling in walls...

Page 11: ... start 1 Battery Pack not properly connected 2 Battery Pack not properly charged 3 Battery Pack burnt out 4 Internal damage or wear Carbon brushes or Trigger for example 1 Remove Battery Pack make sure there are no obstructions reinsert the Battery Pack according to its shape it should only fit one way and press firmly until the Battery Pack locks in place 2 Make sure Charger is connected and oper...

Page 12: ...r End Cap 1 7 Motor Gear 1 8 Screw 3 9 Motor 1 10 Push Rod 1 11 Selector Button 1 12 Selector Button Spring 1 13 Spring 1 14 Right Housing 1 15 Protective Plate Bracket Assembly 1 16 Switch Assembly 1 17 Battery Pack Assembly 1 18 Transparent Cover 1 19 Belt Clip 1 20 Left Housing 1 21 Charger not shown 1 parts List and Diagram pLeaSe reaD tHe FOLLOWinG careFuLLy THE MANUFACTURER AND OR DISTRIBUTO...

Page 13: ...Page 13 For technical questions please call 1 888 866 5797 Item 64754 64756 SaFety OperatiOn Maintenance Setup assembly Diagram for 1791c B1 ...

Page 14: ...1 part Description Qty 6 29 Planet Carrier 1 6 30 Planet Gear 5 6 31 Spacer 1 6 32 Rear Shell Gear Ring 1 6 33 Gearbox Rear Shell 1 6 34 Screw 4 6 35 Planet Gear Carrier 1 6 36 Planet Gear 5 6 37 Toggle Gear Ring 1 6 38 Toggle Bracket 1 6 39 Inner Gear Ring Side Pin 4 6 40 Planet Gear Carrier 1 6 41 Planet Gear 3 6 42 Gear Ring 1 6 43 Large Spacer 1 6 44 Motor End Cap 1 6 45 Indicator Ring Insert ...

Page 15: ...Page 15 For technical questions please call 1 888 866 5797 Item 64754 64756 SaFety OperatiOn Maintenance Setup assembly Diagram for 1792c B1 ...

Page 16: ...w 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 an...

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