Porter-Cable 844 User Manual

Instruction

manual

The Model and Serial No. plate is located on the main housing of the tool. Record these numbers in the spaces below and retain for future reference.

Model No. ______________________________________

Type ___________________________________________

Serial No. _______________________________________

IMPORTANT

Please make certain that the person who is to use this equipment carefully reads and understands these instructions before starting operations.

ESPAÑOL: PÁGINA 23 FRANÇAISE : PAGE 45

To learn more about Porter-Cable

visit our website at:

http://www.porter-cable.com

Part No. 908934 - 02-11-05

Cordless Circular Saw

MODEL 844 Circular Saw MODEL 8723 Battery Pack

MODEL 845 Circular Saw MODEL 8923 Battery Pack

MODEL 8924

Charger

Read and understand all warnings and operating instructions before using any tool or equipment. When using tools or equipment, basic safety precautions should always be followed to reduce the risk of personal injury. Improper operation, maintenance or modification of tools or equipment could result in serious injury and property damage. There are certain applications for which tools and equipment are designed. Porter-Cable strongly recommends that this product NOT be modified and/or used for any application other than for which it was designed.

If you have any questions relative to its application DO NOT use the product until you have written Porter-Cable and we have advised you.

Online contact form at www.porter-cable.com Postal Mail: Technical Service Manager

Porter-Cable Corporation

4825 Highway 45 North Jackson, TN 38305

Information regarding the safe and proper operation of this tool is available from the following sources:

Power Tool Institute 1300 Sumner Avenue, Cleveland, OH 44115-2851

www.powertoolinstitute.org

National Safety Council 1121 Spring Lake Drive, Itasca, IL 60143-3201

American National Standards Institute, 25 West 43rd Street, 4 floor, New York, NY 10036 www.ansi.org

ANSI 01.1Safety Requirements for Woodworking

Machines, and the U.S. Department of Labor regulations www.osha.gov

SAVE THESE INSTRUCTIONS!

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . .2

SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

GENERAL SAFETY RULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

ADDITIONAL SPECIFIC SAFETY RULES . . . . . . . . . . . . . . . . . . . . . . . .6

SAFETY INSTRUCTIONS FOR CHARGER AND BATTERIES . . . . . . . .9

BATTERY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

CARTON CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

ESPAÑOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

FRANÇAISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

SERVICE CENTER LOCATIONS . . . . . . . . . . . . . . . . . . . . . . .back cover

TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS

Some dust created by power sanding, sawing, grinding, drilling,

and other construction activities contains chemicals known (to the State of California) to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

● lead from lead-based paints

● crystalline silica from bricks and cement and other masonry products

● arsenic and chromium from chemically-treated lumber

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, always wear NIOSH/OSHA approved, properly fitting face mask or respirator when using such tools.

indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

indicates a potentially hazardous situation which, if not avoided,could result in death or serious injury.

indicates a potentially hazardous situation which, if not avoided,may result in minor or moderate injury.

used without the safety alert symbol indicates potentially hazardous situation which, if not avoided, may result in property damage.

CALIFORNIA PROPOSITION 65

It is important for you to read and understand this manual. The information it contains relates to protecting YOUR SAFETY and PREVENTING PROBLEMS. The symbols below are used to help you recognize this information.

SAFETY GUIDELINES - DEFINITIONS

Read all instructions. Failure to follow all

instructions listed below may result in electric shock, fire and/or serious injury. The term "power tool" in all of the warnings listed below refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

SAVE THESE INSTRUCTIONS

1) Work area safety

a) Keep work area clean and well lit. Cluttered or dark areas invite

accidents.

b) Do not operate power tools in explosive atmospheres, such as in the

presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.

c) Keep children and bystanders away while operating a power tool.

Distractions can cause you to lose control.

2) Electrical safety a) Power tool plugs must match the outlet. Never modify the plug in any

way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric

shock.

b) Avoid body contact with earthed or grounded surfaces such as

pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.

c) Do not expose power tools to rain or wet conditions. Water entering a

power tool will increase the risk of electric shock.

d) Do not abuse the cord. Never use the cord for carrying, pulling or

unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk

of electric shock.

e) When operating a power tool outdoors, use an extension cord

suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.

3) Personal safety a) Stay alert, watch what you are doing and use common sense when

operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of

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

b) Use safety equipment. Always wear eye protection. Safety equipment

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

c) Avoid accidental starting. Ensure the switch is in the off-position

before plugging in. Carrying power tools with your finger on the switch or plugging in power tools that have the switch on invites accidents.

GENERAL SAFETY RULES

d) Remove any adjusting key or wrench before turning the power tool

on. A wrench or a key left attached to a rotating part of the power tool

may result in personal injury.

e) Do not overreach. Keep proper footing and balance at all times. This

enables better control of the power tool in unexpected situations.

f) Dress properly. Do not wear loose clothing or jewelry. Keep your

hair, clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.

g) If devices are provided for the connection of dust extraction and

collection facilities, ensure these are connected and properly used.

Use of these devices can reduce dust-related hazards.

4) Power tool use and care a) Do not force the power tool. Use the correct power tool for your

application. The correct power tool will do the job better and safer at the

rate for which it was designed.

b) Do not use the power tool if the switch does not turn it on and off.

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

c) Disconnect the plug from the power source before making any

adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.

d) Store idle power tools out of the reach of children and do not allow

persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of

untrained users.

e) Maintain power tools. Check for misalignment or binding of moving

parts, breakage of parts and any other condition that may affect the power tools operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power

tools.

f) Keep cutting tools sharp and clean. Properly maintained cutting tools

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

g) Use the power tool, accessories and tool bits etc., in accordance

with these instructions and in the manner intended for the particular type of power tool, taking into account the working conditions and the work to be performed. Use of the power tool for

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

GENERAL SAFETY RULES

continued

5) Battery tool use and care

a) 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.

b) Use battery tools only with specifically designated battery packs.

Use of any other battery packs may create a risk of injury and fire.

c) 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.

d) Under abusive conditions, liquid may be ejected from the battery.

Avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, seek additional medical help. Liquid ejected

from the battery may cause irritation or burns.

e) Ensure the switch is in the off position before inserting battery pack.

Inserting the battery pack into power tools that have the switch on invites accidents.

6) Service a) Have your power tool serviced by a qualified repair person using only

identical replacement parts. This will ensure that the safety of the

power tool is maintained.

GENERAL SAFETY RULES

continued

ADDITIONAL SPECIFIC SAFETY RULES

Safety Instructions for All Saws

a) Keep hands away from cutting area and the blade. Keep your second

hand on auxiliary handle, or motor housing. If both hands are holding

the saw, they cannot be cut by the blade.

b) Do not reach underneath the workpiece. The guard cannot protect you

from the blade below the workpiece.

c) Adjust the cutting depth to the thickness of the workpiece. Less than a

full tooth of the blade teeth should be visible below the workpiece.

d) Never hold piece being cut in your hands or across your leg. Secure

the workpiece to a stable platform. It is important to support the work properly to minimize body exposure,blade binding, or loss of control.

e) Hold power tool by insulated gripping surfaces when performing an

operation where the cutting tool may contact hidden wiring or its own cord. Contact with a "live" wire will also make exposed metal parts of the

power tool "live" and shock the operator.

f) When ripping always use a rip fence or straight edge guide. This

improves the accuracy of cut and reduces the chance of blade binding.

SAVE THESE INSTRUCTIONS!

ADDITIONAL SPECIFIC SAFETY RULES

continued

SAVE THESE INSTRUCTIONS!

g) Always use blades with correct size and shape (diamond versus

round) of arbor holes. Blades that do not match the mounting hardware

of the saw will run eccentrically, causing loss of control.

h) Never use damaged or incorrect blade washers or bolt. The blade

washers and bolt were specially designed for your saw, for optimum performance and safety of operation.

Kickback Safety Instructions

Causes and Operator Prevention of Kickback: – Kickback is a sudden reaction to a pinched, bound or misaligned saw

blade, causing an uncontrolled saw to lift up and out of the workpiece toward the operator.

– When the blade is pinched or bound tightly by the kerf closing down, the

blade stalls and the motor reaction drives the unit rapidly back toward the operator.

– If the blade becomes twisted or misaligned in the cut, the teeth at the back

edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump back toward the operator.

Kickback is the result of saw misuse and/or incorrect operating procedures

or conditions and can be avoided by taking proper precautions as given below:

i) Maintain a firm grip with both hands on the saw and position your

arms to resist kickback forces. Position your body to either side of the blade, but not in line with the blade. Kickback could cause the saw to

jump backwards, but kickback forces can be controlled by the operator, if proper precautions are taken.

j) When blade is binding, or when interrupting a cut for any reason,

release the trigger and hold the saw motionless in the material until the blade comes to a complete stop. Never attempt to remove the saw from the work or pull the saw backward while the blade is in motion or kickback may occur. Investigate and take corrective actions to

eliminate the cause of blade binding.

k) When restarting a saw in the workpiece, centre the saw blade in the

kerf and check that saw teeth are not engaged into the material. If saw blade is binding, it may walk up or kickback from the workpiece as the saw is restarted.

l) Support large panels to minimize the risk of blade pinching and

kickback. Large panels tend to sag under their own weight. Supports must be placed under the panel on both sides, near the line of cut and near the edge of the panel.

m)Do not use dull or damaged blades. Unsharpened or improperly set

blades produce narrow kerf causing excessive friction, blade binding and kickback.

n) Blade depth and bevel adjusting locking levers must be tight and

secure before making cut. If blade adjustment shifts while cutting, it may cause binding and kickback.

o) Use extra caution when making a "plunge cut" into existing walls or

other blind areas. The protruding blade may cut objects that can cause kickback.

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