Ryobi HT816r, HT818r, HT822r Operator'S Manual Download Page 4

RULES FOR SAFE OPERATION

4

BEFORE OPERATING

• Read the instructions carefully. Be familiar with the

controls and proper use of the unit.

• Children and teens under the age of 15 must not use

the unit, except for teens guided by an adult.

• Before each use, thoroughly inspect your unit for 

loose or damaged parts. Do not use until adjustments
or repairs are made.

• All guards and safety attachments must be installed

properly before operating the unit.

• Use the unit only in daylight or good artificial light.

• Keep all bystanders, especially children and pets, at

least 50 feet (15 m) away from the unit while operating.

• To reduce the risk of electrical shock, this unit has a

polarized plug (one blade is wider than the other) and
will require the use of a polarized extension cord. This
unit plug will fit into a polarized extension cord only
one way. If the plug does not fit fully into the extension
cord, reverse the plug. If the plug still does not fit,
obtain a correct polarized extension cord. A polarized
extension cord will require the use of a polarized wall
outlet. This plug will fit into a polarized wall outlet only
one way. If the plug does not fit fully into the wall
outlet, reverse the plug. If the plug still does not fit,
contact a qualified electrician to install the proper wall
outlet. Do not change the unit plug, extension cord
receptacle, or extension cord plug in any way.

• Ground Fault Circuit Interrupter (GFCI) protection

should be provided on the circuit(s) or outlet(s) to be
used for this unit. Receptacles are available having
built-in GFCI protection and may be used for this
measure of safety.

EXTENSION CORDS: 

Make sure your extension cord

is in good condition. When using an extension cord,
be sure to use a cord that is heavy enough to carry the
current that your unit will draw. An undersized
extension cord will cause a drop in line voltage
resulting in loss of power and overheating. The table
shows the correct size to use depending on the cord
length and nameplate amperage rating. If in doubt, use
the next heavier size line gauge. The smaller the gauge
number, the heavier the cord. To reduce the possibility
of disconnection of the unit from the extension cord
during operation, see Fig. 5, page 7.

• A nameplate on your unit indicates what voltage it

uses. Never connect the unit to an AC voltage that
differs from this voltage.

FOR SAFE OPERATION

• Avoid unintentional starting. Do not carry plugged-in

unit with your finger on the switch. Be sure switch is
off when plugging in.

• Always remain alert. Use common sense. To prevent

injury to yourself and others, do not operate this unit if
you are fatigued.

• Do not operate the unit while under the influence of

drugs, alcohol or medication.

• Wear safety glasses or goggles that are marked as

meeting ANSI Z87.1 standards, and ear/hearing
protection when operating this unit. Wear a face or
dust mask if the operation is dusty.

• Do not overreach or use the unit from unstable

surfaces such as ladders, trees, steep slopes,
rooftops, etc. Keep proper footing and balance at all
times.

• Wear heavy, long pants, boots, gloves and a long 

sleeve shirt. Do not wear loose clothing, jewelry, short
pants, sandals or go barefoot. Secure hair above
shoulder level.

• Always stop the motor when cutting is delayed or

when walking from one cutting location to another.

• Keep unit clean of vegetation and other materials.

They may become lodged in the cutting blades.

• When operating the hedge trimmer, always hold the

unit with both hands. Keep a firm grip on both the
housing grip and front handle. Never grip the unit by
the guard or use the guard as a handle.

• Do not force unit. It will do the job better and with less

likelihood of injury at a rate for which it was designed.

• Use only genuine Ryobi replacement parts and 

accessories for this unit. These are available from 
your authorized service dealer. Use of any non Ryobi
parts or accessories could lead to serious injury to the
user, or damage to the unit, and void your warranty.

• This unit is provided with double-insulation. Use only

identical replacement parts. See instructions for
Servicing of Double-Insulated Units.

• If you strike or become entangled with a foreign

object, stop the unit immediately and check for
damage. Do not operate before repairing damage. Do
not operate the unit with loose or damaged parts.

• Maintain the unit with care. 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. Always use a clean cloth
when cleaning. Never use brake fluid, gasoline,
petroleum-based products, or any strong solvents to
clean your tool.

MINIMUM WIRE SIZE FOR EXTENSION CORDS

FOR 120 VOLT APPLIANCES

Cord length (ft)

25

50

100

150

Amperage Rating

Wire size (AWG)

1 to 10 amps

18

16

14

12

10 to 12 amps

16

16

14

12

12 to 16 amps

14

12

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Summary of Contents for HT816r, HT818r, HT822r

Page 1: ...HT816r HT818r HT822r Electric Hedge Trimmer OPERATOR S MANUAL FOR QUESTIONS CALL 1 800 345 8746 in U S or 1 800 265 6778 in CANADA www ryobi com IMPORTANT MANUAL DO NOT THROW AWAY...

Page 2: ...with easy to understand operating instructions Read the whole manual and follow all the instructions to keep your new outdoor power tool in top operating condition PRODUCT REFERENCES ILLUSTRATIONS AN...

Page 3: ...Trimmer plugged in Unplug from outlet when not in use changing attachments blades or before servicing Avoid dangerous environments Never operate your unit in damp or wet conditions Moisture is a shoc...

Page 4: ...age FOR SAFE OPERATION Avoid unintentional starting Do not carry plugged in unit with your finger on the switch Be sure switch is off when plugging in Always remain alert Use common sense To prevent i...

Page 5: ...specially children and pets at least 50 feet 15 m from the operating area KEEP HANDS AWAY FROM BLADES WARNING Moving blades can cause severe injury Do not touch the blades when starting or while opera...

Page 6: ...shes with a branch diameter of up to 3 8 inch Fig 2 KNOW YOUR UNIT Screw Screw Lock Nut Handle Slot Blade Guard Front Handle Rear Handle Ears Rear Handle Lock Nut Front Handle Blade Guard Cutting Blad...

Page 7: ...Depress and hold the switch trigger 3 Release the lock off button 4 Pull lock on tab back with your thumb and hold 5 Release switch trigger then release lock on tab To Release the Lock On 1 Depress th...

Page 8: ...reduce your pace TO TRIM A HEDGE WARNING Clear the area to be cut before each use Remove all objects such as cords lights wire or string which can become entangled in the cutting blade 1 Use hedge tr...

Page 9: ...act with plastic parts They contain chemicals that can damage weaken or destroy plastic Wipe off the unit with a clean dry soft cloth Keep handles dry clean and free from oil and grease at all times S...

Page 10: ...ve blade cover screw Fig 10 2 Remove blade cover To remove push blade cover forward and lift from hedge trimmer 3 Remove blade screws Fig 11 NOTE A flat blade or T20 Torx bit screwdriver is required t...

Page 11: ...slots in housing then slide blade cover back into its correct position Fig 15 11 Tighten blade cover screw securely WARNING Make sure blade cover is replaced before connecting your hedge trimmer to po...

Page 12: ...a double insulated unit must be identical to the parts they replace Refer any repair to an authorized service dealer A double insulated unit is marked with the words DOUBLE INSULATION or DOUBLE INSUL...

Page 13: ...el HT816r 1 180183 REPLACEMENT BLADE Model HT818r 1 180184 REPLACEMENT BLADE Model HT822r 2 180185 BLADE PLATE 3 180398 BLADE SCREW 4 180049 FRONT WRAP AROUND HANDLE 5 180048 FRONT HANDLE SCREW 6 1800...

Page 14: ...found in the reasonable judgement of RYOBI to be defective in material or workmanship will be repaired or replaced by an authorized RYOBI service dealer without charge for parts and labor The RYOBI P...

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