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INTRODUCTION 

2

TABLE OF CONTENTS 

I.

Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . 3-6
A. Important Safety Information  . . . . . . . . . . . . . . . 3-4
B. Safety and International Symbols  . . . . . . . . . . . . . 5
C. Know Your Unit  . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

II.

Assembly Instructions  . . . . . . . . . . . . . . . . . . . . . . . . 6
A. Installing Front Handle . . . . . . . . . . . . . . . . . . . . . . . . . 6

III. Operating Instructions  . . . . . . . . . . . . . . . . . . . . . . 7-8

A. To Turn Your Hedge Trimmer On  . . . . . . . . . . . . . 7
B. Extension Cord Retainer  . . . . . . . . . . . . . . . . . . . . 7
C. Using the Hedge Trimmer  . . . . . . . . . . . . . . . . . . . 8
D. To Trim a Hedge  . . . . . . . . . . . . . . . . . . . . . . . . . . 8

IV. Maintenance and Repair Instructions  . . . . . . . . . . 9-12

A. General Recommendations  . . . . . . . . . . . . . . . . . . 9
B. Before Each Use Check for 

Damaged/Worn Parts  . . . . . . . . . . . . . . . . . . . . . . 9

C. After Each Use Clean Unit and Labels  . . . . . . . . . 9
D. Sharpening the Cutting Blade  . . . . . . . . . . . . . . . . 9
E. Blade Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 9
F. Blade Replacement   . . . . . . . . . . . . . . . . . . . . . . 10
G. Servicing Double Insulated Units . . . . . . . . . . . . . 12
H. Cleaning the Unit   . . . . . . . . . . . . . . . . . . . . . . . . 12
I. Inspect Extension Cords  . . . . . . . . . . . . . . . . . . . 12
J. Storage   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

V.

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

VI. Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . 13

VII. Warranty  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

CONTENTS OF CARTON 

Hedge Trimmer, Either Model HT816r, 
HT818r or HT822r

Front Handle with Hardware

Operator’s Manual

Owner’s Registration Card

Examine all parts to make certain that nothing is missing
and no breakage has occurred during shipping.
Damaged or missing parts must be replaced before
using this unit.

THANK YOU

Thank you for buying this quality product. This modern
outdoor power tool will provide many hours of useful
service. You will find it to be a great labor-saving device.
This operator’s manual provides you 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 AND
SPECIFICATIONS 

All information, illustrations and specifications in this
manual are based on the latest product information
available at the time of printing. We reserve the right to
make changes at any time without notice.

Copyright

©

1999 Ryobi Outdoor Products, Inc. 

All Rights Reserved.

SERVICE INFORMATION 

Service on this unit both within and after the warranty
period should be performed only by an authorized and
approved service dealer. 
Dial: 

1-800-345-8746

or 

www.ryobi.com

on the world wide

web for authorized service dealers in the United States

Or

• 1-800-265-6778

in Canada to obtain the listing of the

authorized service dealer nearest you.

to obtain the listing of the authorized service dealer
nearest you.

DO NOT RETURN THE UNIT TO THE RETAILER.
NOTE: PROOF OF PURCHASE WILL BE REQUIRED

FOR WARRANTY SERVICE.

Make sure this manual is carefully read and understood
before starting or operating this equipment. 

THIS PRODUCT IS COVERED BY ONE OR MORE 
US PATENTS, OTHER PATENTS PENDING. 

WARNING:

The operation of any hedge trimmer can result in foreign objects being thrown 

in the eyes. This can lead to severe eye damage. Before commencing power tool operation, always 
wear safety glasses or goggles that are marked as meeting ANSI Z87.1 standards, and a full face 
shield when needed. 

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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