background image

WARNING:

When servicing, use only

identical Ryobi replacement parts. Use of 
any other parts may create a hazard or cause
product damage. 

WARNING

: To avoid serious personal 

injury, be sure the unit is off and unplugged
before cleaning or performing any
maintenance on it.

GENERAL RECOMMENDATIONS 

The warranty on this unit does not cover items that have
been subjected to operator abuse or negligence. To
receive full value from the warranty, the operator must
maintain the unit as instructed in this operator’s manual.

BEFORE EACH USE CHECK FOR
DAMAGED/WORN PARTS

• Check for damaged parts. Before further use of the

unit, a guard or other part that is damaged should be
carefully checked to determine that it will operate
properly and perform its intended function. Check for
alignment of moving parts, binding of moving parts,
breakage of parts, mounting, and any other condition
that may effect the units operation. A guard or other
part that is damaged should be properly repaired or
replaced by an authorized service dealer unless
indicated elsewhere in this manual.

AFTER EACH USE CLEAN UNIT 
AND LABELS

• Clean the unit using a damp cloth with a mild

detergent.

NOTE:

Do not use any strong detergents on the plastic
housing or the handle. They can be damaged by
certain household cleaners that contain aromatic
oils such as pine and lemon, and by solvents
such as kerosene.

WARNING:

Do not at any time let brake 

fluids, gasoline, petroleum-based products,
penetrating oils, etc. come in contact 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.

SHARPENING THE CUTTER BLADE

WARNING:

During these procedures, you will

need to connect the unit to power. To avoid
serious personal injury, be sure to disconnect
the power when stated.

1. Allow your hedge trimmer to come to a stop with the

cutter blade and guard positioned as shown in
Figure 8. This will allow clearance for the file
between cutter teeth and guard teeth.

2. Disconnect Hedge Trimmer from power supply.

MAINTENANCE AND REPAIR INSTRUCTIONS

9

Fig. 9

Fig. 8

BLADE LUBRICATION

Disconnect hedge trimmer from power supply.

For easier operation and longer blade life, lubricate the
hedge trimmer blade before and after each use. Before
lubricating, be sure the switch is in the off position and
the tool is disconnected from the power supply. Apply
light machine oil along the edge of the top strap as
shown in figure 9.

CAUTION: 

Some spray-on lubricants contain

solvents and will cause some types of grease
to break-down. To prevent damage to the
unit, only use a quality machine oil.

Your trimmer should be stopped, disconnected, and
oiled occasionally during use.

3. Clamp the blade assembly in a vise and file the

exposed cutting surface of each blade tooth with an
8 inch fine round file, 1/4 in. or 7/32 in. diameter. Be
sure to retain the original angle of tooth when filing.

4. Remove the hedge trimmer from the vise, restart it,

and stop it so that the unsharpened edges of the
blade teeth are exposed.

5. Disconnect the tool and repeat the sharpening 

procedure as described above.

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...

Reviews: