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RULES FOR SAFE OPERATION

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• To reduce risk of damage to charger body and cord,

pull by the charger body, rather than cord, when 
disconnecting the charger. 

• Make sure charger cord is located so that it will not be

stepped on, tripped over, or otherwise subjected to
damage or stress.

• Do not operate charger with a damaged cord or plug.

If damaged, replaced charger immediately.

• Do not operate charger if it has received a sharp blow,

been dropped, or otherwise damaged in any way. If
the charger case is damaged, replace the charger.

• Do not disassemble charger. The charger is not

serviceable; disassembly may result in a risk of electric
shock or fire.

• To reduce risk of electric shock, unplug the charger

from outlet before attempting any maintenance or
cleaning. 

• Do not use charger outdoors. 

• Use only the following type and size battery: Ryobi

part #182391, 12 volt DC, sealed lead-acid battery.

• Do not dispose of batteries in a fire. The cell may

explode. Batteries should be recycled, consult your
local waste authority for information regarding
available recycling and/or disposal options

• Do not charge battery in rain or in wet locations.

• Exercise care when handling batteries in order not to 

short the battery with conducting materials such as
rings, bracelets, and keys. The battery or conductor
may overheat and cause burns.

• Charge the battery in a location where the temperature

is more than 50˚F (10˚C) but less than 100˚F (38˚C).

• Do not open or mutilate the battery. Released

electrolyte is corrosive and may cause damage to the
eyes or skin. It may be toxic if swallowed.

WHILE OPERATING

• To avoid accidental starting, never carry your 

unit with your finger on the trigger.

• Wear safety glasses or goggles that are marked as

meeting ANSI Z87.1-1989 standards, and ear/hearing
protection when operating this unit. Wear a face or
dust mask if the operation is dusty. Long sleeve shirts
are recommended.

• Stay Alert. Watch what you are doing. Use common

sense.

• Wear heavy, long pants, boots and gloves. Do not

wear short pants, sandals or go barefoot.

• Dress Properly. Do not wear loose clothing or jewelry.

They can be caught in moving parts. Secure hair
above shoulder level.

• Adjust the D-handle to your size to provide the best

grip.

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

• Use the right tool. Only use this tool for the purpose

intended.

• Do not overreach. Always keep proper footing and

balance.

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

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

• Always hold the unit with both hands when operating.

Keep a firm grip on both the battery housing grip and
D-handle.

• Use only genuine Ryobi replacement parts when

servicing this unit. These parts are available from your
authorized service dealer. 

• Do not use parts, accessories or attachments not

authorized by Ryobi for this unit. Doing so could lead
to serious injury to the user, or damage to the unit, and
void your warranty.

• The trimmer is designed only for cutting grass, light

weeds and decorative trimming. Do not use trimmer 
as an edger.

• Be sure the cutting attachment is not in contact with

anything before starting the unit.

• 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.

• Release the trigger, ensure the lock-off button resets

and allow the motor to stop for maintenance or repair.

• Keep hands, face, and feet at a distance from all

moving parts. Do not touch or try to stop the cutting
attachment when it is rotating.

• Always stop the motor when cutting is delayed or

when walking from one cutting location to another.

• The cutting attachment shield must always be in place

while operating the unit. Do not operate unit without
trimming line extended, and the proper line installed.
Do not extend the trimming line beyond the length of
the shield.

• Keep unit clean of vegetation and other materials.

They may become lodged between the cutting
attachment and shield.

OTHER SAFETY WARNINGS

• Store the unit inside in a dry place, either locked up or

up high to prevent unauthorized use or damage. 
Keep out of the reach of children.

• Never douse or squirt the unit with water or any other

liquid. Keep handles dry, clean and free from debris.
Clean after each use, see Cleaning and Storage
instructions.

• Be sure to secure the unit while transporting.

• Keep these instructions. Refer to them often and use

them to instruct other users. If you loan someone this
unit, also loan them these instructions.

SAVE THESE INSTRUCTIONS

Summary of Contents for 155r

Page 1: ...155r 12 Volt Battery 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: ...TAILER 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 INTRODUCTION TABLE OF CONTENTS 2 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 Ass...

Page 3: ...s properly attached and positioned as recommended Failure to do so can result in personal injury to the operator and bystanders as well as damage to the unit Avoid dangerous environments Never operate your unit in damp or wet conditions Moisture is a shock hazard Do not use the unit in the rain Do not handle the unit with wet hands Use only 0 080 in 2 03 mm diameter genuine Ryobi replacement line ...

Page 4: ...provide the best grip Use the unit only in daylight or good artificial light Use the right tool Only use this tool for the purpose intended Do not overreach Always keep proper footing and balance Do not force the unit It will do the job better and with less likelihood of a risk of injury at the rate for which it was designed Always hold the unit with both hands when operating Keep a firm grip on b...

Page 5: ...EARING PROTECTION WARNING Thrown objects and loud noise can cause severe eye injury and hearing loss Wear eye protection meeting ANSI Z87 1 1989 standards and ear protection when operating this unit KEEP BYSTANDERS AWAY WARNING Keep all bystanders especially children and pets at least 50 feet 15 m from the operating area THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY WARNING Do not ope...

Page 6: ...ock Off Button Bump Head Cutting Attachment Motor Wire Housing Tube Hand Grip Overload Protection Switch Battery Housing APPLICATION Use the Trimmer for Cutting grass and light weeds decorative trimming around trees fences etc KNOW YOUR UNIT Cutting Attachment Shield Battery Door Air Vents ...

Page 7: ...UNTING THE CHARGING STATION NOTE Mount the charging unit and allow the unit to charge for at least 36 hours prior to first use This unit may stay on the charging station continuously without overcharging Place the charging station where the unit is intended to be stored This should be a cool dry and well ventilated place where the unit can be locked up and out of the reach of children The unit sho...

Page 8: ...the unit See Replacing the Charger if not page 14 NOTE The battery will heat up while the unit is being charged Be sure the air vents on the battery housing are kept cleared for proper ventilation Fig 4 Charging Tips for Maximum Performance Store and charge the unit where temperatures are between 50 F 10 C and 100 F 38 C Storing the unit or batteries above 100 F 38 C will reduce battery life Stora...

Page 9: ...o bend over Fig 8 Fig 8 2 Depress and hold trigger 3 Release the lock off button TO STOP UNIT Release the trigger to stop the trimmer TO START UNIT WARNING To prevent serious personal injury ensure the lock off button resets each time the trigger is released 1 Press and hold the lock off button in Fig 6 This allows the trigger to operate Fig 6 Lock Off Button Fig 7 Overload Protection Switch Trigg...

Page 10: ...tting shorter lengths produces best results Trim only when grass and weeds are dry The life of your cutting line is dependent upon following the previous trimming techniques what is being cut and where the cutting is being done For example the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree Some line breakage will occur from Entanglement with fore...

Page 11: ...ene Wipe off the unit with a clean dry soft cloth Keep air vents free from debris at all times LINE INSTALLATION Always use genuine Ryobi 0 080 in 2 03 mm replacement line Using line other than specified may cause the unit to overheat or fail WARNING Never use metal reinforced line wire or rope etc These can break off and become a dangerous projectile There are two methods to replace the trimmer l...

Page 12: ... clean the inner surface of the outer spool Fig 11 Pg 11 5 Insert the end of the line on the prewound reel through the eyelet in the outer spool Fig 15 6 Place inner reel and spring inside the outer spool NOTE The spring must be assembled on the inner reel before reassembling the bump head 7 Hold the inner reel in place grasp the line end and pull firmly to release the line from the holding slot i...

Page 13: ...wing the battery housing door closed until the two latches snap into place For Best Performance When reinstalling the battery Check battery terminals for corrosion and clean if necessary Clean terminals using a dry scrubbing pad and wipe clean with a dry cloth Never use liquids to clean terminals Check battery casing for signs of damage and replace if needed NOTE If you clean or replace the batter...

Page 14: ... barrel connector or cord become damaged or if the barrel connector is not connecting to the unit properly CAUTION Only use the type of charger specified for this unit Any other type may cause damage to the unit batteries and possible injury Your trimmer requires a Ryobi 182534 12V charger and 180295 charging station The charging instructions refer only to these parts NOTE If you are using the opt...

Page 15: ...not charged Charge battery See Charging the Unit page 8 Overload protection switch has popped Reset overload protection switch MOTOR OPERATES SLOWLY OR WILL NOT OPERATE BATTERY WILL NOT CHARGE C A U S E A C T I O N No power to charger or battery Check charger and charging station See Charging the Unit page 8 Battery has failed Replace battery See Battery Pack Replacement page 13 CUTTING ATTACHMENT...

Page 16: ...able 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 Product including any defective part must be returned to an authorized service dealer within the warranty period The expense of delivering the RYOBI Product to the dealer for warranty work and the expense of returning it ...

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