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SERVICE

Tool  service  must  be  performed  only  by  qualified
repair personnel. 

Service or maintenance performed by 

unqualified personnel may result in a risk of injury.

When servicing a tool, use only identical replacement 
parts. Follow instructions in the Maintenance section 
of this manual.

 Use of unauthorized parts or failure to

follow  Maintenance  Instructions  may  create  a  risk  of 
shock or injury.

GENERAL SAFETY RULES

SPECIFIC SAFETY RULES

Hold  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 make exposed metal parts of the cutting 
tool “live” and shock the operator.

Know your power tool. Read operator’s manual care-
fully.  Learn  its  applications  and  limitations,  as  well 
as the specific potential hazards related to this tool. 

Following this rule will reduce the risk of electric shock, 
fire, or serious injury.

Always  wear  safety  glasses.  Everyday  eyeglasses 
have  only  impact-resistant  lenses;  they  are  NOT 
safety glasses. 

Following this rule will reduce the risk 

of serious personal injury.

Protect your lungs. Wear a face or dust mask if the 
operation is dusty. 

Following this rule will reduce the 

risk of serious personal injury.

Protect your hearing. Wear hearing protection during 
extended periods of operation. 

Following this rule will 

reduce the risk of serious personal injury.

Inspect tool cords periodically and, if damaged, have 
repaired at your nearest Authorized Service Center. 
Constantly stay aware of cord location. 

Following this 

rule will reduce the risk of electric shock or fire.

Check  damaged  parts.  Before  further  use  of  the 
tool, 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 conditions 
that may affect its operation. A guard or other part that 
is damaged should be properly repaired or replaced 
by an authorized service center. 

Following this rule will 

reduce the risk of shock, fire, or serious injury.

Make sure your extension cord is in good condition. 
When using an extension cord, be sure to use one 
heavy enough to carry the current your product will 
draw.  A  wire  gauge  size  (A.W.G.)  of  at  least  14  is 
recommended for an extension cord 50 feet or less 
in  length.  A  cord  exceeding  100  feet  is  not  recom-
mended. If in doubt, use the next heavier gauge. The 
smaller the gauge number, the heavier the cord. 

An 

undersized cord will cause a drop in line voltage resulting 
in loss of power and overheating.

Inspect for and remove all nails from lumber before 
using this tool. 

Following this rule will reduce the risk of 

serious personal injury.

Save these instructions. 

Refer to them frequently and 

use them to instruct others who may use this tool. If you 
loan  someone  this  tool,  loan  them  these  instructions 
also.

WARNING:

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals 
known 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, and
• 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, such as those dust masks 
that are specially designed to filter out microscopic particles. 

Содержание D551H

Страница 1: ...operation and operator safety When properly cared for it will give you years of rugged trouble free performance WARNING To reduce the risk of injury the user must read and understand the operator s ma...

Страница 2: ...Assembly 10 n Operation 10 14 n Maintenance 14 15 n Parts Ordering Service 16 TABLE OF CONTENTS INTRODUCTION This tool has many features for making its use more pleasant and enjoyable Safety performan...

Страница 3: ...tool n Keep the tool and its handle dry clean and free from oil and grease Always use a clean cloth when clean ing Never use brake fluids gasoline petroleum based products or any strong solvents to cl...

Страница 4: ...ed 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 a...

Страница 5: ...njury user must read and understand operator s manual before using this product Eye Protection Always wear safety goggles or safety glasses with side shields or a full face shield when operating this...

Страница 6: ...ially hazardous situation which if not avoided may result in minor or moderate injury CAUTION Without Safety Alert Symbol Indicates a situation that may result in property damage WARNING To avoid seri...

Страница 7: ...ion cords before each use If damaged replace immediately Never use tool with a damaged cord since touching the damaged area could cause electrical shock resulting in serious injury DOUBLE INSULATION D...

Страница 8: ...2 in Hammer Speed Low 0 16 000 BPM High 0 48 000 BPM No Load Speed Low 0 1 000 min High 0 3 000 min Input 120 V 60 Hz AC only 5 5 Amps Net Weight 5 75 lbs Blows Per Minute AUXILIARY HANDLE ASSEMBLY D...

Страница 9: ...perating in different positions and at different angles GRIPZONE OVERMOLD TECHNOLOGY The hammer drill features Gripzone overmold technology for improved comfort with a positive grip LOCK ON BUTTON The...

Страница 10: ...ve care fully inspected and satisfactorily operated the tool n If any parts are damaged or missing please call 1 800 525 2579 for assistance PACKING LIST Hammer Drill Carrying Case Operator s Manual W...

Страница 11: ...igure 3 This could cause the drill bit to be thrown from the drill resulting in possible serious injury or damage to the chuck n Insert the drill bit completely into the chuck n Tighten the chuck jaws...

Страница 12: ...See Figure 7 CAUTION Never change gears while the tool is running Failure to obey this caution could result in serious damage to the drill The hammer drill has a two speed knob that provides a high s...

Страница 13: ...mmer ing Failure to heed this caution may result in damage to the drill LOCKING ON See Figure 10 The lock on feature allows you to lock the drill on when you operate it continuously for extended perio...

Страница 14: ...Plug the hammer drill into a power supply n Hold the drill firmly and place the bit at the point to be drilled n Depress the switch trigger to start the drill n Move the drill bit into the workpiece...

Страница 15: ...he hex key sharply with a mallet in a clockwise direction n Open the chuck jaws and remove the hex key n Remove the chuck screw by turning it in a clockwise direction with a screwdriver NOTE The screw...

Страница 16: ...l or visit Please call 1 800 525 2579 for your nearest Ryobi Authorized Service Center You can also check our web site at www ryobitools com for a complete list of Authorized Service Centers MODEL NO...

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