Ryobi RAH-G User manual

AIR HAMMER
OPERATOR'S MANUAL
ORIGINAL INSTRUCTIONS
RAH-G

Important!
It is essential that you read the instructions in this manual before
operating this machine.
Subject to technical modifications.

1. Cylinder
2. Trigger
3. Air inlet
4. Nitto style coupler
5. Chisel 1
6. Chisel 2
7. Chisel 3
8. Chisel 4
9. Hammer spring
10. Chisel
DESCRIPTION
12
3Fig.1 Fig.2
Fig.4 Fig.5
Fig.6
3
Quick
connector
Quick
connector Lubricator Filter
Cut-off
valve
Regulator
(0-8.5 bar)
Quick
coupler
Tool Air
compressor
Quick
coupler
Air hose
4
3
2
10
9
Fig.3
9
7
5
6
8

1
GENERAL SAFETY RULES
■For multiple hazards, read and understand the safety
instructions before installing, operating, repairing,
maintaining, changing accessories on, or working
near, the non-rotary percussive power tool. Failure to
do so can result in serious bodily injury.
■Only qualified and trained operators should install,
adjust or use the non-rotary percussive power tool.
■Do not modify this non-rotary percussive power tool.
Modifications can reduce the effectiveness of safety
measures and increase the risks to the operator.
■Do not discard the safety instructions; give them to the
operator.
■Do not use the non-rotary percussive power tool if it
has been damaged.
■Tools shall be inspected periodically to verify that the
ratings and markings required by this part of ISO 11148
are legibly marked on the tool. The employer/user
shall contact the manufacturer to obtain replacement
marking labels when necessary.
PROJECTILE HAZARDS
■Disconnect the non-rotary percussive power tool from
the energy source when changing inserted tool or
accessories.
■Be aware that failure of the work piece, or accessories,
or even of the inserted tool itself can generate high
velocity projectiles.
■Always wear impact-resistant eye protection during
the operation of the non-rotary percussive power tool.
The grade of protection required should be assessed
for each use.
■For overhead work, wear a safety helmet.
■The risks to others should also be assessed at this
time.
■Ensure that the work piece is securely fixed.
■Never operate a tool unless the inserted tool is
retained in the tool with a proper retainer.
■To avoid injury, retainer parts shall be replaced when
they become worn, cracked or distorted.
■Hold the inserted tool firmly against the work surface
before starting the tool.
OPERATING HAZARDS
■Use of the tool can expose the operator’s hands to
hazards, including impacts, cuts and abrasions and
heat. Wear suitable gloves to protect the hands.
■Operators and maintenance personnel shall be
physically able to handle the bulk, weight and power
of the tool.
■Hold the tool correctly; be ready to counteract normal
or sudden movements and have both hands available.
■Maintain a balanced body position and secure footing.
■Release the start-and-stop device in the case of an
interruption of the energy supply.
■Use only lubricants recommended by the manufacturer.
■Avoid direct contact with the inserted tool during and
after use as it can become hot.
■Personal protective safety glasses shall be
used; suitable gloves and protective clothing are
recommended.
REPETITIVE MOTIONS HAZARDS
■When using a non-rotary percussive power tool to
perform work-related activities, the operator can
experience discomfort in the hands, arms, shoulders,
neck or other parts of the body.
■While using a non-rotary percussive power tool, the
operator should adopt a comfortable posture while
maintaining a secure footing and avoiding awkward
off-balanced postures. The operator should change
posture during extended tasks, which can help avoid
discomfort and fatigue.
■If the operator experiences symptoms, such as
persistent or recurring discomfort, pain, throbbing,
aching, tingling, numbness, burning sensations or
stiffness, these warning signs should not be ignored.
The operator should tell the employer and consult a
qualified health professional.
ACCESSORY HAZARDS
■Disconnect the non-rotary percussive power tool from
the energy supply before changing the inserted tool
or accessory.
■Use only sizes and types of accessories and
consumables that are recommended by the non-rotary
percussive power tool manufacturer; do not use other
types or sizes of accessories and consumables.
■For hammers, where appropriate, never use any chisel
as a hand-struck tool. They are specifically designed
and heat-treated for use only in non-rotary percussive
power tools.
■For hammers and breakers, where appropriate, never
use blunt chisels, as they require excessive pressure
and can break from fatigue. Blunt tool-pieces can
increase vibration and, therefore, sharp tools should
always be used.
■For hammers, where appropriate, never cool a hot
accessory in water. Brittleness and early failure can
result.
■For hammers, where appropriate, chisel breakage or
tool damage can result from misuse of using the tool
as a lever, e.g. prising. Take smaller “bites” to avoid
getting stuck.
■Avoid direct contact with the inserted tool during and
after use, as it can be hot or sharp.

2
WORKPLACE HAZARDS
■Slips, trips and falls are major causes of workplace
injury. Be aware of slippery surfaces caused by use of
the tool and also of trip hazards caused by the air line
or hydraulic hose.
■Proceed with care in unfamiliar surroundings. Hidden
hazards, such as electricity or other utility lines, can
exist.
■The non-rotary percussive power tool is not intended
for use in potentially explosive atmospheres and is
not insulated against coming into contact with electric
power.
■Make sure there are no electrical cables, gas pipes,
etc., that can cause a hazard if damaged by use of
the tool.
DUST AND FUME HAZARDS
■Dust and fumes generated when using non-rotary
percussive power tools can cause ill health (for
example cancer, birth defects, asthma and/or
dermatitis); risk assessment and implementation of
appropriate controls for these hazards are essential.
■Risk assessment should include dust created by the
use of the tool and the potential for disturbing existing
dust.
■Operate and maintain the non-rotary percussive power
tool as recommended in the instructions handbook, to
minimize dust or fume emissions.
■Direct the exhaust so as to minimize the disturbance of
dust in a dust-filled environment.
■Where dust or fumes are created, the priority shall be
to control them at the point of emission.
■All integral features or accessories for the collection,
extraction or suppression of airborne dust or fumes
should be correctly used and maintained in accordance
with the manufacturer’s instructions.
■Select, maintain and replace the consumable/inserted
tool as recommended in the instructions, to prevent an
unnecessary increase in dust or fumes.
■Use respiratory protection in accordance with
employer’s instructions and as required by
occupational health and safety regulations.
NOISE HAZARDS
■Exposure to high noise levels can cause permanent,
disabling hearing loss and other problems, such
as tinnitus (ringing, buzzing, whistling or humming
in the ears). Therefore, a risk assessment and
implementation of appropriate controls for these
hazards are essential.
■Appropriate controls to reduce the risk may include
actions, such as damping materials to prevent work
pieces from “ringing”.
■Use hearing protection in accordance with employer’s
instructions and as required by occupational health
and safety regulations.
■Operate and maintain the non-rotary percussive power
tool as recommended in the instructions handbook, to
prevent an unnecessary increase in noise levels.
■Select, maintain and replace the consumable/inserted
tool as recommended in the instructions handbook, to
prevent an unnecessary increase in noise.
■If the non-rotary percussive power tool has a silencer,
always ensure it is in place and in good working
order when the non-rotary percussive power tool is
operating.
VIBRATION HAZARDS
The information for use shall draw attention to vibration
hazards that have not been eliminated by design and
construction and remain as residual vibration risks. It shall
enable employers to identify the circumstances in which
the operator is likely to be at risk from vibration exposure.
If the vibration-emission value obtained using ISO 28927-
6 for rammers, ISO 28927-9 for hammers and breakers
and ISO 28927-10 for scaling hammers and needle
scalers does not adequately represent the vibration
emission in the intended uses (and foreseeable misuses)
of the machine, additional information and/or warnings
shall be supplied to enable the risks arising from vibration
to be assessed and managed.
■Exposure to vibration can cause disabling damage to
the nerves and blood supply of the hands and arms.
■Wear warm clothing when working in cold conditions
and keep your hands warm and dry.
■If you experience numbness, tingling, pain or whitening
of the skin in your fingers or hands, stop using the non-
rotary percussive power tool, tell your employer and
consult a physician.
■Operate and maintain the non-rotary percussive power
tool as recommended in the instructions handbook, to
prevent an unnecessary increase in vibration.
■Do not hold the inserted tool with the free hand, as this
increases vibration exposure.
■Hold the tool with a light but safe grip, taking account
of the required hand reaction forces, because the risk
from vibration is generally greater when the grip force
is higher.
■Keep suspended handles in the central position and
avoid pushing the handles into the end stops.
■For breakers, cut small “bites” of concrete to prevent
the tool from jamming.
■For breakers, move the cutting tool every few seconds.
Stop the breaker when lifting the tool to change
position, because vibration is high when pulling up on
the handles.
ADDITIONAL SAFETY INSTRUCTIONS FOR PNEU-
MATIC POWER TOOLS
■Air under pressure can cause severe injury.

3
■Always shut off air supply, drain hose of air pressure
and disconnect tool from air supply when not in use,
before changing accessories or when making repairs;
■Never direct air at yourself or anyone else.
■Whipping hoses can cause severe injury. Always
check for damaged or loose hoses and fittings.
■Cold air shall be directed away from hands.
■Do not use quick-disconnect couplings at tool inlet.
Use hardened steel (or material with comparable
shock resistance) threaded hose fittings.
■Whenever universal twist couplings (claw couplings)
are used, lock pins shall be installed and whipcheck
safety cables shall be used to safeguard against
possible hose-to-tool and hose-to-hose connection
failure.
■Do not exceed the maximum air pressure stated on
the tool.
■Never carry an air tool by the hose.
SYMBOLS
Safety alert
CE conformity
Please read and understand all instructions
before operating the product, follow all
warnings and safety instructions.
Please read the instructions carefully before
starting the product.
Wear eye protection.
Wear ear protection.
Lubricate with air tool oil daily.
SPECIFICATIONS
Chisel shank 10.2 mm (2/5”)
Bore diameter 19.05 mm (3/4”)
Blow per min. 4,500/min
Avg. air consumption 79.2 L (2.8 cfm)
Maximum working pressure 6.3 bar (90 psi)
Air inlet size 6.35 mm (1/4”)
Air Hose ID 9.52 mm (3/8”)
Weight 1 kg
A-weighted sound pressure
level 95.8dB(A), k=3dB
Sound power level 106.8dB(A), k=3dB
Vibration value 11.5 m/s2
Uncertainty 1.7 m/s2
Noise emission values are in accordance with
EN ISO 4871 and EN ISO 15744.
Vibration emission values are in accordance with
EN12096 and EN28662-1.
APPLICATION
The product is ideal for cutting, chipping and scraping. It
features a hardened steel barrel and piston for less wear
and a longer life. It has a lightweight composite housing
and front exhaust. Any other use is forbidden.
– Soft grip for comfort and stability
– Heat-treated impact parts for durability
– Standard quick-change spring for speed and ease
of chisel change
RESIDUAL RISKS
Even if you are operating this product in accordance
with all the safety requirements, potential risks of injury
and damage remain. The following dangers can arise in
connection with the structure and design of this product:
1. Health defects resulting from vibration and noise
emission if the product is being used over long periods
of time or not adequately managed and properly
maintained.
2. Injuries and damage to property due to broken cutting
attachments or the sudden impact of hidden objects
during use.
3. Danger of injury and property damage caused by
ying objects.
AIR SUPPLY AND OPERATION
■Ensure the air valve (or trigger) is in the “off” position
before connecting to the air supply.
■Required air pressure of 6.3 bar (90 psi), and an air
flow according to specifications.
■Connect the product to the air hose.
■To fit/change a chisel accessory, insert the spring onto
the cylinder body and insert the appropriate chisel to
the spring.

4
■Press the trigger to operate the product.
■Do not allow the product to free run for an extended
period of time as this will shorten its life.
■Release the start and stop device in the case of an
interruption of the air supply.
■Disconnect the product from the air supply before
changing accessories or making adjustments.
■Turn the quick change retainer for tighten and securing
the chisel.
■Before operation, ensure the inserted accessory is
fixed in the product.
WARNING
Ensure the air supply is clean and does not exceed
6.3 bar (90 psi) while operating the product. Too high an
air pressure and unclean air will shorten the product's
life due to excessive wear, and may be dangerous
causing damage and/or personal injury.
LUBRICATION
An automatic in-line lter-regulator-lubricator is
recommended (Fig. 6) as it increases product life and
keeps the product in sustained operation. The in-line
lubricator should be regularly checked and lled with air
tool oil.
Proper adjustment of the in-line lubricator is performed by
placing a sheet of paper next to the exhaust ports and
holding the throttle open for approximately 30 seconds.
The lubricator is properly set when a light stain of oil
collects on the paper. Excessive amounts of oil should be
avoided.
If it becomes necessary to store the product for an extended
period of time (overnight, weekend, etc.), it should receive
a generous amount of lubrication at that time. The product
should be run for approximately 30 seconds to ensure oil
has been evenly distributed throughout the product. The
product should be stored in a clean and dry environment.
●It is most important that the product be properly
lubricated by keeping the air line lubricator filled
and correctly adjusted. Without proper lubrication
the product will not work properly and parts will
wear prematurely.
●Use correct lubricant in the air line lubricator. The
lubricator should be of low air flow or changing air
flow type, and should be kept filled to the correct
level. Use only recommended lubricants, specially
made for pneumatic applications. Substitutes
may harm the rubber compounds in the product's
O-rings and other rubber parts.
IMPORTANT!
See Figure 6.
If a lter/regulator/lubricator is not installed on the air
system, air operated tools should be lubricated at least
once a day or after 2 hours of work with 2 - 6 drops
of oil, depending on the work environment, directly
through the male tting in the tool housing.
LOADING AND OPERATION
WARNING
Ensure the air supply is clean and does not exceed
6.3 bar (90 psi) while operating the product. Too high an
air pressure and unclean air will shorten the product's
life due to excessive wear, and may be dangerous
causing damage and/or personal injury.
■Line pressure should be increased to compensate for
unusually long air hoses (over 8 metres). The minimum
hose diameter should be 6.35 mm (1/4”) I.D. and the
fittings must have the same inside dimensions.
■Keep hose away from heat, oil and sharp edges. Check
hose for wear, and make sure that all connections are
secure.
■Any accessory that is exposed to continuous strain
can, after a long period of use, break due to fatigue.
■Unexpected tool movement or breakage of inserted
tool may cause injuries to the lower limbs.
■Holding the inserted tool by the free hand can be a
source of vibration damage. This practice is forbidden.
■Do not use a worn or damaged tool or accessory.
■Loss of power or erratic action may be due to the
following:
– Excessive drain on the air line. Moisture or
restriction in the air pipe. Incorrect size or type of
hose connectors. To remedy check the air supply.
– Grit or gum deposits in the tool may also reduce
performance. If your model has an air strainer
(located in the area of the air inlet), remove the
strainer and clean it.
■Use the product only for its intended purpose.
MAINTENANCE
■Keep the product safe by regular maintenance.
■Always keep your air tool clean and lubricated. Daily
lubrication is essential to avoid internal corrosion and
possible failure.
■Lubricate the product daily with a few drops of air tool
oil dripped into the air inlet.
■Maintenance shall be performed weekly.

5
■Drain the air tank daily. Water in the air line will
damage the product.
■If the product cannot be used anymore, make sure to
dispose of it so as not to impose hazards on people
and the environment.
■Air tool white oil is recommended for lubrication.
■Only lubricants recommended by the manufacturer
should be used.
■Clean the air inlet filter weekly.
TROUBLESHOOTING
WARNING
If any of the following symptoms appears during
operation, stop using the product immediately, or
serious personal injury could result. Only qualied
persons or an authorised service centre can perform
repairs or replacement of the product.
Disconnect the product from the air supply before
attempting repair or adjustment. When replacing O-rings
or cylinder, lubricate with air tool oil before assembly.
PROBLEM: Product runs at normal speed but fails
under load.
POSSIBLE CAUSES
■Motor parts are worn.
■Cam clutch is worn or sticking due to lack of lubricant.
REMEDIES
■Lubricate clutch housing.
■Check for excess clutch oil. Clutch cases need only
be half full. Overfilling can cause drag on high speed
clutch parts, i.e. a typical oiled/lubricated tool requires
14.20 ml (1/2 ounce) of oil.
Grease lubrication
NOTE: Heat usually indicates insufficient grease in
chamber. Severe operating conditions may require
more frequent lubrication.
PROBLEM: Product runs slowly. Air ows slightly
from exhaust.
POSSIBLE CAUSES
■Motor parts are jammed with dirt particles.
■Power regulator is in closed position.
■Air flow is blocked by dirt.
REMEDIES
■Check air inlet filter for blockage.
■Pour air tool lubricating oil into air inlet as per
instructions.
■Operate the product in short bursts quickly reversing
rotation back and forth where applicable.
■Repeat above as needed.
PROBLEM: Product will not run. Air flows freely from
exhaust.
POSSIBLE CAUSE
One or more motor vanes are stuck due to material
build up.
REMEDIES
■Pour air tool lubricating oil into air inlet.
■Operate the product in short bursts of forward and/or
reverse rotation where applicable.
■Tap motor housing gently with a plastic mallet.
■Disconnect the air supply. Free the motor by rotating
drive shank manually where applicable.
■If the product remains jammed, return to the service
centre.
PROBLEM: Product will not shut off.
POSSIBLE CAUSE
‘O’ rings throttle valve is dislodged from seat inlet
valve.
REMEDY
Replace the ‘O’ ring.
NOTE: Repairs should be carried out by a qualied
person.

6
PARTS LIST
No. Description No. Description No. Description No. Description
1 Chisel 7 Valve disc 13 Compression Spring 19 Pin 3 x 22
2 Spring 8 Air inlet valve seat 14 Anti-dust cap 20 Pin 3 x 28
3 Exhaust cover 9 Handle 15 O-ring 14 x 2 21 O-ring 11.8 x 2.3
4 Cylinder 10 Cushion 16 O-ring 4 x 1.1 22 Air inlet
5 Piston 11 Bolt M4 x 8 17 O-ring 4 x 2
6 Lower valve case 12 Trigger 18 Valve stem

Techtronic Industries (Australia) Pty. Ltd.
Level 1, 660 Doncaster Road
Doncaster, VIC 3108, Australia
Techtronic Industries New Zealand Ltd.
18-26 Amelia Earhart Avenue
Mangere, Auckland 2022, New Zealand