Ryobi RAH125 Operation manual

AIR HAMMER
OWNER’S OPERATING MANUAL
RAH125

English
1. Cylinder
2. Trigger
3. Air inlet plug
4. Flow regulator
5. Spring
DESCRIPTION
6. Sword
7. Grinding head
8. Wrench
9. Adj. knob

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

1
English
GENERAL SAFETY RULES
■Always wear personal protective safety glasses,
gloves, ear protectors, face mask or respiratory
equipment and protective clothing.
■Always ensure machine is switched off before
connecting to air supply.
■Disconnect any machine from the air supply before
changing any accessories, and before servicing any
type of machine.
■Do not wear watches, rings bracelets or loose clothing
when using air tools.
■Do not overload the machine. Allow the tool to operate
at its optimum speed for maximum efficiency.
■Do not increase the air pressure above the
manufacturers recommended level, as excessive
overload can cause the machine casing to split. Also
this creates excessive wear on moving parts and
possible failure.
■In the interests of safety and possible damage to the
machine/operator, always ensure that the machine
has stopped before putting it down after use.
■Always ensure that the accessories such as blades,
discs, sockets, etc. are rated/designed for use with the
machine. Also correctly and securely fastened before
connecting the machine to the air supply.
■Ensure you read, understand and apply safety
instructions before use.
■Keep children away from the tool and workplaces
when using the tools.
■Air tools are not generally insulated and should not
come in contact with electric power sources.
■Air tools should not be used in a potentially explosive
environment.
■Pay attention while working with certain materials that
will create emission of dust and fumes. This will cause
potentially explosive environment.
■Working with percussive tools can cause the ejection
of elements during chipping or demolishing work.
■Unsuitable postures may not allow counteracting of
normal or unexpected movement of the tool.
■Pay attention to the whipping compressed air hose.
■Particles may be ejected when chipping or
demolishing. Appropriate environmental and personal
protection should be used.
■Unsuitable postures to counteract the effects of a
sudden break of the inserted tools.
■The spare parts would not affect the health and safety
of the operator.
SYMBOLS
Wear ear protection
Wear eye protection
Please read the instructions carefully before
starting the tool.
SPECIFICATIONS
Chisel shank 10.2 mm (2/5”)
Bore diameter 19.0 mm (3/4”)
Blow per min 4500 bpm
Avg. air consumption 79.2 L/min (2.8 cfm)
Operating pressure 90psi (6.3bar)
Air inlet size 6.35 mm (1/4”)
Air Hose ID 9.52 mm (3/8”)
Weight 1.3 kg
A weighted sound
pressure level
84.0 dB(A) +3 dB
Sound power level 95.0 dB(A) +3 dB
Vibration value 14.6 m/s2
Uncertainty 1 m/s2
Noise Emission Values is in accordance with EN ISO 4871
and EN ISO 15744.
Vibration emission value is in accordance with EN 12096,
EN 28662-1 and EN ISO 8662-9.
APPLICATIONS
The tool is ideal for cutting, chipping and scraping. It
features hardened steel barrel and piston for less wear
and longer life. It has lightweight aluminum pistol-grip
housing and front exhaust. Any other use is forbidden.
AIR SUPPLY AND OPERATION
■Ensure air valve (or trigger) is in the “off” position
before connecting to the air supply.
■Required air pressure of 90psi, and an air flow
according to specification.
■Connect the tool to the air hose.
■Press the trigger to operate the tool.
■DO NOT use any additional force upon the

2
English
tool.
■DO NOT allow tool 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 energy supply.
■Disconnect Air tools from the energy source
before changing accessories or making
adjustments.
■Release your trigger and take the tool away worktable
when a sudden break of the inserted tool.
■For inserting the specific chisel to the tool, insert the
specific chisel to quick change retainer and cylinder.
■Turning the quick change retainer for tighten and
securing the chisel.
■Before operation, ensure the inserted tool is fixed in
tool.
WARNING
Ensure the air supply is clean and does not exceed
90psi while operating the tool. Too high an air pressure
and unclean air will shorten the product life due to
excessive wear and may be dangerous, causing
damage and/or personal injury.
LUBRICATION
An automatic in-line filter-regulator-lubricator is
recommended (Fig. 6) as it increases tool life and keeps
the tool in sustained operation. The in-line lubricator
should be regularly checked and filled 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 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 tool for an extended
period of time (overnight, weekend, etc.), it should receive
a generous amount of lubrication at that time. The tool
should be run for approximately 30 seconds to ensure oil
has been evenly distributed throughout the tool. The tool
should be stored in a clean and dry environment.
●It is most important that the tool be properly
lubricated by keeping the air line lubricator filled
and correctly adjusted. Without proper lubrication
the tool 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 tools O-rings
and other rubber parts.
IMPORTANT!
If a filter/regulator/lubricator is not installed on the air
system, air operated tools should be lubricated at least
once a day or after 2 hours work with 2 to 6 drops of oil,
depending on the work environment, directly through
the male fitting in the tool housing.
LOADING AND OPERATION
WARNING
Ensure the air supply is clean and does not exceed
90psi while operating the tool. Too high an air pressure
and unclean air will shorten the product 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 hose
diameter should be 9.52 mm (3/8”) I.D.
■Keep hose away from heat, oil and sharp edges.
Check hose for wear, and make certain that all
connections are secure.
■The flow of air may be regulated by adjusting flow
valve at the base of the handle.
■An inserted tool that is exposed to heavy strains
and can after a long period of use break due to
fatigue
■That 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 worn, or damaged tool.
■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.

3
English
MAINTENANCE
■Keep the tool safe by regular maintenance.
■Always keep your air tool clean and lubricated. Daily
lubrication is essential to avoid internal corrosion and
possible failure.
■Drain the air tank daily. Water in the air line will
damage the tool.
■Clean air inlet filter weekly.
■Lubricate the air tool daily with a few drops of air tool
oil dripped into the air inlet.
■Maintenance shall be taken weekly.
■If the tool cannot be used anymore, make sure to
dispose of it so as not to impose hazards on people
and the environment.
■Only lubricants (air tool white oil) recommended by the
manufacturer should be used.
TROUBLESHOOTING
WARNING
If any of the following symptoms appears during your
operating, stop using the tool immediately, or serious
personal injury could result. Only qualified persons or
an authorized service center can perform repairs or
replacement of tool.
Disconnect tool from air supply before attempting repair or
adjustment. When replacing O-rings or cylinder, lubricate
with air tool oil before assembly.
PROBLEM: Tool runs at normal speed but fails under
load.
POSSIBLE CAUSES
■Motor parts worn.
■Cam clutch 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, ie. a typical oiled/lubricated tool requires
1⁄2 ounce of oil.
Grease lubrication
NOTE: Heat usually indicates insufficient grease in
chamber. Severe operating conditions may require
more frequent lubrication.
PROBLEM: Tool runs slowly. Air flows slightly from
exhaust.
POSSIBLE CAUSES
■Motor parts jammed with dirt particles.
■Power regulator in closed position.
■Air flow blocked by dirt.
REMEDIES
■Check air inlet filter for blockage.
■Pour air tool lubricating oil into air inlet as per
instructions.
■Operate tool in short bursts quickly reversing rotation
back and forth where applicable.
■Repeat above as needed.
PROBLEM: Tools will not run. Air flows freely from
exhaust
POSSIBLE CAUSE
One or more motor vanes stuck due to material build
up.
REMEDIES
■Pour air tool lubricating tool into air inlet.
■Operate tool in short bursts of forward and/or reverse
rotation where applicable.
■Tap motor housing gently with plastic mallet.
■Disconnect supply. Free motor by rotating drive shank
manually where applicable
■If tool remains jammed return to service centre.
PROBLEM: Tool will not shut off.
POSSIBLE CAUSE
‘O’ rings throttle valve dislodged from seat inlet valve.
REMEDY
Replace ‘O’ ring .
NOTE: Repairs should be carried out by a qualified
person.P

4
English
PARTS LIST
No. Description No. Description No. Description No. Description
1 Handle 7 Valve stem 13 Lower Valve Case 19 Quick coupler
2 Pin 3x16 8 Sealing washer 14 Piston 20 Rubber Grip
3 Pin 3x17.5 9 Throttleer spring 15 Cylinder 21 Anti-dust cap
4 O-ring 8x1.8 10 Air inlet plug 16 Quick change Retainer
5 Regulator 11 Air inlet valve seat 17 Chisel
6 Trigger 12 Valve Disc 18 Oil pot

TECHTRONIC INDUSTRIES (AUSTRALIA) PTY. LTD.
Level 1. 666 Doncaster Road,
Doncaster, Victoria 3108
Australia.
Tel: [phone] Fax No.: 613 9840 6133 www.ryobi.com.au