Ryobi RA-DAS150-B User manual

DUAL ACTION SANDER
OPERATOR'S MANUAL
ORIGINAL INSTRUCTIONS
RA-DAS150-B

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

1. Trigger lock pin
2. Trigger
3. Protection cover
4. Sanding pad
5. Handle grip
6. Air inlet
7. Nitto style coupler
8. Drive spindle
9. Wrench
10. Axle adjuster
11. Air regulator adj.
knob
DESCRIPTION
Fig.1
Fig.4
Fig.5 Fig.6
Fig.7
Quick
connector
Quick
connector Lubricator Filter
Cut-off
valve
Regulator
(0-8.5 bar)
Quick
coupler
Tool Air
compressor
Quick
coupler
Air hose
Fig.2
10
8
4
Fig.3
2
56
3
8
1
9
1
11
2
4
7

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 sander or polisher. Failure to do so can result in
serious bodily injury.
■Only qualified and trained operators should install,
adjust or use the sander or polisher.
■Do not modify this sander or polisher. 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 a sander or polisher if the tool 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
■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
operation of the sander or polisher. 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.
ENTANGLEMENT HAZARDS
■Choking, scalping and/or lacerations can occur if loose
clothing, personal jewelry, neck wear, hair or gloves
are not kept away from the tool and its accessories.
OPERATING HAZARDS
■Use of the tool can expose the operator's hands to
hazards, including cuts and abrasions and heat. Wear
suitable gloves to protect 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.
■Personal protective safety glasses shall be
used; suitable gloves and protective clothing are
recommended.
■Inspect the backing pad before each use. Do not use if
cracked or broken or if it has been dropped.
■Avoid direct contact with the moving sanding pad in
order to prevent pinching or cutting of hands or other
body parts. Wear suitable gloves to protect hands.
■Never run the tool unless abrasive is applied to the
work piece.
■There is a risk of electrostatic discharge if used on
plastic and other non-conductive materials.
■Potentially explosive atmospheres can be caused by
dust and fumes resulting from sanding or grinding.
Always use dust extraction or suppression systems
which are suitable for the material being processed.
REPETITIVE MOTIONS HAZARDS
■When using a sander or polisher 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 sander or polisher, the operator should
adopt a comfortable posture whilst maintaining secure
footing and avoiding awkward or off-balance postures.
The operator should change posture during extended
tasks; this 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 sander or polisher from the energy
supply before fitting or changing the inserted tool or
accessory.
■Avoid direct contact with the inserted tool during and
after use, as it can be hot or sharp.
■Use only sizes and types of accessories and
consumables that are recommended by the
manufacturer of sanders or polishers; do not use other
types or sizes of accessories or consumables.
■Grinding wheels and cutting-off tools shall not be used.
■Check that the maximum operating speed of the
inserted tool (flap wheels, abrasive belts, fiber discs,
backing pads, etc.), is higher than the rated speed of
the sander or polisher.
■Self-fixing sander discs shall be placed concentrically
on the supporting pad.
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.

2
■The sander or polisher is not intended for use in
potentially explosive atmospheres and is not insulated
against contact with electric power.
■Ensure that there are no electrical cables, gas pipes,
etc., which can cause a hazard if damaged by use of
the tool.
DUST AND FUME HAZARDS
■Dust and fumes generated when using sanders and
polishers 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 sander or polisher as
recommended in these instructions, to minimize dust
or fume emissions.
■Direct the exhaust so as to minimize 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 instruction handbook, 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, risk assessment and implementation
of appropriate controls for these hazards are essential.
■Appropriate controls to reduce the risk can 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 sander or polisher as
recommended in the instruction handbook, to prevent
an unnecessary increase in the noise level.
■Select, maintain and replace the consumable/inserted
tool as recommended in the instruction handbook, to
prevent an unnecessary increase in noise.
■If the sander or polisher has a silencer, always ensure
it is in place and in good working order when the tool
is being operated.
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-
3 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
sander or polisher, tell your employer and consult a
physician.
■Operate and maintain the sander or polisher as
recommended in the instruction handbook, to prevent
an unnecessary increase in vibration levels.
■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.
ADDITIONAL SAFETY INSTRUCTIONS FOR PNEU-
MATIC POWER TOOLS
■Air under pressure can cause severe injury.
■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.
■Whenever universal twist couplings (claw couplings)
are used, lock pins shall be installed and whip check
safety cables shall be used to safeguard against
possible hose-to-tool or hose-to-hose connection
failure.
■Do not exceed the maximum air pressure stated on
the tool.
■Never carry an air tool by the hose.
WARNING
Grinding wheels and cutting off tools shall not be used.

3
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
Sanding pad 150 mm (6”)
No-load speed 11,200/min
Speed regulation range 2,000~11,000/min
Avg. air consumption 141.5 L/min (5 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 1.99 kg
A-Weighted sound pressure
level 86.7 dB(A), k=3 dB
Sound power level 97.7 dB(A), k=3 dB
Vibration value 5.3 m/s2
Uncertainty of measurement 0.033 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 provides a patternless nish. The tool is ideal
for sanding jobs such as feather edging, metal preparation
and blending body. Any other use is forbidden. Other
features include: swirl-free nishes from its dual action
pad motion, built-in regulator for vairable speed control,
side exhaust, and airow adjustment.
The product is mainly used in boat building and
maintenance, automobile repair and maintenance,
carpentry work, furniture production, non-metallic surface
polishing, derusting and other industries' polishing,
cleaning.
– Lightweight composite material housing
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 air valve (or trigger) is in the “off” position
before connecting to the air supply.
■Connect the product to the air hose.
■Press the trigger to operate the product.
■The air regulator controls the amount of air flow
entering the rotor. Turn the air regular adjustment
knob to decrease/increase the speed of the product.
■Do not allow the product to free run for an extended
period of time as this will shorten its life.
■Disconnect the product from the air supply before
changing accessories or making adjustments.
■Required air pressure of 6.3 bar (90 psi), and an air
flow according to specifications.
■Do not apply additional force on 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.

4
LUBRICATION
An automatic in-line lter-regulator-lubricator is
recommended (Fig. 7) 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 7.
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
Drain the air tank daily. Water in the air line will damage
the tool.
■Air tools should not be used in a potentially explosive
environment.
■Only polishing and sanding inserted tools as
recommended by the manufacturer of the product are
used.
■Clean the air inlet filter weekly.
■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.
■Use the tool only for its intended purpose.
MAINTENANCE
■Keep the product safe by regular maintenance.
■Check that the maximum operating speed of the
accessories is higher than the rated speed of the tool.
■Personal protective safety glasses shall be used;
gloves and protective clothing are recommended.
■Personal protection and dust collection device shall be
chosen with regard to the material being worked upon.
■Release the start and stop device in case of energy
supply failure.
■No spare parts are to be used when these affect the
health and safety of operators.
■Always keep your air tool clean and lubricated. Daily
lubrication is essential to avoid internal corrosion and
possible failure.
■Lubricate the tool daily with a few drops of air tool oil
dripped into the air inlet.
■Maintenance shall be performed weekly.
■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.
■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.
■When not in use, disconnect from air supply, clean
tool and store in a safe, dry, childproof location. If the
tool cannot be used anymore, make sure to dispose
of it so as not to impose hazards to people and the
environment.
■Check the speed after each service in relevant cases.

5
TROUBLESHOOTING
WARNING
If any of the following symptoms appears during
operation, stop using the tool immediately, or serious
personal injury could result. Only qualied persons or
an authorised service centre can perform repairs or
replacement of the tool.
Disconnect tool from the 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 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: Tool runs slowly. Air ows slightly from
exhaust.
POSSIBLE CAUSES
■Motor parts are jammed with dirt particles.
■Air 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 tool in short bursts quickly reversing rotation
back and forth where applicable.
■Repeat above as needed.
PROBLEM: Tool 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 tool 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: Tool 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.
20161209v2

6
PARTS LIST
No. Description No. Description No. Description No. Description
01 Sanding pad 15 Washer 6 29 Housing grip 43 O-ring 3.5 x 1.5
02 Drive spindle 16 Copper cushion 30 Bolt 3 x 7 44 O-ring 8 x 1.5
03 Retainer ring 32 17 Wave washer 31 O-ring 7.5 x 1.8 45 Valve seat
04 Wave washer 18 Washer 32 Handing cover 46 Bracket
05 Bearing 6201 19 Screw M6 x 35 33 Air volume regulator 47 Washer
06 Nut 20 Shaft 34 O-ring 18.0 x 1.8 48 Washer
07 Orbital shaft 21 Semicircle key 3 x 5x13 35 Nut 49 Hex nut M10
08 Screw M5 x 25 22 Bearing 6200ZZ 36 Screw M4 x 8 50 Trigger
09 Screw M5 x 15 23 Cylinder cap 37 Handing cover 51 Screw M4 x 35
10 Washer 5 24 Rotor Blade 38 O-ring 18.0 x 1.8 52 Hex nut M4
11 Motor housing 25 Rotor 39 Air inlet plug 53 O-ring 11.2 x 1.6
12 Gasket 26 Cylinder 40 Spring
13 Hex Nut M6 27 Retainer ring 8 41 O-ring 4.0 x 2
14 Nut 28 Gun body 42 Valve stem

Techtronic Industries (Australia) Pty. Ltd.
31 Gilby Road
Mt Waverley, VIC 3149, Australia
Techtronic Industries New Zealand Ltd.
2 Landing Drive, Mangere
Auckland, New Zealand 2022