RA-RW38-B

RATCHET WRENCH
Operator's MANUAL
Original instructions
Important!
It is essential that you read the instructions in this manual before
operating this machine.

Subject to technical modifications.

 Description
1. Direction switch 4. Air inlet 7. Nitto style coupler 10. Reverse direction
2. Clamp nut 5. Trigger 8. Socket (not supplied)
3. Motor housing 6. Wrench anvil 9. Forward direction

1
2 3

5 7
4
4

Fig.1 Fig.2

6 1

8
9

10

Fig.3 Fig.4

Quick Quick
connector connector Lubricator Filter

Air
Tool compressor
Cut-off
valve
Quick Quick
coupler coupler

Air hose Regulator

(0-8.5 bar)
Fig.5
 of the tool.
General safety rules
■■ Hold the tool correctly; be ready to counteract normal
■■ For multiple hazards, read and understand the safety or sudden movements and have both hands available.
instructions before installing, operating, repairing,
maintaining, changing accessories on, or working ■■ Maintain a balanced body position and secure footing.
near the assembly power tool for threaded fasteners. ■■ In cases where the means to absorb the reaction torque
Failure to do so can result in serious bodily injury. are requested, it is recommended to use a suspension
■■ Only qualified and trained operators should install, arm whenever possible. If that is not possible, side
adjust or use the assembly power tool for threaded handles are recommended for straight case and pistol-
fasteners. grip tools. Reaction bars are recommended for angle
nut runners. In any case, it is recommended to use a
■■ Do not modify this assembly power tool for threaded means to absorb the reaction torque above 4 Nm for
fasteners. Modifications can reduce the effectiveness straight tools, above 10 Nm for pistol-grip tools, and
of safety measures and increase the risks to the above 60 Nm for angle nut runners.
operator.
■■ Release the start-and-stop device in the case of an
■■ Do not discard the safety instructions; give them to the interruption of the energy supply.
operator.
■■ Use only lubricants recommended by the manufacturer.
■■ Do not use the assembly power tool for threaded
fasteners if it has been damaged. ■■ Fingers can be crushed in open-ended crow-foot nut
runners.
■■ Tools shall be inspected periodically to verify that the
ratings and markings required by this part of ISO 11148 ■■ Do not use in confined spaces and beware of crushing
are legibly marked on the tool. The employer/user hands between tool and work piece, especially when
shall contact the manufacturer to obtain replacement unscrewing.
marking labels when necessary.
Repetitive motions hazards
Projectile hazards ■■ When using a power tool for, the operator can
■■ Failure of the work piece, of accessories or even of experience discomfort in the hands, arms, shoulders,
the inserted tool itself can generate high-velocity neck, or other parts of the body.
projectiles. ■■ While using an assembly power tool for threaded
■■ Always wear impact-resistant eye protection during fasteners, the operator should adopt a comfortable
the operation of the assembly power tool for threaded posture while maintaining secure footing and avoiding
fasteners. The grade of protection required should be awkward or off-balanced postures. The operator
assessed for each use. should change posture during extended tasks, which
can help avoid discomfort and fatigue.
■■ Ensure that the work piece is securely fixed.
■■ If the operator experiences symptoms such as
Entanglement hazards persistent or recurring discomfort, pain, throbbing,
aching, tingling, numbness, burning sensations or
■■ Entanglement hazards can result in choking, scalping stiffness, these warning signs should not be ignored.
and/or lacerations if loose clothing, personal jewelry, The operator should tell the employer and consult a
neck ware, hair or gloves are not kept away from the qualified health professional.
tool and accessories.
■■ Gloves can become entangled with the rotating drive, Accessory hazards
causing severed or broken fingers. ■■ Disconnect the assembly power tool for threaded
■■ Rotating drive sockets and drive extensions can easily fasteners from the energy supply before changing the
entangle rubber-coated or metal-reinforced gloves. inserted tool or accessory.
■■ Do not wear loose-fitting gloves or gloves with cut or ■■ Do not touch sockets or accessories during impacting,
frayed fingers. as this increases the risk of cuts, burns or vibration
■■ Never hold the drive, socket or drive extension. injuries.
■■ Keep hands away from rotating drives. ■■ Use only sizes and types of accessories and
consumables that are recommended by the assembly
Operating hazards power tool for threaded fasteners manufacturer;
do not use other types or sizes of accessories and
■■ The use of the tool can expose the operator’s hands consumables.
to hazards including crushing, impacts, cuts and
abrasions and heat. Wear suitable gloves to protect ■■ Use only impact-wrench-rated sockets in good
hands. condition, as poor condition or hand sockets and
accessories used with impact wrenches can shatter
■■ Operators and maintenance personnel shall be and become a projectile.
physically able to handle the bulk, weight and power
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Workplace hazards a silencer, always ensure it is in place and in good
■■ Slips, trips and falls are major causes of workplace working order when the assembly power tool for
injury. Be aware of slippery surfaces caused by the threaded fasteners is operating.
use of the tool and also of trip hazards caused by the ■■ Select, maintain and replace the consumable/inserted
air line or hydraulic hose. tool as recommended in the instructions handbook, to
■■ Proceed with care in unfamiliar surroundings. Hidden prevent an unnecessary increase in noise.
hazards, such as electricity or other utility lines, can
exist. Vibration hazards

■■ The assembly power tool for threaded fasteners is not The information for use shall draw attention to vibration
intended for use in potentially explosive atmospheres hazards that have not been eliminated by design and
and is not insulated against coming into contact with construction and remain as residual vibration risks. It
electric power. shall enable employers to identify the circumstances in
which the operator is likely to be at risk from vibration
■■ Make sure there are no electrical cables, gas pipes, exposure. If the vibration emission value obtained using
etc., that can cause a hazard if damaged by use of ISO 28927-2 does not adequately represent the vibration
the tool. emission in the intended uses (and foreseeable misuses)
of the machine, additional information shall be supplied
Dust and fume hazards to enable the risks arising from vibration to be assessed
■■ Dust and fumes generated when using assembly and managed.
power tools for threaded fasteners can cause ill health For recommended interface dimensions for spindles and
(for example cancer, birth defects, asthma and/or drive adapters to help reduce vibrations, see ISO/TS
dermatitis); risk assessment and implementation of 21108.
appropriate controls for these hazards are essential.
■■ Exposure to vibration can cause disabling damage to
■■ Risk assessment should include dust created by the the nerves and blood supply of the hands and arms.
use of the tool and the potential for disturbing existing
dust. ■■ Keep the hands away from the nutrunner sockets.
■■ Direct the exhaust so as to minimize disturbance of ■■ Wear warm clothing when working in cold conditions
dust in a dust-filled environment. and keep your hands warm and dry.
■■ Where dust or fumes are created, the priority shall be ■■ If you experience numbness, tingling, pain or whitening
to control them at the point of emission. of the skin in your fingers or hands, stop using the
assembly power tool for threaded fasteners, tell your
■■ All integral features or accessories for the collection, employer and consult a physician.
extraction or suppression of airborne dust or fumes
should be correctly used and maintained in accordance ■■ Operate and maintain the assembly power tool
with the manufacturer’s instructions. for threaded fasteners as recommended in the
instructions handbook, to prevent an unnecessary
■■ Use respiratory protection in accordance with increase in vibration levels.
employer’s instructions and as required by
occupational health and safety regulations. ■■ Do not use worn or ill-fitting sockets or extensions, as
this is likely to cause a substantial increase in vibration.
Noise hazards ■■ Select, maintain and replace the consumable/inserted
■■ Exposure to high noise levels can cause permanent, tool as recommended in the instructions handbook, to
disabling hearing loss and other problems, such prevent an unnecessary increase in vibration levels.
as tinnitus (ringing, buzzing, whistling or humming ■■ Sleeve fittings should be used where practicable.
in the ears). Therefore, a risk assessment and ■■ Support the weight of the tool in a stand, tensioner or
implementation of appropriate controls for these balancer, if possible.
hazards are essential.
■■ Hold the tool with a light but safe grip, taking account
■■ Appropriate controls to reduce the risk may include of the required hand reaction forces, because the risk
actions such as damping materials to prevent work from vibration is generally greater when the grip force
pieces from “ringing”. is higher.
■■ Use hearing protection in accordance with employer’s
instructions and as required by occupational health Additional safety instructions for pneu-
and safety regulations. matic power tools
■■ Operate and maintain the assembly power tool ■■ Air under pressure can cause severe injury.
for threaded fasteners as recommended in the ■■ Always shut off air supply, drain hose of air pressure
instructions handbook, to prevent an unnecessary and disconnect tool from air supply when not in use,
increase in noise levels. before changing accessories or when making repairs;
■■ If the assembly power tool for threaded fasteners has ■■ Never direct air at yourself or anyone else.
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■■ Whipping hoses can cause severe injury. Always
check for damaged or loose hoses and fittings.
Wear ear protection.
■■ Cold air shall be directed away from the hands.
■■ Do not use quick-disconnect couplings at tool inlet
for impact and air-hydraulic impulse wrenches. Use
Lubricate with air tool oil daily.
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 Specifications
safety cables shall be used to safeguard against
possible hose-to-tool and hose-and-hose connection Square drive 9.52 mm (3/8”)
failure.
No-load speed 160/min
■■ Do not exceed the maximum air pressure stated on
the tool. Max torque 68 N.m
■■ For torque-control and continuous-rotation tools, the Air consumption 114 L/min (4 cfm)
air pressure has a safety critical effect on performance.
Therefore, requirements for length and diameter of the Maximum working pressure 6.3 bar (90 psi)
hose shall be specified.
Weight 1.23 kg
■■ Never carry an air tool by the hose.
Air inlet size 6.35 mm (1/4”)
■■ Make sure the air tool is securely fixed on a suspension
device, if used. Air hose ID 9.52 mm (3/8”)
■■ Unsuitable postures may not allow counteracting of A weighted sound pressure
normal or unexpected movement of the air tool. 89.5dB(A), k=3dB
level
■■ Unexpected tool movement due to reaction forces or
breakage of inserted tool may cause injuries. Sound power level 100.5dB(A), k=3dB
■■ Ensure that the pressure of the air supply is not lower Vibration value 3.3 m/s2
than the lowest pressure specified by the manufacturer
for clutch-controlled assembly tools and make sure Uncertainty 0.43 m/s2
that the air supply pressure does not fall after the Noise emission values are in accordance with
clutch has been set. EN ISO 4871 and EN ISO 15744.
■■ Support handle and reaction bar are not required for Vibration emission values are in accordance with
this product. EN12096 and EN28662-1.

Symbols Application
The product is ideal for engine repairs, tune-ups, and
radiator work. It features a heavy-duty die-cast aluminum
Safety alert body, front exhaust and a steel angle head. The compact
head design allows access to tight areas. Any other use
is forbidden.
CE conformity This product is mainly used in the operation of removing
screws or nuts in all kinds of narrow-space locations
–– Lightweight composite material housing
Please read and understand all instructions
before operating the product, follow all –– Soft grip for extra comfort and control
warnings and safety instructions.
Residual Risks
Please read the instructions carefully before
Even if you are operating this product in accordance
starting the product.
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:
Wear eye protection.
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.

3
2. Injuries and damage to property due to broken cutting lubricated by keeping the air line lubricator filled
attachments or the sudden impact of hidden objects and correctly adjusted. Without proper lubrication
during use. the product will not work properly and parts will
3. Danger of injury and property damage caused by wear prematurely.
flying objects. ●● 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
Air supply and operation level. Use only recommended lubricants, specially
■■ Ensure the air valve (or trigger) is in the “off” position made for pneumatic applications. Substitutes
before connecting to the air supply. may harm the rubber compounds in the product's
O-rings and other rubber parts.
■■ Required air pressure of 6.3 bar (90 psi), and an air
flow according to specifications.
IMPORTANT!
■■ Connect the product to the air hose.
See Figure 5.
■■ Place the socket over the subject nut and depress the
trigger to operate the tool. If a filter/regulator/lubricator is not installed on the air
system, air operated tools should be lubricated at least
■■ Press the trigger to operate the product.
once a day or after 2 hours of work with 2 - 6 drops
■■ Turn the direction switch to change the rotational of oil, depending on the work environment, directly
direction of the wrench anvil. through the male fitting in the tool housing.
■■ Do not use any additional force upon the tool.
■■ Do not allow the product to free run for an extended
period of time as this will shorten its life.
LOADING AND OPERATION
■■ Release the start and stop device in the case of an
interruption of the air supply.
■■ Disconnect the product from the air supply before
WARNING
changing accessories or making adjustments. Ensure the air supply is clean and does not exceed 6.3
bar (90 psi) while operating the product. Too high an air
WARNING pressure and unclean air will shorten the product's life
due to excessive wear, and may be dangerous causing
Ensure the air supply is clean and does not exceed damage and/or personal injury.
6.3 bar (90 psi) while operating the product. Too high an
air pressure and unclean air will shorten the product's
■■ Line pressure should be increased to compensate for
life due to excessive wear, and may be dangerous
unusually long air hoses (over 8 metres). The minimum
causing damage and/or personal injury.
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
LUBRICATION hose for wear, and make sure that all connections are
secure.
An automatic in-line filter-regulator-lubricator is
recommended (Fig. 5) as it increases product life and ■■ Do not use a worn or damaged tool or accessory.
keeps the product in sustained operation. The in-line ■■ Loss of power or erratic action may be due to the
lubricator should be regularly checked and filled with air following:
tool oil. –– Excessive drain on the air line. Moisture or
Proper adjustment of the in-line lubricator is performed by restriction in the air pipe. Incorrect size or type of
placing a sheet of paper next to the exhaust ports and hose connectors. To remedy check the air supply.
holding the throttle open for approximately 30 seconds. –– Grit or gum deposits in the tool may also reduce
The lubricator is properly set when a light stain of oil performance. If your model has an air strainer
collects on the paper. Excessive amounts of oil should be (located in the area of the air inlet), remove the
avoided. strainer and clean it.
If it becomes necessary to store the product for an extended ■■ Use the product only for its intended purpose.
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 Maintenance
has been evenly distributed throughout the product. The ■■ Keep the product safe by regular maintenance.
product should be stored in a clean and dry environment.
■■ Always keep your air tool clean and lubricated. Daily
●● It is most important that the product be properly lubrication is essential to avoid internal corrosion and

4
 possible failure. Remedies
■■ Lubricate the product daily with a few drops of air tool ■■ Check air inlet filter for blockage.
oil dripped into the air inlet. ■■ Pour air tool lubricating oil into air inlet as per
■■ Maintenance shall be performed weekly. instructions.
■■ Drain the air tank daily. Water in the air line will ■■ Operate tool in short bursts quickly reversing rotation
damage the product. back and forth where applicable.
■■ If the product cannot be used anymore, make sure to ■■ Repeat above as needed.
dispose of it so as not to impose hazards on people
and the environment. PROBLEM: Tool will not run. Air flows freely from
■■ Air tool white oil is recommended for lubrication. exhaust.
■■ Only lubricants recommended by the manufacturer Possible cause
should be used.
One or more motor vanes are stuck due to material
■■ Clean the air inlet filter weekly. build up.

Remedies
Troubleshooting
■■ Pour air tool lubricating oil into air inlet.
■■ Operate tool in short bursts of forward and/or reverse
WARNING rotation where applicable.
If any of the following symptoms appears during ■■ Tap motor housing gently with a plastic mallet.
operation, stop using the product immediately, or
■■ Disconnect the air supply. Free the motor by rotating
serious personal injury could result. Only qualified
drive shank manually where applicable.
persons or an authorised service centre can perform
repairs or replacement of the product. ■■ If the product remains jammed, return to the service
centre.
Disconnect tool from the air supply before attempting PROBLEM: Tool will not shut off.
repair or adjustment. When replacing O-rings or cylinder,
lubricate with air tool oil before assembly. Possible cause
‘O’ rings throttle valve is dislodged from seat inlet
PROBLEM: Product runs at normal speed but fails
valve.
under load.
RemedY
Possible causes
Replace the ‘O’ ring.
■■ Motor parts are worn.
NOTE: Repairs should be carried out by a qualified
■■ Cam clutch is worn or sticking due to lack of lubricant. person.
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 flows slightly

from exhaust.

Possible causes
■■ Motor parts are jammed with dirt particles.
20161209v2

■■ Air regulator is in closed position.

■■ Air flow is blocked by dirt.

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 Parts list

No. Description No. Description No. Description No. Description

1 Ratchet yoke 13 Thread ring gear 25 Washer 37 Trigger

2 Drive bushing 14 Head socket 26 Direction switch 38 Roll pin

3 Crank shaft 15 Spring 27 Pin 2 x 6 39 Housing

4 Bearing shell 16 Ratchet pin 28 V-shape washer 40 Pin 2 x 18

5 Needle bearing 17 Ratchet pawl 29 Bearing 608Z 41 Air inlet

6 Ratchet housing 18 Steel ball DW=6 30 Front plate 42 Anti-dust cap

7 Clamp nut 19 Steel spring 31 Cylinder 43 Spring

8 Exhaust cover 20 Retaining ring 30 32 Pin 1.5 x 6 44 O-ring 14.5 x 1.8

9 O-ring 37.5 x 2.65 21 Washer 1/2 33 Rotor 45 Gas sealing

10 Idler gear plate 22 Steel ball DW=4 34 Rotot blade 46 Rubber grip

11 Idler gear pin 23 Spring 35 Rear plate 47 Sealed cap

12 Idler gear 24 D-head 3/8" 36 Rear bearing 626Z 48 Air inlet

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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