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3/8”REVERSIBLE AIR DRILL
MODEL NO: CAT137
PART NO: 3120151
OPERATING & MAINTENANCE
INSTRUCTIONS
ORIGINAL INSTRUCTIONS GC06/22 - Rev 2
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INTRODUCTION
Thank you for purchasing this CLARKE Reversible Air Drill.
Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.
MPORTANT
Please read all of the safety and operating instructions carefully before using
this product. The following safety symbols are to be found on the machine.
Read this instruction
booklet carefully
before use.
Wear eye protection Wear dust mask .
Wear ear protection
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.
This guarantee does not effect your statutory rights.
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GENERAL SAFETY RULES
CAUTION: FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN
PERSONAL INJURY, AND/OR DAMAGE TO PROPERTY.
WORK ENVIRONMENT
1. Keep the work area clean and tidy.
2. Dress appropriately - Do not wear loose clothing or jewellery. Tie long hair
out of the way.
3. Keep children and visitors away - Do not let children handle the tool.
4. Do not operate the tool where there are flammable liquids or gases.
USE OF POWER TOOLS
1. Stay alert and use common sense - do not operate the drill when you are
tired or under the influence of alcohol, drugs or medication.
2. Always wear eye protectors when using the drill - Eye protectors must
provide protection from flying particles from the front and the side.
3. Always wear ear protectors when using the drill.
4. Do not overreach - Keep proper footing and balance at all times.
5. Never use any type of bottled gas as a source of power for the drill.
6. Do not connect the air supply hose with your finger on the trigger of the
drill.
7. Do not exceed the maximum pressure for the drill 90 psi / 6.2 bar.
8. Check hoses for leaks or worn condition before use, and ensure that all
connections are secure.
9. Keep the air supply hose away from heat, oil and sharp edges.
10. Do not use the tool for any other purpose than that described in this
manual.
11. Do not fit the tool to any stand or clamping device that may damage it.
12. Do not carry out any alterations or modifications to the tool.
13. Always disconnect from the air supply when:
• Performing any maintenance
• The drill is not in use.
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• The drill will be left unattended.
• Moving to another work area.
• Passing the drill to another person.
14. Never use the tool if it is defective or operating abnormally.
15. The drill should be serviced at regular intervals by qualified service
personnel.
16. Avoid damaging the drill for example by applying excessive force of any
kind.
17. ALWAYS maintain the tool with care. Keep it clean for the best and safest
performance.
18. Quick change couplings should not be located at the tool. They add
weight and could fail due to vibration.
19. Do not force or misuse the tool. It will do a better and safer job at the rate
for which it was designed.
20. Do not remove any labels. Damaged labels should be replaced.
21. This tool vibrates with use. Vibration may be harmful to your hands or arms.
Stop using the tool if discomfort, a tingling feeling or pain occurs. Seek
medical advice before resuming use.
TRANSPORTATION
1. Never carry the drill by the air supply hose.
2. Never carry the drill with your finger on the trigger.
STORAGE
1. When not in use the drill must be disconnected from the air supply and
stored in a dry place out of the reach of children (preferably in a locked
cabinet).
o
2. Avoid storing the drill in environments where the temperature is below 0
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OVERVIEW
NO DESCRIPTION NO DESCRIPTION
1 Chuck 4 Forward/Reverse Switch
2 Trigger 5 1/4” BSP female air inlet
3 Auxiliary Handle
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THE COMPRESSED AIR SUPPLY
AIR SUPPLY REQUIREMENTS
WARNING: COMPRESSED AIR CAN BE DANGEROUS. ENSURE THAT YOU
ARE FAMILIAR WITH ALL PRECAUTIONS RELATING TO THE USE OF
COMPRESSORS AND COMPRESSED AIR SUPPLY.
• Use only clean, dry, regulated compressed air as a power source.
• Air compressors used with the impact wrench must comply with the
appropriate European Community Safety Directives.
• A build-up of moisture or oil in the air compressor will accelerate
wear and corrosion in the impact wrench. ensure any moisture is
drained from the compressor daily and the inlet filter is kept clean.
• If an unusually long air hose is required, (over 8 metres), the line
pressure or the hose inside diameter may need to be increased.
• The air hose must be rated at least 150% of the maximum operating
pressure of the tool.
• A typical air line layout is shown above. If an automatic in-line filter/
regulator is used, it will keep the tool in good condition, but should
be regularly checked and topped up with oil. SAE 10 oil should be
used, and the lubricator adjusted to approx 2 drops per minute.
• The minimum hose diameter should be 5/16”(8mm) ID and fittings
should have the same internal dimensions.
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• Never exceed the maximum operating pressure for the tool. It is
recommended that air pressure to this tool does not exceed 90 psi
at the tool when running. Higher pressures and unclean air will
shorten the life of the tool due to faster wear and is a possible safety
hazard.
BEFORE USE
WARNING: COMPRESSED AIR CAN BE DANGEROUS. ENSURE THAT YOU
ARE FAMILIAR WITH ALL PRECAUTIONS RELATING TO THE USE OF AIR
COMPRESSORS AND COMPRESSED AIR SUPPLY.
NOTE: Ensure the air supply is turned off.
1. If required, connect an in-line mini oiler to the tool.
• A mini oiler helps to prolong the life of the air tool. Remove the oil fill
screw from the side of the mini oiler and fill with Air-line Oil available
from your CLARKE dealer. Replace the screw before using the tool.
2. If a mini-oiler is not being used, run a few drops of oil through the tool
before use. It can be entered through the air inlet.
3. Connect a suitable hose to the
female air inlet as shown.
4. Connect the other end of the hose
to the air supply.
5. Turn on the air supply and check
for air leaks.
• Rectify any found before
proceeding.
Your air tool is now ready for use.
You can fit a whip hose with a quick fit coupling if required (available from
your Clarke dealer.)
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FITTING THE HANDLE
The CAT137 is supplied with an
auxiliary handle. To install it proceed
as follows.
1. Slide the clamping ring over the
body of the drill., ensuring it rests
on the flat shoulder provided.
2. Screw the handle onto the
threaded part of the clamping ring
until the handle assembly is tight.
• The handle can be located at
any position around the drill by loosening the handle grip and
adjusting the position.
INSERTING/REMOVING THE DRILL BIT
1. Open the chuck jaws by gripping
the lower part of the chuck and
turning the upper part counterclockwise by hand.
• The direction of twist is
embossed on the upper chuck
body.
2. Place the drill bit in the jaws of the
chuck as far as it will go.
3. Close the chuck jaws and tighten
to grip the drill bit by turning the upper chuck clockwise by hand while
holding the lower part.
4. Make sure that the chuck jaws are fully closed and that the drill bit is held
firmly.
5. Your air drill is now ready for use.
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OPERATION
OPERATING THE AIR DRILL
1. Squeeze the trigger to start the
drill.
2. Release the trigger to stop the drill.
3. To change the direction of rotation
move the lever behind the trigger
from F to R.
4. Always ensure the drill has stopped
before putting it down.
DISCONNECTING THE AIR SUPPLY
Do not disconnect the air supply hose until the air supply has been shut down
and the compressed air released.
1. Refer to the compressor instruction manual for the procedure to shut down
and release the compressed air.
2. Once the pressure has been released, disconnect the air supply hose from
the air drill.
Store the tool safely in its box in a dry, secure environment.
MAINTENANCE
WARNING: MAKE SURE THAT THE DRILL IS DISCONNECTED FROM THE AIR
SUPPLY BEFORE STARTING ANY CLEANING, OR MAINTENANCE
PROCEDURES.
DAILY
1. Before use, drain water from the compressed air supply.
2. Pour a few drops of CLARKE airline oil, into the air inlet. This should be
carried out regardless of whether or not an in-line mini oiler is used. If an
inline mini oiler is not used, this procedure should be repeated after every
two to three hours of use.
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WEEKLY
1. Check the air inlet screen filter for
blockage and clean if necessary.
CLEANING
1. Keep the body of the tool clean
and free from debris. Grit or gum
deposits in the tool may reduce
efficiency.
SERVICE AND REPAIR
If the tool runs erratically or becomes inefficient although the air supply is in
good order, it may be necessary to dismantle the tool. Such servicing and
repair work should be carried out by qualified service technicians.
PERFORMANCE
Please note that factors other than the tool may effect its operation and
efficiency such as reduced compressor output, excessive drain on the airline
moisture or restrictions in the air-line, or the use of connectors of improper size
or poor condition which will reduce air supply.
Grit or gum deposits inside the tool may also reduce its efficiency. This
condition can be corrected by cleaning out the air strainer and flushing out
the tool with gum solvent or oil, or failing this, the motor may require
dismantling.
**Clarke Air Line Oil (part no. 3050825) is available from your CLARKE dealer.
STORAGE
If the tool is to be stored, or is idle for longer than 24 hours, run a few drops of
Clarke air line oil into the air inlet, and run the tool for 5 seconds in order to
lubricate the internal parts.
When not in use, disconnect from air supply, clean tool and store in a safe, dry
place.
ACCESSORIES
A wide range of accessories is available including filter/regulators, lubricators,
high-pressure hoses (5 to 50 metres) etc.
Contact your CLARKE dealer for further information or CLARKE International
Service Department on 01992 565333.
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TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION
Tool runs at nor mal
speed but slows down
under any load.
Tool runs slowly. Air flows
weakly from exhaust.
Tool will not run. Air flows
freely from exhaust.
1. Excessive pressure on
drill.
2. Motor parts worn.
3. Worn or sticking
mechanism due to
lack of lubricant.
1. Motor parts jammed
with gum/dirt.
2. Regulator in closed
position.
3. General airflow
blocked by dirt.
1. Motor vanes stuck
due to buildup of
foreign material.
1. Reduce the force
applied to the drill.
2. Return to Clarke dealer
for repair.
3. Drip air tool lubricating
oil into air inlet. Allow oil
to soak moving parts
before using.
1. Examine inlet air filter for
cleanliness.
2. Adjust regulator to open
position.
3. Operate tool in short
bursts.
1. Disconnect air supply
and rotate tool assembly
manually.
2. Try operating tool in
short bursts.
3. Tap motor housing gently
with a rubber mallet.
4. Drip a few drops of air
tool lubricating oil into air
inlet to soak moving
parts.
Tool will not shut off. 1. O-rings damaged or
ill-fitting in seat.
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1. Return to Clarke dealer
for repair.
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PARTS LIST
No Description No Description
1 Housing 24 Rear Plate
2 Housing Cover 25 Rotor
3 Screw 26 Rotor Blade
4 End Cover 27 Cylinder
5 Pin 28 Pin
6 Soft Grip - Rear 29 Front Plate
7 Soft Grip - Front 30 Washer
8 Muffler 31 Bearing
9 Screw 32 Bearing
10 O-Ring 33 Gear
11 Air Inlet 34 Pin
12 O-Ring 35 Spindle
13 O-Ring 36 Thread Gear Ring
14 Valve Stem 37 Bearing
15 O-Ring 38 Clamp Nut
16 Screw 39 Washer
17 Forward/Reverse Lever 40 Chuck
18 Steel Plate 41 Screw
19 Spring 42 Copper Ring
20 Screw 43 Auxiliary Handle
21 Trigger 44 Soft Grip
22 Cylinder Gasket 45 Trigger Nut
23 Bearing 46 Trigger Spring
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SPECIFICATION
Model Numbers CAT137
Part Number 3120151
Min. Hose Size (ID) 8 mm (5/16”)
Chuck Size 1.5 - 10 mm (3/8”)
Operating Pressure 90 psi (6.2 bar)
Air Consumption 16 cfm (max load)
No Load Speed 2200 rpm @ 90psi
Air Inlet Size 1/4“ BSP Female
Sound Pressure Level (LpA dB) 87 dB(A)
Sound Power Level (LwA dB) 98 dB(A)
Vibration Levels
Vibration Uncertainty K 1.5
Weight 1.3 kg
Please note that the details and specifications contained herein are correct
at the time of going to print. However CLARKE International reserve the right to
change specifications at any time without prior notice. Always consult the
machine’s data plate.
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1.0 m/s
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DECLARATION OF CONFORMITY
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