Clarke CAT70 Installation and operation manual

OPERATING & MAINTENANCE
INSTRUCTIONS
GC0414
HEAVY DUTY BELT SANDER
MODEL NO: CAT70
PART NO: 3110750

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INTRODUCTION
Thank you for purchasing this CLARKE Air Sander.
The CAT70 Sander is ideal for use in garages and workshops. The narrow belt
and adjustable handle allow access in awkward places.
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.
IMPORTANT
Please read all of the safety and operating instructions carefully before using
this product. The following safety symbols are to be found on the packaging.
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.
Wear eye protection Wear dust mask.

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GENERAL SAFETY RULES
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 sander where there are flammable liquids or gases.
USE OF POWER TOOLS
1. Stay alert and use common sense - do not operate the tool when you are
tired or under the influence of alcohol, drugs or medication.
2. Always wear eye protectors when using the sander. Eye protectors must
provide protection from flying particles from the front and the side. Ear
protectors should also be worn.
3. Do not overreach - Keep proper footing and balance at all times.
4. Never use oxygen, CO2, combustible gasses or any type of bottled gas as
a source of power for this tool.
5. Do not connect the air supply hose with your finger on the trigger.
6. Do not exceed the maximum pressure for the tool of 90 psi / 6.2 bar.
7. Check hoses for leaks or worn condition before use, and ensure that all
connections are secure.
8. Keep the air supply hose away from heat, oil and sharp edges.
9. Do not use the tool for any purpose than that described in this manual.
10. Do not fit the tool to any stand or clamping device that may damage it.
11. Do not carry out any alterations or modifications to the tool.
12. Always disconnect from the air supply when:
• Performing any maintenance
• The tool is not in use.
• The tool will be left unattended.
CAUTION: FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN
PERSONAL INJURY, AND/OR DAMAGE TO PROPERTY.

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• Moving to another work area.
• Passing the tool to another person.
13. Never use the tool if it is defective or operating abnormally.
14. This tool should be serviced at regular intervals by qualified personnel.
15. Avoid damaging the tool by applying excessive force of any kind.
16. Always maintain the tool with care. Keep it clean for the best and safest
performance.
17. Quick change couplings should not be located at the tool. They add
weight and could fail due to vibration.
18. DO NOT force or misuse the tool. It will do a better and safer job at the rate
for which it was designed.
19. Do not remove any labels. Damaged labels should be replaced.
20. 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.
SANDER-SPECIFIC SAFETY RULES
1. Inspect the sanding belt before use. Do not use if frayed.
2. Avoid contact with the moving sanding belt and wear suitable gloves to
protect the hands.
3. Never run the tool unless the abrasive belt is applied to the workpiece.
4. Beware of potentially explosive atmospheres being caused by dust / fumes
resulting from sanding and used dust extraction systems where possible.
5. Always wear a face mask when using the sander as protection from
airborne particles of sanded material. Avoid disturbing existing dust and
minimise the scattering of dust in the workplace environment. Take steps to
control the dust at the point of emission.
TRANSPORT & STORAGE
1. Never carry the tool by the air hose.
2. Never carry the tool with your finger on the trigger.
3. When not in use the tool must be disconnected from the air supply and
stored in a dry place out of the reach of children (preferably in a locked
cabinet).
4. Avoid storing the tool where the temperature is below 0oC.

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OVERVIEW
When unpacking the tool, any damage or deficiency should be reported to
your CLARKE dealer immediately. The carton contains:
•Sander
• 80 and 100 grit sanding belts
• Allen key
Your sander has been designed to give long and trouble free service. If,
however, having followed the instructions in this booklet carefully, you
encounter problems, take the unit to your local CLARKE dealer.
NO DESCRIPTION NO DESCRIPTION
1 Idle Pulley 5 Airline Connector
2 Tracking Screw (Allen Key fitted) 6 Dust Guard
3 Finger Pad 7 Throttle Lever
4 Adjustable Handle 8 Tension Bar Release Button

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COMPRESSED AIR REQUIREMENTS
• Use only clean, dry, regulated compressed air as a power source.
• Air compressors used with the tool 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 tool. 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. clarke airline oil should
be used, and the lubricator adjusted to approx 2 drops per minute.
• For optimum performance it is recommended that a 3/8” ID hose is
used.
• 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 dirty air will shorten
the life of the tool due to faster wear and is a possible safety hazard.
WARNING: COMPRESSED AIR CAN BE DANGEROUS. ENSURE THAT YOU
ARE FAMILIAR WITH ALL PRECAUTIONS RELATING TO THE USE OF
COMPRESSORS AND COMPRESSED AIR SUPPLY.

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BEFORE USE
CONNECTING THE AIR SUPPLY
1. Pour 2-3 drops of CLARKE airline oil into the air inlet. This should be done
regardless of whether or not a lubricated air supply is to be used.
2. Connect a suitable hose to the
tool as shown using the airline
connector supplied with the tool.
3. 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.
4. 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 inlet strainer or via the hose at
the nearest connection to the air supply.
5. Connect the other end of the hose to the compressor.
6. Turn on the air supply and check for air leaks. Rectify any found before
proceeding. PTFE tape may be useful for sealing threaded connections.
7. 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.)
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.

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INSTALLING THE BELT
1. To replace sanding belt, push the idler pulley assembly (Item 2) towards the
handle until it clicks into the secured position. Replace the belt and press
the tension bar (item 14), to re-tension the belt (see Fig 1
2. To track the belt, adjust as required with screw and locknut (2A in Fig 1).
3. To adjust the handle position, slacken the screw (item 11), rotate the
handle to the required position. (Only as far as A or B), then secure by re-
tightening the screw (item 11).
4. Connect to the airline and turn the air on.
5. Ensure your fingers are clear of the sanding belt. Squeeze the throttle lever
to start the motor. Allow the motor to reach max speed before offering the
belt to the workpiece.
6. Do not use the finger pad (Item 4) to exert pressure on the belt; this item is
only for guiding the tool.
7. When finished sanding, release the throttle lever and allow the motor to
stop before carefully putting the tool down.
•Only use sanding belts designed for use with this type of sander
OPERATING
1. Squeeze the trigger against the body of the tool to start the sander and
control the speed. Evaluate the speed and adjust to suit.
2. To begin work, rest the belt on the workpiece and start the sander.

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• Let the tool do the work. The actual weight of the machine is
normally sufficient for efficient sanding. Do not put additional
pressure on the machine, which would only slow down the speed of
the belt, reducing efficiency and placing an additional burden on
the motor.
3. Pass the sander back and forth, taking care to keep the sander moving
around at all times. Avoid dwelling in one place for more than a moment.
4. Release the trigger to stop the tool.
5. Always ensure the tool has stopped before putting it down.
DISCONNECTING THE AIR SUPPLY
1. Do not disconnect the air supply hose until the compressor has been shut
down and the compressed air released.
2. Refer to the compressor instruction manual for the procedure to shut down
and vent the compressed air.
3. Once the pressure has been released, disconnect the air supply hose from
the air tool.
MAINTENANCE
DAILY
1. Before use, drain water from the airline filter and compressor.
2. Pour a few drops of Clarke air-line oil, into the tool air inlet. This should be
carried out regardless of whether or not an in-line mini oiler is used. If an in-
line mini oiler is not used, this procedure should be repeated after every
two to three hours of use.
3. 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.
2. Grit or gum deposits in the tool may also reduce efficiency. This condition
can be corrected by cleaning the air strainer and flushing out the tool with
WARNING: MAKE SURE THAT THE AIR TOOL IS DISCONNECTED FROM THE
AIR SUPPLY BEFORE STARTING ANY CLEANING OR MAINTENANCE
PROCEDURES.

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gum solvent oil, or failing this, the tool should be disassembled, thoroughly
cleaned, dried and reassembled. This is better left to your Clarke dealer.
3. After extensive use, remove the
inlet screen filter and flush out the
mechanism with gum solvent oil or
an equal mixture of Clarke air-line
oil and paraffin. Allow to dry
before use.
4. f the tool runs erratically or
becomes inefficient, and the air
supply is of good quality, it may be
necessary to dismantle the air
motor and replace worn or
damaged parts. You may prefer to take the tool to your Clarke dealer if
internal maintenance is required.
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.
**Clarke Air Line Oil (part no. 3050825) is available from your Clarke dealer.
Your Clarke air tool has been designed to give long and trouble free service. If,
however, having followed the instructions in this booklet carefully, you
encounter problems, take the unit to your local Clarke dealer.
STORAGE
When not in use, disconnect from air supply, clean & store in a safe, dry place.
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.
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.
ABRASIVE BELTS
Replacement abrasive belts are available from your CLARKE dealer:
60 grit (pack of 5) Part no. 3110751
80 grit (pack of 5) Part no. 3110752

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TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION
Tool runs at normal
speed but slows down
under any load.
1. Motor parts worn.
2. Worn or sticking
mechanism due to
lack of lubricant.
1. Return to Clarke dealer
for repair.
2. Drip air tool lubricating
oil into air inlet. Allow oil
to soak moving parts
before using.
Tool runs slowly. Air flows
weakly from exhaust.
1. Motor parts jammed
with gum/dirt.
2. Air-line regulator in
closed position.
3. General airflow
blocked by dirt.
1. Examine inlet air filter for
blockage. Drip a few
drops of air tool lubricat-
ing oil into air inlet.
2. Adjust in-line regulator to
open position.
3. Operate tool in short
bursts.
Tool will not run. Air flows
freely from exhaust.
1. Motor vanes stuck
due to buildup of
foreign material.
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. Throttle O-rings
damaged or ill-fitting
in seat.
1. Return to Clarke dealer
for repair.

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PARTS LIST
When requesting replacement parts, please quote part ref; KL0707001 to
KL0707040.
No Description No Description
1 Idle Pulley Arm Assy 20 End Plate B
2 Idle Pulley Assy 21 Spacer 10 x 13 x 3
2A Socket Head Bolt 5x28 22 Sunk Key 2x2.5x 10
2B Washer 23 Cap
2C Circlip 24 Bearing 626ZZ
3 Spring 25 End Plate A
4 Finger Pad Assy 26 Cylinder
5 Key Bolt Assy 27 Blade Set
6 Socket Head Bolt 5x12 28 Rotor
7 Sanding Belt 29 Throttle Lever
8 Socket Head Bolt 6x16 30 Lever Hinge Pin
8A Washer 31 Valve Body
9 Drive Pulley 32 O-Ring
10 Flat Shoe 33 O-Ring
11 Socket Head Bolt 5x118 34 O-Ring
12 Dust Guard 35 Valve Stem
13 Guard Body 36 O-Ring
14 Tension Bar 37 Valve Spring
15 Spring 38 Exhuast Deflector
16 Lever Pin 39 Air Inlet
17 Lever Pin 40 Hex Key 4mm
18 Main Housing 7 Sanding Belt 80 grit
19 Ball Bearing EE3 7 Sanding Belt 100 grit

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PARTS DIAGRAM

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SPECIFICATION
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.
Model Number CAT70
Part Number 3110750
Min. Hose Size (ID) 1/4” BSP
Max Operating Pressure 90 psi (6.2 bar)
Air Consumption 17 cfm (max) / nominal 12 cfm
Belt Speed 1500 m/min @ 90psi
Air Inlet Size 1/4“BSP
Sound Pressure Level (LpA dB) 99 dB(A)
Sound Power Level (LwA dB) 88 dB(A)
Uncertainty Factor 3 dB
Vibration Levels 0.58 m/s2 (uncertainty factor K= 1.5 m/s2)
Weight 1.2 kg
Sanding Belt Size 20 mm x 520 mm

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DECLARATION OF CONFORMITY