Clarke JSC, 3090065 User guide

SPRAY GUN

SPRAY GUN

MODEL NO: JSC

PART No: 3090065

OPERATION & MAINTENANCE

INSTRUCTIONS

0903

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NOTES

Please read these instructions carefully before operating the tool

Thank you for purchasing this
Before using the device, please read this manual thoroughly and carefully. Follow
all instructions given. This is for your own safety and that of others around you, and
is also to help you achieve long and trouble free service from your new spray gun.

CLARKE

JSC Spray Gun.

CLARKE GUARANTEE

This CLARKE product is guaranteed against faulty manufacture for a period
of 12 months from the date of purchase. Please keep your receipt 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 affect your statutory rights.

Please be aware that certain parts of this spray gun will wear, requiring replacement and
that these parts may not be covered by your guarantee.

The wear on certain parts depends on the abrasiveness of the materials being sprayed.
More abrasive materials such as latex paint (emulsions) will cause these parts to wear
much faster .

Replacement parts are available from your nearest Clarke International dealer.

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PARTS & SERVICE TEL: [phone]

or e-mail as follows:

PARTS: [e-mail]

SERVICE: [e-mail]

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SPECIFICATIONS

JSC SPRAY GUNS

Spray guns with external paint mix and 1 litre syphon cup for cellulose, enamels,
polyurethane, acrylics, metallics and all similar viscosity finishes

SPECIFICA TIONS

PSC

Part No :.................................... 3090065

V essel Capacity :.................... 1 Litre

Air Consumption :.................... 2.0cfm

Air Inlet Connector :............... ¼ BSP

Nozzle :...................................... 1.3mm

CONTENTS page

Guarantee 2
Safety Precautions 4
General Arrangement 5
Air Supply 5
Using The Spraygun 6
Maintenance 7
Paint Spraying Hints 8 / 9
Parts List 11 / 12

PARTS LIST

No DESCRIPTION P ART NUMBER Qty

1 Knurled Locking Ring NS106RB1199 1

2 Fan Nozzle NS206RB39 1
3 Liquid Nozzle NS165RB1130R 1
4 Gun Frame And Trigger Assy NS032RB163A 1
5 Plug NS118RB6327 1
6 Needle Pin Assy NS060RB127A 1
7 Needle Pin Spring NS04RB1197 1
8 Friction Washer NS072RB1198 1

9 Air Bypass Valve NS167RB1195 1
10 Trigger Adjustment Screw NS105RB1127 1
11 Liquid Tube NS013RB239 1
12 Packing NS165RB5 1
13 Packing Screw NS098RB1304 1
14 O Ring Cup Cover NS165RB2309 1
15 Paint Strainer NS213RB2355 1
16 Cup Cover NS006RB1215 1
17 Cup Cover Gasket NS165RB1130R 1
18 Cup Cover Nut NS106RB24 1
19 Cup NS007RB1131 1

# Spanner (Not Shown) NS206RB40 1

# Round Nozzle (Not Shown) NS206RB41) 1

# Air Hose Joint Set (Not Shown) NS206RB42 1

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.

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IMPORTANT:

T

he use of parts other than CLARKE replacement parts may result in safety hazards,

decreased tool performance and may invalidate your warranty.

PARTS DIAGRAM

SAFETY PRECAUTIONS

WARNING

Compressed air can be

dangerous. Ensure that you are

thoroughly familiar with all
precautions relating to the use of
compressors and compressed air

supply.

For your personal safety and that of others around you. Follow

these safety instructions carefully.

NOTE :

products used in this spray gun may be covered by COSHH Regulations.



AL WAYS

any particular hazards, and follow the manufacturers instructions. Take particular
care if spraying isocyanate paints.



ALWAYS

inhalation of paint spray or fumes. An air feed mask may be required when spraying
some types of paint. If in doubt, check with the paint manufacturer.



ALWAYS

areas.

check the manufacturers data sheets on the products being sprayed for

wear a suitable approved breathing mask when spraying, to protect against

make sure there is adequate ventilation. Do not spray in confined or enclosed

PARTS & SERVICE TEL: [phone]

or e-mail as follows:

PARTS: [e-mail]

SERVICE: [e-mail]

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

AL WAYS

any disassembly.



AL WAYS



ALWAYS



NEVER

medical advice immediately.



NEVER

heat source. Many paints are flammable.



NEVER



NEVER

trichloroethane or methylene chloride) with this gun as they can react chemically
with aluminium or zinc to produce an explosion hazard.



NEVER

disconnect the spray gun from the air supply when it is not in use, and before

keep the spray nozzle in place when spraying.

thoroughly clean the spray gun after use. See Maintenance

spray paint towards people or animals. In the case of injury, seek expert

smoke while spraying or preparing paints, or spray near a naked flame or

allow children to use or play with this appliance.

spray products containing halogenated hydrocarbons (such as

exceed the maximum input air pressure of 50 psi (3.5 bar).

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GENERAL ARRANGEMENT

Knurled Locking Ring

NOTES

Spray Nozzle

Trigger

Paint Cup

Fluid Control

Air Supply

AIR SUPPLY

JSC spray guns are available with one nozzle size, 1.3mm. Ensure your spray gun is matched
to the capacity of your compressor.

Model Nozzle size Compressor required

JSC 1.3 mm 0.75 Hp and above

For best results, the air supply to the spray gun must be clean and dry, with no oil or water
contamination. Follow the air compressor manufacturers guidelines on installation and
operation to ensure that your air supply is as clean as possible. The compressed air supply
line to the spray gun must be fitted with an oil and water extractor and a suitable
pressure regulator.

Connect the air supply to the spray gun using a suitable 1/4 BSP fitting.

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PAINT SPRAYING HINTS Cont

USING THE SPRAYGUN

To obtain best results, it is vital that the surface to be sprayed is well prepared. It must be
clean, free from dust, dirt and grease. Mask any area that is not to be sprayed.

Paint Thinning

Thinning is particularly important when paint spraying. Most paints are supplied ready for
brush application and need to be sufficiently diluted for spraying purposes. Always follow
the paint manufacturers instructions. If in doubt, always consult the paint manufacturer.

A Viscous Cup (not supplied), will assist in determining the correct thickness of the paint.
Ensure the paint is free from lumps or other
matter , if necessary strain it through a coarse
filter.

The ideal viscosity for most paints is given in
the chart opposite.

Dip the cup into the paint and fill to the
brim. Time how long it takes for the cup to
empty.

Water based paints ..... 35 - 45 secs

Oil based paints .......... 15 - 25 secs

Enamel paints .............. 15 - 25 secs

Primers .................. ........ 20 - 30 secs

V arnishes..................... .20 - 25 secs

Aluminium paints ........ 15 - 25 secs

Wood preservatives .... Do Not Dilute

Wood Stains.................. Do Not Dilute

Smooth Masonry paint....dilute by 5 - 10%

Thin as required until times are achieved

Alternatively if a viscous cup is not available, the following information can be used
as a rough guide.

Water based paints (emulsions) 10-20% water.

Oil based paints (gloss) up to 10% thinners.

Cellulose paints up to 50 % cellulose thinners.

IF IN ANY DOUBT, CONT ACT THE PAINT MANUFACTURER

JSC spray guns are fed with paint by a siphon (or suction) effect from the paint cup. The
air flow through the air cap draws paint up the feed tube, into the nozzle assembly,
where it is atomised and sprayed forward.

Mix the paint to the correct viscosity for spraying according to the manufacturers
instructions, and strain it into the paint cup through a fine mesh filter. When mixing the
paint, make sure that you have enough thinners left to clean the spray gun after use.

Do not fill the paint cup to more than 3/4 full. Make sure that the top edge of the cup and
the cup sealing gasket are clean and free from damage before mounting the cup on
the gun. The cup locking lever must be tightened firmly to prevent any leaks from around
the cup rim.

Set the fluid flow using the adjustment screw on the spray gun. The spray pattern is
variable between round and fan by adjusting the air flow through the air cap. The fan
can be adjusted vertically or horizontally to suit your requirements by loosening the
knurled locking ring and turning the spray nozzle to the desired position. Set the fluid flow
according to the paint in use and the spray pattern by using the fluid control screw;
anticlockwise to increase, and clockwise to reduce flow. As the width of the spray is
increased, fluid flow will also need to be increased.

The air pressure needed will vary according to the paint in use, with thicker paints needing
greater pressure. For most paints, a pressure of between 1.5 and 3.5 bar (approximately
20 - 50 psi) is adequate.

To reduce overspray and to obtain maximum transfer efficiency, always use the lowest
possible air inlet pressure that produces an acceptable spray pattern.

The first requirement for a good resultant finish is the proper handling of the gun. The
gun should be perpendicular to the surface being covered and moved parallel with
it. The stroke should be started before the trigger is pulled and likewise , released
before the stroke is ended. This gives accurate control of the gun and material.

The distance between the gun and the surface to be covered should be 6 to 12 inches
depending on the material and atomising pressure. The material deposited should always
be even and wet. Lap each stroke over the preceding stroke to obtain a uniform finish.

NOTE: To reduce overspray and obtain maximum efficiency, always spray with the lowest
possible atomising air pressure.

Damage to the fluid needle or nozzle, or any of the air ports, will result in a faulty spray
pattern. Take care when cleaning or assembling these components.

When spraying, the gun should be held square to the surface being painted, at a
distance of 6 to 12 inches depending on the paint and atomising pressure. Keep the gun
parallel to the surface being sprayed, starting the stroke before pulling the trigger, and
releasing the trigger before ending the stroke. Overlap each stroke over the preceding
stroke to obtain an even finish. The paint cover should be even and wet when spraying.

If the gun is too far from the surface, or the paint is too thin, the paint will dry before hitting
the work, resulting in a rough, sandy finish. Allowing overspray to fall on a finished area will
also result in a rough finish. Too much paint feed or holding the gun too close to the work
will lead to runs and sagging.

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MAINTENANCE

WARNING

Disconnect the spray gun from the air supply, and relieve any pressure in the
gun and hose, before any disassembly.

It is essential that the spray gun is kept clean. Dried paint in the nozzle assembly or airways
will stop the gun from working. For the gun to perform at its best it must be cleaned and
lubricated after every use.

After use, empty any remaining paint from the paint cup, wipe the cup clean with a dry,
lint free rag, and fill with thinners. Spray the thinners through the spray gun until it is clean.

1. Immerse only the front end of the gun until solvent just covers the fluid connection.
NOTE : do not submerge the entire spray gun in solvent because :

a, the lubricant in the leather packings will dissolve and the packings will dry out.
b, the lubricant at wear surfaces will dissolve resulting in harder operation and

premature wear.

c, residue from dirty solvent may clog the narrow air passages in the gun.

2. Use a small bristle brush and solvent to wash off accumulated paint.

3. Wipe down the outside of the gun with solvent dampened cloth.

4. Lubricate gun daily, using a light machine oil on :

fluid needle packing

a,

b, air valve packing
c, side port control packing
d, trigger pivot point

Coat the fluid control spring with vaseline.

CAUTION :

DO NOT poke any of the holes in the air cap or nozzle with metal instruments. These holes
are precision drilled, and can be damaged by probing with anything harder than a
wooden toothpick.

Make sure that the air inlet vent to the paint cup is kept clean. Blockages in this vent will
prevent an even material flow to the gun.

Do not mix components from spray guns, even those of the same type. Do not overtighten
components, and be careful not to cross thread any parts on assembly.

Check the air supply hose regularly for any signs of damage, and replace it if necessary.
Do not use damaged or leaking hoses.

never use silicon based lubricants as this may cause paint finish defects.

PAINT SPRAYING HINTS

WARNING

NEVER attempt to spray unless you are wearing suitable, approved

respiratory and eye protection.

REMEMBER that some modern paints require specialist respiratory

protection...always consult the paint manufacturers instructions.

1. General Preparation

a. Ensure that the area in which you will be spraying is clean and dust free.
b. Connect spray gun to compressor via suitable flexible hose.
c. With no paint in spray gun, test system for air leaks.
d. Cover adjacent pieces of equipment to prevent overspray. Mask areas

of the article not to be sprayed.

e. Ensure surface to be painted is clean, dry and free from oil and dust.

Check paint manufacturers instructions for any special surface
preparation required.

REMEMBER - TIME SPENT PREPARING SAVES TIME SPENT FINISHING

2. Paint Preparation

a. Achieve the correct paint viscosity. This should be done according to

paint manufacturers instructions, and will vary according to type of paint, (see
paint thinning on page 9).

b. Having mixed the paint thoroughly in a separate container, pour into the

spray gun paint container through a fine filter.
DO NOT OVERFILL SPRAY GUN PAINT CONTAINER - three quarters full is maximum
c. It is usually best to experiment with a couple of practice spray coats on a

piece of material with the same type of surface as the article you wish to

spray, eg. metal for a car body panel, wood for a piece of furniture etc.
d. Some common problems:

PROBLEM CAUSE CORRECTION

Paint does not atomise Paint is too thick. Add thinners.
(comes out in blobs). Air pressure is too low. Increase air pressure.

Paint dries before hitting Paint is too thin. Add more paint.
surface, leaving it dry Air pressure is too high. Reduce air pressure.
with a rough texture.

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Finish is pitted like Air pressure too high Reduce air pressure,
Orange peel. or spray too close to increase distance between

work. gun and work.

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