Clarke PRO12C, PRO14C, PRO18C Operation & Maintenance Instructions Manual

OPERATION & MAINTENANCE

INSTRUCTIONS

0903

MODEL NO: PRO12C/PRO14C/PRO18C

PART No: 3090005/3090010/3090015

SPRAY GUN

SPRAY GUN

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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 read these instructions carefully before operating the tool

Thank you for purchasing this

CLARKE

Pro Gun.
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.

PARTS & SERVICE TEL: [phone]

or e-mail as follows:

PARTS: [e-mail]

SERVICE: [e-mail]

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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NOTES

SPECIFICATIONS

Part No :....................................... 3090005 3090010 3090015

Cup Capacity :.......................... 1 Litre 1 Litre 1 Litre

Air Consumption :...................... 8.0 CFM 8.5 CFM 9.75 CFM

Air Inlet Connector :................. 1/4 BSP 1/4 BSP 1/4 BSP

Nozzle :........................................ 1.2mm 1.4mm 1.8mm

Operating Pressure :................. 20 - 50 PSI 20 - 50 PSI 20 - 50 PSI

Maximum Pressure :.................. 70 PSI 70 PSI 70 PSI

Fluid Connector:....................... 3/8 BSP 3/8 BSP 3/8 BSP

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.

PRO SPRAY GUNS

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

PRO-12C PRO-14C PRO-18C

PARTS LIST

No DESCRIPTION PRO12C PRO14C PRO18C Qty

PART NUMBER

1 Air Cap Set NSPRO12C01 NSPRO14C01 NSPRO18C01 1
2 Fluid Nozzle NSPRO12C02 NSPRO14C02 NSPRO18C02 1
3 Needle Valve Packing NSPRO12C03 NSPRO12C03 NSPRO12C03 1
4 Vale Packing Seat NSPRO12C04 NSPRO12C04 NSPRO12C04 1

5 Spreader Adj valve Set NSPRO12C05 NSPRO12C05 NSPRO12C05 1
5a Spreader Adj Knob NSPRO12C05a NSPRO12C05a NSPRO12C05a 2
5b Housing NSPRO12C05b NSPRO12C05b NSPRO12C05b 2
5c O Ring NSPRO12C05c NSPRO12C05c NSPRO12C05c 2
5d Brass Washer NSPRO12C05d NSPRO12C05d NSPRO12C05d 2
5e Spring NSPRO12C05e NSPRO12C05e NSPRO12C05e 1

5f Stem NSPRO12C05f NSPRO12C05f NSPRO12C05f 1

7 Needle Valve Guide NSPRO12C07 NSPRO12C07 NSPRO12C07 1

8 Fluid Adj Screw NSPRO12C08 NSPRO12C08 NSPRO12C08 1

9 Needle Valve Spring NSPRO12C09 NSPRO12C09 NSPRO12C09 1
10 Needle Valve NSPRO12C10 NSPRO14C10 NSPRO18C10 1
11 O Ring NSPRO12C11 NSPRO12C11 NSPRO12C11 1
12 Gun Body NSPRO12C12 NSPRO12C12 NSPRO12C12 1
13 Inlet Connector NSPRO12C13 NSPRO12C13 NSPRO12C13 1
14 Air Adj Valve Set NSPRO12C14 NSPRO12C14 NSPRO12C14 1

14e Spring NSPRO12C14e NSPRO12C14e NSPRO12C14e 1
14F Stem NSPRO12C14f NSPRO12C14f NSPRO12C14f 1

15 Trigger Stopper NSPRO12C15 NSPRO12C15 NSPRO12C15 1
16 Trigger Bearing Stud NSPRO12C16 NSPRO12C16 NSPRO12C16 1
17 Trigger NSPRO12C17 NSPRO12C17 NSPRO12C17 1
18 Air Valve Spring NSPRO12C18 NSPRO12C18 NSPRO12C18 1
19 Air Valve NSPRO12C19 NSPRO12C19 NSPRO12C19 1
20 Air Valve Set NSPRO12C20 NSPRO12C20 NSPRO12C20 1

20a Air Valve Packing Seat NSPRO12C20a NSPRO12C20a NSPRO12C20a 1
20b Air Valve Packing NSPRO12C20b NSPRO12C20b NSPRO12C20b 1
20c Valve Body NSPRO12C20c NSPRO12C20c NSPRO12C20c 1
20d O Ring NSPRO12C20d NSPRO12C20d NSPRO12C20d 1

21 Fluid Joint NSPRO12C21 NSPRO12C21 NSPRO12C21 1
23 Cup Top Assembly NSPRO12C23 NSPRO12C23 NSPRO12C23 1
24 Nu t NSPRO12C24 NSPRO12C24 NSPRO12C24 1
25 Cup Gasket NSPRO12C25 NSPRO12C25 NSPRO12C25 1
26 Baffle NSPRO12C26 NSPRO12C26 NSPRO12C26 1
27 Cup NSPRO12C27 NSPRO12C27 NSPRO12C27 1
28 Tube Assembly NSPRO12C28 NSPRO12C28 NSPRO12C28 1
29 Yoke Assembly NSPRO12C29 NSPRO12C29 NSPRO12C29 1
30 Lever NSPRO12C30 NSPRO12C30 NSPRO12C30 1

# Spanner NSPRO12C31 NSPRO12C31 NSPRO12C31 1

# Cleaning Brush NSPRO12C32 NSPRO12C32 NSPRO12C32 1

# Air Hose Joint Set NSPRO12C33 NSPRO12C33 NSPRO12C33 1

#

Part not shown

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SPECIFICATIONS

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

CONTENTS page

NOTE :

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



ALWAYS

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

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



ALW AYS

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

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.



ALW AYS

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

areas.



ALWAYS

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

any disassembly.



ALWAYS

keep the spray nozzle in place when spraying.



ALW AYS

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



NEVER

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

medical advice immediately.



NEVER

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

source and electric sparks. Many paints are flammable.



NEVER

allow children to use or play with this appliance.



NEVER

spray products containing halogenated hydrocarbons (such as

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



NEVER

exceed the maximum input air pressure of 70 psi (4.8 bar).

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.

PARTS DIAGRAM

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Spray Nozzle

Wings

Fan Control

Fluid Control

Paint Cup Vent

Air Supply

Air flow Control

Paint Cup

Paint Cup
Locking Lever

GENERAL ARRANGEMENT

Pro-Gun spray guns are available with three nozzle sizes, 1.2mm, 1.4mm, and 1.8mm. The
larger the nozzle, the more compressed air is needed. Make sure your spray gun is matched
to the capacity of your compressor.

Model Nozzle size Compressor required

Pro-12C 1.2 mm 1.5 hp minimum
Pro-14C 1.4 mm 2.0 hp minimum
Pro-18C 1.8 mm 3.0 hp minimum

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.

AIR SUPPLY

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NOTES

Pro-Gun 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 spray pattern and fluid flow using the adjustment screws on the spray gun. The
spray pattern is variable between round and fan by adjusting the air flow through the air
cap. Turn the fan control screw anticlockwise to increase flow and give a fan shaped
spray pattern, turning clockwise to close off the air flow will give a circular pattern. The fan
can be adjusted vertically or horizontally to suit your requirements by loosening the
knurled locking ring and turning the wings 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 4.2 bar (approximately
22 - 60 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.

USING THE SPRAYGUN

PAINT SPRAYING HINTS Cont

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.

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

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

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

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

Varnishes...................... 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

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 (emulsions) 10-20% water.

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

Cellulose paints up to 50 % cellulose thinners.

IF IN ANY DOUBT, CONTACT THE PAINT MANUFACTURER

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

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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 :
a,

fluid needle packing

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

Coat the fluid control spring with vaseline.

CAUTION :

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

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.

MAINTENANCE

PAINT SPRAYING HINTS

W ARNING

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.

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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