INSTRUCTION MANUAL
AIR-POWERED
GRAVITY- FEED SPRAY GUN KIT
058-9311-0
TABLE OF CONTENTS
1
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
QUICK START GUIDE
TECHNICAL SPECIFICATIONS 2–3
SAFETY GUIDELINES 4–9
KEY PARTS DIAGRAM 10–11
IMPORTANT INFORMATION 12–13
OPERATING INSTRUCTIONS 14–19
MAINTENANCE 20–22
TROUBLESHOOTING 23–25
EXPLODED VIEW & PARTS LIST 26–29
WARRANTY 30–31
SAFETY GUIDELINES
4
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
This manual contains information that relates to PROTECTING PERSONAL SAFETY and PREVENTING
EQUIPMENT PROBLEMS. It is very important to read this manual carefully and understand it
thoroughly before using the product. The symbols listed below are used to indicate this information.
Note: The word “Note” is used to inform the
r
eader of something he/she needs to know about
t
he tool.
PERSONAL SAFETY
These precautions are intended for the personal safety of the user and others working with the user.
Please take time to read and understand them.
DANGER!
P
otential hazard that will result in serious
i
njury or loss of life.
WARNING!
P
otential hazard that could result in
serious injury or loss of life.
CAUTION!
P
otential hazard that may result in
m
oderate injury or damage to equipment.
SAFETY GUIDELINES
5
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
SAFETY GUIDELINES
N
ote: Carefully read and understand all the instructions in this manual before using the Air-powered
Gravity-feed Spray Gun. Ensure that the operator of the tool has read and understood these
instructions.
DANGER!
Potential hazard that will result in serious injury or loss of life.
• Keep children away from the work area. Do not allow children to handle
power tools.
• Do not point the tool towards yourself or other people, even when the tool is
n
ot used. Keep hands, feet, and all other parts of the body clear from work
area.
• N
ever use homogenate hydrocarbon solvent, which can chemically react
with aluminium and zinc parts and which is not chemically compatible with
aluminium and zinc parts.
• Do not use this tool in the presence of flammable liquids
o
r gases. Sparks that are created during use may ignite
gases. Please use the tool in a well-ventilated area only
and avoid any ignition sources such as smoking and open
flames.
• Do not use oxygen or any other combustible or bottled
g
as to power air-powered tools. Failure to observe this
warning can cause explosion and serious personal injury
or death. Use only the compressed air to power airpowered tools.
Use a minimum of 25’ (7.6 m) of hose to
connect the tool to the compressor. Failure to comply will
result in serious injury or loss of life.
• Risk of burns: The pump and the manifold generate high temperatures. In
order to avoid burns or other injuries, do not touch the pump, the manifold,
or the transfer tube while the compressor is running. Allow the parts to cool
down before handling or servicing. Keep children away from the compressor
at all times.
MC-OM-05
Oxygen
Hydrogen
Explosive
Combustible
MC-OM-02
SAFETY GUIDELINES
6
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
• Risk of electric shock: Do not expose a compressor to rain. Store it indoors.
Disconnect the compressor from the power source before servicing.
Compressor must be grounded. Do not use grounding adaptors.
• Risk of bursting: Do not adjust the pressure switch or
safety valve for any reason. They have been preset at the
factory for this compressor’s maximum pressure.
Tampering with the pressure switch or the safety valve
may cause personal injury or property damage. Make
sure the regulator is adjusted so that the compressor
outlet pressure is set lower than the maximum operating
pressure of the tool. Before starting the compressor, pull
the ring on the safety valve to make sure the valve
moves freely. Drain water from tank after each use. Do
not weld or repair tank. Relieve all pressure in the hose
before removing or attaching accessories.
• Risk for breathing: Never directly inhale the air produced by the compressor
and the spray gun. Always use the spray gun in the well-ventilated area.
• Risk of personal injury: Do not direct compressed air from the air hose
towards the user or other persons.
• Use compressed air at regulated pressure. Always use
clean, dry, and compressed air at the regulated pressure.
Do not exceed the maximum operating pressure of 80
PSI. Failure to comply will lead to serious injury or loss of
life.
MC-OM-22
MC-OM-06
SAFETY GUIDELINES
7
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
WARNING!
Potential hazard that could result in serious injury or loss of life.
• Do not allow unskilled or untrained individuals to operate the Air-powered
Gravity-feed Spray Gun.
• U
se components recommended by manufacturers. Never modify the tool for
other applications. Use only parts, nozzles, and accessories with
specifications as mentioned in this manual
(see section “Technical
specifications”)
.
• I
nspect the tool components and attachments before operation and ensure
that they are assembled properly and are not damaged. Failure to comply
could result in serious injury or loss of life.
• L
ocate the compressor in a well-ventilated area for cooling, a minimum of
12" (31 cm) away from the nearest wall.
• P
rotect the air hose and the power cord from damage and puncture. Inspect
t
hem for weak or worn parts every week, and replace them if necessary.
• A
lways wear hearing protection when using the air compressor. Failure to do
so may result in hearing loss.
• D
o not carry the compressor while it is running.
• D
o not operate the compressor if it is not in a stable position.
• D
o not operate the compressor on a rooftop or in elevated position that
could allow the unit to fall or be tipped over.
• A
lways replace a damaged gauge before operating the unit again.
SAFETY GUIDELINES
8
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
CAUTION!
Potential hazard that may result in moderate injury or damage to
e
quipment.
• Keep proper footing at all times in order to ensure correct balance.
• Do not use a tool that is leaking air, that has missing or damaged parts, or
that requires repairs. V
erify that all screws are securely tightened.
• For optimal safety and tool performance, i
nspect the tool daily in order to
ensure free movement of the trigger, safety mechanisms, and springs.
• E
nsure proper tool operation before painting. Before painting, inspect to
ensure free movement of the trigger and nozzle.
• C
heck the tightness of screws before operating the tool. Before operating
the tool, make sure all the screws and caps are securely tightened to
prevent leakage.
• K
eep the work area clean. A cluttered or dirty workbench may lead to an
accident. Floors should be kept clear.
• H
andling and storage of oil: Use with adequate ventilation. Avoid contact of
oil with eyes, skin, and clothing. Avoid breathing spray or mist. Store in a
tightly closed container in a cool, dry, well-ventilated area free from
incompatible substances.
• D
o not use the tool near or below freezing temperatures, as doing so may
cause tool failure.
• D
o not store the tool in a freezing environment to prevent ice formation on
the operating valves of the tool, as doing may cause tool failure.
• Use safety goggles and ear protection. Wear safety glasses
with side shields when operating the tool/compressor and
verify that others in the work area are also wearing safety
glasses. Safety glasses must conform to American National
Standards Institute (ANSI Z87.1) requirements and must
provide protection from flying particles from the front and
the sides.
Air-powered tools are loud and the sound can cause hearing
damage. Always wear ear protection to help prevent hearing
damage and loss. Failure to comply may result in moderate
injury.
MC-OM-01
Filter paper
10
IMPORTANT INFORMATION
12
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
General use
This Mastercraft® Air-powered Gravity-feed Spray Gun is an HVLP or high-volume low-pressure
sprayer. This tool applies paint with less force, reducing the bounce of the material from the surface
to be painted. It features a stainless steel needle and nozzle to accommodate a variety of coatings.
The spray gun is capable of forming very large patterns.
Compatible compressors and air tool
GUIDELINES FOR PROPER USE AND OPERATION
Be sure to use the proper air compressor with Mastercraft
®
air-powered tools. The compressor
should be able to supply a minimal air delivery of 5.1 SCFM @ 40psi to ensure the compressor can
run continuously with the Mastercraft
®
Air-powered Gravity-feed Spray Gun. Using tools or
combinations of tools that together or separately require more than the air compressor can deliver
will reduce performance and could void the compressor or tool guarantee/warranty.
Air Compressor
Size & Power Large spray gun
1 1/2–2 HP 2 1/2 HP 3 HP and more
5–6 Gallons
Light-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
8–11 Gallons
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
15 Gallons
and more
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Heavy-duty and
continuous use
Air Compressor
Size & Power -
Small spray gun
1 1/3–1 1/2 HP 2–2 1/2 HP 3 HP and more
4–6 Gallons
Light-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
8–11 Gallons
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
15 Gallons
and more
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Heavy-duty and
continuous use
IMPORTANT INFORMATION
13
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Storage
• Rotate the paint adjusting knob in a counterclockwise direction and open the knob when the
gun is not in use. This will reduce spring tension on the needle fluid tip.
• Clean the Air-powered Gravity-feed Spray Gun thoroughly and slightly lubricate it after using
and before storing.
CAUTION!
Potential hazard that may result in moderate injury or damage to
e
quipment.
• Incomplete or improper cleaning could cause function failures and a
degradation of the tool. Failure to comply may result in moderate injury or
damage to equipment.
OPERATING INSTRUCTIONS
14
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Before assembly and preparation
• After unpacking the tool, inspect it carefully and check thoroughly for any damage that may
have occurred during transit. Ensure the tightness of fittings, bolts, etc., before using the tool.
Paint filling
• Mixing and thinning of paint should be performed in accordance with the paint manufacturer’s
instructions. Most materials readily spray if thinning is properly performed.
N
ote: Always thin the paint with care.
WARNING!
Potential hazard that could result in serious injury or loss of life.
• Do not exceed the maximum pressure for the Air-powered Gravity-feed Spray
Gun or any other parts in the compressor system.
• Never aim or spray at yourself or anybody else. Failure to comply could result in
serious injury or loss of life.
CAUTION!
Potential hazard that may result in moderate injury or damage to
e
quipment.
• Do not exceed the thinning recommendations of the paint manufacturer. Failure
to comply may result in moderate injury or damage to equipment.
OPERATING INSTRUCTIONS
19
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Note: Use a piece of cardboard as a shield to
capture the loss of spray paint at the ends of
the workpiece to protect other surfaces from
being painted.
6. The speed of stroke, the distance from
work surface, and the adjustment of the
paint adjusting knob vary the amount of
paint being applied.
N
ote: Two proper and uniform thin coats of paint, rather than one thick layer, will yield better results
and have less chance of runs.
DO’S DON’TS
Always move the gun in a parallel direction.
1. Uniform coating region
2. Stroke starting position
3. Trigger pressing position
4. Trigger releasing position
5. Stroke stopping position
6. Gun movement path
Do not press the trigger with the gun at an
inclined position.
1. Improper/thin coating region
2. Uniform/thick coating region
MC-OM-16
2 3 4 5
6
1
6" - 12"
121
MC-OM-15
TROUBLESHOOTING
23
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Troubleshooting
The following chart lists common issues and solutions. Please read it carefully and follow all
instructions closely.
• Disconnect the electrical plug and air supply from the tool before making any adjustments.
• Repairs must be performed by a qualified service technician only.
WARNING!
Potential hazard that could result in serious injury or loss of life.
• If any of the following symptoms appear while the tool is in use, turn it off and
disconnect it from the air supply immediately. Failure to heed this warning
could result in serious personal injury.
PROBLEM POSSIBLE CAUSES SOLUTIONS
Fluttering or spitting
1. Paint level is too low.
2. Canister is tipped too far.
3. Fluid inlet connection is loose.
4. Fluid tip/seat is loosened or damaged.
5. Fluid needle packing nut is dry or
loose.
6. Air vent is clogged.
1. Add paint inside the canister.
2. Hold the canister in upright position.
3. Tighten the fluid connection.
4. Adjust or replace the fluid tip/seat.
5. Lubricate and/or tighten the nut.
6. Clear the vent hole.
Arc-shaped pattern
1. Fluid nozzle is worn or loose.
2. Paint has build up on air cap.
1. Tighten or replace fluid nozzle.
2. Remove obstructions from holes, but
don’t use metal objects to clean it.
MC-OM-08
MC-OM-09
TROUBLESHOOTING
24
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Pattern is not spread
uniformly
1. Paint has build up on air cap.
2. Fluid nozzle is dirty or worn.
1. Clean or replace air cap.
2. Clean or replace fluid nozzle.
Centre of pattern is
too narrow
1. Paint is too thin or not sufficient.
2. Atomization air pressure is too high.
1. Regulate paint viscosity.
2. Reduce air pressure.
Width of spray
pattern is too narrow
1. Paint is too thick.
2. Atomization air pressure is too low.
1. Regulate paint viscosity.
2. Increase air pressure.
Air leakage from air
cap when trigger is
not pressed
1. Air inlet valve or seat is contaminated.
2. Inlet valve stem is stuck.
3. Air inlet valve or seat is worn or
damaged.
4. Air inlet spring is broken.
5. Inlet valve stem is bent.
1. Lubricate the inlet valve stem.
2. Clean the air inlet valve or seat.
3. Replace air inlet valve or seat.
4. Replace air inlet spring.
5. Replace inlet valve stem.
Fluid leakage from
packing nut
1. Packing nut is loose.
2. Packing is worn or dry.
1. Tighten, but do not restrict the needle
movement.
2. Replace or lubricate (non-silicone oil).
Excessive overspray
1. Atomization pressure is too high.
2. Work surface is too far.
3. Improper stroking (arcing, gun motion
are too fast).
1. Reduce the air pressure.
2. Adjust to proper distance.
3. Move at moderate pace, parallel to work
surface.
PROBLEM POSSIBLE CAUSES SOLUTIONS
MC-OM-10
MC-OM-11
MC-OM-12
TROUBLESHOOTING
25
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Note: For further repair information, please call 1-800-689-9928.
No spray
1. No pressure in gun.
2. Fluid control is not properly opened.
3. Fluid is too thick or heavy.
1. Check air lines.
2. Open the fluid control.
3. Thin the fluid or change to pressure
feed system.
PROBLEM POSSIBLE CAUSES SOLUTIONS
PARTS LIST
29
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT WITH ACCESSORIES 058-9311-0
Parts list - Touch-up Spray Gun
If any parts are missing or damaged, if you have any questions, please call 1-800-689-9928.
No. Description Qty. No. Description Qty.
1 Air adjusting screw 1 23 Sealing washer 1
2 Air adjusting joint 1 24 Nut compressed spring 1
3 O-ring 2.5 X 2.1 1 25 Trigger level II 1
4 Washer 2 26 Trigger level I 1
5 Air inlet spring 1 27 Trigger 1
6 Air inlet valve 1 28 Snap retainer 2
7 Switch spring 1 29 Canister cover 1
8 Air inlet valve 1 30 Canister 1
9 Switch knob 1 31 Filter 1
10 O-ring 4.9 X 1.5 1 32 Fluid inlet joint 1
11 Switch seat 1 33 Needle 1
12 Sealing washer 2 34 Spring 1
13 Lock screw 1 35 Paint adjusting joint 1
14 Round nut 1 36 Paint adjusting screw 1
15 Air cap washer 1 37 Bolt 1
16 Atomization 1 38 Pattern adjusting screw 1
17 Nut housing 1 39 Pattern adjusting joint 1
18 O-ring 17 X 1.5 1 40 O-ring 2 X1.5 1
19 Fluid nozzle 1 41 Snap retainer 1
20 Fluid nozzle washer 1 42 Pattern adjustment seat 1
21 Screw 1 43 Gun body 1
22 Needle washer 1 44 Air inlet plug 1
WARRANTY
30
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Mastercraft® limited warranty
These warranties are subject to the following conditions and limitations:
a. A bill of sale verifying the purchase and purchase date must be provided.
b. This warranty will not apply to any product or part thereof which is worn or broken or which
has become inoperative due to abuse, misuse, accidental damage, neglect, or lack of proper
installation, operation, or maintenance (as outlined in the applicable instruction manual or
operating instructions), or which is being used for industrial, professional, commercial, or
rental purposes.
c. This warranty will not apply to normal wear and tear or to expendable parts or accessories
that may be supplied with the product which are expected to become inoperative or unusable
after a reasonable period of use.
d. This warranty will not apply to routine maintenance and consumable items such as, but not
limited to, fuel, lubricants, vacuum bags, blades, belts, sandpaper, bits, fluids, tune-ups, or
adjustments.
e. This warranty will not apply where damage is caused by repairs made or attempted by others
(i.e., persons not authorized by the manufacturer).
f. This warranty will not apply to any product that was sold to the original purchaser as a
reconditioned or refurbished product (unless otherwise specified in writing).
This Mastercraft
®
product is guaranteed for a period of 3
years from the date of original retail purchase against
defects in workmanship and materials, except for the
following component:
Component A: Accessories, which are guaranteed for a
period of 1-year from the date of original retail purchase
against defects in workmanship and materials.
Subject to the conditions and limitations described below,
this product, if returned to us with p
roof of purchase within
the stated warranty period and if covered under this
warranty, will be repaired or replaced (with the same model,
or one of equal value or specification), at our option. We will
bear the cost of any repair or replacement and any costs of
labor relating thereto.
WARRANTY
31
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
g. This warranty will not apply to any product or part thereof if any part from another
manufacturer is installed therein or any repairs or alterations have been made or attempted by
unauthorized persons.
h. This warranty will not apply to normal deterioration of the exterior finish, such as, but not
limited to, scratches, dents, paint chips, or to any corrosion or discoloring by heat, or
abrasives and chemical cleaners.
i. This warranty will not apply to component parts sold by and identified as the product of
another company, which shall be covered under the product manufacturer’s warranty, if any.
Additional limitations
This warranty applies only to the original purchaser and may not be transferred. Neither the retailer
nor the manufacturer shall be liable for any other expense, loss or damage, including, without
limitation, any indirect, incidental, consequential, or exemplary damages arising in connection with
the sale, use, or inability to use this product.
Notice to consumer
This warranty gives you specific legal rights, and you may have other rights, which may vary from
province to province. The provisions contained in this warranty are not intended to limit, modify, take
away from, disclaim, or exclude any statutory warranties set forth in any applicable provincial or
federal legislation.
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