MasterCraft 058-9807-2 User manual

model no. 058-9807-2
OPERATING
MANUAL
IMPORTANT:
For your own safety, read and follow all of the Safety Guidelines
and Operating Instructions before operating this air-powered
gravity-feed spray gun. Keep this manual for future reference.
AIR-POWERED
GRAVITY-FEED SPRAY GUN KIT

3
TABLE OF CONTENTS
TABLE OF CONTENTS
TECHNICAL SPECIFICATIONS
SAFETY GUIDELINES
KEY PARTS DIAGRAM
TECHNICAL INFORMATION
OPERATING INSTRUCTIONS
MAINTENANCE
TROUBLESHOOTING
EXPLODED VIEW
PARTS LIST
WARRANTY
4
5
10
11
13
19
22
24
25
28

54
SAFETY GUIDELINES TECHNICAL SPECIFICATIONS
model no. 058-9807-2 | contact us 1-800-689-9928
TECHNICAL SPECIFICATIONS
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.
Make sure you read and understand this manual before using this tool. Make sure other users
read and understand this manual before they use the tool.
SAFETY GUIDELINES
PERSONAL SAFETY
Potential hazard that will result in serious
injury or death.
Potential hazard that could result in
serious injury or death.
Potential hazard that may result in
injury or damage to equipment.
Note: The word “Note” is used to inform the readers of something
they need to know about the tool.
WARNING!
CAUTION!
DANGER!
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.
FLUID DELIVERY
NOZZLE
AIR HOSE REQUIRED
PAINT VISCOSITY
CFM REQUIREMENT
AIR INLET
PAINT CAPACITY
NORMAL AIR PRESSURE
WEIGHT
MAXIMUM MATERIAL TEMPERATUER
Gravity
1.4 mm & 1.7 mm
3/8" (9.5 mm)
Water–based paint
3.4 CFM @ 40 PSI
1/4"-18 NPT
0.6 L
29-50 PSI (2.0-3.5 bar)
1 lb 9 oz (0.65 kg)
50 ℃（122℉）
CF: Cubic Feet (the volumetric flow rate of air corrected to standardized
conditions of temperature and pressure).
NPT: National Pipe Thread.
FLUID DELIVERY
NOZZLE
AIR HOSE REQUIRED
PAINT VISCOSITY
CFM REQUIREMENT
AIR INLET
PAINT CAPACITY
NORMAL AIR PRESSURE
WEIGHT
MAXIMUM MATERIAL TEMPERATUER
Gravity
1.0 mm
3/8" (9.5 mm)
Water–based paint
1.4 CFM @ 40 PSI
1/4"-18 NPT
0.12 L
40-58 PSI (2.75-4.0 bar)
11 oz (0.32 kg)
50 ℃（122℉）

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Do not use oxygen or any other combustible or bottled
gas to power air-powered tools. Failure to observe this
warning can cause explosion and serious personal
injury or death. Use only compressed air to power
air-powered tools. Use a minimum of 25' (7.6 m) of
hose to connect the tool to only compressor. Failure to
comply will result in serious injury or death.
Risk of inhalation: Never directly inhale the air produced by the
compressor.
Risk of electric shock: Do not expose a compressor to rain.
Store it indoors. Disconnect the compressor from the power
source before servicing. The compressor must be grounded.
Do not use grounding adaptors.
Risk of personal injury: Do not direct compressed air from the air hose
towards the user or other people or animal.
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 and pets away from the
compressor at all times.
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.
Risk of bursting: 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 the tank after each use. Do not weld
nor repair the tank. Relieve all pressure in the hose
before removing or attaching accessories.
SAFETY GUIDELINES
SAFETY GUIDELINES SAFETY GUIDELINES
Potential hazard that will result in serious injury or loss of life.
Potential hazard that could result in serious injury or loss of life.
• Do not allow unskilled or untrained individuals to operate the
Gravity-feed Spray Gun.
• Use 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”).
• Inspect the tool components and attachments before operation and
ensure that they are assembled properly and are not damaged.
Failure to comply could lead to serious injury or loss of life.
• Locate the compressor in a well-ventilated area for cooling, at a
minimum of 12" (31 cm) away from the nearest wall.
• Protect the air hose and the power cord from damage and puncture.
Inspect them for weak or worn spots every week, and replace them
if necessary.
WARNING!
DANGER!
• 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 has stopped. Keep hands, feet, and all other parts of the
body clear from work area.
• Never use homogenate hydrocarbon solvent, which can chemically
react with aluminum and zinc parts and which is not chemically
compatible with aluminum and zinc parts.

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CAUTION!
Potential hazard that may result in injury or damage to
equipment.
CAUTION!
Potential hazard that may result in injury or damage to
equipment.
Note: Recycle unwanted materials rather than disposing of them as waste. Sort
the tools, hoses, and packaging in specific categories and take them to the local
recycling centre or dispose of them in an environmentally safe way.
SAFETY GUIDELINES SAFETY GUIDELINES
• 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. Verify that all screws are securely tightened.
• For optimal safety and tool performance, inspect the tool daily in order to
ensure free movement of the trigger, safety mechanisms, and springs.
• Ensure proper tool operation before painting. Before painting, inspect to
ensure free movement of the trigger and nozzle.
• Check 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.
• Keep the work area clean. A cluttered or dirty workbench may lead to an
accident. Floors should be kept clear.
• Handling 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.
• Do not use the tool near or below freezing temperatures, as doing so may
cause tool failure.
• Do 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.
Disconnect the spray gun from the air supply hose and turn
off the compressor before performing any maintenance,
when the tool is not in use, when it is being handed to
another person, and when it is left unattended. It is
recommended to use a ball valve in the gun to air supply,
for emergency stop and prevention of unintended operation.
•
• Use a safety respirator: Toxic vapours produced by spraying
certain materials can cause serious damage to health.
Always wear safety glasses, gloves, and a respirator to
prevent the hazard caused by inhaling toxic vapour or
contact of solvent and paint with eyes or skin. Failure to
comply may result in moderate injury.

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General use
KEY PARTS DIAGRAM TECHNICAL INFORMATION
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Plastic canister
Pattern adjusting knob
Gun body
Air adjusting knob
Trigger
Air cap nozzle and needle
Air inlet plug
Paint adjusting knob
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.
Air Compressor
Size and Power 1 1/2–2 HP 2 1/2–3 HP 3 HP and more
5–6 Gallons
8–11 Gallons
15 Gallons
and more
Light-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Air Compressor
Size and Power 1 1/2–2 HP 2 1/2–3 HP 3 HP and more
4–6 Gallons
8–11 Gallons
15 Gallons
and more
Light-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Light-duty and
intermittent use
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Compatible compressors and air tool
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 3.4 CFM @ 40 PSI to ensure it can run
continuously with the MAXIMUM® 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.
GUIDELINES FOR PROPER USE AND OPERATION

1312
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TECHNICAL INFORMATION
OPERATING INSTRUCTIONS
CAUTION!
Incomplete or improper cleaning could cause function failures and degradation
of the tool. Failure to comply may result in moderate injury or damage to
equipment.
•
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.
POTENTIAL HAZARD THAT MAY RESULT IN INJURY OR DAMAGE TO EQUIPMENT.
CAUTION!
POTENTIAL HAZARD THAT COULD RESULT IN SERIOUS INJURY OR LOSS OF LIFE.
Before assembly and preparation
• 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
EQUIPMENT.
• Do not exceed the thinning recommendations of the paint manufacturer. Failure
to comply may result in moderate injury or damage to equipment.
• 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 lling
• 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.
Note: Always thin the paint with care.

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Before assembly and preparation
OPERATING INSTRUCTIONS OPERATING INSTRUCTIONS
1. Attach the empty canister (1) to the
spray gun by lining up the threads,
holding the gun stationary and twisting
the canister clockwise until snug (fig A).
Note: Do not tighten the canister too tight by
hand, as doing so may break the plastic
canister.
Use the wrench provided to rotate the
nut (1) clockwise and tighten it securely
to ensure paint does not leak (fig B).
Pour paint through a strainer, cheese
cloth or a paint strainer to remove any
foreign substances from the paint (fig C)
Fill the canister three quarters full with
the paint.
3.
4.
5. Plug in compressor, turn it on set the
pressure regulator to 40 PSI. Connect
one end of the air hose (1) to the spray
gun (2) and the other end to the
compressor. The spray gun is now ready
to use (fig D).
6. After connecting the spray gun to the air
supply, ensure the fluid cap, canister,
and air hose are tightly connected with
the Air-powered Gravity-feed Spray Gun.
7. Use a piece of cardboard or other scrap
material as a target for trial spray and
adjust for best spray pattern.
8. Test the consistency of the paint by
making a few strokes on a cardboard
target. If the stroke appears to be very
thick, add a small amount of thinner.
loss of life.
lead to serious injury or loss of life.
lead to serious injury or loss of life.
• 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 performing service operation.
Paint filling
• Mixing and thinning of paint should be performed in
performed.
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. Failure to
comply could lead to serious injury or loss of life.
• Never aim or spray at yourself or anybody else as this could cause
serious injury. Failure to comply could lead to serious injury or loss of life.
• 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 performing service operation.
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.
• Do not exceed the thinning recommendations of the paint manufacturer.
Failure to comply may result in moderate injury or damage to equipment.
CAUTION!
Potential hazard that may result in injury or damage to equipment.
NOTE: Always thin the paint with care.

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Adjustments
OPERATING INSTRUCTIONS OPERATING INSTRUCTIONS
The Gravity-feed Spray Gun has a pattern
adjusting knob (1), a paint adjusting knob (2),
and an air adjusting knob (3) that are used to
obtain the desired pattern, to control the output
volume of paint, and to obtain fine atomization,
respectively (fig E).
PATTERN ADJUSTMENT
Rotate the pattern adjusting knob clockwise to
form a circular spray pattern and rotate the
knob counter-clockwise to form an elliptical
spray pattern.
PAINT ADJUSTMENT
Rotate the paint adjusting knob clockwise to
reduce the output volume of paint and rotate
the knob counter-clockwise to increase the
output volume of paint.
AIR VOLUME ADJUSTMENT
Rotate the air adjusting knob clockwise to
reduce the output volume of air and rotate the
knob counter-clockwise to increase the output
volume of air.
Operation
1. Plug in compressor, turn it on set the
pressure regulator to 40 PSI, attach one
end of the air hose to the compressor
and the other end of the air hose (1) to
the air tool (2) (fig F).
2. Hold the spray gun (1) so that the nozzle
is approximately 6 to 12” from the work
surface, perpendicular to the spraying
area (fig G).
Note: Do some practice sprays while adjusting
the spray pattern and setting up the gun, using
a spare surface (scrap piece of metal).
3. Squeeze the trigger (1) of the spray gun
(2). Start moving the gun before pressing
the trigger and release the trigger before
stopping the gun movement at the end
of each stroke. This procedure will blend
each stroke with the next without any
overlap or unevenness (fig H).
4. Move the spray gun (1) at a constant
pace in a back and forth parallel
direction, maintaining a uniform distance
from the surface to be painted (fig I).
5. Repeat the strokes until a uniform
coating is formed.
Potential hazard that could result in serious injury or loss of life.
WARNING!
• Do not exceed the maximum pressure for the Air-powered Gravity-feed
Spray Gun or any other parts in the compressor system. Failure to comply
could lead to serious injury or loss of life.
• Never aim or spray at yourself or anybody else as this could cause serious
injury. Failure to comply could lead to serious injury or loss of life.
• 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 performing service operation.
performed.
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.

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OPERATING INSTRUCTIONS MAINTENANCE
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.
2 3 4 5
6
1
6" - 12"
121
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.
DO’S DONT’S
Always move the gun in a parallel
direction.
Do not press the trigger with the gun
at an inclined position.
1. Uniform coating region
2. Stroke starting position
3. Trigger pressing position
4. Trigger releasing position
5. Stroke stopping position
6. Gun movement path
1. Improper/thin coating region
2. Uniform/thick coating region
Note: Two proper and uniform thin coats of paint, rather than one thick layer, will
yield better resultsand have less chance of runs.
Care of spray gun
The spray gun should be cleaned after every
use. The paint remaining inside the gun
thickens and may damage the inner
components and mechanism of the gun.
Washing procedure
1. Cover the air cap with a cloth and pull
the trigger. The air that is blown out of
the paint nozzle tip enters the paint
passage and cleans the inside of the
gun.
2. Discard the paint remaining in the
canister and add some thinner for
washing and blow out the gun.
3. Clean the inside and outside of the spray
gun (1) with a brush (2) (fig A).
4. Clean the inside of the paint canister (1)
(fig B).
5. Remove and clean the inside and
outside of the air cap with a brush
soaked in cleaning solvent.
NOTE: Two proper and uniform thin coats of paint, rather
than one thick layer, will yield better results and reduce the
chance of runs.
CAUTION!
Potential hazard that may result in moderate injury or damage to
equipment. Potential hazard that may result in moderate injury or damage to
equipment.
• Do not fan the gun while painting. This will cause a build-up of paint
in the centre of the stroke and an insufficient coating at the ends.
Failure to comply may result in moderate injury or damage to
equipment.
When it is hard to get rid of the stuck paint, wash it
after soaking it in lacquer thinner.
CAUTION!
• Ensure that the needle is removed before disassembling the nozzle, to
avoid damage to the nozzle closure housing. Failure to comply may
result in injury or damage to equipment.
NOTE: