MasterCraft 058-9312-8 User manual

INSTRUCTION MANUAL
AIR-POWERED
GRAVITY- FEED SPRAY GUN
058-9312-8

TABLE OF CONTENTS
1
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
QUICK START GUIDE
TECHNICAL SPECIFICATIONS 2
SAFETY GUIDELINES 3–8
KEY PARTS DIAGRAM 9
IMPORTANT INFORMATION 10–11
OPERATING INSTRUCTIONS 12–16
MAINTENANCE 17–19
TROUBLESHOOTING 20–22
EXPLODED VIEW 23
PARTS LIST 24
WARRANTY 25–26

SAFETY GUIDELINES
3
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
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
reader of something he/she needs to know about
the 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!
Potential hazard that will result in serious
injury or loss of life.
WARNING!
Potential hazard that could result in
serious injury or loss of life.
CAUTION!
Potential hazard that may result in
moderate injury or damage to equipment.

SAFETY GUIDELINES
4
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
SAFETY GUIDELINES
Note: Carefully read and understand all the instructions in this manual before using the 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
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 aluminium and zinc parts and which is not chemically compatible with
aluminium and zinc parts.
•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 personal injury: Do not direct compressed air from the air hose
towards the user or other persons.
•Risk for breathing: Never directly inhale the air produced by the compressor.
Use the spray gun in a well ventilated area.
•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.

SAFETY GUIDELINES
5
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
•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 tank after
each use. Do not weld or repair tank. Relieve all pressure
in the hose before removing or attaching accessories.
•Do not use this tool in the presence of flammable liquids
or 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
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 the compressor. Failure to comply will
result in serious injury or loss of life.
MC-OM-22
MC-OM-05
Oxygen
Hydrogen
Explosive
Combustible
MC-OM-02

SAFETY GUIDELINES
6
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
WARNING!
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.
•Always wear hearing protection when using the air compressor. Failure to do
so may result in hearing loss.
•Do not carry the compressor while it is running.
•Do not operate the compressor if it is not in a stable position.
•Do not operate the compressor on a rooftop or in elevated position that
could allow the unit to fall or be tipped over.
•Always replace a damaged gauge before operating the unit again.
•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 could lead to serious injury or loss
of life.
MC-OM-06

SAFETY GUIDELINES
8
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
Note: Recycle the unwanted materials rather than disposing them as waste. Sort tools, hoses, and
packaging into separate categories and take them to the local recycling centre or dispose them in an
environmentally safe way.
CAUTION!
Potential hazard that may result in moderate injury or damage to
equipment.
•Use safety respirator: Toxic vapours produced by spraying
certain materials can cause serious damage to health.
Always wear safety gloves and a respirator to prevent
hazards caused by inhaling toxic vapour or contact of
solvent and paint with eyes or skin. Failure to comply may
result in moderate injury.
•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-04
MC-OM-01

IMPORTANT INFORMATION
10
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
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 it 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.
Storage
• Rotate the paint adjusting knob in a counter-clockwise 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 the and
before storage.
Air Compressor
Size and Power 1 1/2–2 HP 2 1/2–3 HP 3 HP and more
5–6 Gallons Light-duty and
intermittent use
Light-duty and
intermittent use
Light-duty and
intermittent use
8–11 Gallons Light-duty and
intermittent use
Medium-duty and
intermittent use
Medium-duty and
intermittent use
15 Gallons
and more
Medium-duty and
intermittent use
Heavy-duty and
continuous use
Heavy-duty and
continuous use

IMPORTANT INFORMATION
11
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
CAUTION!
Potential hazard that may result in moderate injury or damage to
equipment.
•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
12
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
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 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.
Note: 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. 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.
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.

OPERATING INSTRUCTIONS
16
AIR-POWERED GRAVITY-FEED SPRAY GUN 058-9312-8
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.
• The speed of the stroke, the distance from the work surface, and the setting of the paint
adjusting knob vary the amount of paint being applied.
Note: Two proper and uniform thin coats of paint, rather than one thick layer, will yield better results
and reduce the 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 or angled position.
Do not stop the sprayer movement in between
strokes, as this will cause a build-up of paint
and result in runs.
1. Improper/thin coating region
2. Uniform/thick coating region
CAUTION!
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.
MC-OM-16
2 3 4 5
6
1
6" - 12"
121
MC-OM-15