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58-7922-8
4 Gal Air Compressor
INSTRUCTION MANUAL
FOR SAFE OPERATION, READ AND UNDERSTAND
ALL INSTRUCTION MANUAL
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and
SAFETY GUIDELINES – DEFINITIONS
This manual contains information that is important for you to know and
YOUR SAFETY
and
DANGER indicates
hazardous situation which, if not
indicates a potentially
result in
WARNING
indicates a potentially
result in
used without the safety
result in
When using electric tools, basic safety precautions
When using electric tools, basic safety precautions
This tool was designed for certain applications. It is strongly recommended
which it was designed. If you have any questions relative to its application
DO NOT use the tool until you have consulted with an authorices service
representative.
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WHAT CAN HAPPEN
WITHIN THE MOTOR AND PRESSURE SWITCH
ELECTRICAL
FROM COMPRESSOR
VAPORS, THEY MAY IGNITE, CAUSING FIRE OR
ANY OF THE
VENTILATION OPENINGS WILL CAUSE
ALWAYS
AREA FREE OF
IF SPRAYING FLAMMABLE
LEAST 20' AWAY FROM SPRAY AREA.
AN ADDITIONAL LENGTH OF HOSE MAY BE
IN AN OPEN AREA AT LEAST 12" AWAY
WOULD RESTRICT THE FLOW OF FRESH AIR TO
WELL-VENTILATED AREA.
ALWAYS REMAIN NEAR THE PRODUCT WHEN
IT IS OPERATING.
AIR TANK: THE FOLLOWING CONDITIONS COULD
AND RESULT IN A VIOLENT TANK EXPLOSION AND COULD
WHAT CAN HAPPEN
CONDENSED
WATER FROM THE TANK,
CAUSING RUST
AND THINNING OF THE STEEL TANK.
OR ATTEMPTED REPAIRS
UNLOADER VALVE, SAFETY VALVE, OR
TANK
4.
THE AIR TANK AND CAUSE RUPTURE OR
EXPLOSION.
ATTACHMENTS & ACCESSORIES:
AIR TOOLS,
SPRAY GUNS, AIR OPERATED
ACCESSORIES, TIRES AND OTHER
DRILL INTO, WELD, OR
OR ITS
ATTACHMENTS.
THE TANK IS DESIGNED TO WITHSTAND
OF YOUR COMPRESSOR.
FOLLOW THE EQUIPMENT MANUFACTURER'S
ATTACHMENTS.
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WHAT CAN HAPPEN
AND CAN PROPEL DIRT, CHIPS, LOOSE
ALWAYS WEAR ANSI Z87.1 APPROVED SAFETY
ALWAYS TURN THE COMPRESSOR OFF AND
ATTACHING TOOLS OR ACCESSORIES.
WHAT CAN HAPPEN
RISK OF INHALATION
SPRAYED MATERIALS SUCH AS PAINT, PAINT
SOLVENTS, PAINT REMOVER, INSECTICIDES,
AND WEED KILLERS, CONTAIN HARMFUL
VAPORS AND POISONS.
ALWAYS OPERATE THE AIR COMPRESSOR OUTSIDE
BASEMENTS, OR STORAGE SHEDS, WHICH LACK A
WORK IN AN AREA WITH GOOD CROSSVENTILATION. READ AND FOLLOW THE
SAFETY INSTRUCTIONS PROVIDED ON THE
LABEL OR SAFETY DATA SHEETS FOR THE
MATERIAL YOU ARE SPRAYING. USE A NIOSH/
WHAT CAN HAPPEN
YOUR AIR COMPRESSOR IS POWERED BY
ANY ELECTRICAL WIRING OR REPAIRS
CENTRE PERSONNEL IN ACCORDANCE WITH
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WHAT CAN HAPPEN
YOU OR YOUR CLOTHING.
ATTEMPTING TO OPERATE COMPRESSOR WITH
ANY REPAIRS REQUIRED ON THIS PRODUCT
SERVICE CENTRE PERSONNEL.
WHAT CAN HAPPEN
HOW TO PREVENT
AFTER OPERATION. COMPRESSOR WILL
WHAT CAN HAPPEN
A PORTABLE COMPRESSOR CAN FALL FROM
A TABLE, WORKBENCH OR ROOF CAUSING
DAMAGE TO THE COMPRESSOR AND COULD
RESULT IN SERIOUS INJURY OR DEATH TO THE
OPERATOR OR BYSTANDERS.
ALWAYS OPERATE COMPRESSOR IN A STABLE
WHAT CAN HAPPEN
HOW TO PREVENT
WILL DAMAGE CARPET, PAINT OR OTHER
ALWAYS PLACE COMPRESSOR ON A
VEHICLE IMMEDIATELY UPON ARRIVAL AT YOUR
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SCFM or CFM:
Standard Cubic Feet per Minute; a unit of measurement for air delivery.
MODEL NO. 58-7922-8
SCFM @ 40 PSIG 7.3
SCFM @ 90 PSIG 4.6
Cut-In 80 PSI
Cut-out 125 PSI
Bore 2.375”
Stroke 1.180”
Voltage/Hertz/Phase 120/60/1
Minimum Branch Circuit 15 A
* Fuse Type TIME DELAY TYPE “T”
Amperage at Max. Load 13 A
4 GAL
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Air Compressor Pump: To compress air,
Check Valve (B, Fig. 1): When the air
compressor is operating, the check
valve is “open”, allowing compressed
air to enter the air tank. When the air
compressor reaches “cut-out” pressure,
the check valve “closes”, allowing air
pressure to remain inside the air tank.
ON/AUTO-OFF Switch (C, Fig.2):Turn
this switch ON to provide power to the
automatic pressure switch and OFF to
remove power at the end of each use.
Pressure Switch (C, Fig. 2): The pressure
switch automatically starts the motor
when the tank pressure drops below the
factory set “cut-in” pressure. It stops the
motor when the air tank pressure reaches
the factory set “cut- out” pressure.
Regulator (D, Fig. 4): The air pressure coming from the air tank is controlled
from a lower pressure. When reducing from a higher to a lower setting, fi rst
pressure. Depending on the air requirements of each particular accessory,
the outlet regulated air pressure may
have to be adjusted white operating the
accessory.
Outlet Pressure Gauge (E, Fig. 4): The
outlet pressure gauge indicates the air
pressure available at the outlet side of
the regulator. This pressure is controlled
by the regulator and is always less than
or equal to the tank pressure. See
“Operating Procedures”.
B
C
G
Fig. 1
Fig. 2
Fig. 3
D
F
K
E
Fig. 4
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ENGLISH
reaches cut-out pressure.
Safety Valve (K, Fig. 4): If the pressure switch does not shut off the air
Tank Pressure Gauge (F, Fig. 4): The tank pressure gauge indicates the
Drain Valve (G, Fig. 3): The drain valve is located at the base of the air tank
escaping from this valve for a few seconds. No air should be heard
leaking when the motor is running, or continuous leaking after unit
If the safety valve does not work properly, over-pressurization
may occur, causing the air tank to rupture or an exploded. The ring on the
safety valve should be pulled daily to make sure that the safety valve operates
freely,if the valve is stuck or does not operate smoothly, it must be replaces
with the same type of valve.
Your compressor comes to you completely assembled and ready for use.
Overload protection(Fig. 5) This compressor has a reset
overload reset button that will restart the motor
after it shuts off due to overloading or low voltage.
If the motor stops during operation:
1. Turn the ON/OFF switch to the OFF position.
2. Wait about five minutes for the motor to cool.
3. Push in on the reset button.
4. Turn the switch to the ON position.
TO PREVENT AN ACCIDENTAL START-UP IF THE RESET BUTTON
IS PUSHED, THE ON/OFF SWITCH SHOULD BE IN THE OFF POSITION AND
THE PLUG SHOULD BE REMOVED FROM THE POWER SOURCE WHILE
COOL DOWN TAKES PLACE.
Overload
protection
Fig. 5
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DO NOT USE AN ADAPTOR.
IMPROPER GROUNDING CAN RESULT
IMPROPER GROUNDING CAN RESUL
IN SEVERE
T IN SEVERE
• A 3-pronged extension cord that has a 3-blade grounding plug, and a 3-slot
receptacle that will accept the plug on the compressor.
• No longer than 50'.
14 gauge (AWG) or larger. (Wire size increases as gauge number
decreases.) 12 AWG, 10 AWG and 8 AWG may also be used. DO NOT
USE 16 AWG or SMALLER.
ADDITIONAL REGULATORS AND CONTROLS
LUBRICATION
The bearings in this unit are sealed, containing sufficient lubricant to last
their lifetime. No other lubrication is required.
NOTE: Serious damage may result if the following break-in
instructions are not closely followed.
VOLTAGE AND CIRCUIT PROTECTION
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f. After 15 minutes, close the drain valve by turning knob. The air receiver will
fill to cut-out pressure and the motor will stop. The compressor is now ready
for use.
is set to “OFF” and the air regulator is closed.
TOO MUCH AIR PRESSURE CAUSES A HAZARDOUS RISKTOO MUCH AIR PRESSURE CAUSES A HAZARDOUS RISK
OF TANK EXPLOSION. CHECK THE MANUFACTURER’S MAXIMUM
PRESSURERATING FOR AIR TOOLS AND ACCESSORIES. THE REGULATOR
Motor will stop when tank pressure reaches “cut-out” pressure.
correct pressure setting. The compressor is ready for use.
gasoline or other solvent vapors. Do not operate the compressor near the
spray area.
After Use:
7. Turn the regulator counter clockwise to set the outlet pressure to zero.
until tank pressure is approximately 20 PSI. Release safety valve ring.
10. Drain water from air tank. Turn the drain valve (G, Fig. 3), counter clockwise,
to open.
WATER WILL CONDENSE IN THE AIR TANK. IF NOT
WATER WILL CONDENSE IN THE AIR TANK. IF NOT
NOTE: If drain valve is plugged, pull the ring on the safety valve (K, Fig. 4), and hold
8. Remove the air tool or accessory.
9. Pull ring on the safety valve (K, Fig. 4), allowing air to bleed from the tank
Set the “OFF/AUTO” lever to “OFF”.
Turn the OFF/AUTO lever to “AUTO” and allow tank pressure to build.
b. Plug the power cord into the correct branch circuit receptacle.
c. Turn the drain valve (G, Fig. 3), opening it fully, to prevent air pressure
build-up in the tank.
there is no tank pressure build-up.
Move the pressure switch lever to “ON/AUTO”. The compressor will start.
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Should your tool fail to start, check to make sure the prongs on the power cord's
plug are making good contact in the outlet. Also, check for blown fuses or open
All quality tools will eventually require servicing or replacement of parts due
either an AUTHORIZED MASTERCRAFT SERVICE STATION or a SERVICE
CENTRE. All repairs made by these agencies are fully guaranteed against
2. Turn the regulator counterclockwise to set the outlet pressure to zero.
tank pressure is approximately 20 PSI. Release safety valve ring.
5. Drain water from air tank. Turn drain valve (J, Fig. 2), counter clockwise, to
open.
WATER WILL CONDENSE IN THE AIR TANK. IF NOT
WATER WILL CONDENSE IN THE AIR TANK. IF NOT
NOTE: If drain valve is plugged, pull the ring on the safety valve (K, Fig. 3), and
hold until all air pressure has been released. The valve can then be removed,
The air compressor can now be stored.
loosely around the air compressor.
3. Remove the air tool or accessory.
4. Pull the ring on safety valve (K, Fig. 3), allowing air to bleed from the tank until
KEEP CLEAN
WEAR SAFETY GLASSES WHILE USING COMPRESSED
WEAR SAFETY
AIR.
GLASSES WHILE USING COMPRESSED AIR.
The air compressor can now be stored.
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14-3
14-2
14-1
14-8
14-5
14-6
14-7
14-4
14
13
13
1
2
3
4
5
6
7
8
9
10
11
12
13
13
17
18
15
16
NO. Part Description NO. Part Description
1 Air Tank 14 Console Assembly
2 Pump Assembly 14-1 Gauge
3 Rubber Bumper 14-2 Elbow Fitting 120°
4 Wheel Axle 14-3 Regulator/Manifold
5 Wheel 14-4 Quick Connect Body
6 Rubber Bumper 14-5 Screw
7 Air Hose 14-6 Console Panel
8 Hose Clamp 14-7 Rubber Bumper
9 Elbow Fitting 90° 14-8 Safety Valve
10 Pressure Switch 15 Check Valve
11 Copper Pipe 16 Copper Pipe
12 Power Cord 17 Handle
13 Screw 18 Assistant Handle
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Warranty
Mastercraft is a superior line of products selected for their workmanship and
materials. These products are designed to meet rigorous quality and
performance standards, and are approved by our Quality Assurance
laboratory.
This Mastercraft product carries a three (3) year repair warranty against
defects in workmanship and materials. At its discretion, Mastercraft Canada
agrees to have any defective part(s) repaired or replaced free of charge,
within the stated warranty period, when returned by the original purchaser
with proof of purchase. This product is not guaranteed wear or breakage
due to misuse and/or abuse.
If this product is used for commercial, industrial or rental purp oses, the
warranty will apply for ninety (90) days from date of purchase.
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