Craftsman 919.17673 User Manual
OWNERS
MANUAL
MODEL NO.
919.176731
919.176831
IMPORTANT:
Read the Safety Guidelines
and Alt instructions
Carefully Before Operating
CRAFTSMAN AIR COMPRESSOR
Record in the spaces provided.
(1) The model number which can be
found on the label on the rear of the
air tank.
(2) The code number which can be
found on the foil label on the rear of
the air tank.
The Manufacturers Number
(3)
(MFG...) (ASME Code Compres
sors only) is located on the metal
data plate which Is welded onto the
backside of the air tank. (This data
plate is painted the same color as the
tank.)
(4) The Motor Manufacturers name
which is located on the motor label
or specification plate.
The Motor Mfg. number - also
(5)
located on the motor label or specifi
cation plate.
Retain these numbers for future
reference.
ASSEMBLY
OPERATION
MAINTENANCE
REPAIR PARTS
Model No..
Code No. _
Mfg. No. __
SI-30-14-4-D 6/89
Motor Mfg. Name.
Motor Mfg. No
__
Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.
WARRANTY.
SAFETY GUIDELINES
TABLE OF CONTENTS
Page
. 3
WARNING CHART.
SPECIFICATION CHART.........................................
..................................................................................................
.
..............................................
.
5
3
GLOSSARY.................................................................................................................. 5
ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS
GENERAL INFORMATION
DESCRIPTION OF OPERATION
ASSEMBLY INSTRUCTIONS
Items You Will Need to Assemble Your Compressor
Installing Handle......................................................................................................................
installing Rubber Foot Strip and Wheels
Installing Tank Pressure Gauges
Installing Regulator.................................................................................................................
...................................................................................... e
.............................................................................
...............................................................................................
...............................................................
................................................................................. 3
.........................................................................................
.............................. 6
e
7
7
7
g
g
INSTALLATION AND BREAK-IN PROCEDURES...................................................... 8
Location of Air Compressor
Extension Cords ....................................................................................................................
Lubrication and Oil.................................................................................................................... g
Grounding instructions.
Break-in Procedures..................................................................................................................... 9
................................................................................................. s
g
............................................................................................................... 9
OPERATING PROCEDURES
........................................
.................................. 9
MAINTENANCE......................................................................................................... 10
Air Filter - Inspection and Replacement...................................................................................
Oil - Checking and Changing
Check Valve - Replacement ............................................................................................. 10
Safety Valve - Inspection.......................................................................................................... 10
Motor......................................................................................................................................... to
Belt - Replacement
Pulley and Flywheel - Alignment
STORAGE
.............................................................................................................. 11
................................................................................................................... 11
TROUBLESHOOTING GUIDE
AIR COMPRESSOR DIAGRAM
Parts List........................................................................................................................................ t6
...
................................................................................................ to
................................................................. ............................ 11
.........................................................................
..............................................................................................
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to
11
14
COMPRESSOR PUMP DIAGRAM................................................................................ 15
Parts List .................................................................................................................................. 17
HOW TO ORDER REPAIR PARTS...........................................................................
ig
FULL ONE YEAR WARRANTY
ON AIR COMPRESSORS
If this air compressor fails due to a defect in material or workmanship within one year from the date of
purchase, return it to the nearest Sears Service Center/Department throughout the United States and
Sears will repair it, free of charge.
If this air compressor is used for commercial or rental purposes, the warranty will apply for ninety days
from the date of purchase.
This warranty gives you specific legal rights and you may have other rights that vary from state to
state.
Sears, Roebuck and Co., Sears Tower, Dept. 698/7131CR-W, Chicago, IL 60684
SAFETY GUIDELINES
This manual contains information that is important for you to know and understand- This information
relates to protecting your safety and preventing equipment problems. To help you recognize this
information, we use the following symbols. Please read the manual and pay special attention to
sections headed by these symbols.
WARNING
ANGER
1
URGENT SAFETY INFORMATION - A
HAZARD THAT WI LL CAUSE SERIOUS
INJURY OR LOSS OF LIFE.
CAUTION
Information for preventing damage to
equipment.
WARN
HAZARDS CAN OCCUR IF EQUIPMENT IS NOT USED PROPERLY.
PLEASE READ THE FOLLOWING CHART.
WHAT TO
LOOK FOR
Unsuitable The solvents 1,1,1 - Trichlorethane and MethySolvents tone Chloride can chemically react with alumi
Electricity Your air compressor is powered by electricity.
WHAT COULD HAPPEN
num used in paint spray guns, paint pumps, etc.,
and cause an explosion. These solvents can
also react with galvanized components and
cause corrosion and weakening of parts. This
does not affect your air compressor - but it may
affect the equipment being used.
Like any other electrically powered device, if it is
not used properly it can cause electrica! shock.
IMPORTANT SAFETY IN.FORMATiOM - A
HAZARD THAT MIGHT CAUSE SERIOUS
INJURY OR LOSS OF LIFE.
NOTE
Information that you should pay special atten
tion to.
1
HOW TO PREVENT IT
If the material you intend to spray contains the sol
vents listed at left (read the label or data sheet), do
not use accessories that contain aluminum or gal
vanized parts. You must either change the material
you intend to spray, or use only stainless steel
spray equipment.
Always unplug the air compressor prior to mainte
nance or repair.
Never use the air compressor outdoors when it is
raining.
Always plug the cord into an electrical outlet with
the specified voltage and adequate fuse
protection.
3
WHAT TO
LOOK FOR
Hot Parts
Flammable
Vapors
Compressed Air
Moving
Parts
Toxic Vapors
Air Tank
WHAT COULD HAPPEN
The compressor head and tubes get hot when
the air compressor is running. If you touch them,
you can be seriously burned.
it is normal for the motor's electrical contacts to
spark when the compressor starts or stops. A
spark can ignite flammable vapors from
gasoline, flammable paints or solvents and
cause a fire or explosion.
Compressed air can propel dust, dirt or loose
particles it comes in contact with.
Too much air pressure applied to air tools or
accessories can cause damage or risk of
bursting.
This compressor cycles automatically when the
switch is in the “On-Auto" position. If you
attempt repair or maintenance while the com
pressor is operating, or with the switch in the
“On-Auto” position, you can expose yourself to
moving parts. These moving parts can cause
serious injury or damage, if they come into con
tact with you or your clothing.
It is normal for compressed air to contain toxic or
irritating vapors. Such vapors are harmful if
inhaled.
Certain materials you are spraying (like paint,
weed killer, sand or insecticide) can be harmful
if you inhale them.
Modifications to the air compressor can cause
the air tank to rupture or explode.
Changing the air tank will cause it to weaken.
The tank can rupture or explode.
HOW TO PREVENT IT
Never touch the air compressor head or tubes dur
ing or immediately after operation.
Operate the compressor in well ventilated areas
that are free of gasoline, flammable paint or solvent
vapors.
if spaying a flammable material - provide ample
ventilation. Never spray in a dosed area. There
must be a flow of fresh art at all times.
Never point any nozzle or sprayer toward a person
or any part of the body.
Always wear safety goggles or glasses when using
the air compressor.
Always turn the air compressor off and release air
pressure from hose before attaching or removing
accessories.
Check the manufacturer’s maximum pressure rat
ing for air tools and accessories. Regulator outlet
pressure must never exceed the maximum pres
sure rating.
Always unplug the unit and release air pressure
from the tank and any accessories before doing
repair or maintenance.
Never operate the compressor with the belt guard
removed.
Never directly inhale the compressed air produced
by this unit.
Read labels and safety data for ail materials you
spray. Follow all safety precautions.
Use a mask or respirator if there is a chance of
inhaling toxic sprayed materials. Masks and
respirators have limits and will only provide protec
tion against some kinds and limited amounts of
toxic material. Read mask and respirator instruc
tions carefully. Consult with a safety expert or
industrial hygienist if you are not sure about the use
of a certain mask or respirator.
Do not adjust, remove or tamper with the safety
valve or pressure switch. If safety valve or pressure
switch replacement is necessary, a part with the
same pressure rating must be used.
For service replacement use only the motors, pul
leys and belts designed as standard service
replacement parts as indicated in the parts list.
Use of improper parts could cause overloading of
your unit and electrical supply.
Do not substitute a gas engine for the motor... this
compressor was not designed to be powered by a
gasoline engine.
Never replace the compressor pump with a differ
ent model.
Never increase the compressor pump speed.
Never drill into, weld, or in any way modify the air
tank. Do not repair a leaking tank, it must be
replaced.
Never replace the air tank with a different mode! or
a larger tank.
SPECIFICATION CHART
Model No.
Horsepower
Displacement CFM
Bore
Stroke
Voltage-Single Phase
Minimum Branch Circuit Requirement
‘Fuse Type
Air Tank Capacity - Gallons
Approximate Cut-in Pressure
Approximate Cut-out Pressure
SCFM (a) 40 psig
SCFM (a) 90 psig
SCFM ((V 100 psig
U.L. Listed
919.176730
3
11.3
2Vs" 2%"
2"
120/240“
15 amp“*
Fusetron
Type “T”
20
80
100
8.8
7.7
7.3
Yes
919.176830
3
11.3
2"
120/240“
15 amp*“
Fusetron
Type “T”
20 ASME
80
100
8.8
77
7.3
Yes
‘These models have dual voltage motors, 120 and 240 volt. They are WIRED FOR 120 VOLT but can be converted to 240
volt operation. Instructions for connecting the motor for operation at 240 volt can be found printed on the inside of the
motor cover or on the nameplate of the motor.
*A circuit breaker is preferred. Use only a fuse or circuit breaker that is the same rating as the branch circuit the air
compressor is operated on. If the air compressor is connected to a circuit protected by fuses, use dual element time
delay fuses (Buss Fusetron Type “T” only).
CAUTION
These air compressors can be operated on
a 15 amp circuit if:
1
. Voltage supply to circuit is normal.
2. Circuit is not used to supply any other
electrical needs (lights, appliances, etc.)
3. Extension cords comply with specifica
tions in owners manual.
4. Circuit is equipped with 15 amp circuit
breaker or 15 amp Fusetron Type “T” time
delay fuse.
If any of the above conditions cannot be met, or if opera
tion of the compressor repeatedly causes interruption of
the power it may be necessary to operate it from a 20
amp circuit. It is not necessary to change the cordset it
this change is required.
When converting this model to 240 volt opera
tion, the attached three-prong 120 volt plug
must be replaced with a three-prong 240 volt
plug (purchase locally) or order line cord Part
No. SUDL-404-1.
GLOSSARY
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute: a unit of meas
ure of air delivery.
PSIG: Pounds per square inch gauge; a unit of measure
of pressure.
ASME: American Society of Mechanical Engineers;
made, tested, inspected and registered to meet the stan
dards of the ASME.
U.L. Listed: Underwriter Laboratories; Samples of
compressor outfits, taken from production, were sub
mitted to U.L and found to comply with their require
ments for design and performance.
Cut-In Pressure: While the motor is off, air tank pres
sure drops as you continue to use your accessory. When
the tank pressure drops to a certain iow level the motor
will re-start automatically. The low pressure at which the
motor automatically re-starts is called “cut-in pressure.“
Cut-Out Pressure: When you turn on your cur compres
sor and it begins to run, air pressure in the air tank begins
to build. It builds to a certain high pressure before the
motor automatically shuts off - protecting your air tank
from pressure higher than its capacity. The high pres
sure at which the motor shuts off is called “cut-out
pressure.”
ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS
The following accessories are available through the current general sales catalog or at full-line Sears stores.
•SPRAY GUNS
•BLOW GUNS
•AIR CAULKING GUNS
•AIR POWERED WASHER GUNS
•SAND BLASTERS
•AIR BRUSHES
•AIR LINE FILTERS
•TIRE AIR CHUCKS
•PAINT TANKS
•AIR TANKS
•INFLATOR KITS
•QUICK CONNECTOR SETS
(various sizes)
•VISCOSIMETER
•AIR PRESSURE REGULATORS
•OIL FOG LUBRICATORS
•AIR TOOLS:
Sanders
Drills
Impact wrenches
Hammers
•AIR HOSE:
1/4", 5/16" OR 3/8" ID.
in various lengths.
GENERAL INFORMATION
You have purchased an air compressor unit consisting of
a 2 cylinder, single stage air compressor pump, an air
tank, air hose, wheels, handle, air chuck and associated
controls.
Your air compressor can be used for operating paint
spray guns, air tools, caulking guns, grease guns, air
brushes, sandblasters, power washers, inflating tires
and plastic toys, spraying weed killers, insecticides, etc.
An air line filter is usually required for removal of mois
ture and oil vapor in compressed air when a paint spray
gun is used.
DESCRIPTION OF OPERATION
PRESSURE
ON/OFF
regulator switch
OUTLET PRESSURE
GAUGE
SAFETY.^—-
VALVE
CHECK
VALVE
......
SWITCH
An in-line lubricator is usually required for air tools to
prolong tool life.
Separate air transformers which combine the functions
of air regulation and/or moisture and dirt removal should
be used where applicable.
These accessories can be purchased from most Sears
stores or through the Sears General catalog or Power
Tool catalog.
TANK
PRESSURE GAUGE
AIR COMPRESSOR
PUMP
Air Compressor Pump: To compress air, the pistons
move up and down in the cylinders. On the downstroke,
air is drawn in through the air intake filter and then
through the air intake valves. The exhaust valve remains
closed. On the upstroke of the piston, air is compressed.
The intake valves close and compressed air is forced
out through the exhaust valve, through the outlet tube,
through the check valve and into the air tank. Working air
is not available until the compressor has raised air tank
pressure above that required at the air outlet.
Check Valve: 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.
Pressure Release Valve: The pressure release valve
located on the side of the pressure switch, is designed to
automatically release compressed air from the com
pressor head and the outlet tube when the air compres
sor reaches “cut-out" pressure or is shut off. If the air is
not released, the motor will try to start, but will be unable
to. The pressure release valve allows the motor to re
start freely. When the motor stops running, air will be
heard escaping from the valve for a few seconds. No air
should be heard leaking from the valve when the motor is
running.
Safety Valve: If the pressure switch does not shut off the
air compressor at or near its cut-out pressure setting, the
safety valve will protect against high pressure by “pop
ping out” at its factory-set pressure (slightly higher than
the pressure switch cut-out setting).
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