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
.........................................................................
..............................................................................................
........
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).
Pressure Switch: The pressure switch automaticaily
starts the motor when the air 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: The air pressure coming from the air tank is
controlled by the regulator knob. Turn the knob
clockwise to increase pressure and counterclockwise to
decrease pressure. To avoid minor readjustment after
making a change in pressure setting, always approach
the desired pressure from a lower pressure. When
reducing from a higher to a lower setting, first reduce to
some pressure less than that desired, then bring up to
ASSEMBLY INSTRUCTIONS
Items You Will Need To Assemble Your Compressor
• 16 oz. compressor oil. Sears 9-16426 or SAE 20-20W
SF motor oil
• pipe thread sealant
• an adjustable wrench for attaching the pressure
regulator
• a 9/16" socket or open-end wrench for attaching the
wheels and hose adapter
• a 7/16" open-end wrench for attaching the air pressure
gauges
• a 3/16" hex key for installing the plug in the regulator
the desired pressure. Depending on the air requirements
of each particular accessory, the outlet regulated air
pressure might have to be adjusted while you are
operating the accessory.
Tank Pressure Gauge: The tank pressure gauge indi
cates the reserve air pressure in the tank.
Outlet Pressure Gauge: The outlet pressure gauge
indicates the air pressure available at the outlet side of
the reguiator. This pressure is controlled by the regulator
and is always less or equal to the tank pressure. See
“Operating Procedures.”
Installing Handle
WARNING
]
THE WHEELS HAi^lDLE DO NOT PRO
VIDE ADEQUATE CLEARAriCE. STAS?LITY
C.SR SOPPORT FOR PyUJMG THE Uf--J!T UP
Am DO\m smiHS or -step-s. the unit
MUST BE LiPTED OR PUSHED UP A fiAMP.
DO MOT LiFT THE Ul^iT BY THE MANIFOLD
A.SSEfyiBLy. THE UM!T CAM BE DAMAGED,
1 Insert the open end of the handle under the saddle (Fig.
1). Before attaching handle, you may have to pull the
open ends of the handle apart so they fit tightly against
the side of the saddle. Looking in from the open end of
the saddle, position the handle towards the two bent
tabs, on the inside walls of the saddle. Slowly push the
open ends of the handle onto both tabs at the same
time (Fig. 2). Continue pushing the handle into the sad
dle until the holes on the side of the saddle and handle
are in line.
2. Guide the straight end of each retaining clip through the
saddle hole and both handle holes (Fig. 3).
3. Rotate each retaining clip clockwise and press down
until it snaps into place over the puli handle (Fig. 4).
4. If the handle has excessive movement, it is improperly
installed. Check the following;
A. Are both tabs inside the handle (Step #1)?
B. Does each dip pass through both the saddle and
handle (Step #2)?
It may be necessary to brace or support one
end of the outfit when attaching the wheels
because the air compressor will have a
tendency to tip.
Installing Rubber Foot Strip and Wheels
1. Remove the protective paper strip from the adhesivebacked rubber foot strip. Attach the rubber foot strip to
the bottom of the air tank leg. Press firmly into place.
(See page 14 key no. 39.)
2. The leg bracket on the underside of the air compres
sor tank has 2 hoies on each side for mounting the
wheels. Place one shoulder bolt through the hole in a
wheel. Next, push the bolt through the LOWER hole of
the leg bracket and screw on one hex locking nut. The
special locking nut does not turn freely. Tighten the
nut firmly until it contacts the leg. See pg. 14. The
outfit will set level if the wheels are properly installed.
installing Tank Pressure Gauge
Apply pipe sealant (not supplied) to the gauge threads
and install in the threaded opening in front of the
manifold. Refer to photo on pg. 6.
Installing Regulator
(Top View)
Use a small amount of pipe thread sealant (not
supplied) on all pipe thread joints. Install the
regulator on the end of the manifold using the
short pipe nippie. The arrow on the bottom of
the regulator must point away from the manifold
in order for the regulator to function property.
Next, install the gauge, adapter and plug in the
regulator. The plug is supplied with the regulator.
INSTALLATION AND BREAK-IN PROCEDURES
Location of the Air Compressor
Operate the air compressor in a clean, dry and well
ventilated area. The air filter must be kept clear of
obstructions which could reduce air delivery of the air
compressor. The air compressor should be located at
least 12" away from wails or other obstructions that could
interfere with the flow of air through the fan bladed fly
wheel. The air compressor crankcase and head are
designed with fins to provide proper cooling.
If humidity is high, a Sears air filter can be installed on
the air outlet adapter to remove excessive moisture, and
oil vapor from the air. Closely follow the instructions
packaged with the filter for proper installation. It must be
installed as close as possible to the accessory.
Extension Cords
To avoid voltage drop and power loss to the motor, use
extra air hose instead of an extension cord.
If an extension cord must be used:
• use only a 3-wire extension cord that has a 3-blade
grounding plug and a 3-siot receptacle that will accept
the plug on the product.
• make sure the extension cord is in good condition.
• the extension cord should be no longer than 50 feet.
8
' the minimum wire size is 12 gauge (AWG), Sears #9-
83606, 12 gauge X 50' extension cord is available at
your local Sears Service Center. (Wire size increases
as gauge number decreases. 10 AWG and 8 AWG may
also be used. DO NOT USE 14 AWG or 16 AWG.)
Lubrication and Oil
CAUTION
Compressors are shipped without oil. Do
not attempt to operate this air compressor
without first adding oil to the crankcase.
Place unit on a level surface. Remove oil fill plug (Key no.
81, pg. 15) and slowly add a special compressor oil such
as Sears 9-16426 or SAE 20-20W SF motor oil until it is
even with the top of the oi! fill hole. (It must not be allowed
to be lower than %" - 6 threads down - from the top, at
any time.) When filling the crankcase, the oi! flows very
siowiy. If the oil is added too quickly, it will overflow and
appear to be full. Crankcase oil capacity is 16 fluid
ounces. Under winter-type conditions use SAE 10W oil.
Multi-viscosity oil, 10W 30, will leave carbon deposits on
critical components reducing performance and com
pressor life. Replace oil fill plug.
Grounding instructions
WARNING
Ì
IMPROPER GROUNDING CAN RESULT IN
ELECTRICAL SHOCK. IN THE EVENT OF A
SHORT CIRCUIT, GROUNDING REDUCES
THE RISK OF SHOCK BY PROVIDING AN
ESCAPE WIRE FOR THE ELECTRIC CUR
RENT. THIS AIR COMPRESSOR MUST BE
PROPERLY GROUNDED.
1. The air compressor is equipped with a cord having a
grounding wire and an appropriate grounding plug.
The plug must be used with an outlet that has been
installed and grounded in accordance with all local
codes and ordinances. The outlet must have the
same configuration as the plug. DO NOT USE AN
ADAPTER.
2. Do not modify the plug that has been provided. If it
does not fit the available outlet, the correct outlet
should be installed by a qualified electrician.
3. Inspect the plug and cord before each use. Do not use
the compressor if there are signs of damage.
ADANGER
ELECTRICAL SHOCK HAZARD. WHEN
REPAIRING OR REPLACING THE CORD OR
PLUG, KEEP THE GROUNDING WIRE SEPA
RATE FROM THE CURRENT-CARRYING
WIRES. NEVER CONNECT THE GROUND
ING WIRE TO A FLAT BLADE PLUG TER
MINAL. (THE GROUNDING WIRE HAS
INSULATION WITH AN OUTER SURFACE
THAT IS GREEN - WITH OR WITHOUT YEL
LOW STRIPES.)
OPERATING
1. Before attaching an air hose or accessory, make
sure the pressure switch lever is in the “OFF” posi
tion. Close the air regulator outlet by turning it
counter-clockwise.
2. Attach hose and accessory.
WARNING
1
TOO MUCH AIR PRESSURE CAUSES A
HAZARDOUS RISK OF BURSTING. CARE
FULLY FOLLOW STEPS 3 THROUGH 12
EACH TIME THE COMPRESSOR IS USED.
Check the manufacturer’s maximum pressure rating
for air tools and accessories. The regulator outlet
pressure must never exceed the maximum pressure
rating.
CAUTION
Compressed air from the outfit may contain
water condensation and oil mist. Do not
spray unfiltered air at an item that could be
damaged. Some air operated tools or
devices may require filtered air. Read the
1-1^0
If these grounding instructions are not completely
understood, or if you are not sure your compressor is
properly grounded, have the installation checked by a
qualified electrician.
OUTLET
PLUG
Break-in Procedures
Serious damage may result if the following
break-in instructions are not closely
followed.
This procedure is required only once, before the air com
pressor is put into service.
1. Set the pressure switch lever to the “OFF” position.
2. Plug the power cord into the correct branch circuit
receptacle.
3. Turn the regulator clockwise opening it fuiiy, to prevent
air pressure build-up in the tank.
4. Move the pressure switch lever to “ON/AUTO”. The
compressor will start.
5. Run the compressor for 30 minutes. Make sure the
regulator is open and there is no tank pressure build
up.
6. After 30 minutes, close the regulator by turning it
counter-clockwise. The air receiver will fill to cut-out
pressure and the motor will stop. The compressor is
now ready for use.
PROCEDURES
4. Turn the pressure switch lever to the “ON-AUTO”
position and allow tank pressure to build. The motor
will slop when tank pressure reaches cut-out
pressure.
5. Open the regulator by turning it clockwise. Adjust the
regulator to the correct pressure setting. (See pg. 6
for regulator instructions.) Your outfit is ready for use.
When You Are Finished:
6. Set the pressure switch lever to “OFF”.
7. Turn the regulator counter-clockwise and set the out
let pressure to zero.
8. Remove the air too! or accessory.
9. Open the regulator and allow the air to slowly bleed
from the tank. Close the regulator when tank pres
sure is approximately 20 psi.
10. Drain water from air tank.
WAiNÎNG
J
WAT£ft mti comEHSE m the air
IF MOT CHAINED, WATER WILL CORRODE
Af^D WEAKEN THE AIR TANK, CAtJSir^G 4
BISK OF AIR TAI-IK RUPTOBE.
11. With tank pressure at approximately 20 psL, open
the drain cock (key 43, pg. 14) and allow moisture to
drain. Turn drain T-handie counterclockwise to open.
The drain cock is located under the outfit near the
leg without the wheels. (See pg. 6.)
MAINTENANCE
UNIT CYCLES AUTOMATICALLY WHEN POWER IS QH. WHEN DOING MAiNTEMAisICE, VOO
BE EXPOSED TO VOLTAGE SOURCES. COMPRESSED AiP. OR MQWm PARTS. PERSDHAL
INJURIES CAN OCCUR. BEFORE PERFORMiNG MAINTENANCE OR REPAIR UNPLUG THE UU l'T
AND BLEED OFF ALL AIR TANK PRESSURE. NEVER OPERATE THE UNIT WITH THE BELT
GUARD REMOVED.
Air Compressor
A dean air compressor runs cooler and provides longer
service. Clean or blow off fins and any other parts of the
air compressor that collect dust or dirt. Do not place
rags, containers or other material on or against the venti
lation openings in the belt guard. Adequate ventilation is
necessary to maintain proper air compressor operating
temperature.
Air Filter - inspection and Replacement
NOTE
Keep the air filter clean at all times. Do not oper
ate the compressor with the air filter removed.
A dirty air filter will not allow the compressor to operate
at full capacity. Before you use the compressor, check
the air fitter to be sure it is dean.
If it is dirty, replace it with a new filter. The filter may be
removed by using a pair of needle nosed pliers or a
screwdriver. Puli or pry out the old filter. Push in the new
air filter.
Oil - Checking and Changing
CAUTION
Overfilliog with oil will cause premature
compressor failure. Do not overfill.
Check oil level in the crankcase daily. Remove the oil fill
plug (Key no. 81, pg. 15). The oil level should be even
with the top of the fill hole and must not be allowed to be
lower than %" from the top (6 threads) at any time. It is
recommended that the oil be changed after every 100
hours of operation. To drain the oil, remove the oil drain
plug and collect the oil in a suitable container. Be sure to
replace the plug securely before adding new oil. Use a
special compressor oil such as Sears 9-16426 or SAE
20-20W SF motor oil. (Crankcase oil capacity is 16 fluid
NOTE
If the drain cock valve is plugged, release all air
pressure. The valve can then be removed,
Scteaned, and reinstalled.
12. After the water has been drained, close the drain
cock (turn clockwise). The air compressor can now
be stored.
WARNING
1
ounces.) Under extreme winter conditions use SAE
low. Multi-viscosity oil (10W30) will leave carbon
deposits on critical components which will reduce per
formance and compressor life.
Check Valve - Replacement
1 • Release air pressure from the air tank.
2. Loosen the top and bottom tube nuts and remove the
outlet tube.
3. Unscrew the check valve (turn counter-clockwise)
using socket wrench.
4. Check that the valve disc moves freely and that the
spring holds the disc in the upper, closed position.
The check valve may be cleaned with a solvent such
as paint thinner or carburetor cleaner.
5- Apply sealant to the check valve threads. Reinstall the
check valve (turn clockwise). Do not over tighten.
6. Replace the outlet tube and tighten top and bottom
tube nuts.
Safety Valve - inspection
WARNING
]
IF THE SAFETY VALVE DOES MOT WORK
PROPERLY OVER-PRESSURIZATSOM MAY
OCCUR, CAUSING AIR TANK RUPTURE OR
EXPLOSION. OCCASiONALLV PULL THE
RING ON THE SAFETY VALVE T'O MAKE
SURE THAT THE SAFETY VALVE OPER
ATES FREELY IF THE VALVE iS STUCK OP
DOES i^OT OPERATE SMOOTHLY IT MUSIBE REPLACED WITH A VALVE HAVIHG THF
SAME PRESSURE Rm U G.
Motor
The motor has a manual thermal overload protector. If
the motor overheats for any reason, the overload protec
tor will shut off the motor. The motor must be allowed to
cool down before restarting. Turn the unit off. To restart,
depress the red reset button located on the end of the
motor and turn the unit on.
0
NOTE
if the overload protector shuts the motor off fre
quently, check for a possible voltage problem.
Low voltage can also be suspected when:
1. the motor does not get up to full power or
speed;
2. fuses blow out when the motor is started.
3. lights dim when motor is started, and remain
dim while it is running.
Belt - Replacement
WARNING
]
SERIOUS INJURY OR DAMAGE MAY
OCCUR IF P A R TS OF THE BODY GR LOOSE
¡JE M S GET CAUGHT M MOViNG PARTS.
MEVER OPERATE THE OOTFiT WITH THE
BELT GUARD REMOVED. THE BELT GUARD
SHOULD e-E REMOVED ONLY WHEN THE
COMPRESSOR IS
To Replace Belt:
1. Unplug compressor.
2. Remove the front of the belt guard by disengaging the
snaps, insert a fiat biaded screwdriver at each snap
location and pry the beitguard apart.
3. The motor is mounted on a special base. By loosening
the wing nut at the motor hold down plate, the motor
can be tilted to allow for easy removal of the belt.
4. Remove belt and replace.
NOTE
The belt must be centered over the grooves on
the flywheel and motor pulley.
5. Tighten the wing nut until It makes contact with the
washer plus one additional turn.
6. Replace the front of the beitguard.
To Adjust Belt Tension:
Tighten the wing nut until it makes contact with the
washer plus one additional turn.
Pulley and Flywheel - Alignment
The compressor flywheel and motor pulley grooves
must be in-line {in the same plane) within 1 /32" to assure
belt alignment within grooves. To check alignment, dis
connect electrical power and remove the beitguard.
Place a straightedge against the outside of the flywheel
and measure the distance from it to the nearest groove.
Alignment is achieved when the other end of the straigh
tedge is within 1/32" of the measured dimension at the
pulley grooves.
STORAGE
Before You Store The Air Compressor:
1. Review the “Maintenance” section on the preceding
page and perform maintenance as necessary. Drain
the water from the air tank.
2. Set the OFF/AUTO switch to the “OFF" position, and
unplug the unit.
TROUBLESHOOTING GUIDE
WARNING
FEnFOPMIf-iG 5T£PA!RS EXPOSE VOLTAGE SOURCES, MOVilsG FARTS, OR COMPRESSED
AIR SCURCES. PERSONAL hUIURY MAY OCCUR. PRIOR TO AJ T EP M Pi mG AM T REPAIRS THE
COMPRESSOR MUST BE UNPLUGGED, AND AiR TANK PRESSURE RELIEVED. NEVER OPERATE
THE UNIT WITH THE BELT GUARD REMOVED.
PROBLEM
Excessive tank pressure safety valve pops off.
CAUSE
Pressure switch does not shut off
motor when compressor reaches
“cut-out” pressure.
3. Remove the air tool or accessory.
4. Protect the electrical cord and air hose from damage
(such as being stepped on or run over}. Wind them
loosely around the outfit handle.
5. Store the compressor in a clean and dry location.
1
CORRECTION
Move the pressure switch lever to the “OFF” posi
tion. if the outfit doesn’t shut off, and the electrical
contacts are welded together, replace the pressure
switch.
!f the contacts are good, check to see if the pin in
the bottom of the pressure relief valve is stuck, if it
does not move freely, replace the valve.
Air leaks at fittings
Pressure switch “cut-out” too
high.
Tube fittings are not tight enough.
Return the outfit to the Sears Service Center to
check and adjust or replace switch.
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. DO NOT
OVER-TIGHTEN.
TROUBLESHOOTING GUIDE (continued)
PROBLEM
Air leaks at check valve
Air leaks at pressure
switch release valve
Air leaks in air tank
Air leaks from safety valve
Regulator knob - continu
ous air leak. Regulator will
not shut-off at air outlet.
Knocking noise
CAUSE
Defective or dirty check valve.
Defective pressure switch
release valve.
Defective check valve.
Defective air tank.
Possible defect in safety valve
Dirty or damaged regulator inter
nal parts.
Defective check valve.
CORRECTION
A defective check valve results in a constant air
leak at the pressure release valve when there is
pressure in the tank and the compressor is shut off.
Remove and clean, or replace check valve. DO
NOT OVER-TiGHTEN.
Remove and replace the release valve.
A defective check valve results in a constant air
leak at the pressure release valve when there is
pressure in the tank and the compressor is shut off.
Remove and clean, or replace check valve. DO
NOT OVER-TIGHTEN.
Air tank must be replaced. Do not repair the leak.
WARNING
DO NOT DRILL INTO, WELD, OR OTHER
WISE MODIFY AIR TANK OR IT WILL
WEAKEN.
Operate safety valve manually by pulling on ring. If
valve still leaks, it should be replaced.
Clean or replace regulator, or internal parts.
Remove and clean, or replace.
Compressor is not supply
ing enough air to operate
accessories.
Loose pulley.
Low oil level.
Loose flywheel.
Loose compressor mounting
screws.
Loose belt.
Carbon build up.
Prolonged excessive use of air.
Compressor is not large enough
for air requirement.
Restricted air intake filter.
Tighten pulley set screw, (70-80 In.-Lbs.).
Maintain prescribed oil level. Add oil.
Tighten screw. 15 to 20 ft. lbs.
Check screws. Tighten as required, (15-20 Ft.-
Lbs.).
Tighten wing nut on motor mount until it contacts
the washer, plus one more turn.
Remove the head and valve plate. Clean the valve
plate and the top of the piston. (Be sure carbon
does not fat! into the cylinder.) Reassemble using
new gaskets and torque screws, 25 to 30 ft. lbs.
Decrease amount of air usage.
Check the accessory air requirement. If it is higher
than the SCFM or pressure supplied by your air
compressor, you need a larger compressor.
Clean or replace air intake filter. Do not operate the
compressor in the paint spray or sand blasting
area.
Hole in hose.
Check valve restricted.
Air leaks.
Check and replace.
Remove and clean, or replace.
Tighten fittings. (See Air Leaks section of
Troubleshooting Guide, Pg. 11.)
TROUBLESHOOTING GUIDE (continued)
PROBLEM
Excessive beit wear
Squealing sound
Motor will not run
CAUSE
Loose belt.
Tight belt.
Loose pulley.
Pulley misalignment.
Loose belt.
There is no oil in the compressor.
Motor overload protection switch
has tripped.
Possible defective capacitor.
Tank pressure exceeds pressure
switch “cut-in” pressure.
Wrong gauge wire or length of
extension cord.
CORRECTION
Adjust tension. See Belt Replacement, pg. 11.
Adjust tension. See Belt Replacement, pg. 11.
Check for worn keyway or pulley bore. Also check
for bent motor shaft. Replace parts if necessary.
Motor pulley and flywheel must be in line within
1/32".
Adjust tension. See Belt Replacement, pg. 11.
Add oil.
Let motor cool off and reset switch by pressing the
red button located on the end of the motor.
Return to Sears Service Center for inspection or
replacement if necessary.
Motor will start automatically when tank pressure
drops below “cut-in” pressure of pressure switch.
Check for proper gauge wire and cord length.
Pressure reading on the
regulated pressure gauge
drops when an accessory is
used.
Check valve stuck open.
Loose electrical connections.
Paint spray on internal motor
parts.
Possible defective motor.
Fuse blown, circuit breaker
tripped.
Pressure release valve on pres
sure switch has not unloaded
head pressure.
it is normal for "some” pressure
drop to occur.
Remove and clean, or replace. DO NOT OVER
TIGHTEN.
Unplug the compressor. Check wiring connection
inside pressure switch and motor terminal box
area.
Have checked at Sears Service Center. Do not
operate the compressor in the spray area.
Have checked at a local Sears Service Center.
1. Check fuse box for blown fuse and replace if
necessary. Re-set circuit breaker. Do not use a
fuse or circuit breaker with higher rating than
that specified for your particular branch circuit.
2. Check for proper fuse; only Buss Fusetron Type
“T" fuses are acceptable.
3. Check for low voltage conditions and/or proper
extension cord.
4. Remove check valve and clean or replace if it is
stuck open or closed.
5. Disconnect the other electrical appliances from
circuit or operate the compressor on its own
branch circuit.
Bleed the line by pushing the lever on the pressure
switch to the “CFF" position; if valve does not
open, replace it.
If there is an excessive amount of pressure drop
when the accessory is used, adjust the regulator
following the instructions on pg. 6.
Note
Adjust the regulated pressure under flow
conditions (while the accessory is being
used). .
12
AIR COMPRESSOR DIAGRAM
(view from back)
14
37 (Model No, shown here)
(See pg. 8, Step 2 for proper
wheel placement and assembly)
COMPRESSOR PÜMP DiäGRÄ^
62
Г'“
Э1
✓ 6
47
48
49
50
51
51A
52
53
54
KEY
NO.
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
28A
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
1
2
3
4
5
PART NUMBER
CAC-322
CAC-323
SSF-8113-ZN
CAC-327
CAC-4003-1
9-16279
265-18
SSF-935
LA-1779
STD575051
STD575050
CAC-317
TIA-4325
TIA-4125
C-GA-345
STD575026
STD575025
CAC-387
CAC-1012
CAC-4296
H-2099
SS-2071
CAC-1013
SS-3222-CD
CAC-366
SUDL-403-1
SSW-7367
LA-1531-1
CAC-4220-1
KK-4315
CAC-4215-1
SS-1287
CAC-437
SSF-928
STD541631
LA-1535
CAC-320
LA-1814
LA-1932-2
LA-1933
CAC-1059
SUDL-6-1
CAC-60
CAC-4293
STD541437
SS-2707
Not Available
TA-4099
TA-4072
LA-1555
CAC-287
LA-1811-1
MO-6340
C-PU-2865
SS-391
LA-1978
STD580104
SSF-986.
LA-1931
PARTS LIST
DESCRIPTION
Belt guard, outside
Belt guard, inside
Lock nut
Bracket
Compressor pump assembly
Includes Key No. 59 through 93 inclusive.
Intake filter - package of 2 (1 used)
Filter retainer
Screw, #8-32 x 3/8 (2 used)
Hot Surface Label {2 used)
Ferrule (2 used for 1/2" O.D. Tube)
Nut (2 used for 1/2" O.D. Tube)
Outlet tube
Safety valve (model 919.176730)
Safety valve ASME (model 919.176830)
Pressure gauge (2 used)
Ferrule (2 used for 1/4" O.D. Tube)
Nut (2 used for 1/4" O.D. Tube)
Pressure release tube
Hold down plate
Pressure regulator
Adapter
Nipple
Hold down screw
Pipe plug
Manifold
Cord assembly
Strain relief (2 used)
Label
Pressure switch
Pressure release valve and mounting nut (Included with #28)
Motor cord assembly
Nipple
Check valve
Screw 5/16 -18 X 7/8" (4 used)
Wing nut
Warning label
Handle
Periodic maintenance label ,
Specification label (Model 919.176730)
Specification label (Model 919.176830)
Retaining clip (2 used)
Rubber foot strip
Shoulder bolt (2 used)
8" wheel (2 used)
Lock nut (2 used)
Drain cock
Code number label
Air tank, 20 gallon (Model 919.176730)
Air tank, 20 gallon ASME (Model 919.176830)
Label-120V wired
Motor pin
Sears Craftsman label
Motor, 3 HP
Motor pulley
Set screw
Drain Tank Daily Label
Motor shaft key (3/16 x 3/16" x 1 %")
Seif-tapping screw (2 used)
Label
1
55 C-BT-222
56 SSN-1619-ZN
57 SSN-56-ZN
58 C AC-1 oil
59 SSF-6627
60
61 SSF-955
62 SS-8553
63 SSP-9401
✓ 64 CAC-291
• 65
• 66
67
• 63 265-196
69 CAC-289
✓ 70
+ 71
+ 72
4> 73
74
75 265-19
76 CAC-207
77
78 SSF-927
79 CAC-51
80 265-41
81
82 SSF-925
83 265-3
✓ 84 265-16
85 CAC-373
86
✓ 87 265-13
88
89 265-2
90 SSN-1014-ZN
91
✓ 92 265-111
✓ 93 265-6
CAC-293
265-25
SSF-9821
CAC-294
CAC-54-1
CAC-56
CAC-58
CAC-57
CAC-55
265-410
SSP-1413
265-23
265-9
STD523107
Poly-V-Belt, 38" long
Lock washer
Fiat washer
Elastomer spring
Stud 3/8" X 16 both ends (2 used)
Head
Screw, 3/8'-16 X 1-1/2" (4 used)
Adapter
Adapter
Head gasket
intake flapper valve - square corners
(2 used on head)
Screw #5-40 x Vd' (8 used)
Restrictor plate (2 used)
Exhaust flapper valve - beveled corners
(2 used on valve plate)
Valve plate
Valve plate gasket
Compression ring (4 used)
Oil ring (4 used)
Oil ring expander (2 used)
Piston (2 used)
Piston pin (2 used)
Piston pin plug |4 used)
Connecting rod assembly (2 used) Includes two SSF-927 screws. Key #78.
Screw, 1 /4"-20 x 1-1/8" (4 used)
Crankcase and cylinder
Needle bearing
Pipe plug {2 used)
Screw, 1/4"-20 x 7/8" (12 used)
Base
Base gasket
Crankshaft
Needle bearing
End plate gasket
End Plate
Flywheel
Belleville washer
Cap screw
Seal
Vent filter
NOT ILLUSTRATED
9-16269
9-16163
SI-30-14-4-D
+ Key No. 71, 72 and 73, only available in Ring Kit KK-4313
✓ Key No. 6, 64, 70, 84, 87, 92 and 93, available as Individual parts and part of Gasket Kit KK-4312-2.
• Key No. 65, 66 and 68, only available In Valve Kit KK-4275.
Air chuck
Air hose assembly (1/4" LD, x 15')
Owners manual
SBAm
OWNERS
MANUAL
SERVICE
MODEL NO.
919.176730
919176830
HOW TO ORDER
REPAIR PARTS
I CRAFTSMAN AIR COMPRESSOR
Now that you have purchased your Sears Air Compressor, should a
need ever exist for repair parts or service, simply contact any Sears
Service Center and most Sears, Roebuck and Co. stores. Be sure
to provide all pertinent facts when you call or visit.
The model number of vour Sears Air Compressor is 919
This number can be found on the maintenance label which is
located on the rear of the air tank.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE
FOLLOWING INFORMATION;
SI-30-14-4-D
• PART NUMBER • PART DESCRIPTION
• MODEL NUMBER • NAME OF ITEM
If service or repair parts are required for the motor, supply all motor
nameplate information including manufacturers name.
All parts listed may be ordered from any Sears Service Center and
most Sears stores.
If the parts you need are not stocked locally, your order will be elec
tronically transmitted to a Sears Repair Parts Distribution Center for
handling.
Sears, Roebuck and Co., Chicago, IL 60684 Ü.S.A.
6/89 Printed in U.S.A.
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