Craftsman 919175261 User Manual AIR COMPRESSOR Manuals And Guides L0803613

CRAFTSMAN Air compressor Manual L0803613 CRAFTSMAN Air compressor Owner's Manual, CRAFTSMAN Air compressor installation guides

User Manual: Craftsman 919175261 919175261 CRAFTSMAN AIR COMPRESSOR - Manuals and Guides View the owners manual for your CRAFTSMAN AIR COMPRESSOR #919175261. Home:Tool Parts:Craftsman Parts:Craftsman AIR COMPRESSOR Manual

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Page Count: 16

SEARS

OWNERS

MANUAL

MODEL NO.

919.175261

Usted

721Y

Air

Compressor

iMPORTANT:

Read the Safety Guidelines

and Al! instructions

Carefully Before Operating

[ 8t9

ONE STAGE

AiR COIVIPRE= OR

ASSEMBLY

0PERATION

MAINTENANCE

REPAIR PARTS

Record in the spaces provided.

(1) The model number which can be found

on the label on the front of the air tank

saddle.

(2) The code number which can be found

on the foil label on the side of the air

tank.

(3) The Manufacturer's Number (ASME

Code Compressors only} is located on

the metal data plate which is welded

onto the side of the air tank. (This data

plate is painted the same color as the

tank.)

(4} The Motor Manufacturer's name which

is located on the motor label.

(5) The Motor Mfg. number - also located

on the motor _abel.

Retain these numbers for future refer-

once,

Model No.

Code No.

Mfg. No.

Motor Mfg. Name

Motor Mfg. No.

Sears, Roebuck and Coo, Chicago, IL 60684 U.S.A,

Page

WARRANTY ........................................................................... 2

SAFETY GUIDELINES ............................................................... 3

WARNING CHART ................................................................... 3

SPECZFICATION CHART ........................................................... 5

GLOSSARY ............................................................................ 5

ACCESSORIES FOR USE WITH

SEARS AIR COMPRESSORS ................................................ 5

GENERAL INFORMATION ......................................................... 6

DESCRiPTiON OF OPERATION .................................................. 6

iNSTALLATION AND 8REAKqN PROCEDURES ............................ 6

Location of Air Compressor ................................................. 6

Piping .............................................................................. 7

Lubrication and Oil ............................................................. 7

Wiring _nstructions ............................................................. 7

Wiring Diagram .................................................................. 7

8reakqn Procedures ........................................................... 8

OPERATING PROCEDURES ....................................................... 8

MAINTENANCE ...................................................................... 8

Air Compressor ................................................................. 8

Air Filter - inspection and Replacement ................................. 8

Oil - Checking and Changing ............................................... 9

Air Tank - Draining Water ................................................... g

Check Vatve- Inspection and RepJacement ............................ 9

Safety Valve inspection ...................................................... £

Motor .............................................................................. 9

Belt - Replacement ............................................................. 9

PuJte¥ and Ftywheel - Alignment .......................................... I0

TROUBLESHOOTING GUIDE ..................................................... 10

AIR COMPRESSOR DIAGRAM .................................................. 12

Parts List .......................................................................... 13

COMPRESSOR PUMP D_AGRAM ............................................... 14

Parts List .......................................................................... 15

HOW TO ORDER REPAIR PARTS ............................................... 16

FULL ONE YEAR WARRANTY

ON AiR COMPRESSORS

8fthis air compressor fai_sdue to a defect in materia_or workmanship whhin 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.

This warrant,/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!731CR-2_ Chicago, _L 60684

This manualcontainsinformation that is important for you to kno_v and understand. This

information relates to protecting your safety and preventing equipmenlt problems. To help you

recognize this information, we use the following symbols. Please read the manuat end pay special

attention to sections headed by these symbo!so

iMPORTANT SAFETY iNFORMATiON oA

HAZARD THAT MIGHT CAUSE SERIOUS

iNJURY OR LOSS OF LIFE.

Information for preventing damage to equip-

ment.

NOTE

Information that you should pay special at-

tention to.

HAZARDS CAN OCCUR iF EQUIPMENT 1S NOT USED PROPERLY.

PLEASE READ THE FOLLOWING CHART.

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

and pressure switch contacts to spark when the

compressor starts or stops. A spark can ignite

flammable vapors from gasoline, flammable paints

or solvents, causing an explosion or fire.

WHAT TO

LOOK FOR WHAT COULD HAPPEN

Hot Parts

Flammable

Vapors

Unsuitable

Solvents

Compressed Air

The soJvents 1,1,1-Trichlorethane and Methyl-

ene Ch!oride can chemically react with amumi-

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.

Compressed air can propel dust, dirt or tease

particles it comes in contact with.

Too much airpressure appliedto airtoo_sor

accessoriescan cause damage or riskof burst-

_ng.

HOW TO PREVENT IT

Never touch the air compressor head or tubes

during or immediately after operation.

Operate the compressor in well ventilated

areas that are free of gasoline, flammable paint

or solvent vapors.

if spraying aflammable material - provide

ample ventilation. Never spray in aclosed area.

There must be a flow of fresh air at all times.

Do not operate the compressor in the spray

area.

if the material you intend to spray contains the

solvents listed at left (read the label or data

sheet}, do not use accessories that contain

aluminum or galvanized parts. You must either

change the material you intend to spray, or use

only stainless steel spray equipment.

Never point any nozzle or sprayer toward a

person or any partof the body.

AEways wear safety goggles or g!ssses when

using the air compressor.

Always turn the air compressor off and release

a}r pressure from hose before attaching or

removing accessories.

Check the manufacturer's maximum pressure

rating for tools and accessories. The regulator

outte_ pressure must never exceed the maxi-

mum pressure rating.

WHAT TO

LOOK FOR

Electricity

Moving Parts

Toxic Vapors

Air Tank

Vibration

WHAT COULD HAPPEN HOW TO PREVENT IT

Your air compressor is powered by eiectricityo

Like any othar eJectricaiJy powered device, if it is

not used proper_y it can cause electrical shock.

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 coma into

contact with you or your cgothing.

It is normal for compressed air to contain toxic or

irritatingvapors. Such vapors are harmful if

inhaJed.

Certain materials you are spraying (like paint,

weed killer, sand or insecticide) can be harmful

if you inhate 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.

If your compressor is not properiy anchored it

will vibrata. Excessive vibration can cause tank

rupture or explosion.

Always turn off and lock out electrical power

3riot to maintenance or repair.

Wiring of the pressure switch, motor and On/

Off switch should be done by alicensed elec-

trician in accordance with national and local

codes.

Always turn off and lock out power before

repair or maintenance.

Never operate the compressor with the belt

guard removed.

Never diractJy inhale the compressed air pro-

duced by this unit.

Read labels and safety data for aHmaterials you

spray. Follow atl safety precautions.

Use amask or respirator if there is a chance of

inhaling toxic sprayed materials. Masks and

respirators have limits and will only provide

protection against some kinds and limited

amounts of toxic material. Raad mask and

respirator instructions carefultyo Consult with a

safety expert or industrial hygienist if you are

not svre 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

_art with the same pressure rating must be

used.

Never usa amotor with a higher horsepower

rating than the one supplied.

Do not substitute a gas engine for the

motot...this compressor was not designed to

ba powered by a gasomina engine.

Never replace the compressor pump with a

different 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

rapmacad.

Never replace the air tank with a different

model or a larger tank.

Make sure your sir compressor is bolted to the

floor. Sea "Location of the Air Compressor" in

this manual.

SPECIFICATION CHART J

Model No.

Horsepower

Displacement CFM at Max. Pressure

Bore

Stroke

Voltage -Single Phase

Minimum Branch Circuit Requirement

•Fuse Type

Amperage at Max. Pressure

Air Tank Capacity -Gallons

Approximate Cut-in Pressure

Approximate Cut-out Pressure

SCFM @!25 psig

SCFM @90 psig

SCFM @ 40 psig

UL Usted

919.175261

27/8

220

20 amp

Fusetron Type "T"

60 gal ASME

100 psig

125 psig

9.2

10.2

12.5

Yes

• 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.

iGLOSSARY I

CFM: Cubic feet per minute.

SCFM: Standard cubic feet per minute; a unit of

measure of air delivery.

PSlG: Pounds per square inch gauge; a unit of

measure of pressure.

Cut-Out Pressure: When you turn on your air com-

pressor 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 pressure at which the motor shuts

off is called "cut-out pressure."

ASME: American Society of Mechanical Engineers;

made, tested, inspected and registered to meet the

standards of the ASME.

UL Listed: Underwriters Laboratories; samples of

compressor outfits taken from production were sub-

mitted to UL and found to comply with their require-

ments for design and performance.

Cut-In Pressure: While the motor is off, air tank

pressure drops as you continue to use your acces-

sory. When the tank pressure drops to a certain low

level the motor will re-start automatically. The low

pressure at which the motor automatically re-starts

is called "cut-in pressure."

To Lock-Out Power: Place a lock on the line power

switch so no one else can turn on the power.

:ESSORIES 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 • PAINT TANKS • AiR TOOLS

•BLOW GUNS • AIR TANKS Sanders

•AIR CAULKING GUNS • iNFLATOR KITS Drills

•AIR POWERED WASHER GUNS •QUICK CONNECTOR SETS Impact Wrenches

• SAND BLASTERS (various sizes) Hammers

• AIR BRUSHES • VISCOSIMETER ® AiR HOSE:

• AIR LINE FILTERS • AIR PRESSURE REGULATORS 1/4", 5t16" OR 3/8" I.D.

• TIRE AIR CHUCKS = OIL FOG LUBRICATORS in various lengths

Youhavepurchasedanair compressor unit consist* spraying weed killers, insecticides, etc. An air pras-

ing of a 2 cy!inder, single stage air compressor pump, sure regulator is usually necessary for most of these

an ASME air tank, associated controls and instru- applications. Regulators can be purchased from most

ments. This air compressor must be permanently Sears stores or through the Sears General Catalog or

mounted in place. Power Toot Catalog.

Your aircompressor can be used foroperatingpaint

spray guns, air tooJs, cauJking guns, grease guns, air

brushes, eandblasterso inflating tires and pJastio toys,

Separate airtransformerswhich combine the func-

tions of sir regulation and/or moisture and dirt

removat should be used where applicable.

Air Compressor Pump: To compress air, the pistons

move up and down in the cy!inders. On the

downstroke, air is drawn in through the air intake

filter and then through the air intake valves. The

exhaust vatve remains closed. On the upstroke of the

piston, air is compressed. The intake valves close and

compressed airisforced out through the exhaust

valve, through the outlet tube, through the check

valve and intothe 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 airto

enter the air tank. When the air compressor reaches

"cut-out" pressure, the check valve "doses," eJlow-

ing air pressure to remain inside the air tank. If the air

is not unloaded, the motor will try to start, but vviil be

unable to. The check vane allows the motor to re-

start freeJy.

Pressure Switch: The pressure switch automatically

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.

Pressure Release Valve: The pressure release vane is

designed to automatically release compressed air

from the compressor head and the outlet tube when

the air compressor reaches "cut-out = pressure or is

shut off. ff the air is not released, the motor will try

to start but will be unable to. The pressure release

valve allows the motor to restart freely. When the

motor stops running, air will be heard escaping for a

few seconds. No air should be heard leaking when the

motor is running.

Safety Valve: ffthe 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 "popping out" at its factory set pressure

(slighdy higher than the pressure switch cut-out

setting).

Location of the Air Compressor

Operate the air compressor in aclean, dry and we]]

ventilated area. The air intake filter must be kept dear

of obstructions which couJd reduce air delive_ of the

aircompressor.The aircompressor shouldbe located

at least 12" away from wales or other obstructions

that could interfere with the flow of air through the

fan bladed flywheel The air compressor crankcase

and head are designed wi_h fins to provide proper

cooling. If humidity is high, aSears sir filter can be

installed on the air outlet adapter to remove exces-

sive moisture.

The air compressor shouJd be as near to air outlets es

possible in order to avoid long pipe lines. Do not place

the air compressor where heat is excessive.

INSTALLATION AND BREAK-IN PROCEDURES {Cont.)

EXCESSIVE VIBRATION MAY WEAKEN THE

AIR TANK AND CAUSE AN EXPLOSION.

THE OUTFIT MUST BE MOUNTED AS DE-

SCRIBED AND ILLUSTF_TED BELOW.

I. The air compressor must be bolted to the floor.

Bolting holes are provided in the base feet.

2. Mount the air compressor on a solid level foun-

dation with no strain to the air tank feet° Solid

shims may be used if necessary.

Piping

Plastic or PVC pipe is not designed for use

with compressed air. Regardless of its indi-

cated pressure rating, plastic pipe can burst

from air pressure. Use only metal pips for air

distribution lines.

If apipe line is necessary, use pipe that is the same

size as the air tank valve. Piping that is too small will

restrict the flow of air. if piping is over 100 feet tong,

use the next larger size. Bury underground lines

below the frost line and avoid pockets where conden-

sation can gather and freeze. Apply pressure before

underground lines are covered to make sure aU pipe

joints are free of leaks.

Lubrication and Oil

Compressors are shipped without oil Do not

attempt to operate this air compressor with-

out first adding oil to the crankcase.

Place unit on a level surface. Remove oil fin plug and

slowly add a special compressor oit such as Sears 9o

18428 or SAE-20-20W SF motor oil until it is even

with the top of the oil fin hole. (It must not be allowed

to be lower than 3/8" - 6 threads down - from the

top.) When filling the crankcase, the oil flows very

slowly. If the oHis added too quickly, it will overflow

and appear to be full. (Crankcase oil capaciW is 16

fluid ounces.) Under winter-type conditions use SAE

10W oil IMulti-viscoeity oi! = 10W30 -will leave

carbon deposits on critical components reducing

performance and compressor life.) Replace oil fill

plug.

Wiring instructions

iMPROPER GROUNDING CAN RESULT iN

ELECTRICAL SHOCK. WIRING OF THE PRES-

SURE SWITCH, ELECTRIC MOTOR AND

MANUAL ONIOFF SWITCH SHOULD BE

DONE BY A LICENSED ELECTRICIAN IN

ACCORDANCE WiTH NATIONAL AND LO-

CAL CODES AND ORDINANCES.

To prevent added current draw and motor overheat-

ing we recommend the use of 12 gauge (AWG) wire,

not exceeding a 70 foot length. The wire must be

rated at a minimum temperature of 75 °C.

When connecting wires, make sure that: (1) the

electrical box is large enough; (2) service is of

adequate amperage rating; (3} the supply line has the

same electrical characteristics (voltage, eycies and

phase} as the motor; {4) the line wire is the proper size

and (5) no other equipment is operated from the same

line. Various national and local codes and standards

have been set up covering electrica! apparatus and

wiring. These shoumd be consulted and observed. Our

recommended wire sizes may be smaller than the

minimum set up by local ordinances. If so, the larger

size wire shoutd be used to prevent excessive line

voltage drop. For wiring instructions, see the diagram

inside the pressure switch cover,

WALLMOUNTED

,/JUNCTIONBOX

OP,DISCONNECT

.. _CONDUITELEOW

E_ectricaJwiring m_st bs _ocsted away from

hot s_faces such as the compressor head,

compressor cylinder or compressor outlet

tube°

Break-in Procedures

Serious damage may resuJt if the following

break-in instructions are not closely followed,

This procedure is required only once; before the air

compressor is put into service.

1. Recheck compressor wiring, Make sure wires

are secure at all terminal connections. Free all

contacts of loose wire cuttings, etco

2. Check oil level in the crankcase before operation.

The oil level should be even with the top of the

fill hole and must not be allowed to be lower than

3/8" (six threads down) from the top at any time.

Add oil if level is low.

3. Open the outlet valve fully, to permit air to

escape and to prevent pressure build-up in the air

tank.

4. Turn ON the air compressor,

5. Run the air compressor for 30 minutes to seal the

rings and lubricate all internal surfaces,

8, Check all air line fittings and connections!piping

for air leaks by applying esoap solution. Correct

as necessary. Even minor leaks can cause this air

compressor to overwork, resulting in premature

break_down or inadequate performance.

7. Check for excessive vibration and noise. Adjust

air compressor belt guard as necessary to elimi-

nate chatter. Re-adjust or shim the air compres-

sor feet, if necessary for proper level.

8. Close the outlet valve and let the air compressor

pump up to cut-out pressure. Turn the air com-

pressor off and check oil level. Add oil if neces-

sary. Connect the air hose to the air outlet

adapter.

Your compressor is now ready for use.

IOPERATING PROCEDURES

1. Before attaching an air hose or accessory, make

sure the Globe Valve OFF/AUTO lever is in the

"OFF" position.

2. Attach hose and accessory.

IWARNING I

TOO MUCH AIR PRESSURE CAUSES A

HAZARDOUS RISK OF BURSTING. CHECK

THE MANUFACTURER'S MAXIMUM PRES-

SURE RATING FOR AIR TOOLS AND AC-

CESSORIES. THE REGULATOR OUTLET

PRESSURE MUST NEVER EXCEED THE

MAXIMUM PRESSURE RATING.

Compressed air from the outfit may contain

water condensation end oil mist. Do not spray

unfiltered air at an item that could be dam-

aged, Some air operated tools or devices may

require filtered air. Read the instructions for

the air tool or device.

3. Turn the compressor on and allow tank pressure

to build. The motor will stop when tank pressure

reaches cut-out pressure.

Your outfit is ready for use.

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU

MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AiR OR MOVING PARTS.

PERSONAL INJURIES CAN OCCUR. BEFORE PERFORMING MAINTENANCE OR REPAIR, TURN

OFF AND LOCK OUT ELECTRIC POWER AND BLEED OFF AIR TANK PRESSURE. NEVER

OPERATE THE COMPRESSOR WITH THE BELT GUARD REMOVED.

Air Compressor

Aclean 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 ventilation 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 dean et all times, Do not

operate the compressor with the air fiber

removed.

Adirty air filter wilt not aJtow the compressor to

operate at fuji capacity. Before you use the compres-

sor, check the air fiiter to be sure it is clean.

If it is dirty, remove the screws and filter retainer, Pull

out the filter, replace with new.

Oil - Checking and Changing

Overfilling with oiJ wUl cause premature com-

pressor failure. Do no_ overfill.

Check oi_ level in the crankcase deiJy. The oit level

should be even with the top of the fill hole and must

not be allowed to' be lower than 3/8" from the top (6

threads) at any time. Jtis recommended that the oil

be changed after every 100 hours of operation. To

drain the oii, remove the oiJdrain pJug and collect the

oil in asuitable container. Be sure to replace the plug

securely before adding new oil Use a speciaJ com-

pressor oil such as Sears 9-16426 or SAE-20-20W

SF motor oil (Crankcase oil capacity is 16 fluid

ounces.) Under extreme winter conditions use 10

weight oil.

Air Tank =Draining Water

[WARNING "_

WATER WILL CONDENSE IN THE AiR TANK.

IF NOT DRAINED, THE WATER WILL COB-

RODE AND WEAKEN THE AIR TANK CAUS-

ING A RISK OF AIR TANK RUPTURE.

Water should be drained from the air tank after each

use. Operate the unit to apply 15-20 PSIG and open

the drain cock. Continue operating unit until all

moisture is removed from the air tank. Close the drain

cock tightly.

NOTE

If drain cock valve is clogged, release air

pressure in air tank. The drain cock vaive can

then be removed, cleaned and reinstalled.

Check Valve - inspection and

Replacement

Remove the check valve for inspection or replace-

ment if air tank pressure wifl not buitd up. Use the

following procedure to inspect, clean or replace the

check valve,

1. Release air pressure from the air tank.

2. Loosen the top and bottom nuts and remove the

outlettube.

3. Unscrew the check valve (turncounterclock-

wise)using a7/8" diameter 1/2" socket wrench.

4. Check that the valve disc moves freely inside the

check valve and that the spring holds the disc in

the upper, cJosed position. The check valve may

be cleaned with a solvent.

5. ApptyseaJanttothecheckvatvethreads,Reinstai]

the check valve (turn ciockwise)o The vaJvestem

shouldetil_move freely -do not over tighten,

6o BepJace the outlettube and tightentop and

bottom nuts,

Safety Valve = inspection

iF THE SAFETY VALVE DOES NOT WORK

PROPERLY OVER-PRESSURIZATION MAY

OCCUR, CAUSING AIR TANK RUPTURE OR

EXPLOSION. OCCASIONALLY PULL THE

RING ON THE SAFETY VALVE TO MAKE

SURE THAT THE SAFETY VALVE OPER-

ATES FREELY. IF THE VALVE IS STUCK OR

DOES NOT OPEP_ATE SMOOTHLY, IT MUST

BE REPLACED WITH THE SAME TYPE OF

VALVE.

Motor

The motor has a 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 cooldown before restarting. De-energize

power supply. To restart, depress the reset button

located on the end of the motor and energize the

power supply.

NOTE

If the overload protector shuts the motor off

frequently, check for a possible voltage prob-

lem. Low voltage can also be suspected

when:

!. 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

SERIOUS INJURY OR DAMAGE MAY OC-

CUR IF PARTS OF THE BODY OR LOOSE

ITEMS GET CAUGHT iN MOVING PARTS.

NEVER OPERATE THE COMPRESSOR WITH

THE BELT GUARD REMOVED. THE BELT

GUARD SHOULD BE REMOVED ONLY WHEN

THE POWER TO THE COMPRESSOR iS DIS-

CONNECTED.

The motor is mounted on an adjustable motor base.

To reptace belt:

1. Turn off and lock out power source.

2. Remove screws from the back of the belt guard.

3. Loosen the four motor mounting screws,

4. Slide the motor toward the compressor pump.

5. Remove belt and replace.

NOTE

The belt should be centered over the grooves

on the flywheel and motor pulley.

6. Push the motor back into regular position and

tighten bolts securely. Proper tension is approxi-

mately 114" belt deflection measured midway

between the pulley and flywheel when a 3 pound

weight or equivalent finger pressure is applied at

this point. A loose belt will squeal at compressor

start-up.

7. Replace beltguard and screws.

TROUBLESHOOTING GUIDE

PROBLEM

Excessivetank pressure-safety

valve pops off.

Pulley and Flywheel - Alignment

The compressor flywheel and motor pulley must be

inline (in the same plane) within 1tl 6" to assure belt

retention within sheave grooves. The motor mount-

ing holes on the saddle are skewed to square the

motor with the compressor mounting hole as the belt

is tensioned. To check alignment, disconnect electri-

cal power and remove the belt guard. Place a straight-

edge 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 straightedge is

within 1/16" of the measured dimension at the pulley

grooves. Squareness is achieved when the pulley

grooves are an equal distance from the straightedge

on both sides of the motor shaft. I

WARNING I

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU

MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS.

PERSONAL INJURIES CAN OCCUR. BEFORE PERFORMING MAINTENANCE OR REPAIR, TURN

OFF AND LOCK OUT ELECTRIC POWER AND BLEED OFF AIR TANK PRESSURE. NEVER

OPERATE THE COMPRESSOR WITH THE BELT GUARD REMOVED.

CAUSE CORRECTION

Pressure switch does not shut off motor

when compressor reaches "cut-out" pres-

sure.

Air leaks at fittings or hose. Tubeorhosefittingsarenottightenough.

Air leaks at check valve. Defective or dirty check valve.

Air leaks at pressure switch Defective pressure switch release valve.

release valve.

Air leaks at air tank welds.

Air leak from safety valve.

Defective air tank.

Possible defect in safety valve.

Restricted check valve.

Loose pulley.

Low oil level.

Loose flywheel.

Loose compressor bolts.

Loose belt.

Carbon build-up.

Pressure switch must be replaced.

Tighten fittings where air can be heard escaping.

Check fittings under soapy water solution. DO

NOT OVER-TIGHTEN.

Removeandcleanorreplacecheckvalve.DO NOT

OVER-TIGHTEN.

Remove and replace the releasevalve.

Air tank must be replaced.

o,,,,.

WISE MODIFY AIR TANK. IT WILL BE

WEAKENED.

Operate safety valve manually be pullingon ring.

If valve still leaks, it shouldbe replaced.

Remove and clean or replace.

Tighten pulley set screw.

Maintain prescribedoil level.

Tighten screw.

Check bolts. Tighten as required,

Tighten belt as per instructions under Belt Re-

)lacement above.

Removethe headandvalve plate. Cleanthe valve

)late and the top of the piston. (Be sure carbon

doesnot fall into the cylinder.) Reassemble to 25-

30 ftJbs, usingnew gasket and torque screws,

CAUSE

Motor overload protection switch has tripped.

Tank pressure exceeds pressure switch "cut-

in" pressure.

Check valve stuck - fails to relieve head

}ressure; motor cannot start.

Loose electrical connections.

PROBLEM

Motor will not run.

Restricted air intake.

Compressor is not supply-

ing enough air to operate

accessories.

Possible defective capacitor.

Possible defective motor,

Fuse blown, circuit breaker tripped.

Pressure release valve on pressure switch

has not unloaded head pressure.

Dirty air filter.

Prolonged excessive use of air.

Compressor is not large enough for air re-

quirement.

Restricted air intake filter.

Loose belt.

Hole in hose.

Check valve restricted.

Air leaks,

CORRECTION

Let the motor cool off and reset switch by pressing

the red button located on the end of the motor.

Motor will start automatically when tank pressure

drops below "cut-in" pressure of pressure switch.

Remove and clean or replace. (Do not overtighten,}

Check wiring connection inside pressure switch

and terminal box area,

Return to Sears Service Center for inspection or

replacement if necessary.

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 "Fusetron" Type

T fuses are acceptable.

3. Check for low voltage conditions.

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 "OFF _ position, opening the pres-

sure release valve. If the valve still doesn't open,

it must be replaced.

Replace with new.

Decrease amount of air usage.

Check the accessory air requirement. If it is higher

than the pressure sup plied by your air compressor,

you need a larger compressor.

Replace air intake filter.

Adjust belt tension.

Check and replace if required.

Remove and clean or replace.

Excessive belt wear.

Squealing sound.

Loose belt.

Tight belt.

Loose pulley.

Loose belt.

There is no oiJ in the compressor.

Tighten fittings. (See Air Leaks Section of Trouble-

shooting Guide.)

Adiust tension,

Adjust tension.

Check for worn keyway or pulley bore. Also check

for bent motor shaft. Replace parts if necessary.

Adjust belt tension.

Add oil.

IAIR COMPRESSOR DIAGRAM ,I

11 12

10 13

_f.26

KEY

NO,

• 19

PARTNUMBER

SSF=953_ZN

CAC_22ol

SSF=S113=ZN

CACo2

CAC_362-1

SSP=9401

STD575026

SSP-7811

SS=8553

C_BTo224

SS=391

C-PU-2868

STD5801 {)4

CACo4205

MO=70Sl

CACo1331

SSF-928

SS-65{)6_CD

CAC-4336

SS-3222oCD

CAC-95

T1A-4159

C-GA-346

SSFo995oZN

SSF=8110=ZN

SS-1525-CD

SSV=5

SSF=815{)

CL-159

LA-1848=1

LA=I B11-1

SS-2707

TA-4259

SSW-7367

SSPo211 {)

CAC-437o2

CAC=357=1

SSFo3152

LA=1779

CAC=4{)29

DESCRIPTION

Sell' Tapping Screw (4 used)

Be_ Guard

Lock Nut

Bracket

Be_ Gua_ C_osure

Connector

Nut-SleeveAssembly {2 used)

Nut Sleeve Assembly

Connector

PolyoV Belt

Set Screw

Motor Putley

Key

Cord Assembly

Motor S HP

Pressure Release Tube

Cap Screw 5/t6'°=1B=1" (4 used)

Fla_washer {4 used)

Pressure Switch

Pipe Plug

Man,old

Safe_J Valve

Gauge

Screw (2 used)

Locknut (4 used)

IsolatorWasher {4 used)

Globe Valve

Locking Flange Nut (4 used)

Model No. Label

Warning Label

Sears Logo Label

D_in Valve

Air Receiver o6{) gel

Strain Relief

Nippie

Check Valve

OutletTube

Locking Cap Screw (4 used)

Warning -Hot Su_ace Label (2 used)

Compressor Pump Assembly {includes Key Nee 43 thru 78, inclusive)

ICOMPRESSOR PUMP DIAGRAM !

/44 45

. 48

66 (oil fill plug)

66 (oil drain p_ug)

ram--

KEY

NO.

e 49

=50

[] 51

[] 53

*55

+ 56

+ 57

+ 58

e 72

*78

PART NUMBER

SSF-6627

SSF-935

265_18

265-17

SSF-955

CAC-4213

CAC-291

265-25

SSF-9821

CAC-294

265-196

CAC-4212

CAC-54-1

CAC-56-1

CAC-58

CAC-57

CAC-55-1

265-19

CAC-207

265-410

SSF-927

CAC-51

265-41

SSP-1413

SSF-925

265-3

265-16

CAC-373

265-23

265-13

265-9

265-2

SSN-1014-ZN

STD541437

265-111

265-6

NOT SHOWN

SI-30-11 4-A

PARTS LiST

DESCRIPTION

Stud (2 used)

Screw #8-32 x 318" (2 used}

Filter Retainer

Filter

Screw 3/8"-16 x 1o112" (4 used)

Head Assembly (includes 2 ea. Key #50 & 4 ea. Key #51)

Head Gasket

intake Rapper Valve

(2 used on head)

Screw (8 used)

Restdctor Plate (2 used)

Rapper Valve with Comer Bevels

(2 used on valve plata)

Valve Plats Assembly (includes 4 eao Key #51 &2ea. Key #52 & 53)

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.

Screw 1/4"-20 x 1-1/8" 14 used)

Crankcase and Cytinder

Needle Bearing

Oil Fill/Drain Plug (2 used) (1/4" NPT)

Cap Screw 1/4"-20 x 718" {12 used)

Base

Base Gasket

Crankshaft

Needle Bearing

End Plate Gasket

End Plate

Rywheel

Washer

Screw

Oil Seal

Vent Filter

Owners Manual

Parts Ordering information

_F Key No= 56, 57, 58 enly available in Ring Kit KK_313.

®Key No. 19, pressure release valve and nut is available as pa_ of Kit KK-5020.

mKey No. 50, 51 and 53 onty available in Valve Kit KK-4275.

Key NOo 4.6, 49, 55, 69, 72, 77 and 78 are available in Gasket Kit KK-4312-2.

SF_ S

OWNERS

MANUAL

SERVICE

MODEL NO.

HOW TO ORDER

REPAIR PARTS

ONE STAGE

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, Canada,

Inc. stores. Be sure to provide all pertinent facts when you

call or visit.

The model number can be found on the label which is

located on the front of the air tank saddle.

WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE

FOLLOWING INFORMATION:

• 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 manufacturer's

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 electronically transmitted to a Sears Repair Parts

Distribution Center for handling.

Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.

SI-30-11-4-A 8/921 PrintedinU.S.A.

Craftsman 919175261 User Manual AIR COMPRESSOR Manuals And Guides L0803613

CRAFTSMAN Air compressor Manual L0803613 CRAFTSMAN Air compressor Owner's Manual, CRAFTSMAN Air compressor installation guides

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