Craftsman 921.16473 User Manual

Owner's Manual

AIR COMPRESSOR

Oilless

Single Stage

Direct Drive, Electric

33 Gallon Horizontal

Model No. 921.16473

CAUTION:

Before using this product,

read this manual and follow all its Safety Rules and

Operating Instructions.

• Safety Instructions

• Installation & Operation

• Maintenance & Storage

• Troubleshooting Guide

• Parts List

• Espa_ol, p. 15

• Fran_:ais, p. 24

Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.

www.craftsman.com

5/26/2010 Part No. 200-2802

1_:I:]|: [o]_ [a_o]_/ i :__/ l_'_

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

SERVICE INTERVAL ................................ 8

SPECIFICATION CHART ............................ 2

SAFETY GUIDELINES ............................. 3-4

GLOSSARY OF TERMS ............................. 4

OVERVIEW ....................................... 5

ASSEMBLY ....................................... 5

COMPRESSOR CONTROLS ......................... 6

MOTOR RESET AND WIRING ........................ 6

ELECTRICAL POWER REQUIREMENTS ............... 7

OPERATING INSTRUCTIONS ........................ 7

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

TROUBLESHOOTING CHART ........................ 9

PARTS DRAWINGS AND PARTS LISTS ............. 10-14

CRAFTSMAN ONE YEAR FULL WARRANTY FOR ONE YEAR from the date of purchase, this product is warranted against any defects in material

or workmanship. Defective product will receive free repair or free replacement if repair is unavailable.

For warranty coverage details to obtain repair or replacement, visit the web site: www.craftsman.com

This warranty does not cover the air filter or drive belt, which are expendable parts that can wear out from normal use within the warranty period.

This warranty is void if this product is ever used while providing commercial services or if rented to

another person.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.

[,,,___o] _I[_

APPROXIMATE

RUNNING TANK CAPACITY VOLTAGE/

MODEL NO. H.P. GALLONS AMPS/PHASE

CUT-IN

PRESSURE

921.16473 120 150

(WPB1683321) 1.6 33 (124,92 Liters ) 115/15/1 (8,27 bar) (10,34bar)

APPROXIMATE

CUT-OUT

PRESSURE

2 200-2802

ThefollowinginformationrelatestoprotectingYOURSAFETYandPREVENTINGEQUIPMENTPROBLEMS.Tohelpyourecognize thisinformation,weusethefollowingsymbols.Pleasereadthemanualandpayattentiontothesesections.

__ - A POTENTIAL HAZARD THAT WILL CAUSE SERIOUS INJURY OR LOSS OF LIFE. _k_- A POTENTIAL HAZARD THAT COULD CAUSE SERIOUS INJURY OR LOSS OF LIFE. __ - A POTENTIAL HAZARD THAT MAY CAUSE MODERATE INJURY OR DAMAGE TO

EQUIPMENT.

RISK OF FIRE OR EXPLOSION.

RISK OF BURSTING.

RISK OF ELECTRICAL SHOCK.

RISK OF INJURY.

RISK OF BURSTING.

RISK OF BURNS.

RISK TO BREATHING/INHALATION HAZARD..

RISK TO BREATHING.

RISK OF EYE INJURY.

RISK OF BURSTING.

Never spray flammable liquids in a confined area. It is normal for the motor and pressure switch to produce sparks while operating. If sparks come into contact with vapors from gasoline or other solvents, they may ignite, causing fire or explosion. Always operate the compressor in a well-ventilated area. Do not smoke while spraying. Do not spray where sparks or flame are

)resent. Keep compressor as far from spray area as possible. Store flammable materials in a

secure location away from compressor. Equip the area of operation with a fire extinguisher. Do not weld, drill or modify the air tank of this compressor. Welding or modifications on the air

compressor tank can severely impair tank strength and cause an extremely hazardous condition. Welding or modifying the tank in any manner wilt void the warranty. If tank develops a leak, replace it immediately with a new tank or replace the entire compressor.

Never use an electric air compressor outdoors when it is raining or on a wet surface, as it may cause an electric shock. Failure to provide adequate grounding to this product could result in serious injury or death from electrocution. Make certain that the electrical circuit to which the compressor is connected provides proper electrical grounding, correct voltage and adequate fuse

)rotection.

This unit starts automatically. ALWAYS shut off the compressor, remove the plug from the outlet, and bleed all pressure from the system before servicing the compressor, and when the compressor is not in use. Do not use the unit with the shrouds or belt guard removed. Serious injury could occur from contact with moving parts. Stay alert and watch what you are doing when operating the compressor. Do not use the compressor while tired or under the influence of drugs or alcohol.

Check the manufacturer's maximum pressure rating for air tools and accessories. Compressor outlet pressure must be regulated so as to never exceed the maximum pressure rating of the tool. Relieve all pressure through the hose before attaching or removing accessories. Never use compressor to inflate small low pressure objects such as children's toys, footballs, basketballs, etc.

High temperatures are generated by the pump and manifold. To prevent burns or other injuries, DO NOT touch the pump, manifold or transfer tube while the pump is running. Allow them to cool before handling or servicing. Keep children away from the compressor at all times. Do not reach around protective shrouds or attempt to maintenance until unit has been allowed to cool.

Always wear MSHA/NIOSH approved, properly fitting face mask or respirator and work in a well ventilated area when using tools that generate dust. Some dust created by power

sanding, grinding, drilling and other construction activities contains chemicals known (to the State of California) to cause cancer, birth defects or other reproductive harm. Some examples of these

chemicals are:

• lead from lead-based paints

• crystalline silica from bricks and cement and other masonry products

• arsenic and chromium from chemically treated lumber. Be certain to read all labels when you are spraying paints or toxic materials, and follow the safety

instructions provided on the table or safety sheets for the materials you are spraying. Use a MSHA/NIOSH approved respirator mask if there is a chance of inhaling anything you are spraying. Read all instructions and be sure that your respirator mask will protect you. Work in an area with good cross ventilation.

Always wear ANSI Z87.1 approved safety goggles when using an air compressor. Never point any nozzle or sprayer toward a person, animal or any part of the body. Equipment can cause serious injury if the spray penetrates the skin.

•Do not adjust the pressure relief valve for any reason. Doing so voids all warranties. The relief valve has been pre-set at the factory for the maximum pressure of this unit. Personal injury and/or property damage may result if the relief valve is tampered with.

•Do not use plastic or pvc pipe for compressed air. Use only galvanized steel pipe and fittings for compressed air distribution lines.

200-2802 3

RISK OF FIRE.

RISK TO BREATHING.

RISK OF INJURY

RISK TO HEARING. Always wear hearing protection when using an air compressor. Failure to do so may result in

NOTE: ELECTRICAL WIRING. Refer to the air compressor's serial label for the unit's voltage and amperage requirements. Ensure

Unattended operation of this compressor could result in personal injury or property damage. To reduce the risk of fire, do not allow the compressor to operate unattended. Always disconnect electrical power by turning the pressure switch to off and drain the tank daily or after each use.

Air obtained directly from the compressor should never be used to supply air for human consumption. The air stream may contain carbon monoxide, toxic vapors, or solid particles from tank. Breathing these contaminant's can cause serious injury or death. In order to use air produced by this compressor for breathing, suitable filters and in-line safety equipment must be properly installed. In-line filters and safety equipment must be properly installed. In-line filters and safety equipment used in conjunction with the compressor must be capable of treating air to all applicable local and federal codes prior to human consumption.

Always operate the compressor in a stable secure position to prevend accidental movement of the unit. Never operate the compressor on a table, workbench, roof or other elevated position. Use additional air hose to reach high locations.

hearing loss.

The power cord on this product contains lead, a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling.

that all wiring is done by a licensed electrician, in accordance with the National Electrical code.

A !NNI!

Drain the moisture from the tank on a daily basis. A clean, dry tank will help prevent corrosion. Pull the tank safety valve ring daily to ensure that the valve is functioning properly, and to clear the valve of any possible obstructions.

To provide proper ventilation for cooling, the compressor must be kept a minimum of 12 inches (31 cm) from the nearest walt, in a welt-ventilated area. Restricting any of the compressor ventilation openings will cause overheating and could cause fire, never place objects against or on top of compressor.

Fasten the compressor down securely iftransporting is necessary. Pressure must be released from the tank before transporting. Protect the air hose and electric cord from damage and puncture. Inspect them weekly for weak or worn spots, and replace if

necessary. To reduce the risk of electric shock, do not expose to rain. Store indoors.

Never operate the compressor if the power cord or plug are damaged. Have the unit serviced at a Sears or other qualified service center.

CFIMI: Cubic feet per minute; a unit of measure of air flow.

PSI: Pounds per square inch; a unit of measure of air pressure.

Cut-in pressure: While the motor is off, air tank pressure drops as you continue to use your accessory. When the tank pressure drops to factory set tow pressure point, the motor wilt restart automatically. The low pressure at which the motor automatically restarts is called "cut-in" pressure.

Cut-out pressure: When an air compressor is turned on and begins to run, air pressure in the air tank begins to build. It builds to the factory set high pressure point 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. Well-ventilated: Means of providing fresh air in exchange for

dangerous exhaust or vapors.

Dedicated circuit: An electrical circuit reserved for the exclusive

use of the air compressor.

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BASIC AIR COMPRESSOR COMPONENTS

Oittess air compressors are factory lubricated for life and do

not require any oil.

The basic components of the air compressor are the electric

motor, pump, pressure switch and tank (see Fig. 1).

The electric motor (see A) powers the pump. The electric motor is equipped with an overload protector to help prevent possible motor burnout. If the motor becomes overheated, the overload protector will shut it down. Should this occur, allow the motor to cool for 10-15 minutes, then press (never force) the

motor reset switch to restart the motor.

The pump (see A) compresses the air and discharges it into the tank.

The tank (see B) stores the compressed air.

The pressure switch (see C) shuts down the motor when the tank reaches a pro-set "cut-out" pressure. As compressed air is used and the tank drops to a pro-set "cut-in" pressure, the switch restarts the motor automaticallly, and the pump resumes compressing air.

ASSEMBLING THE COMPRESSOR

Unpack the air compressor. Inspect the unit for damage. If

the unit has been damaged in transit, contact the carrier

and complete a damage claim. Do this immediately

because there are time limitations to damage claims.

The carton should contain:

• air compressor

• operator/parts manual

• handle

2. Check the compressor's serial label to ensure that you

have received the model ordered, and that it has the

required pressure rating for its intended use.

For horizontal compressors only, install the handle by

loosening the set screws (D) and then placing the handle

ends (E) into the handle brackets (F) and secure with the set

screws (D) (see Fig. 2). Tighten screws using a size 3mm

hex wrench (not included).

3. Locate the compressor according to the following

guidelines:

a. Position the compressor near a grounded electrical

outlet (see GROUNDING INSTRUCTIONS). Avoid using an extension cord; use a longer air hose instead.

b. The pump side of the compressor must be at least

12 inches (31 cm) from any wall or obstruction, in a clean, well-ventilated area, to ensure sufficient air

flow and cooling.

c. In cold climates, store portable compressors in a

200-2802 5

heated building when not in use. This will reduce problems with lubrication, motor starting and freezing

of water condensation.

The compressor must be level to ensure drainage of the moisture in the tank.

4. Connect an air hose (not included) to the quick connect (G).

Fig. 2

Pressure Switch (see A)

This switch turns on the compressor. It is operated manually, but when in the AUTO position, it allows the compressor to start up or shut down automatically, without warning, upon air demand.

ALWAYS set this switch to OFF when the compressor is not

being used, and before unplugging the compressor. Tank Safety Valve (see B)

Used to allow tank pressure to escape into the atmosphere. If the pressure switch does not shut off the compressor at it's "cut-out" pressure setting, the safety valve wilt protect against high pressure by releasing tank pressure at it's factory set pressure (slightly higher than the pressure switch "cut-out" setting). To operate manually, pull the ring on the valve to relieve air pressure in the tank.

Pressure Release Valve (see C)

The pressure release valve (located on the bottom of the pressure switch), is designed to release compressed air from the compressor head and outlet tube when the compressor reaches "cut-out" or is shut off. The pressure valve allows the motor to restart freely. When the motor stops running, air will be heard escaping from this valve for a few seconds. No air should be heard leaking when the motor is running or after brief release after reaching "cut-out" pressure.

Tank Pressure Gauge (see D)

This gauge measures the pressure level of the air stored in the tank. It is not adjustable by the operator, and does not indicate line pressure.

Air Pressure Regulator (see E)

This air pressure regulator enables you to adjust line

pressure to the tool you are using.

__ Never exceed the maximum working

pressure of the tool.

To adjust pressure setting, pull out the knob and turn clockwise to increase pressure, and counterclockwise to decrease pressure. To lock a pressure setting, push the knob in.

Regulated Pressure Gauge (see F)

This gauge measures the regulated line pressure. Quick Connect(s) (see G)

A quick release for attaching and removing the air hose.

Fig. 3

MOTOR RESET SWITCH

__Ensure that all guards and shrouds are in

place before pressing the reset switch to restart the motor.

If the motor shuts down because of overload, wait 10-15 minutes so the motor can cool down, then press (NEVER force)

the reset switch (see H) to restart the motor.

ELECTRICAL WIRING

Refer to the air compressor's serial label for the unit's voltage and amperage requirements.

Use a dedicated circuit

For best performance and reliable starting, the air compressor must be plugged into a dedicated circuit, as close as possible to the fuse box or circuit breaker. The

compressor will use the full capacity of a typical 15 amp household circuit. If any other electrical devices are drawing from the compressor's circuit, the compressor may fail to start. Low voltage or an overloaded circuit can result in sluggish starting that causes the motor overload protection system or circuit breaker to trip, especially in cold conditions.

NOTE: To handle the initial electrical load of starting the air compressor, a circuit breaker is recommended. If the air compressor is connected to a circuit protected by a fuse, use dual

element time delay fuses (Buss Fusetron type "T" only).

EXTENSION CORDS

NOTE: Avoid use of extension cords.

For optimum performance, plug the compressor power cord

directly into a grounded walt socket. Do not use an extension cord

unless absolutely necessary. Instead, use a longer air hose to reach the area where the air is needed.

If use of an extension cord cannot be avoided, the cord

should be no longer than 50 feet and be a minimum wire size of

12 gauge (AWG). Do not use a 16 or 14 gauge extension cord.

Use only a 3-wire extension cord that has a 3-blade

grounding plug, and a 3-slot receptacle that wilt accept the plug on the product. Make sure your extension cord is in good

condition. An undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. The smaller the gauge

number, the heavier the cord. GROUNDING INSTRUCTIONS

This product should be grounded. In the event of an electrical

short circuit, grounding reduces the risk of electric shock by

providing an escape wire for the electric current.

6 200-2802

Thisproductisequippedwithacordhavingagroundingwire

withanappropriategroundingplug.Theplugmustbeplugged

intoanoutletthatisproperlyinstalledandgroundedin accordancewithalllocalcodesandordinance.

are not completely understood, or if in doubt as to whether the product is properly grounded. Do not modify the plug provided; if

it will not fit the outlet, have the proper outlet installed by a licensed electrician.

__ Improper installation of the

grounding plug can result in a risk of electric shock. If repair or replacement of the cord or plug is

necessary, do not connect the grounding wire to either fiat blade terminal of the plug. The wire" insulation having an outer surface that is green with or without yellow stripes is the grounding wire.

This product is for use on a 115 volt circuit. A cord with a

grounding plug, as shown here, shall be used.

Make sure that the product is connected to an outlet having the same configuration as the plug (see Fig. 5). No adapter should be used with this product.

Check with a licensed electrician if the grounding instructions

DAILY START-UP

1. Turn the pressure switch to the OFF position (see C).

2. Close the tank petcock (see F). Turn in the clockwise

direction.

3. Plug in the power cord.

_IL_ High temperatures are generated

by the electric motor and the pump. To prevent burns or other injuries, DO NOT touch the compressor while it is running. Allow it to cool before handling or servicing. Keep children away from the compressor at all times.

Fig. 5

Grounded

Outlet

Grounding ,Pin

Fig. 6

OFF (C)

(D) AUTO

4. Turn the pressure switch to the AUTO position (see D).

5. Adjust the regulator to the working pressure of the tool.

NOTE: To adjust pressure setting, pull out the knob and turn clockwise to increase pressure, and counterclockwise to decrease pressure. To lock a pressure setting, push the knob in.

__When adjusting from a higher to a

lower pressure, turn the knob counterclockwise past the desired setting, then turn clockwise to reach the desired pressure. Do not exceed operating pressure of the tool or accessory being used.

SHUTDOWN

1. Turn the pressure switch to the OFF position (see C).

2. Unplug the power cord.

3. Reduce pressure in the tank through the outlet hose. You

can also pull the tank safety valve ring (see G) and keep it

open to relieve pressure in the tank.

4. Open the petcock (see E) to allow moisture to drain from

the tank.

_[__Escaping air and moisture can

propel debris that may cause eye injury. Wear safety goggles when opening petcock.

200-2802 7

MAINTENANCE

__ To avoid personal injury, always shut off

and unplug the compressor and relieve all air pressure from the system before performing any service on the air

compressor.

Regular maintenance will ensure trouble-free operation. Your electric powered air compressor represents high-quality engineering and construction; however, even high-quality machinery requires periodic maintenance. The items listed below should be inspected on a regular basis

DRAINING THE TANK

Drain the moisture from the tank (for instructions, see "Shutdown" in the operating instructions section).

__Condensation will accumulate in

the tank. To prevent corrosion of the tank from the inside, this moisture must be drained at the end of every workday. Wear protective eyewear.

NOTE: In cold climates, drain the tank after each use to reduce

problems with freezing of water condensation.

TO REPLACE OR CLEAN CHECK VALVE

_M_RISK OF INJURY. This unit starts

automatically. ALWAYS shut off the compressor, remove the plug from the outlet, and bleed all pressure from the system before servicing the compressor, and when the compressor is not in use. Do not use the unit with the shrouds or belt guard removed. Serious injury could occur from contact

with moving parts.

Turn air compressor off, remove the power cord from the

outlet or lock out the power supply and relieve all the air

pressure from the tank (refer to "Shutdown" in Operating

Instructions). Make sure the compressor has cooled down

before servicing.

2. Using the appropriately

sized wrench, loosen

the compression nuts

(A) on the check valve

(B). Gently move the

transfer tube (C) and

bleeder tube (D) out of

the way.

3. Making note of the

orientation for

reassembly, unscrew

the check valve from the

tank (counterclockwise)

using the appropriately

sized wrench.

4. Using a pencil or

screwdriver, carefully

push the valve disc up

and down. If the valve

disc does not move freely

up and down, the check

valve needs to be cleaned

or replaced.

C A

Check valve

Screwdriver

pencil

5. Clean the check valve with warm soapy water and make sure to dry thoroughly before reinstalling. If the disc valve still does not move freely up and down, it will need to be replaced.

6. Apply thread sealant to the check valve threads and reinstall

into the tank by turning clockwise. Make sure it is the

same orientation as when it was removed.

7. Replace the bleeder tube and tighten compression nuts.

8. Replace the transfer tube and tighten compression nuts.

CLEANING THE AIR FILTER

A dirty air filter wilt

reduce the compressor's performance and life. To

avoid any internal contamination of the pump,

the filter should be cleaned frequently, and replaced on a

regular basis. Felt filters should be cleaned in warm, Airfilter soapy water, rinsed, and allowed to air dry before reinstallation. Paper filters should be replaced when dirty. Do not allow the filter to become filled with dirt or paint. If the filter becomes filled with paint, it should be replaced. Direct exposure to dirty conditions or painting areas will void your warranty.

CHECKING THE RELIEF VALVE

Pull the tank safety valve daily to ensure that it is operating

properly and to clear the valve of any possible obstructions.

TESTING FOR LEAKS

Check that all connections are tight. A small leak in any of

the hoses, transfer tubes, or pipe connections wilt substantially reduce the performance of your air compressor. Ifyou suspect a leak, spray a small amount of soapy water around the area of the suspected leak with a spray bottle. If bubbles appear, repair or replace the faulty component. Do not over tighten any

connections.

STORAGE

Before storing the compressor for a prolonged period, use an

air blow gun to clean all dust and debris from the compressor.

Disconnect the power cord and coil it up. Pull the tank safety valve to release all pressure from the tank. Drain all moisture from the tank. Clean the filter element and filter housing; replace the element if necessary. Drain the oil from the pump crankcase and replace it with new oil. Cover the entire unit to protect it from

moisture and dust.

SERVICE INTERVAL

Perform the following maintenance at the Daily or after intervals indicated below, each use

When used in

Inspect air filter (clean or replace as necessary) dusty

conditions Operate the tank safety valve • Drain tank

200-2802

Note: Troubleshooting problems may have similar causes and solutions.

PROBLEM Low pressure or not

enough air or

Compressor does not stop

Air leaks from regulator, or regulator does not regulate pressure

Regulated pressure gauge reading drops when air accessory is

being used

Pressure relief valve opens

Motor will not run

Air leaking through bleeder valve after

compressor shuts off

POSSIBLE CAUSE

Tank petcock is open

Fittings Leak Restricted air intake

Prolonged excessive use of air

Compressor not large enough

Hole in air hose

Tank leaks

Blown seals

Valve leaks

Leaking or worn piston Dirty or damaged regulator

internal parts.

This is normal

Compressor not large enough

Tank pressure exceeded normal operating pressure

Pressure switch stuck

Tank pressure exceeds preset

3ressure switch limit

Motor overload protection has

tripped

Fuse blown or circuit breaker

tripped

Dirty or defective check valve.

Wrong wire gauge incord or excessive extension cord length

Loose electrical connections Paint spray on internal motor

3arts Possible defective motor Dirty or defective check valve.

SOLUTION

Close petcock. Check fittings with soapy water. Tighten or reseal leaking fittings. DO

NOT OVERTIGHTEN. Clean or replace intake filter element.

Decrease amount of air used.

Check air requirement of accessory. If it is higher than CFM and

3ressure supplied by compressor, you need a larger compressor. Most

accessories are rated at a 25% duty cycle. Check and replace if necessary.

,tL _ Immediately replace tank. DO NOT attempt to repair.

Contact a Sears or other qualified service center. Contact a Sears or other qualified service center.

Contact a Sears or other qualified service center.

If pressure drops too low, adjust regulator while accessory is used. Check air requirement of accessory. If it is higher than CFM and

3ressure supplied by compressor, you need a larger compressor. Most

accessories are rated at a 25% duty cycle.

Contact a Sears or other qualified service center. Contact a Sears or other qualified service center.

Motor will start automatically when tank pressure drops below kick-in

3ressure of pressure tank.

Let motor cool off and overload switch will automatically reset. This may take several minutes.

• Replace blown fuse or reset circuit breaker. Do not use fuse or circuit breaker with higher rating than specified for your branch circuit.

• Check for proper fuse; "Fusetron" type T is acceptable.

• Check for low voltage and proper extension cord size.

• Disconnect other applications from circuit. Operate compressor on a dedicated circuit.

Replace or clean the check valve (see "To replace or clean check valve" in the maintenance section).

Check for proper gauge and extension cord length. Contact a Sears or other qualified service center.

Contact a Sears or other qualified service center. Do not operate compressor in the paint spray area

Contact a Sears or other qualified service center. Replace or clean the check valve (see "To replace or clean check

valve" in the maintenance section).

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