Speedaire 4up73 Instructions for use

Form 5S4280

Description

Speedaire twin cylinder, low maintenance, oil-less portable air compressor is designed

for home, farm and medium duty industrial uses with a 50/50 duty cycle. The 3.5 HP

pump and motor assembly on a 20 gallon capacity air tank is equipped with check valve,

unloader valve, pressure switch, safety valve, air regulator, and tank pressure gauge.

Motor includes automatic thermal overload protection. UL listed.

Printed in U.S.A.

03465

0998/239/VCPVP

Specifications

Motor HP ............................................... 3.5

Cylinders ............................................. Two

Air Delivery - SCFM @ 90 psi................. 5.9

@ 40 psi ....................8.0

Maximum Air Pressure (psi) .................. 135

Compressor RPM ............................... 1725

Tank Size (Gallons) ................................. 20

Voltage @ 60 Hz, 1-Phase ............. 120/240

Amperage (Amps) ............................. 15/7.5

Overall Dimensions

Model 4UP73.....

L W H Weight

35.75” 19.06” 32.75"

123 lbs.

Figure 1

Unpacking

After unpacking the unit, inspect carefully

for any damage that may have occurred

during transit. Check for loose, damaged

or missing parts.

Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the

product described. Protect yourself and others by observing all safety information. Failure to comply with instructions

could result in personal injury and/or property damage! Retain instructions for future reference.

Operating Instructions & Parts Manual 4UP73

Speedaire Permanently

Lubricated Twin Cylinder

Air Compressors

Danger

indicates an

imminently hazardous situation

which, if not avoided, WILL result

in death or serious injury.

Important

safety

information - A hazard that

might cause serious injury or

loss of life.

Caution

indicates a

potentially hazardous situation

which, if not avoided, MAY

result in minor or moderate

injury.

NOTE: Note indicates important

information, that if not followed,

may cause damage to equipment.

Safety Guidelines

This manual contains information

that is very important to know

and understand. This information

is provided for SAFETY and to

PREVENT EQUIPMENT PROB-

LEMS. To help recognize this in-

formation, observe the following

symbols.

#721Y

D21100-0

RISK OF BURSTING

RISK OF

EXPLOSION OR FIRE

AIR TANK

THE FOLLOWING CONDITIONS COULD LEAD

TO A WEAKENING OF THE TANK, AND RESULT

IN A VIOLENT TANK EXPLOSION:

1. FAILURE TO PROPERLY DRAIN

CONDENSED WATER FROM THE TANK,

CAUSING RUST AND THINNING OF THE

STEEL TANK.

2. MODIFICATIONS OR ATTEMPTED

REPAIRS TO THE TANK.

3. UNAUTHORIZED MODIFICATIONS TO THE

PRESSURE SWITCH, SAFETY VALVE, OR

ANY OTHER COMPONENTS WHICH

CONTROL TANK PRESSURE.

ATTACHMENTS & ACCESSORIES

EXCEEDING THE PRESSURE RATING OF AIR

TOOLS,SPRAY GUNS, AIR OPERATED ACCES-

SORIES, TIRES AND OTHER INFLATABLES CAN

CAUSE THEM TO EXPLODE OR FLY APART,

AND COULD RESULT IN SERIOUS INJURY.

1. IT IS NORMAL FOR ELECTRICAL

CONTACTS WITHIN THE MOTOR AND

PRESSURE SWITCH TO SPARK.

2. IF ELECTRICAL SPARKS FROM

COMPRESSOR COME INTO CONTACT WITH

FLAMMABLE VAPORS, THEY MAY IGNITE,

CAUSING FIRE OR EXPLOSION.

3. RESTRICTING ANY OF THE COMPRESSOR

VENTILATION OPENINGS WILL CAUSE

SERIOUS OVERHEATING AND COULD

CAUSE FIRE.

1. DRAIN TANK DAILY OR AFTER EACH

USE. IF TANK DEVELOPS A LEAK,

REPLACE IT IMMEDIATELY WITH A NEW

TANK OR NEW COMPRESSOR OUTFIT.

2. NEVER DRILL INTO, WELD, OR MAKE

ANY MODIFICATIONS TO THE TANK OR

ITS ATTACHMENTS.

3. THE TANK IS DESIGNED TO WITHSTAND

SPECIFIC OPERATING PRESSURES.

NEVER MAKE ADJUSTMENTS OR

PARTS SUBSTITUTIONS TO ALTER THE

FACTORY SET OPERATING PRESSURES.

FOLLOW THE EQUIPMENT MANUFACTUR-

ERS RECOMMENDATION AND NEVER

EXCEED THE MAXIMUM ALLOWABLE

PRESSURE RATING OF ATTACHMENTS.

NEVER USE COMPRESSOR TO INFLATE

SMALL LOW-PRESSURE OBJECTS SUCH

AS CHILDREN’S TOYS, FOOTBALLS,

BASKETBALLS, ETC.

1. ALWAYS OPERATE THE COMPRESSOR

IN A WELL VENTILATED AREA FREE OF

COMBUSTIBLE MATERIALS, GASOLINE

OR SOLVENT VAPORS.

2. IF SPRAYING FLAMMABLE MATERIALS,

LOCATE COMPRESSOR AT LEAST 20

FEET AWAY FROM SPRAY AREA. AN

ADDITIONAL LENGTH OF HOSE MAY BE

REQUIRED.

STORE FLAMMABLE MATERIALS IN A

SECURE LOCATION AWAY FROM

COMPRESSOR.

3. NEVER PLACE OBJECTS AGAINST OR

ON TOP OF COMPRESSOR. OPERATE

COMPRESSOR IN AN OPEN AREA AT

LEAST 12 INCHES AWAY FROM ANY

WALL OR OBSTRUCTION THAT WOULD

RESTRICT THE FLOW OF FRESH AIR TO

THE VENTILATION OPENINGS.

HAZARD WHAT CAN HAPPEN HOW TO PREVENT IT

IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN SERIOUS INJURY

AND PROPERTY DAMAGE. READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUC-

TIONS BEFORE USING THIS EQUIPMENT.

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

Speedaire Operating Instructions and Parts Manual 4UP73

Speedaire Operating Instructions and Parts Manual

Model 4UP73

HAZARD

RISK OF

ELECTRICAL SHOCK

RISK FROM FLYING OBJECTS

RISK TO BREATHING

RISK FROM MOVING PARTS

RISK OF FALLING

WHAT CAN HAPPEN

1. YOUR AIR COMPRESSOR IS POWERED

BY ELECTRICITY. LIKE ANY OTHER

ELECTRICALLY POWERED DEVICE, IF IT IS

NOT USED PROPERLY IT MAY CAUSE

ELECTRIC SHOCK.

2. REPAIRS ATTEMPTED BY UNQUALIFIED

PERSONNEL CAN RESULT IN SERIOUS

INJURY OR DEATH BY

ELECTROCUTION.

3. ELECTRICAL GROUNDING: FAILURE TO

PROVIDE ADEQUATE GROUNDING TO

THIS PRODUCT COULD RESULT IN

SERIOUS INJURY OR DEATH FROM

ELECTROCUTION. SEE GROUNDING

INSTRUCTIONS.

THE COMPRESSED AIR STREAM CAN

CAUSE SOFT TISSUE DAMAGE TO

EXPOSED SKIN AND CAN PROPEL DIRT,

CHIPS, LOOSE PARTICLES, AND SMALL

OBJECTS AT HIGH SPEED, RESULTING IN

PROPERTY DAMAGE OR PERSONAL

INJURY.

1. THE COMPRESSED AIR FROM YOUR

COMPRESSOR IS NOT SAFE FOR

BREATHING! THE AIR STREAM MAY

CONTAIN CARBON MONOXIDE, TOXIC

VAPORS, OR SOLID PARTICLES.

2. SPRAYED MATERIALS SUCH AS PAINT,

PAINT SOLVENTS, PAINT REMOVER,

INSECTICIDES, WEED KILLERS, ETC.

CONTAIN HARMFUL VAPORS AND

POISONS.

1. MOVING PARTS CAN CAUSE SERIOUS

INJURY OR DAMAGE IF THEY COME

INTO CONTACT WITH YOU OR YOUR

CLOTHING.

2. ATTEMPTING TO OPERATE OR REPAIR

COMPRESSOR WITH PROTECTIVE

SHROUDS REMOVED CAN EXPOSE

YOU TO MOVING PARTS AND

ELECTRICAL SHOCK.

3. THE COMPRESSOR CYCLES AUTO-

MATICALLY WHEN THE PRESSURE

SWITCH IS IN THE ON/AUTO POSITION.

A PORTABLE COMPRESSOR CAN FALL

FROM A TABLE, WORKBENCH OR ROOF

CAUSING DAMAGE TO THE COMPRES-

SOR WHICH COULD EXPOSE YOU TO

HAZARDOUS MOVING OR ELECTRICAL

PARTS.

HOW TO PREVENT IT

1. NEVER OPERATE THE COMPRESSOR

OUTDOORS WHEN IT IS RAINING OR IN

WET CONDITIONS

NEVER OPERATE COMPRESSOR WITH

COVER COMPONENTS REMOVED OR

DAMAGED.

2. ANY ELECTRICAL WIRING OR REPAIRS

REQUIRED ON THIS PRODUCT SHOULD

BE PERFORMED BY AUTHORIZED

SERVICE CENTER PERSONNEL IN

ACCORDANCE WITH THE UNITED

STATES NATIONAL AND LOCAL

ELECTRICAL CODES.

3. MAKE CERTAIN THAT THE ELECTRICAL

CIRCUIT TO WHICH THE COMPRESSOR

IS CONNECTED PROVIDES PROPER

ELECTRICAL GROUNDING, CORRECT

VOLTAGE AND ADEQUATE FUSE

PROTECTION.

ALWAYS WEAR ANSI Z87.1 APPROVED

SAFETY GLASSES WITH SIDE SHIELDS

WHEN USING THE COMPRESSOR.

NEVER POINT ANY NOZZLE OR SPRAYER

TOWARD ANY PART OF THE BODY OR AT

OTHER PEOPLE OR ANIMALS.

1. NEVER INHALE AIR FROM THE

COMPRESSOR EITHER DIRECTLY OR

FROM A BREATHING DEVICE

CONNECTED TO THE COMPRESSOR.

2. WORK IN AN AREA WITH GOOD CROSS-

VENTILATION. READ AND FOLLOW THE

SAFETY INSTRUCTIONS PROVIDED ON

THE LABEL OR SAFETY DATA SHEETS

FOR THE MATERIAL YOU ARE

SPRAYING. USE A NIOSH/MSHA

APPROVED RESPIRATOR DESIGNED

FOR USE WITH YOUR SPECIFIC

APPLICATION.

1. DO NOT REMOVE THE PROTECTIVE

COVERS FROM THIS PRODUCT. NEVER

OPERATE THE COMPRESSOR WITH

GUARDS OR COVERS WHICH ARE

DAMAGED OR REMOVED.

2. ANY REPAIRS REQUIRED ON THIS

PRODUCT SHOULD BE PERFORMED BY

AUTHORIZED SERVICE CENTER

PERSONNEL.

3. ALWAYS TURN OFF THE COMPRESSOR,

BLEED PRESSURE FROM THE AIR

HOSE AND TANK, AND UNPLUG FROM

ELECTRICAL OUTLET BEFORE PER-

FORMING MAINTENANCE OR ATTACH

ING TOOLS AND ACCESSORIES.

ALWAYS OPERATE COMPRESSOR IN A

STABLE SECURE POSITION TO PREVENT

ACCIDENTAL MOVEMENT OF THE UNIT.

NEVER OPERATE COMPRESSOR ON A

ROOF OR OTHER ELEVATED POSITION.

USE ADDITIONAL AIR HOSE TO REACH

HIGH LOCATIONS.

Speedaire Operating Instructions and Parts Manual 4UP73

If any of the above conditions cannot be

met, or if operation 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 cord set.

VOLTAGE AND CIRCUIT PROTECTION

Refer to the specification chart for voltage

and circuit protection requirements of

your compressor. Use only a fuse or circuit

breaker that is the same rating as the

branch circuit the air compressor is

operated on. If the compressor is con-

nected to a circuit protected by fuses, use

only dual element time delay fuses.

GROUNDING INSTRUCTIONS

Improper

grounding can

result in electrical shock. In the event

of a short circuit, grounding reduces

risk of shock by providing an escape

wire for the electric current. Air

compressor must be properly

grounded.

1. Air compressor is equipped with a

cord having a ground wire with an

appropriate grounding plug. Plug

must be used with an outlet that has

been installed and grounded in

accordance with all local codes and

ordinances. Outlet and plug must

have the same configuration. DO

NOT USE AN ADAPTER.

2. Do not modify the provided plug. If it

does not fit the available outlet, the

correct outlet should be installed by a

qualified electrician.

3. Inspect plug and cord before each

use. Do not use if there are signs of

damage.

Installation

TOOLS NEEDED FOR ASSEMBLY

• 9/16" socket or open end wrench for

attaching the wheels or removing

shipping boards

• 3/8" open end wrench or socket to

tighten handle screws

INSTALLING WHEELS AND

ISOLATORS

The wheels and

handle do not

provide adequate clearance,

stability or support for pulling the

unit up and down stairs or steps.

HAZARD WHAT CAN HAPPEN

TOUCHING EXPOSED METAL SUCH AS

THE COMPRESSOR HEAD OR OUTLET

TUBE CAN RESULT IN SERIOUS BURNS.

HOW TO PREVENT IT

NEVER TOUCH ANY EXPOSED METAL

PARTS ON COMPRESSOR DURING OR

IMMEDIATELY AFTER OPERATION.

COMPRESSOR WILL REMAIN HOT FOR

SEVERAL MINUTES AFTER OPERATION.

EXTENSION CORD

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, be sure it is:

1. A 3-wire extension cord that has a

3-blade grounding plug, and a 3-slot

receptacle that will accept the plug

on the product.

2. In good condition.

3. No longer than 50 feet.

4. 12 gauge (AWG) or larger. Wire size

increases as gauge number

decreases. 10 AWG and 8 AWG may

also be used. (DO NOT USE A 14

OR 16 AWG.)

Certain air compres-

sor models can be

converted to 240 volts from 120 volt

operation. When converting a specific

model to 240 volt operation, the

attached three-prong 120 volt plug

must be replaced with the three-

prong 240 volt plug (purchase locally)

or order line cord Part No. K-0084.

Some models have a dual voltage

motor, 120 and 240 volt. They are wired

for 120 volt but can be converted to 240

volt operation. Instructions for converting

these motors for operation at 240 volt can

be found printed on the label attached to

the side of the motor.

Compressor 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

specifications in owners manual.

4. Circuit is equipped with 15 amp

circuit breaker or 15 amp time

delay fuse. Use a Fusetron Type

"T" time delay fuse.

It may be neces-

sary to brace or

support one end of the outfit when

attaching the wheels and the isola-

tors because the air compressor will

have a tendency to tip.

1. Install one shoulder bolt and one nut

for each wheel using upper bolt

hole. Tighten securely. The outfit

will sit level if the wheels are

properly installed.

2. Install isolators to the front bracket.

LOCATION OR AIR COMPRESSOR

Locate air compressor in a clean, dry,

well ventilated area. 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 the

wall or other obstructions that will

interfere with air flow. Air compressor

head and shroud are designed to allow

proper cooling. If humidity is high, air

filter can be installed to remove

excessive moisture. Follow air filter

instructions for proper installation.

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

RISK OF BURNS

Regulator

Pressure

Relief Valve

(Not Shown)

Pressure

Switch

On/Off

Lever

Compressor

Pump

Pressure

Gauge

Tank

Pressure

Gauge

Safety

Valve

Check Valve Drain Valve

Speedaire Operating Instructions and Parts Manual

Model 4UP73

Installation (Continued)

Risk of electrical

shock. If repairing

or replacing cord or plug, the

grounding wire must be kept

separate from the current-carrying

wires. Never connect the grounding

wire to a flat blade plug terminal.

(The grounding wire has insulation

with an outer surface that is green

with or without yellow stripes.)

White

Wire

Ground

15 AMP Plug

Grounded

Outlet

Grounding

Operation

AIR COMPRESSOR PUMP

To compress air, the pistons move up and

down in the cylinder. Air is drawn in

through the air intake valves on the

downstroke of the pistons. Exhaust valve

remains closed. On the upstroke of the

pistons, air is forced out through the

exhaust valve, through the outlet tubes,

through the check valve, and into the air

tank. Working air is not available until the

compressor has raised the 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 compressor head and the outlet tube

when the air compressor reaches "cut-out"

pressure or is shut off.

Figure 2

BREAK-IN PROCEDURES

This procedure is only required the first

time the air compressor is put into service

and when the check valve has to be

replaced.

1. Set the pressure switch OFF/AUTO

lever to the OFF position.

2. Plug power cord into the correct

branch circuit receptacle.

3. Turn regulator clockwise, opening it

fully, to prevent air pressure build-up

in the tank.

4. Move the OFF/AUTO lever to

AUTO. Compressor will start.

5. Run the compressor for 15 minutes.

Make sure the regulator is open and

there is no tank pressure buildup.

6. After 15 minutes, close the regulator

by turning it counter-clockwise. Air

tank will fill to cut-out pressure and

then the motor will stop.

Motor will not be able to start if the air

is not released. The pressure release

valve allows the motor to restart freely.

After the motor stops running air will

escape from the pressure release valve.

No air should be heard leaking when

the motor is running.

PRESSURE SWITCH

The pressure switch automatically starts

the motor when the air tank pressure

drops below the factory set "cut-in"

pressure. When the air tank pressure

reaches the factory set "cut-out"

pressure the pressure switch

automatically stops the motor.

SAFETY VALVE

If the pressure switch does not shut off

the air compressor at its cut-out

pressure setting, the safety valve will

protect against high pressure by

"popping off" at its preset pressure.

REGULATOR

Air pressure coming from the air tank is

controlled by the regulator knob. Turn

the knob clockwise to increase pressure

and counter-clockwise to decrease

pressure. To avoid minor readjustments

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 a pressure lower

than is desired, then raise the pressure

to the desired setting. The outlet

regulated air pressure may need to be

adjusted while operating, depending on

the air requirements of the accessory.

OUTLET PRESSURE GAUGE

The outlet pressure gauge indicates the

air pressure available at the outlet side

of the regulator. Pressure is controlled

by the regulator and is always equal to

or less than the tank pressure. See

"Operating Procedures."

TANK PRESSURE GAUGE

The reserve air pressure in the tank is

indicated by the tank pressure gauge.

Figure 3

Speedaire Operating Instructions and Parts Manual 4UP73

1. Compress the rear slotted end of each

of the two pins holding filter in place.

2. Pull pin forward releasing the filter

itself.

3. Clean (Wash in mild detergent.)

4. Reinstall a clean filter, place in

position, and push retaining pins into

holes securing filter.

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

Operation (Continued)

MOTOR

Motor has an automatic reset thermal

overload protector. If motor overheats for

any reason, overload protector will shut off

motor. Motor must be allowed to cool

down before restarting. Compressor will

automatically re-start after motor cools.

Low voltage may cause:

1. Overload protector to frequently shut

off the motor.

2. Motor not to get up to full power or

speed.

3. Fuses blow out when starting the

motor.

4. Lights dim and remain dim when

motor is started and running.

SAFETY VALVE - INSPECTION

If safety valve does

not work properly,

over-pressurization may occur, causing

air tank rupture or an explosion.

Occasionally pull ring on safety valve

to make certain safety valve operates

freely. If the valve is stuck or does not

operate smoothly, replace with the

same type or valve.

Filter

Figure 4

LUBRICATION

Compressor does not require any

lubrication. All metal bearings are

permanently lubricated and the

compression cylinder/piston/ring area is

specifically designed to require no

lubrication.

NOTE: If drain valve is plugged, release all

air pressure. Remove valve, clean, then

reinstall valve.

6. After water has been drained, close

drain valve. Air compressor can now

be stored.

Hot surfaces. Risk of

burn. Compressor

heads are exposed when filter cover is

removed. Allow compressor to cool

prior to servicing.

Maintenance

Unit cycles auto-

matically when

power is on. When performing

maintenance, you may be exposed to

voltage sources, compressed air or

moving parts. Before performing any

maintenance or repair, unplug the

power cord and bleed off all air

pressure.

AIR FILTER INSPECTION

NOTE: Keep the air filter clean at all times.

Do not operate the compressor with the

air filter removed. A dirty filter will not

allow the compressor to operate at full

capacity. Before using the compressor,

check the air filter to be sure it is clean. To

remove and clean or replace the foam air

filter:

Water will condense

in air tank. If not

drained, water will corrode and

weaken air tank causing a risk of air

tank rupture.

With tank pressure at approximately

20 psi, open the drain valve and tip the

outfit allowing all moisture to drain.

ON/AUTO - OFF SWITCH

Turn this switch ON to provide auto-

matic power to the pressure switch and

OFF to remove power at the end of each

use.

AIR INTAKE FILTER

This filter is designed to clean air

coming into the pump. This filter MUST

always be clean and ventilation open-

ings free from obstructions. See

"Maintenance".

Operating Procedures

STARTING

1. Before attaching air hose or

accessories, make sure the

OFF/AUTO lever is set to OFF and

the air regulator is closed. (Turn

counter-clockwise to close.)

2. Attach hose and accessories.

DRAIN VALVE

The drain valve is located at the base of

the air tank and is used to drain conden-

sation at the end of each use.

MOTOR THERMAL OVERLOAD

PROTECTOR

The electric motor has an automatic

thermal overload protector. If the motor

overheats for any reason, the thermal

overload protector will shut off the

motor. The motor must be allowed to

cool before restarting.

6. Always operate air compressor in

well-ventilated areas (free of

gasoline, flammable paint or solvent

vapors). Do not operate the

compressor near a spray area.

STOPPING

1. Set the OFF/AUTO lever to OFF.

2. Turn the regulator counter-clockwise

and set the outlet pressure to zero.

3. Remove air tool or accessory.

4. Open regulator and allow air to

slowly bleed from the tank. Close

regulator when tank pressure is

approximately 20 psi.

5. Drain water from air tank.

Incorrect use can

cause bursting,

fire or explosion hazards. Carefully

follow steps 3, 5, and 6 each time the

compressor is used.

3. Check manufacturer's maximum

pressure rating for air tools and

accessories. Regulator outlet

pressure must never exceed the

maximum pressure rating.

4. Turn OFF/AUTO lever to AUTO and

allow tank pressure to build. Motor

will stop when tank pressure reaches

"cut-out" pressure.

5. Open regulator by turning it clock-

wise. Adjust the regulator to the

correct pressure setting. Compressor

is now ready for use.

Speedaire Operating Instructions and Parts Manual

LIMITED WARRANTY

DAYTON ONE-YEAR LIMITED WARRANTY. Speedaire® Permanently Lubricated Twin Cylinder Air Compressor, Models

covered in this manual, are warranted by Dayton Electric Mfg. Co. (Dayton) to the original user against defects in workmanship

or materials under normal use for one year after date of purchase. Any part which is determined to be defective in material or

workmanship and returned to an authorized service location, as Dayton designates, shipping costs prepaid, will be, as the

exclusive remedy, repaired or replaced at Dayton’s option. For limited warranty claim procedures, see PROMPT DISPOSITION

below. This limited warranty gives purchasers specific legal rights, which vary from jurisdiction to jurisdiction.

LIMITATION OF LIABILITY. To the extent allowable under applicable law, Dayton’s liability for consequential and incidental

damages is expressly disclaimed. Dayton’s liability in all events is limited to and shall not exceed the purchase price paid.

WARRANTY DISCLAIMER. Dayton has made a diligent effort to provide product information and illustrate the products in

this literature accurately; however, such information and illustrations are for the sole purpose of identification, and do not

express or imply a warranty that the products are MERCHANTABLE, or FIT FOR A PARTICULAR PURPOSE, or that the products will

necessarily conform to the illustrations or descriptions. Except as provided below, no warranty or affirmation of fact, expressed

or implied, other than as stated in the “LIMITED WARRANTY” above is made or authorized by Dayton.

PRODUCT SUITABILITY. Many jurisdictions have codes and regulations governing sales, construction, installation, and/or

use of products for certain purposes, which may vary from those in neighboring areas. While Dayton attempts to assure that its

products comply with such codes, it cannot guarantee compliance, and cannot be responsible for how the product is installed

or used. Before purchase and use of a product, review the product applications, and all applicable national and local codes and

regulations, and be sure that the product, installation, and use will comply with them.

Certain aspects of disclaimers are not applicable to consumer products; e.g., (a) some jurisdictions do not allow the exclusion or

limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you; (b) also, some

jurisdictions do not allow a limitation on how long an implied warranty last, consequently the above limitation may not apply to

you; and (c) by law, during the period of the Limited Warranty, any implied warranties of implied merchantability or fitness for a

particular purpose applicable to consumer products purchased by consumers, may not be excluded or otherwise disclaimed.

PROMP DISPOSITION. Dayton will make a good faith effort for prompt correction or other adjustment with respect to any

product, which proves to be defective within limited warranty. For any product believed to be defective within limited warranty,

first write or call dealer from whom the product was purchased. Dealer will give additional directions. If unable to solve

satisfactorily, write to Dayton at address below, giving dealer’s name, address, date, and number of dealer’s invoice, and

describing the nature of the defect. Title and risk of loss pass to buyer on delivery to common carrier. If product was damaged

in transit to you, file claim with carrier.

Manufactured for Dayton Electric Mfg. Co., 5959 W. Howard St., Niles, Illinois 60714 U.S.A.

Model 4UP73

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

Speedaire Operating Instructions and Parts Manual 4UP73

Excessive tank pressure – safety valve

pops off

Air leaks at fittings

Air leaks at check valve

Air leaks at pressure switch release valve

Air leaks from air tank

1. Move the pressure switch lever to the

OFF position. If the outfit doesn't

shut off, and the electrical contacts are

welded together, replace the pressure

switch

If the contacts are good, check to see

if the pin in the bottom of the pressure

release valve is stuck. If it does not

move freely, replace the valve

2. Return the outfit to a 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

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

1. Remove and replace the release valve

2. 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 shutoff. Remove

and clean or replace check valve. DO NOT

OVER-TIGHTEN

Air tank must be replaced. Do not repair the

leak

DO NOT DRILL INTO,

WELD, OR OTHERWISE

MODIFY AIR TANK OR IT WILL WEAKEN

Performing repairs may expose voltage sources, moving parts, or compressed air sources. Personal

injury may occur. Prior to attempting any repairs unplug the power cord and bleed off air pressure.

Corrective Action

Symptom

Troubleshooting Chart

1. Pressure switch does not shut off

motor when compressor reaches

"cut-out" pressure

2. Pressure switch "cut-out" too high

Fittings are not tight enough

Defective or dirty check valve

1. Defective pressure switch valve

2. Defective check valve

Defective air tank

Possible Causes

Clean or replace regulator

If there is an excessive amount of pressure

drop when the accessory is used, adjust the

regulator

NOTE: Adjust the regulated pressure under

flow conditions (while accessory is being use)

Dirty or damaged regulator internal parts

It is normal for "some" pressure drop to occur

Regulator knob – continuous air leak

Regulator will not shut-off air outlet

Pressure reading on the regulated

pressure gauge drops when an accessory

is used

Speedaire Operating Instructions and Parts Manual

Troubleshooting Chart (Continued)

Possible defect in safety valve

1. Prolonged excessive use of air

2. Compressor is not large enough for air

requirement

3. Restricted air intake filter

4. Hole in hose

5. Check valve restricted

6. Air leaks

1. Motor overload protection switch has

tripped

2. Tank pressure exceeds pressure switch

"cut-in" pressure

3. Wrong gauge wire or length of extension

cord

4. Check valve stuck open

5. Loose electrical connections

6. Paint spray on internal motor parts

7. Possible defective motor

8. Fuse blown, circuit breaker tripped

9. Pressure release valve on pressure switch

has not unloaded head pressure

Defective check valve

Air leak from safety valve Operate safety valve manually by pulling on

ring. If valve still leaks, it should be replaced

1. Decrease amount of air usage

2. Check the accessory air

requirement. If it is higher than the

SCFM or pressure supplied by your air

compressor, you need a larger

compressor

3. Clean or replace air intake filter. Do

not operate the air compressor in a

paint spray area

4. Check and replace if required

5. Remove and clean or replace

6. Tighten fittings (See Air Leaks Section

of Troubleshooting Chart)

1. Let motor cool off and overload

switch will automatically reset

2. Motor will start automatically when

tank pressure drops below "cut-in"

pressure of pressure switch

3. Check for proper gauge wire and cord

length

4. Remove and clean or replace

5. Check wiring connection inside

pressure switch and terminal box area

6. Have checked at Service Center. Do

not operate the compressor in the

paint spray area. See flammable vapor

warning on page 2

7. Have checked at local Service Center

8. a. Check fuse box for blown fuse and

replace if necessary. Reset circuit

breaker. Do not use a fuse or circuit

breaker with higher rating than that

specified for your partiular branch

circuit

b. Check for proper fuse; only "Fusetron"

Type T fuses are acceptable

c. Check for low voltage conditions and/

or proper extension cord

d. Disconnect the other electrical

appliances from circuit or operate the

compressor on its own branch circuit

9. Bleed the line by pushing the lever on the

pressure switch to the OFF position; if

the valve does not open, replace it

Remove and clean or replace

Corrective Action

Symptom Possible Causes

Motor will not run

Knocking noise

Compressor is not supplying enough air to

operate accessories

Model 4UP73

Speedaire Operating Instructions and Parts Manual 4UP73

Figure 4 –Replacement Parts Illustration for Compressor Pump

For Replacement Parts, Call 1-800-323-0620

24 hours a day - 365 days a year

Please provide following information:

-Model number

-Serial number (if any)

-Part description and numbers as shown in parts list

Address parts correspondence to:

Grainger Parts Operations

P.O. Box 3074

1657 Shermer Road

Northbrook, IL 60065-3074 U.S.A.

18 27

Speedaire Operating Instructions and Parts Manual 4UP73

Part Number Qty.

Description

Ref.

No.

Replacement Parts List for Compressor Pump

1 Handle AC-0563 1

2 Pump Assembly D20954 1

3 Isolators ACG-19 3

4 Cup Saddle Mount ACG-18 2

5 Screw SSF-990 2

6 Check Valve AC-0631 1

7 Hex Washer Screw SSF-928 2

8 Nut Sleeve Assy. SSP-7813 1

9 Outlet Tube AC-0126 1

10 O’ring SSG-3105 3

11 Nut Tubing SSP-7821-1 3

12 Shroud, Front DAC-244 1

13 Fastener Assy. ACG-408 3

14 Shroud, Rear DAC-243 1

15 Intake Filter ACG-12 1

16 Intake Muffler Cover ACG-13 1

17 10-14 x 2.5 Pan Head Screw SSF-554 2

18 Power Cord Assy. SUDL-413-1 1

19 Screw Ground #8-32 SUDL-9-1 1

20 Strain Relief CAC-1392 1

21 #10-32 x 1 Screw SSF-556 1

22 Pressure Switch Cover AC-0556 1

23 Pressure Relief Tube CAC-1085-1 1

24 Nut Sleeve Assy. SSP-7811 1

25 Outlet Tube AC-0099 1

26 Console Cover AC-0011 1

27 Panel Mounting Ring CAC-61 1

28 Standpipe AC-0027 1

29 Safety Valve 97503734 1

30 Brass Tubing Insert SSP-9013 2

31 Pressure Switch AC-0636 1

32 Nipple SSP-480 1

33 Regulator AC-0007 1

34 RT hand Gauge AC-0009-1 1

35 LT hand Gauge AC-0010-1 1

36 Adapter H-2101 1

37 Wheel AC-0634 2

38 3/8-16 Hex Nut SSF-8080-ZN 2

39 Shoulder Bolt SSF-632 2

40 Screw, Self Tapping SSF-981 4

41 Rubber Bumper SST-5314-1 2

42 Drain Valve SS-2702 1

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

For Replacement Parts, Call 1-800-323-0620

24 hours a day - 365 days a year

Please provide following information:

-Model number

-Serial number (if any)

-Part description and numbers as shown in parts list

Address parts correspondence to:

Grainger Parts Operations

P.O. Box 3074

1657 Shermer Road

Northbrook, IL 60065-3074 U.S.A.

Figure 5 – Replacement Parts Illustration for Compressor Pump

Speedaire Operating Instructions and Parts Manual 4UP74

REPAIR AND MAINTENANCE KITS AVAILABLE

Speedaire Operating Instructions and Parts Manual 4UP73

Part Number Qty.Description

Ref.

No.

Replacement Parts List for Compressor Pump (Continued)

38 Motor D20532 1

39 Eccentric pin ACG-8 1

40 Inner counterbalance ACG-6 1

41 Washer ACG-9 1

42 Outer counterbalance ACG-7 1

43 Nut ACG-23 1

44 Fan ACG-22 1

45 Screw 39124607 1

46 Cylinder sleeve AC-0263 2

47 Connecting rod assy. ACG-400 2

48 O-ring SSG-8156 2

49 Valve plate assy. AC-0032 2

50 O-ring ACG-45 2

51 LT Head AC-0038 1

52 RT Head AC-0037 1

53 Intake muffler ACG-11 2

54 Screw SSF-927 8

■Connecting Rod Kit KK-5081 1

▲Valve Plate Assy. and O-Rings K-0383 1

■

▲■

▲

▲■

Speedaire Permanently Lubricated

Twin Cylinder Air Compressor

Speedaire Operating Instructions and Parts Manual 4UP73

Manufactured for Dayton Electric Mfg. Co.

Niles, IL 60714 U.S.A.

Notes

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