Central Pneumatic 93271 Installation manual

21 GALLON, 230 V~,

CAST IRON VERTICAL

AIR COMPRESSOR

93271

SET UP AND OPERATING INSTRUCTIONS

Distributed exclusively by Harbor Freight Tools®.

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our website at: http://www.harborfreight.com

Read this material before using this product.

Failure to do so can result in serious injury.

SAVE THIS MANUAL.

contained herein may be reproduced in any shape or form without the express written consent of

Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing

improvements, actual product may differ slightly from the product described herein. Tools required for

assembly and service may not be included.

For technical questions or replacement parts, please call 1-800-444-3353.

Manual revised 08j

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 2

SPECIFICATIONS

Maximum Air Pressure 115 PSI with Auto Shut-Off

Air Tank Capacity 21 Gallons

Air Flow Capacity 3.5 CFM at 90 PSI

8.8 CFM at 40 PSI

Electrical Requirements 230 V~ / 60 Hz / 7 A / 1 Phase

3 HP rated

Pump Stage Single

Air Outlet Size 1/4” - 18 NPT

Shipping Weight 152 Pounds

Power Cord 10’ - Electrical Plug Sold Separately

SAVE THIS MANUAL

You will need this manual for the safety warnings and precautions, assembly,

operating, inspection, maintenance and cleaning procedures, parts list and assembly

diagram. Keep your invoice with this manual. Write the invoice number on the inside

of the front cover. Keep this manual and invoice in a safe and dry place for future refer-

ence.

GENERAL SAFETY WARNINGS AND PRECAUTIONS

KEEP WORK AREA CLEAN AND DRY.1. Cluttered, damp, or wet work areas invite

injuries.

KEEP CHILDREN AWAY FROM WORK AREA.2. Do not allow children to handle

this product.

STORE IDLE EQUIPMENT.3. When not in use, tools and equipment should be

stored in a dry location to inhibit rust. Always lock up tools and equipment, and

keep out of reach of children.

DO NOT USE THIS PRODUCT IF UNDER THE INFLUENCE OF ALCOHOL OR4. DRUGS. Read warning labels on prescriptions to determine if your judgement or

reexes are impaired while taking drugs. If there is any doubt, do not attempt to

use this product.

USE EYE, HAND, AND HEARING PROTECTION.5. Wear ANSI approved safety

impact goggles, hearing protection, and heavy-duty work gloves when using this

product.

DRESS SAFELY.6. Do not wear loose clothing or jewelry, as they can become

caught in moving parts. Wear a protective hair covering to prevent long hair from

becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up

above elbows.

DO NOT OVERREACH.7. Keep proper footing and balance at all times to prevent

tripping, falling, back injury, etcetera.

REV 05j; 07f; 09a

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 3

INDUSTRIAL APPLICATIONS MUST FOLLOW OSHA REQUIREMENTS.8.

STAY ALERT.9. Watch what you are doing at all times. Use common sense. Do

not use this product when you are tired or distracted from the job at hand.

CHECK FOR DAMAGED PARTS.10. Before using this product, carefully check that

it will operate properly and perform its intended function. Check for damaged parts

and any other conditions that may affect the operation of this product. Replace or

repair damaged or worn parts immediately.

REPLACEMENT PARTS AND ACCESSORIES:11. When servicing, use only identi-

cal replacement parts. Only use accessories intended for use with this product.

Approved accessories are available from Harbor Freight Tools.

MAINTAIN THIS PRODUCT WITH CARE.12. Keep this product clean and dry for

better and safer performance.

MAINTENANCE:13. For your safety, service and maintenance should be performed

regularly by a qualied technician.

USE THE RIGHT TOOL FOR THE JOB.14. Do not attempt to force a small tool or

attachment to do the work of a larger industrial tool. There are certain applications

for which this tool was designed. It will do the job better and more safely at the

rate for which it was intended. Do not modify this tool, and do not use this tool for

a purpose for which it was not intended.

The warnings, precautions, and instructions discussed in this manual cannot cover15. all possible conditions and situations that may occur. The operator must under-

stand that common sense and caution are factors, which cannot be built into this

product, but must be supplied by the operator.

SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS

CAUTION:1. Fill the Air Compressor with a premium quality, 30-weight, non-deter-

gent oil before each use. Running the Air Compressor with no oil or low oil will

cause damage to the equipment.

Note: The oil reservoir has an optimal capacity of 30 ounces of oil.

MAKE SURE ALL TOOLS AND EQUIPMENT USED WITH THE AIR COMPRES-2. SOR ARE RATED TO THE APPROPRIATE CAPACITY. Do not use any tool or

equipment that does not operate at or above the PSI that the compressor’s regula-

tor is set to.

DRAIN AIR COMPRESSOR EVERY DAY.3. Do not allow moisture to build up inside

the Air Compressor. (See “INSPECTION, MAINTENANCE, AND CLEANING”

section of this manual.)

MAINTAIN A SAFE WORKING ENVIRONMENT.4. Keep the work area well lit.

Make sure there is adequate surrounding workspace. Always keep the work area

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 4

free of obstructions, grease, oil, trash, and other debris. Do not use the Air Com-

pressor in areas near ammable chemicals, dusts, and vapors.

AVOID INJURY:5. Never direct the pressurized air stream at people or animals.

DO NOT ALTER OR REMOVE THE FACTORY SEALED PRESSURE RELEASE6. VALVE (5A). (See Assy. Diagram A.)

DO NOT OPEN THE WATER DRAIN VALVE (10A) SO THAT7. MORE THAN

FOUR THREADS ARE SHOWING. (See Assy. Diagram A.)

AN EXTENSION CORD MUST8. NEVER BE USED WITH THIS ITEM. Connecting

this item to an outlet through an extension cord MAY CAUSE ELECTRICAL

DAMAGE TO THE MOTOR and could present a FIRE HAZARD. Longer air

hoses are typically safer and more effective than extension cords.

THIS UNIT REQUIRES A 230 V~, UL LISTED, TWISTLOCK PLUG (SOLD SEPA-9. RATELY) TO BE INSTALLED BY A QUALIFIED ELECTRICIAN BEFORE SETUP

OR USE.

THIS COMPRESSOR MAY REQUIRE A DEDICATED ELECTRICAL CIRCUIT AS10. THE AMPERAGE DRAW UNDER FULL LOAD COMBINED WITH USE OF ANY

OTHER ITEM MAY OVERLOAD YOUR CIRCUIT.

WARNING:11. This product contains or produces a chemical known to the State of

California to cause cancer and birth defects (or other reproductive harm).

(California Health & Safety Code § 25249.5, et seq.)

People with pacemakers should consult their physician(s) before use. Electromag-12.

netic elds in close proximity to heart pacemaker could cause pacemaker interfer-

ence or pacemaker failure.

REV 07f

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 5

UNPACKING

When unpacking, make sure the item is intact and undamaged. If any parts are

missing or broken, please call Harbor Freight Tools at the number shown on the cover of

this manual as soon as possible.

Find the bag/box that contains all hardware for mounting the parts that are shipped

detached.

ASSEMBLY

Before use, thread the Mufer/Air Filter (7A) assembly into the Cylinder Case (2B).

OPERATION

Note: For additional references to the parts listed below, refer to the Assembly Dia-

grams on pages 10, and 11.

To Check The Oil Level:

FIGURE A

Oil Breather (14B)

Oil Window (20B)

Front Cover (18B)

1. The Oil Window (20B) is used to determine if oil is needed. The oil level should

always be at the maximum level (red line on the Oil Window). (See Figure A, and

Assy. Diagram B.)

Unscrew2. (do not pull) the Oil Breather (14B) out. (See Figure A.)

If necessary, add a3. premium quality, 30-weight, non-detergent oil into the Oil Fill

Hole until the level of oil reaches the maximum level as indicated on the Oil Win-

dow (20B). The optimal capacity of the oil reservoir is 30 ounces. Do not overll.

Then thread the Oil Breather back into the Oil Fill Hole, being careful not to strip

the plastic threads.

REV 08l

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 6

To Turn The Air Compressor On:

Fully close the Water Drain Valve (10A).1. (See Assy. Diagram A.)

Pull on the Pressure Relief Valve (5A) briey to ensure that it does not stick.2.

Turn the Air Flow Valve (6A) to its “OFF” position.3.

Connect the air hose (not provided) to the Air Flow Valve (6A) of the Air Compres-4. sor. Then, connect the other end of the air hose to the pneumatic tool (not pro-

vided) that is to be used.

5. To extend the life of your air tools and equipment, it is recommended to install

an oiler and water lter in series (available from Harbor Freight Tools) with the Air

Output Line of the Air Compressor.

Note: Plug the Power Cord of the Air Compressor into a 230 V~ electrical source.

Pull6. up on the “ON/OFF” Power Switch (1A) to turn the Air Compressor on.

(Push down on the “ON/OFF” Power Switch to turn the Air Compressor off.)

Allow sufcient time for the Tank Pressure Gauge (4A) to indicate 7. 80 PSI before

using the Air Compressor.

Turn the Air Flow Valve (6A) to its “ON” position to allow air to the pneumatic tool.8.

With the Air Compressor turned on, the operation is automatic and under the con-9. trol of the automatic switches inside the box under the Power Switch (1A).

NEVER open the power switch box or adjust the controls within.

To Adjust The Air Output To The Pneumatic Tool:

Note: When adjusting the air pressure being forwarded to the pneumatic tool, you will

need to compare the pressure readings of both the Tank Pressure Gauge (3A) and

the Tool Pressure Gauge (4A). The reading on the Tank Pressure Gauge dictates

the maximum/minimum air pressure at which the Tool Pressure Gauge may also

be set.

With the Air Compressor running, and the air hose and pneumatic tool hooked up1. to the Air Compressor, pull up on the Tool Pressure Adjuster (2A). Turn the Tool

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 7

Pressure Adjuster clockwise to increase the air output to the tool, up to the work-

ing air pressure (115 PSI) as indicated on the Tank Pressure Gauge (3A). Never

exceed the maximum PSI for the tool being used or any component of the air

system.

Turn the Tool Pressure Adjuster (2A)2. counterclockwise to decrease the air output

to the tool.

To Use The Tank Pressure Relief Valve:

The Tank Pressure Relief Valve Ring (5A) is used when decompression is needed1.

quickly and efciently. It is also designed to release automatically if the compres-

sor pressurizes up to or beyond it’s safe limit.

To decompress the Air Tank (9A) pressure, press the “ON/OFF” Power Switch (1A)2. down to turn off the Air Compressor.

Pull out on the Tank Pressure Relief Valve Ring (5A) to immediately release air3. pressure in the Air Tank (9A).

To Empty Moisture From The Tank:

The Water Drain Valve (10A) is located underneath the Air Tank (9A), and should1. be used daily to release all trapped moisture through this valve. If this is not done,

condensation may cause Air Tank corrosion. (See Assy. Diagram A.)

WARNING: Do not open the Water Drain Valve (10A) so that more than four threads are

showing.

Push down on the “ON/OFF” Power Switch (1A) to turn off the Air Compressor.2. Then, unplug the Air Compressor’s Power Cord from the electrical outlet.

You may wish to lay a pan under the drain to collect the dirty water trapped within.3. Slowly and carefully unscrew (no more than four threads) the Water Drain Valve

(10A) until the compressed air and condensation begins to be released from the Air

Tank (9A). Allow sufcient time for all of the air and condensation to escape from

the Air Tank. Then, rmly retighten the Water Drain Valve.

IMPORTANT!

IF THE MOTOR STOPS UNEXPECTEDLY, the overload breaker may have

sensed an over-current condition, and stopped the motor to protect it. If this oc-

curs, shut off the pressure switch and wait at least 5 minutes. Release the air pressure

in the tank to ease restarting. Then press the breaker button to reset it, and turn on the

pressure switch. To help prevent this, ensure that this compressor is set up on a dedi-

cated circuit (one with no other equipment running on it), and that the distance from the

compressor to the circuit breaker panel is as short as possible. Extension cords should

not be used, and the outlet should not be far from the panel.

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 8

INSPECTION, MAINTENANCE, AND CLEANING

WARNING: Disconnect the Air Compressor from its electrical supply source before per-

forming any inspection, maintenance, or cleaning.

BEFORE EACH USE,1. inspect the general condition of the Air Compressor. Check

all air ttings for leaks. Check for loose screws, misalignment or binding of mov-

ing parts, cracked or broken parts, damaged power cord and plug, and any other

condition that may affect the safe operation of this tool. If abnormal noise or vibra-

tion occurs, immediately disconnect the Air Compressor from its electrical supply

source and have the problem corrected before further use.

Do not use damaged equipment.

DAILY:2. Check the Air Compressor oil level. If necessary, ll with a premium qual-

ity, 30-weight, non-detergent oil. NOTE: When checking the oil level, make sure to

unscrew (do not pull) the Oil Breather (14B). (See Assy. Diagram B.)

DAILY:3. Purge the Air Tank (9A) of all air and moisture to prevent corrosion. To do

so, slowly and carefully unscrew (no more than four threads) the Water Drain Valve

(10A) until the compressed air and condensation begins to be released from the Air

Tank. Allow sufcient time for all of the air and condensation to escape from the Air

Tank. Then, rmly retighten the Water Drain Valve. (See Assy. Diagram A.)

EVERY 100 HOURS OF USE:4. Clean the Air Filter (7A) with a mild solvent. Then,

dry and reattach the Air Filter. NOTE: Replace the Air Filter if it is too dirty to prop-

erly clean. (See Assy. Diagram A.)

EVERY 500 HOURS OR 12 MONTHS:5. Drain and replace the old oil with new, pre-

mium quality, 30-weight, non-detergent oil. When the Oil Drain (16A) is removed,

the old oil needs to be collected and disposed of in full accord with all applicable

waste disposal ordinances.

TO CLEAN6. : wipe with a damp cloth, using a mild detergent or mild solvent.

WHEN STORING7. : Keep the Air Compressor in a clean, dry location.

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS

MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR

MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE

IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO

REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR

EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN

BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER. THE BUYER ASSUMES

ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR

REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACE-

MENT PARTS THERETO.

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 9

PARTS LIST A / ASSEMBLY DIAGRAM

Part Description Qty.

1A ON/OFF Power Switch 1

2A Tool Pressure Adjuster 1

3A Tank Pressure Gauge 1

4A Tool Pressure Gauge 1

5A Pressure Release Valve 1

6A Air Flow Valve 1

7A Air Filter 1

9A Air Tank 1

10A Water Drain Valve 1

11A Quick Release Coupler 1

Part Description Qty.

12A Rubber Wheel 2

13A Washer 2

14A Nut 2

15A Fitting 1

16A Oil Drain Plug with Gasket 1

17A Foot 2

18A Unloader Valve 1

19A Polyurethane Unloader Tube 1

20A Copper Air Tube 1

10A

12A

13A 14A

15A

11A

16A

17A

18A 19A

20A

(Rear View with motor cover removed.)

SKU 93271 For technical questions, please call 1-800-444-3353. PAGE 10

Note: Some parts are listed and shown for illustration purposes only, and are not avail-

able individually as replacement parts.

PARTS LIST B / ASSEMBLY DIAGRAM B

Part Description Qty.

1B Bolt 4

2B Cylinder Case 1

3B Gasket 1

4B Valve Seat 1

5B Gasket 1

6B Cylinder 1

7B Compression Ring 2

8B Oil Scraping Ring 1

9B Piston 1

10B Gasket 1

11B Piston Pin 1

12B* End Cover 1

13B Crankshaft Retainer 2

14B Oil Breather 1

15B Connecting Rod 1

16B Gasket 1

17B Bolt 6

18B Front Cover 1

19B Gasket 1

Part Description Qty.

20B Oil Window 1

21B Crankshaft Bolt 1

22B Crankshaft 1

23B Crankshaft Case 1

24B* Stator 1

25B* Bearing 2

26B* Armature 1

27B Capacitor 1

28B Radiating Fan Wheel 1

29B Retainer Ring 1

30B Bolt 4

31B Screw 2

32B Radiating Cover 1

33B* Seal Washer 1

34B Motor Assembly 1

35B Overload Switch 1

*Not available individually. Must be ordered as

entire Motor Assembly (See part #34B).

Other manuals for 93271

Table of contents

Other Central Pneumatic Air Compressor manuals

Central Pneumatic

Central Pneumatic CentralPneumatic 69269 Assembly instructions

Central Pneumatic

Central Pneumatic 97080 User manual

Central Pneumatic

Central Pneumatic CENTRAL PNEUMATIC 47407 Parts list manual

Central Pneumatic

Central Pneumatic 90234 User manual

Central Pneumatic

Central Pneumatic 96068 Installation manual

Central Pneumatic

Central Pneumatic 94667 User manual

Central Pneumatic

Central Pneumatic 95275 Installation manual

Central Pneumatic

Central Pneumatic 39750 User manual

Central Pneumatic

Central Pneumatic 92403 Parts list manual

Central Pneumatic

Central Pneumatic 93271 User manual

Central Pneumatic

Central Pneumatic 61615 Assembly instructions

Central Pneumatic

Central Pneumatic 60637 User guide

Central Pneumatic

Central Pneumatic 62779 User manual

Central Pneumatic

Central Pneumatic Central Pneumatic 30 Gallon, 180 PSI Gas Powered Two-Stage Air... User manual

Central Pneumatic

Central Pneumatic 04169 User manual

Central Pneumatic

Central Pneumatic CentralPneumatic 17 GAL Assembly instructions

Central Pneumatic

Central Pneumatic PROFESSIONAL 99901 User manual

Central Pneumatic

Central Pneumatic 61454 User manual

Central Pneumatic

Central Pneumatic CENTRAL PNEUMATIC 95499 Parts list manual

Central Pneumatic

Central Pneumatic CentralPneumatic 68064 Installation manual

Central Pneumatic

Central Pneumatic 47915 User manual

Central Pneumatic

Central Pneumatic 65903 Installation manual

Central Pneumatic

Central Pneumatic 93657 Assembly instructions

Central Pneumatic

Central Pneumatic 42321 User manual

Popular Air Compressor manuals by other brands

Sparmax

Sparmax DC-25XR user manual

KAESER

KAESER M122 Service manual

GMC

GMC GAC1500 Original instructions

Briggs & Stratton

Briggs & Stratton Air Compressor Operator's manual

Fini

Fini F3GST2TK Operator's manual

Industrial Air

Industrial Air CP1580325 Operator's & parts manual

Campbell Hausfeld

Campbell Hausfeld RP3300 Easy setup guide

Ingersoll-Rand

Ingersoll-Rand UP6 20 HP Option manual

Hitachi

Hitachi EC99S Instruction manual and safety instructions

Parkside

Parkside PKO 270 A1 operating instructions

Sullair

Sullair 185 manual

Clas Ohlson

Clas Ohlson QIE-ZTH-15 manual

Ferm

Ferm CRM1046 Original instructions

BE AC153 Operation manual

RIDGID

RIDGID OF25150A Operator's manual

Johnson Controls

Johnson Controls QUANTUM LX Setup

Sears

Sears Craftsman 919.167463 owner's manual

Ring Automotive

Ring Automotive RAC700 instructions