Central Pneumatic 93742 Manuale utente

6” Random Orbit

Palm Sander

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

manual or any artwork contained herein may be reproduced in any shape or form

without the express written consent of Harbor Freight Tools.

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

93742

Due to continuing improvements, actual product may differ slightly from the product described herein.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 2

Specications

Save This Manual

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

instructions, operating and maintenance procedures, parts list and diagram. Keep

your invoice with this manual. Write the invoice number on the inside of the front

cover. Keep the manual and invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be

followed to reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools such

as air compressor in damp or wet locations. Don’t expose to rain. Keep work

area well lit. Do not use electrically powered tools in the presence of ammable

gases or liquids.

3. Keep children away. Children must never be allowed in the work area. Do

not let them handle machines, tools, or air lines.

4. Store idle equipment. When not in use, tools must be stored in a dry location

to inhibit rust. Always lock up tools and keep out of reach of children.

5. Use the right tool for the job. 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.

6. Dress properly while working. Do not wear loose clothing or jewelry as they

can be caught in moving parts. Protective, electrically nonconductive clothes

Construction Cast Aluminum Body, PVC Outer

Housing, and Brass Air Inlet Backing Pad 3/8” x 5-7/8”

Polyurethane Disc

Air Inlet

Dimensions 1/4”-18 NPT Female Speed 10,000 RPM

random orbital motion

Average Air

Consumption 7 CFM @ 90 PSI Max. Air

Pressure 90 PSI

Overall

Dimensions 5-¾”L x 4-½”W x 4-½”H Net Weight 2 Lbs.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 3

and nonskid footwear are recommended when working. Wear restrictive hair

covering to contain long hair.

7. Use eye and ear protection. Always wear ANSI approved impact safety

goggles. Wear a full face shield if you are producing metal lings or wood chips.

Wear an ANSI approved dust mask or respirator when working around metal,

wood, and chemical dusts and mists.

8. Do not overreach. Keep proper footing and balance at all times. Do not reach

over or across running machines.

9. Maintain tools with care. Keep tools clean and in good condition for better and

safer performance. Follow instructions for lubricating and changing accessories.

Inspect tool ttings and hoses periodically and, if damaged, have them repaired

by an authorized technician. The tool must be kept clean, dry, and free from oil

and grease at all times.

10. Disconnect Air Hose before maintenance. Never service the Sander, clear

jams, or disassemble with the air hose attached. Disconnect the Sander when

not in use.

11. Remove adjusting keys and wrenches. Check that keys and adjusting

wrenches are removed from the tool or machine work surface before connecting

it.

12. Avoid unintentional starting. Be sure the valve lever is in the Off position

when not in use and before attaching to pressure source.

13. Stay alert. Watch what you are doing, use common sense. Do not operate

any tool when you are tired.

14. Check for damaged parts. Before using any tool, any part that appears

damaged should be carefully checked to determine that it will operate properly

and perform its intended function. Check for alignment and binding of moving

parts; any broken parts or mounting xtures; and any other condition that may

affect proper operation. Any part that is damaged should be properly repaired

or replaced by a qualied technician. Do not use the tool if the trigger does not

operate properly.

15. Replacement parts and accessories. When servicing, use only identical

replacement parts. Use of any other parts will void the warranty. Only use

accessories intended for use with this tool. Approved accessories are available

from Harbor Freight Tools.

16. Compressed air only. Never use combustible gas as a power source.

17. Do not operate tool if under the inuence of alcohol or drugs. Read warning

labels on prescriptions to determine if your judgment or reexes are impaired

while taking drugs. If there is any doubt, do not operate the tool.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 4

18. Use proper size and type air pressure line and ttings. The recommended

air line for this tool is 3/8” ID delivering no more than 90 PSI.

19. Maintenance. For your safety, service and maintenance should be performed

regularly by a qualied technician.

20. Disconnect air supply before adjusting Sander or replacing Sanding Pad.

Before making any adjustments to the Sander make sure that the compressed

air is disconnected.

21. Use Sander on an appropriate work surface only. Test sander on a test

scrap of material before sanding the workpiece. Always wear ANSI approved

safety goggles during use and maintenance.

22. WARNING: Some dust created by power sanding, sawing, grinding, drilling,

and other construction activities, contain 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 or other masonry products

Arsenic and chromium from chemically treated lumber

The Brass components of this product contain lead, a chemical known to the

state of California to cause birth defects (or other reproductive harm).

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

Warning: The warnings, cautions, and instructions discussed in this instruction

manual cannot cover all possible conditions and situations that may occur. It

must be understood by the operator that common sense and caution are factors

which cannot be built into this product, but must be supplied by the operator.

Unpacking

When unpacking, check to make sure the following parts are included.

Palm Random Orbital Sander

6” Backing Pad

22 mm Chrome Plated Flat Wrench

If any parts are missing or broken, please call Harbor Freight Tools at the number

on the cover of this manual.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 5

Air Pressure Supply

This tool is designed to operate with a maximum air pressure of 90 PSI. You must

use an air regulator, set at 90 PSI or below.

In use, this tool will use, on average, 7 Cubic Feet per Minute of compressed air

at 90 PSI. For satisfactory performance, you must use an air compressor capable

of delivering this volume of air at the stated pressure.

We recommend that you use both a lter and an inline oiler in your air supply sys-

tem as illustrated in the diagram below. These components are not included with

this tool, but are available from Harbor Freight Tools.

If you do not use a lter and inline oiler, put a few drops of water displacement oil

into the air line before each use. After each use, the Palm Sander should be care-

fully drained of collected moisture and sprayed with a water displacement oil.

We recommend that you install a quick-release nipple (not included) into the

Regulator. Quick release connectors at all points in an air pressure system make

your work easier.

Air

Sander

Operation

Installing the Sanding Pad

1. Disconnect the air hose from the tool.

2. Select the appropriate sanding pad (not included), and press it onto the

Backing Pad (31). NOTE: You should always start with a sanding pad coarse

enough to remove saw marks and do preliminary shaping of the workpiece.

Then sand the workpiece with progressively ner grit sanding pads until the

desired surface is achieved. Do not move directly from a coarse grit sanding

pad to a much ner grit sanding pad. Doing so wastes time and causes

additional wear on you and the tool.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 6

Removing Backing Pad (31)

1. Disconnect tool from air supply.

Slide Wrench (36) under Skirt (30)

as shown in photo at right. Engage

Wrench with Pad Retainer (38).

2. Holding Wrench rmly, rotate Backing

Pad (31) counterclockwise to remove.

Replacing Backing Pad (31)

3. Press sanding pad onto a piece of scrap material, and operate tool briey.

This will seat sanding pad rmly on Backing Pad (31). Failure to seat

sanding pad may cause sanding pad to come loose, possibly causing

personal injury or property damage.

Using the tool

CAUTION: Whenever using this tool wear ANSI approved safety goggles.

4. Turn the air compressor (not included) on and allow the air tank to come up

to pressure. Set the compressor output regulator to no more than 90 PSI.

5. Attach the air supply hose (not included) to the tool.

6. Grip the base of the tool in one hand. The Valve Lever (1) will be under

your palm. Squeeze the tool to depress the Valve Lever (1) and the tool will

operate.

7. Place the tool on the work surface to begin sanding.

8. To stop sanding, lift the tool from the work surface, and relax your grip to

allow the Valve Lever (1) to lift into the closed position.

9. When you are done work, disconnect the air pressure hose from the tool,

and turn off the air compressor.

Removing Sanding pad

1. Disconnect air pressure hose from tool.

2. Hold tool with sanding pad upward. Peel sanding pad from Backing Pad (31).

NOTE: Do not store tool with sanding pad in place. Heat generated during

sanding may cause pad to bond to Backing Pad, making subsequent

Wrench (36)

Skirt (30)

Backing Pad (31)

SKU 93742 For technical questions, please call 1-800-444-3353. Page 7

1. Disconnect air pressure hose from tool

2. Place Wrench (36) onto Pad Retainer (38) and hold rmly.

3. Place Backing Pad (31) on Pad Retainer (38) and turn clockwise to attach.

Hand tighten rmly.

Maintenance

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 REPLACEMENT

PARTS THERETO.

1. Place a few drops of light weight air tool oil (not included) into the Regulator

each time before using the tool.

2. After each use, drain any accumulated moisture from the tool, and spray a

small amount of water displacing oil into and on the tool. Wipe clean.

3. Store tool in a safe location out of reach of children and unauthorized

persons.

Troubleshooting

Tool will not operate.

1. Possible cause: Low or no air pressure.

Solution: Check air compressor to be sure it is operating properly. Check Air

Regulator. Check air lines for leaking or blockage.

2. Possible cause: Corroded Rotor (39).

Solution: Spray light weight penetrating oil into the Regulator. If tool still

won’t operate, take it to a qualied service technician for repair.

3. Possible Cause: Damaged Seals or O rings.

Solution: Take it to a qualied service technician for repair.

NOTE: Some parts are listed and shown for illustration purposes only and are not available individually

as replacement parts.

SKU 93742 For technical questions, please call 1-800-444-3353. Page 8

Part Description QTY. Part Description QTY. Part Description QTY.

1VALVE LEVER 1 16 UPPER BEARING CASE 1 27 BASE RING 1

2SPRING PIN Ø3X25MM 1 17-1 CYLINDER 1 28 CAP SCREW (M4X12) 4

3BODY COVER 1 17-2 SPRING PIN Ø3X5MM 1 29 SCREW (M4X12) 1

4BODY 1 17-3 O-RING P7 1 30 SKIRT 1

5VALVE PIN SLEEVE 1 17-4 SPRING PIN Ø3X5MM 1 31 6” BACKING PAD 1

6WAVE WASHER 12MM 1 17-5 SPRING PIN Ø3X5MM 1 32 SILENCER SET 1

7O-RING P8 2 18 LOWER BEARING CASE 1 33 UPPER SIDE PLATE 1

8O-RING P4 X Ø7MM 1 19 BEARING (6000ZE) 1 34 LOWER SIDE PLATE 1

9VALVE 1 20 SHAFT W/HEAD (A) 1 35 SCREW (M5X10) 1

10 VALVE SPRING 1 21 H/R KEY (3X13) 1 36 FLAT WRENCH 1

11 PIN Ø3X22MM 1 22 BEARING (60012RS) 1 37 BALL BEARING (688ZE) 1

12 INLET 1 23 FELT RING (Ø18) 1 38 PAD RETAINER 1

13 SCREW M5X10 1 24 DUST SEAL 1 39 ROTOR 1

14 CONICAL WASHER M 1 25 SNAP RING (NR28) 1 40 VANE 5

15 (BEARING 6000ZE) 1 26 BODY GASKET 1

Parts List

Assembly Drawing

SKU 93742 For technical questions, please call 1-800-444-3353. Page 9

90 Day Warranty

Harbor Freight Tools Co. makes every effort to assure that its prod-

ucts meet high quality and durability standards, and warrants to

the original purchaser that this product is free from defects in ma-

terials and workmanship for the period of 90 days from the date

of purchase. This warranty does not apply to damage due directly

or indirectly, to misuse, abuse, negligence or accidents, repairs or

alterations outside our facilities, criminal activity, improper installa-

tion, normal wear and tear, or to lack of maintenance. We shall in

no event be liable for death, injuries to persons or property, or for

incidental, contingent, special or consequential damages arising

from the use of our product. Some states do not allow the exclusion

or limitation of incidental or consequential damages, so the above

limitation of exclusion may not apply to you. THIS WARRANTY IS

EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS

OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANT-

ABILITY AND FITNESS.

To take advantage of this warranty, the product or part must be re-

turned to us with transportation charges prepaid. Proof of purchase

date and an explanation of the complaint must accompany the mer-

chandise. If our inspection veries the defect, we will either repair

or replace the product at our election or we may elect to refund the

purchase price if we cannot readily and quickly provide you with a

replacement. We will return repaired products at our expense, but

if we determine there is no defect, or that the defect resulted from

causes not within the scope of our warranty, then you must bear the

cost of returning the product.

This warranty gives you specic legal rights and you may also have

other rights which vary from state to state.

3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA

93011 • (800) 444-3353

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