Central Pneumatic 66881 Installation manual

5” ORBITAL WET PALM
SANDER
66881
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.
Copyright©2009 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
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.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 2
CONTENTS
SAFETY ALERT SYMBOL AND
SIGNAL WORDS .............................3
IMPORTANT SAFETY
INSTRUCTIONS .......................... 3
GENERAL...........................................3
WORK AREA......................................3
PERSONAL SAFETY .........................4
TOOL USE AND CARE ...................... 4
SERVICE ............................................5
AIR SOURCE......................................5
SYMBOLS AND SPECIFIC
SAFETY INSTRUCTIONS ........... 5
SYMBOL DEFINITIONS .....................5
SPECIFIC SAFETY INSTRUCTIONS 6
FUNCTIONAL DESCRIPTION....... 8
SPECIFICATIONS ..............................8
COMPONENTS AND CONTROLS ....8
INITIAL TOOL SET UP/
ASSEMBLY.................................. 8
UNPACKING.......................................8
AIR SUPPLY.......................................8
OPERATING INSTRUCTIONS .... 10
TOOL SET UP ..................................10
WORK PIECE AND WORK AREA
SET UP .......................................... 10
GENERAL OPERATING
INSTRUCTIONS ............................10
USER-MAINTENANCE
INSTRUCTIONS ........................ 12
CLEANING, MAINTENANCE, AND
LUBRICATION...............................12
TROUBLESHOOTING......................13
PARTS LIST................................. 14
ASSEMBLY DIAGRAM................ 15
LIMITED 90 DAY WARRANTY .... 16

SKU 66881 For technical questions, please call 1-800-444-3353. Page 3
SAVE THIS MANUAL
Keep this manual for the safety warn-
ings and precautions, assembly, operat-
ing, inspection, maintenance and cleaning
procedures. Write the product’s serial
number in the back of the manual near the
assembly diagram (or month and year of
purchase if product has no number). Keep
this manual and the receipt in a safe and
dry place for future reference.
Safety Alert Symbol and Signal
Words
In this manual, on the labeling,
and all other information provid-
ed with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING
indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
IMPORTANT SAFETY
INSTRUCTIONS
INSTRUCTIONS PERTAINING
TO A RISK OF FIRE,
ELECTRIC SHOCK, OR
INJURY TO PERSONS
WARNING – When using tools, basic pre-
cautions should always be followed,
including the following:
General
a. To reduce the risks of electric
shock, re, and injury to persons,
read all the instructions before us-
ing the tool.
Work area
a. Keep the work area clean and well
lighted. Cluttered benches and dark
areas increase the risks of electric
shock, re, and injury to persons.
b. Do not operate the tool in explo-
sive atmospheres, such as in the
presence of ammable liquids,
gases, or dust. The tool is able to
create sparks resulting in the ignition
of the dust or fumes.
c. Keep bystanders, children, and
visitors away while operating the

SKU 66881 For technical questions, please call 1-800-444-3353. Page 4
tool. Distractions are able to result in
the loss of control of the tool.
Personal safety
a. Stay alert. Watch what you are do-
ing and use common sense when
operating the tool. Do not use the
tool while tired or under the inu-
ence of drugs, alcohol, or medica-
tion. A moment of inattention while
operating the tool increases the risk
of injury to persons.
b. Dress properly. Do not wear loose
clothing or jewelry. Contain long
hair. Keep hair, clothing, and
gloves away from moving parts.
Loose clothes, jewelry, or long hair
increases the risk of injury to persons
as a result of being caught in moving
parts.
c. Avoid unintentional starting. Be
sure the switch is off before con-
necting to the air supply. Do not
carry the tool with your nger on the
switch or connect the tool to the air
supply with the switch on.
d. Remove adjusting keys and
wrenches before turning the tool
on. A wrench or a key that is left
attached to a rotating part of the tool
increases the risk of personal injury.
e. Do not overreach. Keep proper
footing and balance at all times.
Proper footing and balance enables
better control of the tool in unexpect-
ed situations.
f. Use safety equipment. A
dust mask, non-skid safety
shoes and a hard hat must
be used for the applicable
conditions. Wear heavy-duty work
gloves during use.
g. Always wear eye protec-
tion. Wear ANSI-ap-
proved safety goggles.
h. Always wear hearing
protection when using
the tool. Prolonged expo-
sure to high intensity noise
is able to cause hearing loss.
Tool use and care
a. Use clamps or another practical
way to secure and support the
workpiece to a stable platform.
Holding the work by hand or against
the body is unstable and is able to
lead to loss of control.
b. Do not force the tool. Use the
correct tool for the application. The
correct tool will do the job better and
safer at the rate for which the tool is
designed.
c. Do not use the tool if the switch
does not turn the tool on or off.
Any tool that cannot be controlled
with the switch is dangerous and
must be repaired.
d. Disconnect the tool from the air
source before making any adjust-
ments, changing accessories, or
storing the tool. Such preventive
safety measures reduce the risk of
starting the tool unintentionally. Turn
off and detach the air supply, safely
discharge any residual air pressure,
and release the throttle and/or turn
the switch to its off position before
leaving the work area.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 5
e. Store the tool when it is idle out of
reach of children and other un-
trained persons. A tool is dangerous
in the hands of untrained users.
f. Maintain the tool with care. Keep a
cutting tool sharp and clean. A prop-
erly maintained tool, with sharp cut-
ting edges reduces the risk of binding
and is easier to control.
g. Check for misalignment or bind-
ing of moving parts, breakage of
parts, and any other condition that
affects the tool’s operation. If dam-
aged, have the tool serviced before
using. Many accidents are caused
by poorly maintained tools. There is a
risk of bursting if the tool is damaged.
h. Use only accessories that are
identied by the manufacturer for
the specic tool model. Use of an
accessory not intended for use with
the specic tool model, increases the
risk of injury to persons.
Service
a. Tool service must be performed
only by qualied repair personnel.
b. When servicing a tool, use only
identical replacement parts. Use
only authorized parts.
c. Use only the lubricants supplied
with the tool or specied by the
manufacturer.
Air source
a. Never connect to an air
source that is capable of
exceeding 200 psi. Over
pressurizing the tool may
cause bursting, abnormal operation,
breakage of the tool or serious injury
to persons. Use only clean, dry,
regulated compressed air at the rated
pressure or within the rated pressure
range as marked on the tool. Always
verify prior to using the tool that the
air source has been adjusted to the
rated air pressure or within the rated
air-pressure range.
b. Stay within the maximum air pressure
capacity (90 PSI). Never operate the
Sander above 90 PSI.
c. Never use oxygen, carbon dioxide,
combustible gases or any bottled
gas as an air source for the tool.
Such gases are capable of explosion
and serious injury to persons.
SAVE THESE
INSTRUCTIONS.
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
Symbol Property or statement
noNo-load speed
.../min Revolutions or reciprocation per
minute
PSI Pounds per square inch of pressure
CFM Cubic Feet per Minute ow
SCFM Cubic Feet per Minute ow at
standard conditions
NPT National pipe thread, tapered
Chart continued in next column.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 6
Symbol Denitions
Symbol Property or statement
NPS National pipe thread, straight
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
eye protection.
WARNING marking concerning Risk
of Hearing Loss. Wear hearing
protection.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSH-
approved dust mask/respirator.
WARNING marking concerning Risk
of Explosion.
Specic Safety Instructions
1. The warnings and precautions dis-
cussed in this 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.
2. WARNING: Some dust created by
power sanding, sawing, grinding, drill-
ing, 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 or other masonry products
• Arsenic and chromium from chemi-
cally treated lumber
Your risk from these exposures var-
ies, depending on how often you do
this type of work. To reduce your
exposure to these chemicals: work in
a well ventilated area, and work with
approved safety equipment, such as
those dust masks that are specially
designed to lter out microscopic
particles. (California Health & Safety
Code § 25249.5, et seq.)
WARNING: The brass components
of this product contain lead, a chemi-
cal known to the State of California
to cause birth defects (or other repro-
ductive harm). (California Health &
Safety code § 25249.5, et seq.)
3. Only use with accessories rated to
handle the forces exerted by this tool
during operation. Other accessories
not designed for the forces gener-
ated may break and forcefully launch
pieces.
4. Attach all accessories properly to the
tool before connecting the air sup-
ply. A loose accessory may detach or
break during operation.
5. Obey the manual for the air compres-
sor used to power this tool.
6. Install an in-line shutoff valve to allow
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
7. Always use 5 inch diameter Sanding
Paper with this tool. Sanding Paper
that does not match the Pad (26)
diameter of the Sander will run ec-
centrically, causing loss of control or
may y off the Sander.
8. The Pad (26) and Sanding Paper will
become hot while sanding. Allow the
Pad and Sanding Paper to complete-
ly cool before handling.
9. To avoid injury, keep hands and n-
gers away from the rotating Pad (26).
If both hands are holding the Sander,

SKU 66881 For technical questions, please call 1-800-444-3353. Page 7
your hands and ngers cannot be cut
by the rotating Pad or Sanding Paper
(not included).
10. Do not lay the tool down until it has
come to a complete stop. Moving
parts can grab the surface and pull
the tool out of your control.
11. Disconnect air hose and release any
built-up air pressure. Never service
the Sander with the air hose at-
tached. Always release any built-up
air pressure in the tool (even after
disconnecting the air hose).
Vibration Precautions
This tool vibrates during use. Repeat-
ed or long-term exposure to vibration may
cause temporary or permanent physical
injury, particularly to the hands, arms and
shoulders. To reduce the risk of vibration-
related injury:
1. Anyone using vibrating tools regu-
larly or for an extended period should
rst be examined by a doctor and
then have regular medical check-
ups to ensure medical problems are
not being caused or worsened from
use. Pregnant women or people who
have impaired blood circulation to
the hand, past hand injuries, nervous
system disorders, diabetes, or Ray-
naud’s Disease should not use this
tool. If you feel any symptoms related
to vibration (such as tingling, numb-
ness, and white or blue ngers), seek
medical advice as soon as possible.
2. Do not smoke during use. Nicotine
reduces the blood supply to the
hands and ngers, increasing the risk
of vibration-related injury.
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration
when there is a choice.
5. Include vibration-free periods each
day of work.
6. Grip tool as lightly as possible (while
still keeping safe control of it). Let
the tool do the work.
7. To reduce vibration, maintain tool as
explained in this manual. If abnormal
vibration occurs, stop immediately.
SAVE THESE
INSTRUCTIONS.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 8
FUNCTIONAL DESCRIPTION
Specications
Operating Air Pressure 90 PSI
Air Inlet 1/4” -18 NPT
Maximum Speed* 10,000 RPM
Air Consumption 9 SCFM @ 90 PSI
* Maximum speed at stated maximum air pressure. Ex-
cess air pressure is hazardous and may cause the tool
to exceed stated maximum speed.
Components and Controls
Valve Lever (9)
Anchor (33)
Compressor
Inlet (11a)
Strainer (35)
(not shown)
Adjuster (34)
Hose Joint (12)
Hose (32)
Pad (26)
Figure 1
INITIAL TOOL SET UP/
ASSEMBLY
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.
Unpacking
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon
as possible.
• This air tool may be shipped with a
protective plug covering the air inlet.
Remove this plug before set up.
Air Supply
TO PREVENT
EXPLOSION:
Use only clean, dry, regulated,
compressed air to power this
tool. Do not use oxygen,
carbon dioxide, combustible
gases, or any other bottled
gas as a power source for this
tool.
Quick
Coupler
Recommended Air Line Components
Regulator with
Pressure Gauge
Quick
Coupler Air Hose
on Reel
Valve FilterOiler
Male
Connector
Tool
Air
Compressor
Male
Connector

SKU 66881 For technical questions, please call 1-800-444-3353. Page 9
1. Incorporate a lter, regulator with
pressure gauge, oiler, in-line shutoff
valve, and quick coupler for best ser-
vice, as shown in the diagram above.
An in-line shutoff ball valve is an
important safety device because it
controls the air supply even if the
air hose is ruptured. The shutoff
valve should be a ball valve be-
cause it can be closed quickly.
Note: If an automatic oiler system is not
used, add a few drops of Pneumatic
Tool Oil to the airline connection be-
fore operation. Add a few more drops
after each hour of continual use.
2. Attach an air hose to the compres-
sor’s air outlet. Connect the air hose
to the air inlet of the tool. Other com-
ponents, such as a connector and
quick coupler, will make operation
more efcient, but are not required.
WARNING! TO PREVENT SERIOUS
INJURY FROM ACCIDENTAL
OPERATION:
Do not install a female quick
coupler on the tool. Such a coupler
contains an air valve that will allow
the air tool to retain pressure and
operate accidentally after the air
supply is disconnected.
Note: Air ow, and therefore tool perfor-
mance, can be hindered by under-
sized air supply components.
3. The air hose must be long enough
to reach the work area with enough
extra length to allow free movement
while working.
4. Release the Paddle; refer to Opera-
tion section for description of con-
trols.
5. Close the in-line safety valve be-
tween the compressor and the tool.
6. Turn on the air compressor according
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
7. Adjust the air compressor’s output
regulator so that the air output is
enough to properly power the tool,
but the output will not exceed the
tool’s maximum air pressure at any
time. Adjust the pressure gradually,
while checking the air output gauge
to set the right pressure range.
8. Inspect the air connections for leaks.
Repair any leaks found.
9. If the tool will not be used at this
time, turn off and detach the air sup-
ply, safely discharge any residual air
pressure, and release the Paddle to
prevent accidental operation.
Note: Residual air pressure should not be
present after the tool is disconnected
from the air supply. However, it is a
good safety measure to attempt to
discharge the tool in a safe fashion
after disconnecting to ensure that the
tool is disconnected and unpowered.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 10
OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
Inspect tool before use, looking
for damaged, loose, and
missing parts. If any problems
are found, do not use tool until
repaired.
Tool Set Up
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Release the Paddle (9) of the
Sander, detach the air supply,
and safely discharge any
residual air pressure in the
Sander before performing any
inspection, maintenance, or
cleaning procedures.
TO PREVENT SERIOUS
INJURY:
Do not adjust or tamper with
any control or component in a
way not specically explained
within this manual. Improper
adjustment can result in
tool failure or other serious
hazards.
1. Press a 5” diameter sand paper disc
(not included) onto the Sander’s Pad
(26).
2. Place the Sander’s Anchor (33) in a
container lled with cold, clean water.
3. Attach the free end of the Hose (32)
to the Sander by pushing it into the
Hose Joint (12). (To remove, push the
collar and pull the hose out. Prior to
reattachment, trim 1/4” from the end
of the hose.)
4. Turn Adjuster (34) in either direction
to regulate ow of water.
CAUTION! Use only cold, clean wa-
ter. Never run the Wet Sander without
a water supply.
5. Connect a compressed air supply
hose (not included) to the Sander.
6. Turn on the air compressor, and set
its regulator to 90 PSI. Do not ex-
ceed 90 PSI.
Work Piece and Work Area Set Up
1. Designate a work area that is clean
and well-lit. The work area must not
allow access by children or pets to
prevent injury and distraction.
2. Route the air hose and water hose
along a safe route to reach the work
area without creating a tripping haz-
ard or exposing the hoses to possible
damage. The hoses must be long
enough to reach the work area with
enough extra length to allow free
movement while working.
3. Secure loose workpieces using a vise
or clamps (not included) to prevent
movement while working.
4. There must not be hazardous ob-
jects (such as utility lines or foreign
objects) nearby that will present a
hazard while working.
5. Work surface must be free of any
metal objects.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 11
General Operating Instructions
1. If an automatic oiler is not used, add
a few drops of Pneumatic Tool Oil
to the airline connection before use.
Add a few drops more after each
hour of continual use.
2. Grip the Sander rmly. Then squeeze
the Paddle (9) and allow the Pad (26)
to move in its orbital motion to its
fullest speed.
3. To adjust the water ow rate of the
Sander, turn the Adjuster (34) located
on the Anchor (33).
4. Sand the workpiece evenly with
gentle, broad, sweeping strokes in a
criss-cross pattern.
5. During the sanding process, it may
become necessary to occasionally
stop the Sander, disconnect the
tool from its compressed air supply
source, remove any remaining
compressed air from the tool by
squeezing its Paddle (9), and replace
the worn Sand Paper Disc with a new
Disc.
6. Once the sanding is completed,
release pressure on the Paddle (9) to
stop the Sander. Remove the Anchor
(33) from its container of water.
Raise the Hose above the Sander
and restart the Sander to empty the
tool of any remaining water. Turn
off the air compressor. Disconnect
the Sander from its air supply hose.
Then squeeze the Paddle once again
to release any remaining compressed
air from the tool.
7. Make sure to store the Sander in a
clean, dry, safe location out of reach
of children and other unauthorized
people.
8. If the tool requires more force to
accomplish the task, verify that the
tool receives sufcient, unobstructed
airow (CFM) and increase the
pressure (PSI) output of the regulator
up to the maximum air pressure
rating of this tool.
CAUTION! TO PREVENT TOOL
AND ACCESSORY FAILURE,
RESULTING IN INJURY:
Do not exceed the tool’s maximum
air pressure rating of 90 PSI.
If the tool still does not have sufcient
force at maximum pressure and
sufcient airow, then a larger tool
may be required.
9. To prevent accidents, turn off the
tool, detach the air supply, safely
discharge any residual air pressure in
the tool, and release the Paddle after
use. Clean external surfaces of the
tool with a clean, dry cloth, and apply
a thin coat of tool oil to metal surfac-
es. Then store the tool indoors out of
children’s reach.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 12
USER-MAINTENANCE
INSTRUCTIONS
Procedures not specically
explained in this manual
must be performed only by a
qualied technician.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Release the Paddle (9) of the
Sander, detach the air supply,
and safely discharge any
residual air pressure in the
Sander before performing any
inspection, maintenance, or
cleaning procedures.
TO PREVENT SERIOUS
INJURY FROM TOOL
FAILURE:
Do not use damaged
equipment. If abnormal
noise, vibration, or leaking
air occurs, have the problem
corrected before further use.
TO PREVENT EXPLOSION:
Lubricate the tool only
with specied lubricants.
Lubricate the air inlet
using only pneumatic tool
oil. Lubricate the internal
mechanism using only
white lithium grease. Other
lubricants may damage the
mechanism and may be
highly ammable, causing an
explosion.
Cleaning, Maintenance, and
Lubrication
Note: These procedures are in addition to
the regular checks and maintenance
explained as part of the regular op-
eration of the air-operated tool.
1. Daily - Air Supply Maintenance:
Every day, perform maintenance on
the air supply according to the com-
ponent manufacturers’ instructions.
The lubricator’s oil level needs to be
maintained and the moisture lter
must be regularly drained. Performing
routine maintenance on the air supply
will allow the Sander to operate more
safely and will also reduce wear on
the Sander.
2. BEFORE EACH USE, inspect the
general condition of the Sander.
Check for loose parts, misalignment
or binding of moving parts, cracked
or broken parts, damaged hose, and
any other condition that may affect its
safe operation.
3. DAILY, check the Strainer (35) in
the Anchor (33) for excess dirt and
debris. If necessary, clean Strainer.
(See Assy. Diagram.)

SKU 66881 For technical questions, please call 1-800-444-3353. Page 13
Troubleshooting
Problem Possible Causes Likely Solutions
Sander will not
start.
1. No compressed air supply.
2. Shut-off Valve is closed.
3. Insufcient pressure on the
Paddle.
4. Air pressure too low.
5. Regulator set too low.
1. Connect Sander to a compressed air supply.
2. Open Shut-off Valve.
3. Press harder on Paddle.
4. Set air compressor regulator to 90 PSI.
5. Adjust regulator setting.
Sand Paper Disc
not orbiting, or
orbiting slowly.
1. Air pressure too low.
2. Insufcient compressed air
supply.
3. Regulator Set adjusted too
low.
4. Leaks in Air Hose.
1. Squeeze harder on the Paddle.
2. Set air compressor regulator to 90 PSI.
3. Adjust Regulator Set for a higher orbital
speed.
4. Check Air Hose joints for leaks.
Water ow low or
nonexistent
1. Water Flow Control improperly
set.
2. Clogged Strainer.
3. No water in supply tank.
1. Adjust Water Flow Adjuster for increased
water ow.
2. Remove Strainer and clean.
3. Fill supply tank.
Sander does
not remove
residue from the
workpiece, even
after repeated brief
attempts.
1. Sand paper disc too ne.
2. Using wrong tool for the job at
hand.
3. Water Flow Control improperly
set.
4. Fill supply tank.
1. Use a more coarse sand paper disc.
2. Do not continue sanding to avoid damaging
workpiece surface. Use another method to
remove residue.
3. Adjust Water Flow Adjuster for increased
water ow.
4. Fill supply tank.
Severe air
leakage.
(Slight air leakage
is normal,
especially on older
tools.)
1. Cross-threaded housing
components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Check for incorrect alignment and uneven
gaps. If cross-threaded, disassemble and
replace damaged parts before use.
2. Tighten housing assembly. If housing cannot
tighten properly, internal parts may be
misaligned.
3. Replace damaged components.
4. Clean or replace valve assembly.
Sander does not
remove adequate
material
1. Worn sandpaper.
2. Fine grit sandpaper.
1. Replace sandpaper/
2. Use coarser grit sandpaper.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect air supply before service.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 14
Part Description Qty
1 Body 1
2 Pin 1
3 Spring 1
4 O-Ring 1
5 O-Ring 1
6 Valve Pin 1
7 O-Ring 1
8 Valve Pin Sleeve 1
9 Paddle 1
10 Pin 1
11a Compressor Inlet 1
11b Air Inlet 1
12 Hose Joint 1
13 Screw 4
14 Pillar 4
15 W-Nozzle Body 1
16 Screw 4
17 Bearing 1
18 Rotor 1
19 Hose Joint 3
Part Description Qty
20 O-Ring 1
21 Rotor Cover 1
22 Screw 1
23 Body Cover 1
24 Top Cover 1
25 Air Pin 1
26 Pad 1
27 Screw 4
28 Body Cover 1
29 Hose 1
30 Hose 1
31 Hose 1
32 Hose 1
33 Anchor 1
34 Adjuster 1
35 Strainer 1
36 Snap Ring 1
37 O-Ring 2
38 Spring 1
39 O-Ring 1
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
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.
PARTS LIST

SKU 66881 For technical questions, please call 1-800-444-3353. Page 15
ASSEMBLY DIAGRAM
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not avail-
able individually as replacement parts.

SKU 66881 For technical questions, please call 1-800-444-3353. Page 16
90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that this prod-
uct is free from defects in materials 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 installation, 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 EXPRESS-
LY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the com-
plaint must accompany the merchandise. If our inspection veries the defect, we will ei-
ther 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 re-
paired 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 • [phone]