Chicago Electric 66508 User manual

50 FT. DRAIN CLEANER
WITH POWER FEED
66508
ASSEMBLY AND OPERATING INSTRUCTIONS
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©2008 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.
Revised Manual 09b, 09k

Page 2SKU 66508 For technical questions, please call 1-800-444-3353
SPECIFICATIONS
Electric Motor 1/3 HP
1785 RPM
Power Cord #16 AWG X 3C, 6’4” long
Power Input 120 V~ / 60 Hz / 4.7 A (running)
Cable Type
Spring Steel with Coupler End
50’ L x ½” Cable Diameter
(0.123” Wire Diameter)
Pipe
Compatibility
For use with pipes having
2” to 4” I.D.
CAUTION: DO NOT USE THIS DRAIN
CLEANER ON DRAIN LINES SMALLER
THAN TWO INCHES. DAMAGE MAY OC-
CUR TO EQUIPMENT OR PIPES.
SAVE THIS MANUAL
You will need the manual for the safety
warnings and precautions, assembly instruc-
tions, 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.
GENERAL SAFETY RULES
WARNING!
READ AND UNDERSTAND ALL
INSTRUCTIONS
Failure to follow all instructions listed
below may result in electric shock,
re, and/or serious injury.
SAVE THESE INSTRUCTIONS
Work Area
Keep your work area clean and well1.
lit. Cluttered benches and dark areas
invite accidents.
Do not operate power tools in ex-2.
plosive atmospheres, such as in
the presence of ammable liquids,
gases, or dust. Power tools create
sparks which may ignite the dust or
fumes.
Keep bystanders, children, and visi-3.
tors away while operating a power
tool. Distractions can cause you to
lose control. Protect others in the work
area from debris such as chips and
sparks. Provide barriers or shields as
needed.
Electrical Safety
Avoid body contact with grounded1.
surfaces such as pipes, radiators,
ranges, and refrigerators. There is
an increased risk of electric shock if
your body is grounded.
Do not expose power tools to rain2.
or wet conditions. Water entering
a power tool will increase the risk of
electric shock.
Grounded tools must be plugged3.
into an outlet properly installed and
grounded in accordance with all
codes and ordinances. Never remove
the grounding prong or modify the plug
in any way. Do not use any adapter
plugs. Check with a qualied electri-
cian if you are in doubt as to whether
the outlet is properly grounded. If the
tools should electrically malfunction or
break down, grounding provides a low
resistance path to carry electricity away
from the user.
Double insulated tools are equipped4.
with a polarized plug (one blade is
wider than the other). This plug will
t in a polarized outlet only one way. If
the plug does not t fully in the outlet,
reverse the plug. If it still does not t,
contact a qualied electrician to install
a polarized outlet. Do not change the
plug in any way. Double insulation
REV 09b, 09k

Page 3SKU 66508 For technical questions, please call 1-800-444-3353
eliminates the need for the three wire
grounded power cord and grounded
power supply system.
Do not abuse the Power Cord.5. Never
use the Power Cord to carry the tools
or pull the Plug from an outlet. Keep
the Power Cord away from heat, oil,
sharp edges, or moving parts. Replace
damaged Power Cords immediately.
Damaged Power Cords increase the
risk of electric shock.
When operating a power tool out-6.
side, use an outdoor extension cord
marked “W-A” or “W”. These exten-
sion cords are rated for outdoor use,
and reduce the risk of electric shock.
Personal Safety
Stay alert.1. Watch what you are doing,
and use common sense when operat-
ing a power tool. Do not use a power
tool while tired or under the inuence
of drugs, alcohol, or medication. A
moment of inattention while operating
power tools may result in serious per-
sonal injury.
Dress properly.2. Do not wear loose
clothing or jewelry. Contain long hair.
Keep your hair, clothing, and gloves
away from moving parts. Loose
clothes, jewelry, or long hair can be
caught in moving parts.
Avoid accidental starting.3. Be sure
the Power Switch is off before plugging
in. Carrying power tools with your n-
ger on the Power Switch, or plugging
in power tools with the Power Switch
on, invites accidents.
Remove adjusting keys or wrenches4.
before turning the power tool on. A
wrench or a key that is left attached to
a rotating part of the power tool may
result in personal injury.
Do not overreach.5. Keep proper foot-
ing and balance at all times. Proper
footing and balance enables better
control of the power tool in unexpected
situations.
Use safety equipment.6. Always wear
eye protection. Dust mask, nonskid
safety shoes, hard hat, or hearing pro-
tection must be used for appropriate
conditions.
Tool Use and Care
Do not force the tool.1. Use the correct
tool for your application. The correct
tool will do the job better and safer at
the rate for which it is designed.
Do not use the power tool if the2.
Power Switch does not turn it on or
off. Any tool that cannot be controlled
with the Power Switch is dangerous
and must be replaced.
Disconnect the Power Cord Plug3.
from the power source before mak-
ing any adjustments, changing ac-
cessories, or storing the tool. Such
preventive safety measures reduce the
risk of starting the tool accidentally.
Store idle tools out of reach of chil-4.
dren and other untrained persons.
Tools are dangerous in the hands of
untrained users.
Check for misalignment or binding5.
of moving parts, breakage of parts,
and any other condition that may af-
fect the tool’s operation. If damaged,
have the tool serviced before using.
Many accidents are caused by poorly
maintained tools.
Use only accessories that are rec-6.
ommended by the manufacturer for
your model. Accessories that may be
suitable for one tool may become haz-
ardous when used on another tool.

Page 4SKU 66508 For technical questions, please call 1-800-444-3353
Service
Tool service must be performed7.
only by qualied repair personnel.
Service or maintenance performed by
unqualied personnel could result in a
risk of injury.
When servicing a tool, use only8.
identical replacement parts. Follow
instructions in the “Inspection, Mainte-
nance, And Cleaning” section of this
manual. Use of unauthorized parts or
failure to follow maintenance instruc-
tions may create a risk of electric shock
or injury.
SPECIFIC SAFETY RULES
FOR THIS PRODUCT
Maintain labels and nameplates on1.
the Drain Cleaner. These carry im-
portant information. If unreadable or
missing, contact Harbor Freight Tools
for a replacement.
Always wear ANSI-approved safety2.
impact eye goggles and heavy,
leather work gloves when using the
Drain Cleaner. Never grasp a rotating
cable with a rag or cloth glove. Using
personal safety devices reduce the risk
for injury. Safety impact eye goggles
and heavy work gloves are available
from Harbor Freight Tools.
Avoid unintentional starting.3. Make
sure you are prepared to begin work
before turning on the Drain Cleaner.
Do not force the Drain Cleaner.4. This
tool will do the work better and safer
at the speed and capacity for which it
was designed.
Maintain a safe working environ-5.
ment. Keep the work area well lit.
Make sure there is adequate surround-
ing workspace. Always keep the work
area free of obstructions, grease, oil,
trash, and other debris. Do not use
a power tool in areas near ammable
chemicals, dusts, and vapors
Always unplug the Drain Cleaner6.
from its electrical outlet before
performing any inspection, mainte-
nance, or cleaning procedures.
Never leave the Drain Cleaner unat-7.
tended while running. Turn power off if
you have to leave the Drain Cleaner.
Before each use, check all nuts,8.
bolts, and screws for tightness.
Vibration during operation may cause
these to loosen.
Avoid electrical shock.9. Do not op-
erate the Drain Cleaner if sitting in
standing water, and if the operator is in
standing water. Keep extension cord off
the ground and away from water. Water
increases the risk of electric shock.
Always connect the Line Cord to10.
a Ground Fault Circuit Interrupter
(GFCI) protected electrical outlet.
Install this product on a proper sur-11.
face. Locate on a at, level, and solid
surface that is capable of supporting
the weight of the Drain Cleaner.
Never operate the Drain Cleaner with12.
the belt guard removed. Fingers can
get caught between the drive belt and
pulley.
Do not overstress cable.13. Keep gloved
hand on the cable for control when ma-
chine is running. In the course of drain
cleaning, if the cable encounters an
obstruction, it may stress the cable and
cause the cable to twist, kink, or break.
This may result in serious injury, and
damage the equipment or pipes.
Position Drain Cleaner within two14.
feet of drain opening. Greater dis-

Page 5SKU 66508 For technical questions, please call 1-800-444-3353
tances can result in the cable twisting
or kinking.
For safest operation, the Drain15.
Cleaner should be run only by the
operator controlling the Foot Pedal
and Cable.
Reversing the Motor direction should16.
only be done when pulling the Cable
out of the pipe, or off an obstruction.
Trying to push the Cable down the pipe
while in reverse operation can result in
Cable damage. Make sure Drum has
stopped turning before changing the
Motor Direction Switch (5).
Keep hands away from the rotating17.
Drum (38a) and Feed Pipe (42a). Do
not reach into Drum unless the Drain
Clean power cord is unplugged.
Avoid contact to eyes and skin of18.
any drain cleaners that may have
been used to unclog the drain pre-
vious to using the Drain Cleaner.
These chemicals can burn the eyes
and skin. They may also damage the
Cable.
Be aware of possible damage to19.
drain lines that may result from the
discovery of roots and other ob-
stacles.
20. WARNING! People with pacemak-
ers should consult their physician(s)
before using this product. Electro-
magnetic elds in close proximity to a
heart pacemaker could cause interfer-
ence to or failure of the pacemaker.
In addition, people with pacemakers
should adhere to the following:
• Avoid operating power tools alone.
• Properly maintain and inspect all tools
before use to avoid electrical shock.
GROUNDING
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM INCORRECT
GROUNDING WIRE
CONNECTION:
Check with a qualied
electrician if you are in doubt
as to whether the outlet is
properly grounded. Do not
modify the power cord plug
provided with the tool. Never
remove the grounding prong
from the plug. Do not use the
tool if the power cord or plug is
damaged. If damaged, have it
repaired by a service facility
before use. If the plug will not
t the outlet, have a proper
outlet installed by a qualied
electrician.
Grounded Tools: Tools with Three
Prong Plugs
Tools marked with “Grounding Re-1.
quired” have a three wire cord and three
prong grounding plug. The plug must
be connected to a properly grounded
outlet. If the tool should electrically
malfunction or break down, grounding
provides a low resistance path to carry
electricity away from the user, reducing
the risk of electric shock. (See 3-Prong
Plug and Outlet.)

Page 6SKU 66508 For technical questions, please call 1-800-444-3353
The grounding prong in the plug is con-2.
nected through the green wire inside
the cord to the grounding system in the
tool. The green wire in the cord must
be the only wire connected to the tool’s
grounding system and must never be
attached to an electrically “live” termi-
nal. (See 3-Prong Plug and Outlet.)
The tool must be plugged into an ap-3.
propriate outlet, properly installed and
grounded in accordance with all codes
and ordinances. The plug and outlet
should look like those in the preceding
illustration. (See 3-Prong Plug and
Outlet.)
Double Insulated Tools: Tools with
Two Prong Plugs
Tools marked “Double Insulated” do4.
not require grounding. They have a
special double insulation system which
satises OSHA requirements and com-
plies with the applicable standards of
Underwriters Laboratories, Inc., the
Canadian Standard Association, and
the National Electrical Code. (See
Outlets for 2-Prong Plug.)
Double insulated tools may be used in5.
either of the 120 volt outlets shown in
the preceding illustration. (See Outlets
for 2-Prong Plug.)
6.
Ground Fault Circuit Interrupter
(GFCI)
A Ground Fault Circuit Interrupter
(GFCI) is manufactured within the Power Cord
(15), about midway, due to the risk of electrical
shock when operating the Drain Cleaner, and
its proximity to water and ground. The GFCI
provides additional protection from the risk of
electrical shock.
Make sure that the Motor Direction1.
Switch is in the Off position before plug-
ging in the Drain Cleaner.
Plug the GFCI Power Plug into a2.
grounded, 120 VAC electrical outlet.
Press the TEST button, then press the3.
RESET button. The GFCI indicator
should show Red in the window.
If the indicator is not red, try plugging
the Power Cord into a different electri-
cal outlet and repeat the steps. If the
same results occur, have the Power
Cord inspected by a licensed electri-
cian. Repair or replacement must be
completed by a licensed electrician.
Note: The Power Cord is not GFCI protected
from the GFCI unit to the 3-prong plug
in the electrical outlet.
EXTENSION CORDS
Grounded1. tools require a three wire
extension cord. Double Insulated
tools can use either a two or three wire
extension cord.
As the distance from the supply outlet2.
increases, you must use a heavier
gauge extension cord. Using exten-
sion cords with inadequately sized
wire causes a serious drop in voltage,

Page 7SKU 66508 For technical questions, please call 1-800-444-3353
resulting in loss of power and possible
tool damage.
(See Figure C, next page.)
The smaller the gauge number of the3.
wire, the greater the capacity of the
cord. For example, a 14 gauge cord
can carry a higher current than a 16
gauge cord.
(See Figure C.)
When using more than one exten-4.
sion cord to make up the total length,
make sure each cord contains at least
the minimum wire size required. (See
Figure C.)
If you are using one extension cord for5.
more than one tool, add the nameplate
amperes and use the sum to determine
the required minimum cord size. (See
Figure C.)
If you are using an extension cord out-6.
doors, make sure it is marked with the
sufx “W-A” (“W” in Canada) to indicate
it is acceptable for outdoor use.
Make sure your extension cord is7.
properly wired and in good electrical
condition. Always replace a damaged
extension cord or have it repaired by a
qualied electrician before using it.
Protect your extension cords from8.
sharp objects, excessive heat, and
damp or wet areas.
RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS*
(120/240 VOLT)
NAMEPLATE
AMPERES
(at full load)
EXTENSION CORD
LENGTH
25’ 50’ 75’
100’ 150’
0 – 2.0 18 18 18 18 16
2.1 – 3.4 18 18 18 16 14
3.5 – 5.0 18 18 16 14 12
5.1 – 7.0 18 16 14 12 12
7.1 – 12.0 18 14 12 10 -
12.1 – 16.0 14 12 10 - -
16.1 – 20.0 12 10 - - -
TABLE A
* Based on limiting the line
voltage drop to ve volts at
150% of the rated amperes.
Symbology
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
V~ Volts Alternating Current
AAmperes
n0xxxx/min. No Load Revolutions per Minute
(RPM)
UNPACKING
When unpacking, check to make sure
that all the parts are included. Refer to the
Assembly section, and the Assembly Drawing
and Parts List at the end of this manual. If any
parts are missing or broken, please call Harbor
Freight Tools at the number on the cover of
this manual as soon as possible.

Page 8SKU 66508 For technical questions, please call 1-800-444-3353
OPERATING INSTRUCTIONS
The following sections describe the operational components and controls of the Drain
Cleaner, as well as its operation and application.
Operational Components and Controls
Warning: Do not allow your hands, clothing or any other object to become caught
between the belt and the drum. Serious personal injury could result.
The main operational components of the Drain Cleaner tool are the Motor (7), with its1.
Motor Direction Switch (5), Pneumatic Foot Pedal (14A) and the Cable Feed Unit (44a)
with its direction controller.
The2. Motor (7) is connected to the Drum (38a) using a Drive Belt (2). When turned on,
the Motor turns the Drum, which causes the Spring Cable (39a) to rotate. Rotation of
the Spring Cable helps it to move through bends or turns in the drain line, and also to
drill through soft clogs, or entangle harder clogs for removal. (See photo below, left.)
The3. Motor Direction Switch (5) has NORMAL, UNBIND and OFF settings. NORMAL
will set the Spring Cable to rotate clockwise (viewed from machine rear), causing it to
bore into or entangle any obstruction. UNBIND will cause the Spring Cable to rotate
counterclockwise (viewed from machine rear), causing it to unwind from any obstruc-
tion. (See photo below, right.)
Motor (7), Drum (38a) and Drive Belt (2). Motor Direction Switch (5)
The Motor is controlled by a4. Pneumatic Foot Pedal (14A). Whenever the Motor Direc-
tion Switch (5) is in the NORMAL or UNBIND position, stepping on the Pneumatic Foot
Pedal (14A) will cause the motor to run and the Drum (38a) to turn. NOTE: The Foot
Pedal is a Pneumatic Switch. (See photo on page 10, top-left.)
The rotating Drum causes the Spring Cable (39a) to rotate along its axis like a drill. The5.
Direction Lever (44-16) on the Cable Feed Unit (44a) controls the motion of the Spring
Cable (39a) forward into the drain or back into the Drum (38a). The feed tension is
controlled by the Star Knob (44-13). See photo on page 10, top-right. The Star Knob
(44-13) must be loosened before changing the position of the Direction Lever (44-16),
and then retightened after the adjustment.
REV 09b

Page 9SKU 66508 For technical questions, please call 1-800-444-3353
Pneumatic Foot Pedal (14A): Press On, release Off
Direction Lever (44-16): Pull Up: forward direction,
Center: neutral; Push down: slow reverse, Fast
reverse direction.
Attaching Guide Spring (48)
While following these procedures, it may be helpful to refer to the Parts List andAssembly
Drawings located at the end of this manual.
Unplug the Power Cord from the electrical outlet.1.
Pull up on the Direction Lever (44-16) to place it in the NEUTRAL position.2.
Loosen Tension Knob (44-13) and pull out three feet of cable from the Drum (38a).3.
Slide the Guide Spring (48) over the cable and onto the Adapter (44-3) on the end of4.
the Cable Feed Unit.
Pull out and align the Spring Loaded Pin (46) on the Guide Spring, with the hole in the5.
Adapter (44-3).
Retighten Tension Knob (44-13).6.
Select and Attach Proper Cutting Tool
There are four Cutting Tools included with the Drain Cleaner. Select the appropriate
tool for the cleaning job and attach to Cable (39a). Each is described in the table below.
Cutter Tool Application
Arrow Cutting Head (59) Starting tool for cutting and scraping
Auger Bulb (60) Starting tool to remove loose objects
1-1/2” U-Cutter (61) Finishing tool for grease stoppages and scraping pipe walls
1-1/4” Side Cutter Blade (62) Starting / Finishing tool to remove loose objects and scraping pipe walls
Select the desired cutter tool and insert it into the female connector located at the1.
end of the Cable (39a). It is recommended to start with the Arrow Cutting Head (59)
or Auger Bulb (60). Once the drainpipe is opened, then use the 1-1/2 U-Cutter (61)
or 1-1/4” Side Cutter Blade (62) to scrape the inside wall of the drain pipe, for a more
Star Knob
(44-13)
REV 09b

Page 10SKU 66508 For technical questions, please call 1-800-444-3353
thorough cleaning job. Secure the cutter tool to Cable (39a) with Phillips Screw (78)
and Spring Washer (77).
Drain Cleaning Operation
CAUTION: DO NOT USE THIS DRAIN CLEANER ON DRAIN LINES SMALLER THAN
TWO INCHES. DAMAGE MAY OCCUR TO EQUIPMENT OR PIPES.
Place the Drain Cleaner within two feet of the drain pipe inlet.1.
Pull Cable (39a) from the Drum (38a) and begin feeding it into the drain pipe inlet as2.
far as it will go manually.
Verify that the Motor Direction Switch (5) is in the Off position, then plug the Power 3.
Cord (15) into an electrical outlet. Press the Reset button on the GFCI.
Loosen the Star Knob (44-13) by turning it counterclockwise until it is no longer4.
pressing against the cable. See photo on page 10.
Pull the Direction Lever (44-16) up (FORWARD) to feed Cable out of the Drum. 5.
Pushing the Direction Lever down (REVERSE) will retract the Cable back into the
Drum. When the lever is in the middle (NEUTRAL) position, the Cable will spin in
place.
Move the Motor Direction Switch (5) to the Forward position.6. CAUTION: Do not
force the Cable. Let the cutter do the work.
Turn (clockwise) the Star Knob (44-13), at the top of the Cable Feed Unit, until the7.
feed roller touches the Cable, then one quarter additional turn. Do not overtighten,
excessive cable wear will occur. See photo on page 10.
Wearing a leather glove, place your hand on the Guide Tube or Cable, press the8.
Pneumatic Foot Pedal (14A) to start the forward Cable movement. Feed the Cable
into the drain pipe inlet with a rm and even pressure against any resistance. Adjust
the feeding rate to the resistance met. Do not force the Cable. Let the cutter do the
work. Run hot water down the drain pipe during and after the removal of the stop-
page to wash away debris.
WARNING! If the drain cleaner stops suddenly, switch it off immediately. Allow motor9.
to cool off completely before restarting and stay clear of cable when turning motor
back on.
After the drain pipe has been opened, return the cable to the Drum. To do that:10.
Place the Direction Lever (44-16) in the UNBIND direction. Press the Motor Direc-
tion Switch (5) to the NORMAL position. Press on the Pneumatic Foot Pedal (14A) to
recoil Cable. When the cutter head is near the drain pipe inlet, release Foot Pedal to
stop Drum rotation. NOTE: If necessary, replace the cutter tool with the U-Cutter or
Side Cutter, and reenter the drain pipe to clean the pipe walls.
Caution: Avoid damage to Cable or cutting tool. Do not use the Motor Direction Switch11.
(5) in the Reverse position to pull the Cable out of the drain pipe. Always leave the
REV 09b

Page 11SKU 66508 For technical questions, please call 1-800-444-3353
Switch (5) in the NORMAL position, whether feeding the Cable into the drain pipe, or
pulling it out. Use Reverse position only to release the Cable if it should become caught
in the drain pipe line, and only for a few seconds.
When the job is complete, unplug the Power Cord from the electrical outlet and coil12.
it. Store the Drain Cleaner and cutter tools in clean and dry location.
OPERATING TIPS
When Cable starts
to bend, twist or
whip.
Too much slack in Cable or cutter tool caught in stoppage. Re-
lease Foot Pedal, press Direction Lever down to temporarily re-
verse cable feed direction, and re-wind to relieve twist on Cable.
Pull Direction Lever up (FORWARD) to continue.
When Cable has
trouble getting
around tight bends
in drain pipe.
Press Motor Direction Switch (5) to Reverse while applying
steady pressure to Cable. Keep in mind that this will reverse auto
feed operation as well. Do for only a few seconds to pass bend.
More time could cause tangling or kinks in the Drum. If problem
persists, Cable is too large for pipe. Switch to a drain cleaner with
a smaller cable.
When Cable reach-
es clog in drain pipe.
Do not force Cable through stoppage. Press Direction Lever to
neutral position. Allow Cable to progress forward slowly, chew-
ing stoppage. Slow forward movement reduces stress on Cable,
while cleaning better. Try back and forth Cable movement, using
the Direction Lever (44-16).
TROUBLESHOOTING
Problem Probable Cause(s) Solution(s)
Motor cuts off
during use.
The motor may have been shut
off by it’s internal thermal protec-
tion switch, or auto reset breaker.
Turn motor off. Allow motor to cool
off completely before restarting and
stay clear of cable when turning
motor back on.
Cable kinks,
twists, or breaks.
Too much force on the cable.1.
Too much slack between Drain2.
Cleaner and drainpipe inlet.
Cable used is wrong size for3.
drain pipe.
Cable exposed to acid.4.
Cable worn out.5.
Do not force cable. Let cutter1.
tool do the work.
Move Drain Cleaner to within2.
two feet of drainpipe inlet.
Change cable size.3.
Clean and oil cable regularly.4.
Replace cable5.
Cable tangles in
drum.
Too much force on the cable.1.
Motor running in reverse.2.
Distributor tube frozen.3.
Do not force cable. Let cutter1.
tool do the work.
Retract Cable with the Motor Di-2.
rection Switch (5) in the Forward
position.
Lubricate distributor tube bear-3.
ings.

Page 12SKU 66508 For technical questions, please call 1-800-444-3353
TROUBLESHOOTING
Problem Probable Cause(s) Solution(s)
Power Cord GFCI trips when
unit is plugged in or when
Foot Pedal is pressed.
Motor Direction Switch1.
(5) defective.
Frayed Power Cord.2.
Short circuit in Motor.3.
Excess moisture touch-4.
ing Power Cord or Drain
Cleaner.
Faulty GFCI unit.5.
Repair or replace Motor1.
Direction Switch.
Repair or replace Power2.
Cord.
Have Motor repaired by a3.
qualied technician; Re-
place Motor.
Remove moisture.4.
Replace Power Cord with5.
GFCI.
Motor does not operate. Pneumatic Foot Pedal
may have a leak.
Check for leaks in air line lead-
ing from Foot Pedal. Check for
tears and holes in Foot Pedal.
Replace if needed.
The “Unbind/Normal” Switch
does not work.
The centrifugal switch re-
quires the motor to come
to a complete stop before
it will allow the direction of
the motor to be changed.
Move the “Unbind/Normal”
Switch to the “Off” position and
allow the motor to stop before
changing from “Normal to Un-
bind” or visa versa.
The Foot Pedal sticks. Overloading of the motor
may cause the Foot Pedal
to stick.
Press the Foot Pedal several
times to release it.
Cable does not feed when
Foot Pedal is pressed.
Cable tangled in Drum.1.
Feed tension incorrect.2.
Feed roller frozen.3.
Cable worn out.4.
Do not run Motor in reverse.1.
Unplug Drain Cleaner and
manually pull cable out until
tangle is cleared.
Adjust feed tension Star2.
Knob (44-13). If Knob is too
loose, cable will slip. If too
tight, rollers will wear pre-
maturely.
Clean and lubricated feed3.
rollers. Replace worn roll-
ers.
When cable coils wear at, 4.
cable should be replaced.

Page 13SKU 66508 For technical questions, please call 1-800-444-3353
INSPECTION, MAINTENANCE, AND CLEANING
WARNING! Make sure the Power Switch of the Drain Cleaner is in its “OFF”
position and that the tool is unplugged from its electrical outlet before performing any
inspection, maintenance, or cleaning procedures.
General
Before each use,1. inspect the general condition of the Drain Cleaner. Check for loose
screws, misalignment or binding of moving parts, cracked or broken parts, damaged
electrical wiring, and any other condition that may affect its safe operation. If abnormal
noise or vibration occurs, have the problem corrected before further use. Do not use
damaged equipment.
Periodically recheck all nuts, bolts, and screws for tightness.2.
After each use, clean the Drain Cleaner components with a wet, clean cloth. Wipe dry3.
when clean.
Always keep Cable (39a) well oiled by pouring oil directly into the Drum (38a). Then4.
push the Motor Direction Switch (5) to the NORMAL position. The Drum will rotate. Do
this until the entire Cable is lubricated. Lubricate all other moving parts adequately to
protect against corrosion, sand, grit, and other abrasive material.
Store unit in a clean and dry location. Cover unit with a cloth cover.5.
The cable includes a Cable Stop (80) to prevent it from being overextended. Loosen6.
the Bolts (81), and remove Stop if removing the cable. When re-installing Cable, reat-
tach the Stop inside the drum when there are about two full turns of cable still in the
drum.
Auto Feed Maintenance
Keep the auto feed mechanism free of excessive soil and grit. It is recommended that
it be ushed with fresh water, followed by a light oiling of the moving parts. No disassembly
is normally required. Failure to feed during operation can usually be traced to the build up of
soil and grit. Over time, dirt can harden enough to stop roller rotation. Flushing with water,
followed by liberal oiling can usually restore function. If disassembly is required, proceed
as follows:
Remove the two bolts that hold the Front Cap (44-19A) and internal roller to the Case1.
(44-11A).
Slide the front Cap out of the Case and inspect and clean the roller as described2.
above.
Remove the four bolts that hold the End Cap (44-7A) and Guide Rollers (44-9) to the3.
Case (44-11A).
Slide the End Cap out of the Case and inspect and clean the three guide rollers as4.
described above.

Page 14SKU 66508 For technical questions, please call 1-800-444-3353
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.
While the Case is open, thoroughly clean and oil all parts and then reassemble in5.
reverse order.
Guide Roller Replacement
Guide Rollers (44-9) due to excessive use may be damaged to a point of failure and
need replacement. Replace all three Guide Rollers at the same time.
Tangled Cable
If the Cable loops over itself in the Drum, it will not feed properly. With the motor stopped
and cord unplugged, remove and reload the Cable by hand to restore proper functioning. If
the Cable kinks, it is evidence of abuse and results from the use of too much pressure when
drain cleaning, or use of the wrong size Cable for the drain pipe being cleaned. Do not force
the Cable during use, let the cutter tool do the work.
Removing a Stuck Cable in the Drain Pipe
If the cable gets caught in the drain pipe move the Motor Direction Switch (5) to the Off 1.
position. Then, once the drum has stopped turning, move the Motor Direction Switch
(5) to the Reverse position to free the Cable.
If using the Power Cable Feed, putting the Motor in reverse will cause the feed Direc-2.
tion Lever (44-16) to operate opposite of normal.
Press the Pneumatic Foot Pedal (14A) while pulling on the Cable.3.
After the Cable is loose, move the Motor Direction Switch (5) back to the Forward4.
position.
Caution: Running the Motor in reverse for more than a few seconds at a time can
cause the Cable to tangle in the Drum.
REV 09b

Page 15SKU 66508 For technical questions, please call 1-800-444-3353
MAIN UNIT PARTS LIST
Part Description Qty
1 Protect Shield 1
2 Belt 1
3 Belt Wheel 1
4 Bolt M6 x 10 1
5 Motor Direction Switch 1
6 Lock Nut M6 1
7 Motor 1
8 Lock Nut M10 4
9A Motor Holder 1
10 Spring 4
14A Pnuematic Foot Switch 1
15 GFCI 1
16A U Handle 1
17 Star Knob M10 x 35 2
18A Frame 1
20 Cotter Pin Ø3.2 x 25 2
21 Pipe Cap 2
22 Wheel 2
23 Washer Ø14 4
25 Hex Bolt M10 x 20 2
26 Star Nut M10 1
27 Cap Nut M6 2
28 Rubber Foot 2
29 Washer Ø6 4
30 Phillips Bolt M6 x 40 2
31 Bolt M10 x 50 1
32 Washer Ø10 14
33A Axle for Drum 1
35 Washer #1 1
36 Lock Nut M8 5
37A Drum Hub 1
38A Drum 1
39A Spring Cable 1
41 Hex Bolt M8 x 20 5
Part Description Qty
42A Cable Guide 1
44A Feed Unit 1
45 Retaining Ring 2
46 Pin 1
47 Pin Spring 1
48 Guide Spring 1
54 Spring Washer Ø10 2
55 Notched Washer 1
56 Inner Hex Bolt M8 x 8 2
57 Right Angle Guide 1
58 Cross-Head Bolt M5 x 10 1
59 Arrow Head Cutter 1
60 Bulb Auger 1
61 1-1/2” U-Cutter 1
62 1-1/4” Side Cutter Blade 2
63 Hex Bolt M10 x 70 4
64 Flat Washer 6 1
65 Block 4
66 Hinge A 2
67 Inner Hex Bolt M4 x 25 4
68 Hinge B 2
69 Tray 1
70 Washer #2 2
71 Cross-head Bolt M6 x 20 4
72 Sleeve 2
73 Wheel Shaft Cap 2
74 Waveform Washer 19 1
75 Washer 1
76 Spring Washer 5 1
77 Spring Washer 6 5
78 Phillips Screw M6X16 1
79 Washer 1
80 Cable Stop 1
81 Inner Hex Screw M4X12 4
NOTE: Some parts are listed and shown for illustration purposes only and are not available individually as re-
placement parts.
REV 09b

Page 16SKU 66508 For technical questions, please call 1-800-444-3353
MAIN UNIT ASSEMBLY DRAWING

Page 17SKU 66508 For technical questions, please call 1-800-444-3353
PARTS LIST FOR SUBASSEMBLY NO. 44A (FEED UNIT)
Part Description Q’ty
44-1 Base 1
44-2 Inner Hex Bolt M6x14 6
44-3 Adapter 1
44-4A Axle for Guide Roller 1
44-5A Guide Screw 1
44-6 Cable Sleeve 1
44-7A End Cap 1
44-8A Screw 4
44-9 Guide Roller 3
44-10AScrew 2
44-11A Case 1
44-12ASide Cap 1
44-13 Star Knob M12 1
44-14AShaft 1
44-15 Shaft Sleeve 1
Part Description Q’ty
44-16 Direction Lever 1
44-17 Handle Cap 1
44-18 Spring 1
44-19AFront Cap 1
44-20 Bolt M6x16 2
44-21 Inner Hex Bolt M6x18 4
44-22 Cap 1
44-23 Small Spring 1
44-24 Nylon Sleeve 2
44-25 Steel Ball Ø10 1
44-26 Spring Washer Ø6 6
44-29 O-ring 8
44-30 Washer Ø8 2
44-31 Pin 3X10 1
44-32 Flat Washer 6 6
SUBASSEMBLY NO. 44A (FEED UNIT)

Page 18SKU 66508 For technical questions, please call 1-800-444-3353
LIMITED 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 product 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, in-
juries 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 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 complaint
must accompany the merchandise. 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 • [phone]