U.S. General 66786 Installation manual

20 GALLON PORTABLE OIL
LIFT DRAIN
66786
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 66786 For technical questions, please call 1-800-444-3353. Page 2
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
To reduce the risks of electrica.
shock, re, and injury to persons,
read all the instructions before us-
ing the tool.
Work area
Keep the work area clean and wella.
lighted. Cluttered benches and dark
areas increase the risks of electric
shock, re, and injury to persons.
Do not operate the tool in explo-b.
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.
Keep bystanders, children, andc.
visitors away while operating the

SKU 66786 For technical questions, please call 1-800-444-3353. Page 3
tool. Distractions are able to result in
the loss of control of the tool.
Personal safety
Stay alert. Watch what you are do-a.
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.
Dress properly. Do not wear looseb.
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.
Do not overreach. Keep properc.
footing and balance at all times.
Proper footing and balance enables
better control of the tool in unexpect-
ed situations.
d. 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.
e. Always wear eye protec-
tion. Wear ANSI-ap-
proved safety goggles.
f. 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
Do not force the tool.a. 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.
Disconnect the tool from the airb.
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.
Store the tool when it is idle out ofc.
reach of children and other un-
trained persons. A tool is dangerous
in the hands of untrained users.
Maintain the tool with care.d. A prop-
erly maintained tool will work more
effectively.
Check for misalignment or bind-e.
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.
Use only accessories that aref.
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.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 4
Service
Tool service must be performeda.
only by qualied repair personnel.
When servicing a tool, use onlyb.
identical replacement parts. Use
only authorized parts.
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.
WARNING! Do not exceed 10 PSIb.
working air pressure during use.
Never use oxygen, carbon dioxide,c.
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
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
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
eye protection.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSH-
approved dust mask/respirator.
WARNING marking concerning Risk
of Explosion.
Specic Safety Instructions
The warnings and precautions dis-1.
cussed in this manual cannot cover
all possible conditions and situations
that may occur. It must be under-
stood by the operator that common
sense and caution are factors which
cannot be built into this product, but
must be supplied by the operator.
Do not exceed the product’s working2.
pressure of 10 PSI.
Only use on a at surface capable of 3.
supporting the Portable Oil Lift and its
maximum load of 20 gallons.
Always secure the Wheels and Cast-4.
ers in place while operating Oil Lift.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 5
Know and obey city and state laws5.
for proper disposal of oil. Dispose of
oil properly in accordance with all lo-
cal laws and regulations.
WARNING!6. The Oil Lift is to be used
only for transporting oil. Do not use
to transport any other liquid.
Do not leave Oil Lift unattended while7.
operating or while evacuating oil.
Do not use this equipment near open8.
ame or heat sources.
Always raise Bowl (1) and close Ball9.
Valve (6) before evacuating oil. Nev-
er attempt to pressurize the Tank with
the Ball Valve open.
If the Safety Valve ever relieves any10.
air pressure from the Tank, remove
the unit from service immediately and
contact a qualied service technician.
If used oil does not evacuate the11.
Tank (23) upon pressurization, check
to make sure the Ball Valve (6) is fully
closed with the Handle (10) in the
horizontal position. If this does not
correct the problem, remove the unit
from service immediately and con-
tact a qualied service technician for
repair.
WARNING: The brass components12.
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.)
Only use with accessories rated to13.
handle the forces exerted by this tool
during operation. Other accessories
not designed for the forces gener-
ated may break and forcefully launch
pieces.
Attach all accessories properly to the14.
tool before connecting the air sup-
ply. A loose accessory may detach or
break during operation.
Obey the manual for the air compres-15.
sor used to power this tool.
Install an in-line shutoff valve to allow16.
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
Do not lay the tool down until it has17.
come to a complete stop. Moving
parts can grab the surface and pull
the tool out of your control.
Do not smoke during use of this prod-18.
uct.
Grip tool as lightly as possible (while19.
still keeping safe control of it). Let
the tool do the work.
If any abnormal vibration occurs, stop20.
use immediately.
SAVE THESE
INSTRUCTIONS.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 6
FUNCTIONAL DESCRIPTION
Specications
Capacity 20 Gallons
Operating Air Pressure 10 PSI
Air Inlet 1/4” -18 NPT
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.
Assembly
Be sure to assemble Oil Lift Drain1.
on at, level surface able to support
weight of tool.
To begin assembly, slide one Fixed2.
Wheel (18) onto each end of the axle
of the Tank (23). Lock Wheels into
place using Washers (17) and Retain-
ing Rings (16). See Assembly Dia-
gram on page 12.
If the Casters are not already at-3.
tached to the Tank, fasten one Swivel
Caster (22) to each plate located
on the base of the Oil Lift. Slide on
Spring Washer (20), Washer (21),
and then thread Locking Nut (19)
onto Caster stem to secure Swivel
Casters in place. See Assembly
Diagram on page 12.
Insert the Handle (10) into the slot on4.
the upper side of the Tank (23). Fas-
ten in place using the Bolts (11). See
Assembly Diagram on page 12.
Insert the Bushing (4) into the Nut (5)5.
and thread the Nut into the Ball Valve
until secure.
When tightening, make sure the Lock6.
Knob (3) is parallel with the handle of
the Gate Valve (6).
Thread the Bowl (1) into the Drain7.
Tube (2) until fastened securely.
Insert the Drain Tube, with the Bowl8.
fastened to the other end, into the
Bushing. Select the required height
and lock Drain Tube in place using
the Locking Knob (3). See Assem-
bly Diagram on page 12.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 7
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
Incorporate a lter, regulator with 1.
pressure gauge, in-line shutoff valve,
and quick coupler for best service,
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.
Attach an air hose to the compres-2.
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.
The air hose must be long enough3.
to reach the work area with enough
extra length to allow free movement
while working.
Close the in-line safety valve be-4.
tween the compressor and the tool.
Turn on the air compressor according5.
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
Adjust the air compressor’s output 6.
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.
Inspect the air connections for leaks.7.
Repair any leaks found.
If the tool will not be used at this8.
time, turn off and detach the air sup-
ply, safely discharge any residual air

SKU 66786 For technical questions, please call 1-800-444-3353. Page 8
pressure, and release the throttle
and/or turn the switch to its off posi-
tion 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.
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: Close the Ball
Valve, detach the air supply,
safely discharge any residual
air pressure in the tool 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.
Work Piece and Work Area Set Up
Designate a work area that is clean1.
and well-lit. The work area must not
allow access by children or pets to
prevent injury and distraction.
Route the air hose along a safe route2.
to reach the work area without creat-
ing a tripping hazard or exposing the
air hose to possible damage. The air
hose must be long enough to reach
the work area with enough extra
length to allow free movement while
working.
There must not be hazardous ob-3.
jects (such as utility lines or foreign
objects) nearby that will present a
hazard while working.
General Operating Instructions
Open the Ball Valve (6) by turning1.
Valve’s handle to a vertical position.
Unscrew Lock Knob (3) and readjust
Bowl (1) height.
Once the Bowl (1) has been set at2.
the required height and locked into
place, remove oil pain plug to drain
the oil.
WARNING!3. Do not ll the Tank be-
yond its 20-gallon capacity. The
discharge hose is clear, so the oil in
the tube will indicate the reservoir

SKU 66786 For technical questions, please call 1-800-444-3353. Page 9
ll level. When oil level reaches the
Hoop (14), drain the oil.
Back off Lock Knob (3) and raise4.
Drain Tube to above Gate Valve “ball”
and tighten Lock Knob. Rotate Ball
Valve handle to horizontal position.
Place Nozzle (12) securely in a used5.
oil collection receptacle. WARNING!
Be sure to follow all local regulations
regarding proper used oil collection.
Connect the compressor’s air supply6.
hose to the Air Inlet (9). Turn on the
air compressor, making sure it is set
between 7-10 PSI.
WARNING! Do not leave Oil Lift7.
unattended while it is in the evacu-
ating oil process.
Please note:8. The Oil Lift has a
Safety Valve (8) that can be pulled to
rapidly release pressure in the Tank
in case of an emergency.
Close Regulator (7) by pulling out the9.
knob and rotating counterclockwise.
Pull Regulator’s cap out and slowly
turn it in a clockwise direction while
observing the Pressure Gauge. Do
not exceed 10 PSI.
Once oil is no longer being dis-10.
charged from the Nozzle, turn off air
compressor. Disconnect compressor
air supply hose from the Air Inlet.
Before transporting the Oil Lift, open11.
the Lock Knob (3) and lower all the
way. Then lock Drain Tube in place
by turning the Lock Knob.
Use the Handle (10) when moving12.
the Oil Lift from one location to an-
other. Always grasp the Handle with
two hands and only transport Oil Lift
along at, level surfaces able to with-
stand the weight of the Oil Lift.
If the tool requires more force to13.
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 10 PSI.
Please Note:14. Oil discharge rate will
be slightly affected by the outside
temperature.
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: Turn off tool,
detach air supply, safely
discharge any residual air
pressure in tool before
performing any inspection,
maintenance, or cleaning.
TO PREVENT SERIOUS
INJURY FROM TOOL
FAILURE: Do not use
damaged equipment. If
abnormal noise, vibration, or
leaking air or oil occurs, have
the problem corrected before
further use.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 10
TO PREVENT EXPLOSION:
Lubricate tool only with
specied lubricants.
Lubricate air inlet using only
pneumatic tool oil. Lubricate
internal mechanism using
only white lithium grease.
Other lubricants may damage
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.
Once a year after discharging con-1.
tents of the Tank, remove the Drain
Plug (24) to drain accumulated
sludge. To reattach the Plug, wrap
three turns of thread sealing tape
(not included) on the Plug thread
and secure in place. Do not over-
tighten.
Keep the outside of the Tank free of2.
oil or grease. Use only a mild soap
and damp cloth when cleaning. Do
not use ammable or combustible
solvents.
Before and during each use, inspect3.
the Hose (13) for damage. Do not
allowed the used oil to surpass the
Tank’s 20-gallon capacity.
After use, store in a dry, secure area4.
out of reach of children.
Troubleshooting
Problem Possible Causes Likely Solutions
Decreased output. Not enough air pressure and/1.
or air ow.
Blockage of hose.2.
Accumulated sludge.3.
Check for loose connections and make sure1.
that air supply is providing enough air ow
(CFM) at required pressure (PSI) to the
tool’s air inlet. Do not exceed maximum air
pressure.
Gently blow air from Nozzle into Tube.2.
After draining the oil, remove Plug and3.
evacuated sludge.
Housing heats
during use.
Incorrect lubrication or not1.
enough lubrication.
Worn parts.2.
Lubricate using air tool oil and grease1.
according to directions.
Have qualied technician inspect internal 2.
mechanism and replace parts as needed.
Severe air
leakage.
(Slight air leakage
is normal,
especially on older
tools.)
Cross-threaded housing1.
components.
Loose housing.2.
Damaged valve or housing.3.
Dirty, worn or damaged valve.4.
Check for incorrect alignment and uneven1.
gaps. If cross-threaded, disassemble and
replace damaged parts before use.
Tighten housing assembly. If housing cannot2.
tighten properly, internal parts may be
misaligned.
Replace damaged components.3.
Clean or replace valve assembly.4.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect air supply before service.

SKU 66786 For technical questions, please call 1-800-444-3353. Page 11
Part Description Q’ty
1 Bowl 1
2 Drain Tube 1
3 Lock Knob 1
4 Bushing 1
5 Nut 1
6 Ball Valve 1
7 Regulator (With Gauge) 1
8 Safety Valve 1
9 Air Inlet Connector 1
10 Handle 1
11 Bolt 1
12 Nozzle 1
Part Description Q’ty
13 Hose 1
14 Hoop 1
15 Locking Nut 1
16 Retaining Ring 2
17 Washer 2
18 6” Fixed Wheel 2
19 Locking Nut 2
20 Spring Washer 2
21 Washer 2
22 3” Swivel Caster 2
23 Tank 1
24 Drain Plug 1
PARTS LIST
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.
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 66786 For technical questions, please call 1-800-444-3353. Page 12
ASSEMBLY DIAGRAM
24

SKU 66786 For technical questions, please call 1-800-444-3353. Page 13
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 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]