Central Hydraulics 66593 Installation manual

10-TON LONG FRAME JACK
Model 66593
SET UP AND OPERATING INSTRUCTIONS
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described herein.
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.
For technical questions or replacement parts, please call 1-800-444-3353.

Page 2SKU 66593 For technical questions, please call 1-800-444-3353.
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, 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.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling,
and all other information
provided 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.
General Safety Rules
WARNING! Read all instructions.
Failure to follow all instructions
listed below may result in
serious injury. The term “tool”
in all of the warnings listed below
refers to your Jack.
SAVE THESE INSTRUCTIONS
Work area safety1.
a. Keep work area clean and well
lit. Cluttered or dark areas invite
accidents.
b. Do not operate tools in explosive
atmospheres, such as in the
presence of ammable liquids,
gases or dust. Air and hydraulic
tools create sparks which may ignite
the dust or fumes.
c. Keep children and bystanders
away while operating this tool.
Distractions can cause you to lose
control.
Personal safety3.
Stay alert, watch what you are doinga.
and use common sense when oper-
ating this tool. Do not use this tool
while you are tired or under the inu-
ence of drugs, alcohol or medication.
A moment of inattention while oper-
ating this tool may result in serious
personal injury.
DANGER
WARNING
CAUTION
Notice
CAUTION

Page 3SKU 66593 For technical questions, please call 1-800-444-3353.
Use safety equipment. Always wear b.
ANSI-approved safety impact gog-
gles and heavy-duty work gloves.
Safety equipment such as non-skid
safety shoes, hard hat, or hearing
protection used for appropriate con-
ditions will reduce personal injuries.
Avoid accidental lowering whenc.
under load. Ensure that the Handle
Lever (1.4) is secured at Position A.
(See Fig. 2.)
Stay out from under loads beingd.
lifted, even loads held by jack stands
if possible.
Do not overreach. Keep proper foot-e.
ing and balance at all times. This
reduces the chance of falling or trip-
ping.
Dress properly. Do not wear loosef.
clothing or jewelry. Keep your hair,
clothing and gloves away from mov-
ing parts.
Tool use and care
Do not force the tool. Use the cor-a.
rect tool for your application. The
correct tool will do the job better
and safer at the rate for which it was
designed.
Store idle tools out of the reach ofb.
children and do not allow people un-
familiar with the tool or these instruc-
tions to operate this tool. Tools are
dangerous in the hands of untrained
users.
Maintain this tool. Check for mis-c.
alignment or binding of moving parts,
breakage of parts and any other
condition that may affect the tool’s
operation. If damaged, have the tool
repaired at a qualied shop before
use. Many accidents are caused by
poorly maintained tools.
Use the tool and its accessories ind.
accordance with these instructions
and in the manner intended for this
particular type of tool, taking into ac-
count the working conditions, loca-
tion and the work to be performed.
Use of this tool for operations differ-
ent from those intended could result
in a hazardous situation.
The wheels will need periodic lubri-e.
cation by greasing the Zerk Fittings
provided at each wheel using a
grease gun. (Not supplied.)
Grease guns can be obtained from•
Harbor Freight Tools.
Service
Have the tool serviced by a qualied f.
repair person at a qualied shop us-
ing only identical replacement parts.
This will ensure the safety of the tool
is maintained.
Specic Safety Rules
Maintain labels and nameplates on1.
this Jack. These carry important
safety information. If unreadable or
missing, contact Harbor Freight Tools
for a replacement.
Do not exceed the2. 10 ton (20,000
lbs.) capacity of the Long Frame
Jack.
Bleed the hydraulic system of the3.
Long Frame Jack before its initial
use. (See Bleed Instructions.)
Always place the Jack on a dry, oil/4.
grease free, solid, level oor surface
capable of supporting the weight
of the Jack, the load to be lifted
and all other additional tools and
accessories.

Page 4SKU 66593 For technical questions, please call 1-800-444-3353.
Apply the vehicle’s parking brake5.
and chock the non-lifted tires before
raising the vehicle.
Lift the vehicle only by the6.
manufacturer-recommended lifting
points.
Stay out from under the load while it7.
is being lifted or supported only by
this Jack.
Avoid rapid load descent. Turn the8.
Release Screw slowly.
Do not use for aircraft purposes.9.
Do not leave the tool unattended10.
when it is connected to a compressed
air supply. Release the tool’s load
before leaving.
This product is not a toy. Keep it out11.
of reach of children.
When lifting only one wheel, make12.
sure to support the load immediately
with one jack stand (not included)
placed under the side of the vehicle
being lifted. Align the saddle of the
jack stand directly under the vehicle’s
frame or recommended lifting point.
When lifting the entire front end or13.
rear end of a vehicle, make sure to
support the load immediately with
two jack stands. Align the saddles
of the jack stands directly under the
vehicle’s frame or recommended
lifting points. Also, make sure the
jack stands are adjusted at the same
height.
Use the Long Frame Jack only on14.
vehicles whose frames have lifting
points (on its seam or frame) capable
of aligning with the Bottle Jack.
Do not use the Jack with the vehicle’s15.
engine running. When running, the
vehicle’s engine produces carbon
monoxide, a colorless, odorless, toxic
fume that, when inhaled, can cause
serious personal injury or death.
Always keep hands, ngers, and 16.
feet away from all moving parts of
the Jack when applying or releasing
a load. Remain clear of the vehicle
being raised or lowered. People and
animals should be kept at a safe
distance when using the Jack.
Do not allow anyone in the vehicle17.
when using the Jack. Keep all
bystanders a safe distance away
from the vehicle.
Never use this Jack to lift both ends18.
of a vehicle at the same time.
Before lowering the Jack, make sure19.
tool trays, jack stands, and all other
tools and equipment are removed
from under the vehicle.
The warnings, precautions,20.
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.
SAVE THESE
INSTRUCTIONS.

Page 5SKU 66593 For technical questions, please call 1-800-444-3353.
SPECIFICATIONS
Maximum Lifting Capacity 10 Tons (20,000 lb.)
Minimum Lift Height 6-1/4"
Maximum Lift Height 22-1/8"
Net Weight 326.30 lbs
Jack Handle 36-1/4"L
Wheels and Casters All steel
UNPACKING
When unpacking, check to make sure
that the item is intact and undamaged. If
any parts are missing or broken, please
call Harbor Freight Tools at the number
shown on the cover of this manual as soon
as possible.
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.
ASSEMBLY
Slip the bottom end of the Handle1.
(1.5) into the opening of the Fork
Member (2.4) .
Put the Washer (1.6) onto Fastening2.
Screw (1.7) and insert into threaded
hole in back of Fork Member.
Tighten Fastening Screw securely3.
with an adjustable wrench (not in-
cluded).
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.
Tool Set Up
IMPORTANT: The Jack comes lled with
oil. But the hydraulic system must be
bled prior to initial use. (See Bleed-
ing Instructions Pg. 8.)
Make sure the vehicle is parked on a1.
at, level, solid, ground surface.
Turn off the vehicle’s engine. Place2.
the vehicle’s transmission in “PARK”
(if automatic) or in it lowest gear (if
manual). Set the emergency brake.
Then chock the wheels that are not
being lifted.
Check to make sure the Saddle (7.1)3.
is fully lowered. If not, move the
Handle Lever (1.4) to Position D.
(See Fig. 2.)
Once the Jack’s Lift Arm (7.6) is fullya.
lowered, move the Handle Lever
(1.4) to Position A. (See Fig. 2.)
Fig. 1
Foot Pedal (2.1)
Hinge Rivet
4. Pump the Foot Pedal (2.1) after
carefully positioning the Saddle (7.1)
under the vehicle manufacturer’s
recommended lifting point. (See
vehicle manufacturer’s manual for
location of lift points when lifting only

Page 6SKU 66593 For technical questions, please call 1-800-444-3353.
one wheel and frame lifting points
when lifting the entire front or rear
end of the vehicle.)
Handle Lever Positioning:
Moving the Valve Release Lever (1.4)1.
to the desired position. (See Fig. 2.)
Position D
Position C
Position A
Valve
Release
Lever
Position B
Fig 2
a. Position A: Shuts the Release Valve
allowing lifting of the Saddle (7.1)
by pumping the Handle (1.5) up and
down or pumping the Foot Pedal
(2.1).
Note: The Handle is not locked in this
position.
Position B:b. The Deector Rod (1.3)
is not engaged in the Base (2.6)
when at this position.
Fig 3
Positioning
Holes
Foot
Pedal
(2.1)
c. Position C: Allows the Deector
Rod to drop into one of three holes
(See Fig. 3.) locking the Handle (1.5)
in one of three angles, vertical, hori-
zontal and 45°.
Position D:d. Opens release valve to
lower the Saddle.
Note: With the release valve in its shut
position, the Foot Pedal (2.1) can be
pumped to raise the Saddle regard-
less of the Handle’s angle.
To raise the vehicle:
It is recommended to move the1.
Valve Release Lever to Position B,
then move the Handle to the desired
angle.
The Valve Release Lever and De-•
ector Rod will drop down into one
of three holes (at Position C) lock-
ing the Handle in either a vertical,
45° or horizontal angle.
Although the Foot Pedal (2.1) will•
raise the Lift Arm (7.6), it is recom-
mended to lock the handle vertically
with the Valve Release Lever at Po-

Page 7SKU 66593 For technical questions, please call 1-800-444-3353.
sition C. The Handle is less likely to
be in the way, be a tripping hazard,
and the upright Handle (2.5) can
be used to maintain balance while
pumping the Foot Pedal (2.1).
2. Pump the Foot Pedal (2.1) until
the Saddle of the Jack has nearly
reached the vehicle lifting point.
The Saddle’s center should be po-•
sitioned directly under the vehicle’s
lifting point. If not, reposition the
Jack before lifting.
If the Jack and Saddle are in proper3.
position, continue to pump Foot
Pedal, raising the vehicle.
Once the vehicle is raised, place a4.
jack stand (not included) at the prop-
er support location(s) according to
the vehicle manufacturer’s manual.
If using two jack stands, make sure•
they are at the same point on each
side of the vehicle and at the same
height. Always raise the vehicle the
least amount possible.
Slightly lower the Jack to ease the5.
vehicle onto the jack stands. Do this
by slowly sliding the Valve Release
Lever (1.4) to the right (Position D)
until the Saddle (7.1) lowers slightly
and the vehicle rests on the jack
stand(s).
While standing safely aside, gently6.
rock the vehicle to determine if it is
stable on the jack stand(s). If it is
not, raise the vehicle, and reposition
the jack stand(s).
WARNING! When performing this proce-
dure, be prepared to stand clear of
the vehicle as the vehicle can fall off
the jack stand(s) causing personal
injury and/or property damage.
To lower the vehicle:
When the work to the vehicle is com-1.
pleted, and prior to lowering the ve-
hicle, make sure to remove all tools,
old vehicle parts, etc. from under the
vehicle.
Pump Foot Pedal (2.1) to raise the2.
vehicle slightly above the saddle(s) of
the jack stand(s). Then remove the
jack stand(s) from under the vehicle.
Slowly3. move the Handle Lever to
Position D to lower the vehicle to the
ground. (See Fig. 2.)
MAINTENANCE AND
SERVICING
Procedures not specically
explained in this manual
must be performed only by a
qualied technician.
Move the Handle Lever (1.4)
to Position D to release all
hydraulic pressure before
performing any inspection,
maintenance, or cleaning
procedures.
BEFORE EACH USE,1. inspect the
general condition of the Jack. Check
for loose screws, misalignment or
binding of moving parts, cracked or
broken parts, and any other condition
that may affect its safe operation.
The moving parts can be greased2.
through built-in Zerk ttings (4.3, 5.5,
7.10)
AFTER USE,3. clean external surfaces
of the Jack with a clean cloth. Do not
use solvents.

Page 8SKU 66593 For technical questions, please call 1-800-444-3353.
BLEEDING INSTRUCTIONS:
Thoroughly test the Jack for proper4.
operation prior to its actual use. If
the Jack appears not to be working
properly, it may be necessary to
purge air from the hydraulic system.
To do so:
Move Valve Release Lever to lowera.
the Saddle to Position D. The Lever
must remain here to keep the pres-
sure Release Valve open. (See Fig.
2.)
Remove the two Screws (8.5), lo-b.
cated just behind the Lift Arm (7.6),
holding on the Cover Plate (8.1) in
place.
The Cover Plate can then swing upc.
on the Hinge Rivets (9.2) (the Hinge
Rivet is the Cover Plate’s pivot point
just in front of the Handle), like the
hood of a car.
Fig.4
Factory Plug,
Do Not Touch
Oil Filler Plug (9.1)
d. Carefully remove the Oil Filler Plug
(9.1) with a 22 socket wrench, mak-
ing sure not to lose the at copper
washer with it. (See Fig. 4.)
Top off the hydraulic reservoir withe.
fresh hydraulic jack uid to a point
just below the oil Filler Plug (9.1)
orice.
Pump the Foot Pedal (2.1) ten tof.
fteen times in rapid succession.
Top off the hydraulic oil if required. g.
Clean off the Oil Filler Plug (9.1) withh.
a clean cloth and thread back into
the oil ll orice.
Wipe area surrounding the Oil Filleri.
Plug with a clean cloth.
Let the Handle Lever (1.4) return toj.
Position C, allowing the pressure
valve to close. (See Fig. 2.)
Lower the Cover Plate back downk.
and re-install the two Screws secur-
ing it.
IMPORTANT: After bleeding the Jack,
test for proper operation prior to
its actual use.
NOTE: To prevent damage to the Jack,
check for the presence of air and/or
low hydraulic oil regularly.
WHEN STORING,5. move the Handle
to an appropriate angle, such
as vertical, and move the Valve
Release Lever (1.4) to Position C,
locking the Handle, preventing it
from accidentally falling and causing
possible injury or property damage.
Always6. store the Jack with its Handle
locked, and its accessories in a
clean, dry, safe location out of reach
of children and other unauthorized
people.

Page 9SKU 66593 For technical questions, please call 1-800-444-3353.
Problem Solution
Jack will not raise the Lift Arm when pumping
the Foot Pedal.
Bleed the Hydraulic Jack of excess air.1.
Valve Release Lever is in Position D. Move2.
the Lever to any other position making sure it
isn’t stuck in the open position.
Purge air from the hydraulic system.3.
Make sure there is adequate hydraulic uid in 4.
the oil reservoir.
Take the Hydraulic Jack to a qualied shop for 5.
inspection and repair.
Wheels make noise when rolling the Jack or
raising the Lift Arm.
Use grease gun to grease all Zerk Fittings1.
(4.3, 5.5, 7.10).
TROUBLESHOOTING
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.

Page 10SKU 66593 For technical questions, please call 1-800-444-3353.
ASSEMBLY DIAGRAM

Page 11SKU 66593 For technical questions, please call 1-800-444-3353.
PARTS LIST
Part Description
1.1 Cap
1.2 Compression Spring
1.3 Deector Rod
1.4 Valve Release Lever
1.5 Handle (Control Rod)
1.6 Washer
1.7 Fastening Screw
2.1 Foot Pedal
2.2 Wire
2.3 Pin
2.4 Fork Member
2.5 Bushing
2.6 Base
2.7 Spring
2.8 Pin
2.9 Cap
2.10 Shaft
2.11 Screw
2.12 Washer
2.13 Washer
2.14 Clamp Ring
2.15 Bushing
3.22 Connecting Brush
3.23 Cotter Pin
3.24 Connecting Rod
3.25 Driving Rod
3.26 Cotter Pin
3.27 Pin
4.1 Cover
4.2 Wheel Cover
4.3 Zerk Fitting
4.4 Washer
4.5 Screw
4.6 Bearing Cover
4.7 Steel Ball
4.8 Bearing Holder
4.9 Wheel Fork
4.10 Wheel
Part Description
4.11 Rivet
5.1 Axle
5.2 Nut
5.3 Stop Ring
5.4 Wheel
5.5 Zerk Fitting
5.6 Roller
5.7 Stop Ring
5.8 Split Ring
6.1 Joint
6.2 Screw
6.17 Screw
6.18 Spring
7.1 Saddle
7.2 Saddle Carrier
7.3 Axle
7.4 Level Supporting Rod
7.5 Axle
7.6 Lift Arm
7.7 Bolt
7.8 Axle
7.9 Axle
7.10 Zerk Fitting
7.11 Split Ring
8.1 Cover Plate
8.2 Side Plate
8.5 Screw
8.6 Washer
8.7 Nut
8.8 Nut
8.9 Washer
9.1 Oil Filler Plug
9.2 Hinge Rivet

Page 12SKU 66593 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, 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
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]
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.