ElEctric trailEr jack - Harbor Freight Tools

3500 lb. capacity
Electric trailer jack
67597
Set up 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 © 2010 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.

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
1.
2.
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 Tool Safety Warnings
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in serious
injury.
Save all warnings and
instructions for future reference.
The term ″tool″ in the warnings
refers to your Electric Trailer Jack.
Work area safety
Keep work area clean and well
lit. Cluttered or dark areas invite
accidents.
Personal safety
a. Stay alert, watch what you are
doing and use common sense
when operating a tool. Do not use
a tool while you are tired or under
the influence of drugs, alcohol
or medication. A moment of
inattention while operating tools may
result in serious personal injury.
b. Use personal protective
equipment. Always wear eye
protection. Safety equipment such
as non-skid safety shoes or a hard
hat used for appropriate conditions
will reduce personal injuries.
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 2

3.
c. Do not overreach. Keep proper
footing and balance at all times.
This enables better control of the
tool in unexpected situations.
d. Dress properly. Do not wear
loose clothing or jewelry. Keep
your hair, clothing and gloves
away from moving parts. Loose
clothes, jewelry or long hair can be
caught in moving parts.
Tool use and care
a. Do not force the tool. Do not
attempt to lift more than the 3,500
lb. maximum lifting capacity of
this tool. The correct tool will do
the job better and safer at the rate
for which it was designed.
1.
2.
3.
4.
5.
identical replacement parts. This
will ensure that the safety of the tool
is maintained.
Specific Safety Warnings
Do not exceed 3500 Lb. capacity.
Do not use Crank while power lift is in
use.
Use on flat, level, hard surface
capable of supporting load.
Wear ANSI-approved safety goggles
during use.
Prevent trailer wheels from moving by
using wheel chocks while raising or
lowering.
4.
b. Store idle tools out of reach of
children and do not allow persons
unfamiliar with the tool or these
instructions to operate it. Tools are
dangerous in the hands of untrained
users.
c. Maintain tools. Check for
misalignment 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
before use. Many accidents are
caused by poorly maintained tools.
d. Use the tool and accessories
in accordance with these
instructions, taking into account
the working conditions and the
work to be performed. Use of the
tool for operations different from
those intended could result in a
hazardous situation.
Service
a. Have your tool serviced by a
qualified repair person using only
6.
7.
8.
9.
10.
11.
12.
Before towing, fully raise trailer jack
and secure properly.
Keep out from under jack and tongue
when applying and releasing load,
when jack is supporting load, or when
moving trailer.
Inspect before use. Do not use if
parts are loose or damaged.
Use in accordance with the
Department of Transportation (DOT)
regulations. Information about DOT
regulations can be found at www.dot.
gov/regulations.html
Read manual before installation and/
or use.
Maintain labels and nameplates on
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
This product is not a toy. Keep it out
of reach of children.
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 3

13.
14.
15.
Not for aircraft purposes.
Trailer Jack must always be retracted
when towing the trailer.
The warnings, precautions,
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.
Specifications
Weight Capacity 3,500 lb.
Motor
Travel Length 17 3/4”
12 VDC, 11.5 A
LIft Range 8-1/2” - 26-1/4”
Application
Hardware (sold
separately)
For use with A-frame trailers
3 bolts 3/8”D (grade 5 or better),
3 lock nuts, 6 washers
Unpacking
When unpacking, make sure item
is intact and undamaged. If parts are
missing or broken, call Harbor Freight
Tools at 1-800-444-3353.
Components
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 4

set up 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.
Insert Jack into trailer opening
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.
1.
2.
Mounting
This Electric Jack is designed to
replace an existing manual-only
trailer jack. Check that the Outer
Tube (33) of the Electric Jack will fit
into the existing jack location and
that the Mounting Plate holes align
with the bolt locations on your trailer.
Modify the trailer as needed.
Block the wheels and support the
trailer A-Frame securely using jack
stands (sold separately).
Remove the existing jack.
Footpad
(36)
Figure 2
Outer
Tube (33)
Lock
Pin (35)
Inner
Tube (34)
3. Remove the Lock Pin (35) and slide
out the Footpad (36) from the Jack.
4.
5.
6.
Insert the bottom section of the Outer
Tube (33) into the A-Frame jack
opening so that the Motor Housing is
toward the front of the trailer and the
Mounting Plate holes line up with the
bolt holes in the trailer.
To secure the Mounting Plate to
the A-Frame, use nuts, bolts and
washers (all sold separately) as listed
under Hardware in the Specifications
chart (previous page). The bolts
need to be long enough to fit through
the jack flange and the trailer, with
enough room for two washers and
the lock nut. Slide a washer onto
each bolt then insert them from the
top side and attach a flat washer and
lock nut from the underside of the
frame.
Replace the Footpad and insert the
Lock Pin.
Wiring
The Jack needs to be properly wired
for use. Have a qualified technician
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 5

1.
2.
1.
2.
perform the wiring if you are not
familiar with the following procedures.
This jack is internally grounded. For
added safety, connect the 10-gauge
grounding wire (the shorter wire) to a
good bare metal ground on the trailer.
To wire the Jack to battery power:
a. If wiring to the trailer battery, connect
the positve wire (the longer wire) to
the positive (+) battery terminal and
include an ON/OFF switch in the
wiring so you can turn off power to
the unit.
b. If wiring to the vehicle battery, route
a 10-gauge wire (sold separately)
from the positive (+) terminal of a
12VDC battery to a location near
the Jack. Attach the female side of
a quick connect (sold separately)
to the end of the wire and the male
side to the positive Jack wire (the
longer wire). Plug the quick connect
sections together.
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.
Mount and dismount Trailer only on
smooth, level surfaces.
Block the trailer wheels to prevent the
trailer from rolling.
Footpad
(36)
Figure 4
3. Remove the Lock Pin (35).
4.
Outer
Tube (33)
Lock
Pin (35)
Inner
Tube (34)
If using the Jack with electric
power:
a. If wired to the vehicle battery, plug
the Jack wire into the quick connect.
If wired to the trailer battery, turn on
the ON/OFF switch.
b. If needed, turn on the LED lights
(26) using the Light Switch (15).
Note: The LED lights will only work when
the Jack wiring is powered.
c. Check that the Switch Cover (6) is
secured over the Power Switch (4).
Figure 5
Retrack
Jack
Release
to
Stop
Front of
Trailer
Power
Switch
(4)
Extend
Jack
d. To extend the Jack, which will raise
the trailer, pull the Power Switch (4)
away from the Jack.
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 6

e. To retract the Jack, which will lower
the trailer, push the Power Switch
toward the Jack.
f.
To stop the Jack, release the Power
Switch.
Insert
Lock
Pin
here
Outer
Tube (33)
CAUTION: Release the Power Switch
when the motor slows, or switches
off, to prevent damage to the motor.
Wait 15 seconds for the motor to
reset before operating the Jack
again.
5.
If using the Jack manually:
a. Disconnect power to the Jack.
Inner
Tube
(34)
Footpad
(36)
Lock
Pin (35)
Figure 7
6. Adjust the level of the Jack so that
the hole in the Inner Tube (34) lines
up with one of the Footpad holes.
b. Remove the Cap (22) on the top of
the Jack to access the Drive Collar
(12).
c. Insert the Crank (30) onto the Drive
Collar.
d. Rotate the Crank clockwise to retract
the Jack, lowering the trailer, and
counterclockwise to extend the Jack,
raising the trailer.
7.
8.
Insert the Lock Pin through the holes.
When finished raising or lowering the
trailer:
a. If using with electric power,
disconnect power to the Jack.
b. If using the Jack manually, remove
the Crank and replace the Cap.
Store the Crank in a safe place for
future use.
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 7

Maintenance And
Servicing
Lubricating Gears
Procedures not specifically
explained in this manual
must be performed only by a
qualified technician.
To prevent
serious injury
from tool failure:
Do not use damaged
equipment. If abnormal noise
or vibration occurs, have the
problem corrected before
further use.
Cleaning and Maintenance
1. BEFORE EACH USE, inspect the
general condition of the Jack. Check
for loose hardware, misalignment or
binding of moving parts, cracked or
broken parts, and any other condition
that may affect its safe operation.
a. Unthread the four Screws (3) on the
top of the Housing Cover (21) and
remove the Housing Cover.
b. If needed repack gears with lithium
based machine grease.
c. Replace the Housing Cover and
secure the screws in place.
Lubricating Jack Screw and Nut
2. After Use, wipe external surfaces
of the tool with a clean cloth.
Lubrication
Annually lubricate the Gears, Jack
Screw and Nut.
Prepare the Jack as follows:
a. Support the weight of the trailer so
the Jack is not providing support.
b. Fully extend the Footpad so the
Lock Pin is in the fourth hole from
the bottom of the Footpad.
c. Adjust the Jack so that the foot pad
is 2” off the ground.
a. Unthread the four Socket Head Bolts
(43) on the Outer Tube (33) with a
1/4” hex wrench (sold separately).
b. Pull the motor head away from the
Outer Tube.
c. Clean and regrease the Jack Screw
(37) and Drive Collar (12) with
lithium based grease.
d. Reassemble and tighten the pieces
together.
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 8

Wiring Diagram
SKU 67597
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Page 9

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
Part Description Qty
1 Motor 1
2 Motor Housing 1
3 Screw #8-32 x 1/2” 8
4 Power Switch 1
5 Switch Housing 1
6 Switch Cover 1
7 Screw #5-40 x 3/8” 4
8 Bolt 3/8 -16 x 1 2
9 Circuit Breaker 1
10 Grommet 1
11 Pin 2
12 Drive Collar 1
13 Washer 1
14 Bearing 1
15 Light Switch 1
16 Bushing 5/8ID x 7/8OD 1
17 Washer 1
18 Pin 1
19 Lock Washer 1
20 Socket Head Screw 1/4 x 5/8 1
21 Housing Cover 1
Part Description Qty
22 Cap 1
23 Main Gear Drive 1
24 Pinion Gear 1
25 Pinion Key 1
26 LED Light 2
27 Spur Gear 1
28 Main Gear Housing 1
29 Bushing 3/8ID x 1/2OD 1
30 Crank 1
33 Outer Tube 1
34 Inner Tube 1
35 Lock Pin 2-1/2” 1
36 Footpad 1
37 Jack Screw 1
38 Nut 1
39 Washer 13/16” 8
40 Pin-Cotter 2
41 Nut Cost 1
42 Lock Washer 5/16” 4
43 Socket Head Bolt 5/16” x 1” 4
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 10

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
available individually as replacement parts.
SKU 67597
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Page 11

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 verifies 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 specific legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
SKU 67597
For technical questions, please call 1-800-444-3353.
Page 12