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500 LB. SWING BACK
TRAILER JACK
WITH 10” TIRE
92372
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
Copyright© 2004 by Harbor F reight 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 and replacement parts, please call 1-800-444-3353
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Specifications
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Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
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 dr y place for future reference.
Safety Warnings and Precautions
WARNING: When using this product, basic safety precautions should always be followed to reduce the risk of personal injury and damage to equipment.
Read all instructions before using this product!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Keep work area well lit.
3. Keep children away . Children must ne ver be allow ed in the work area. Do not let them
handle the Jack.
4. Store idle equipment. When not in use , Jacks must be stored in a dry location to inhibit
rust. Always lock up Jacks and keep out of reach of children.
5. Use the right product for the job. Do not attempt to f orce a small product or attachment
to do the work of a larger industrial product. There are certain applications for which this
product was designed. It will do the job better and more safely at the rate f or which it was
intended. Do not modify this product and do not use this product for a purpose for which
it was not intended.
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving
parts. W ork boots, work gloves and work pants are necessary when working. Protectiv e,
electrically nonconductive clothes and nonskid footwear are recommended when w orking.
Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI approved impact safety goggles.
8. Do not overreach. Keep proper footing and balance at all times.
9. Maintain products with care. Keep the Jack clean for better and safer performance.
The handle must be kept clean, dry, and free from oil and grease at all times.
10. Stay alert. Watch what you are doing, use common sense. Do not operate any product
when you are tired.
11. Never work alone. Always have an assistant nearby to help if unexpected problems
arise during use. An assistant can also get help if you are injured.
12. Check for damaged parts. Before using any product, any part that appears damaged
Page 2SKU 92372 For technical questions, please call 1-800-444-3353.
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should be carefully checked to determine that it will operate properly and perform its
intended function. Check f or alignment and binding of moving parts; an y broken parts or
mounting fixtures; and any other condition that may affect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician.
13. Replacement parts and accessories. When having serviced, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this product. Approved accessories are av ailable from Harbor F reight
Tools.
14. Do not operate product if under the influence of alcohol or drugs. Read warning
labels if taking prescription medicine to determine if your judgment or reflexes are impaired
while taking drugs. If there is any doubt, do not operate the product.
15. Maintenance. For your saf ety, service and maintenance should be performed regularly
by a qualified technician.
Warning: The warnings, cautions, 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.
Specific T railer Jack Safety Warnings
1. Roll away. A v oid situations which allo w the trailer to roll a w a y on the caster wheel and
trailer wheels. If using the trailer jack on an incline, be sure to chock the wheels. Never
leave the trailer unattended while on the jack if the wheels are not chocked.
2. Swivel failure. The swivel is very strong and exceeds the stated capacity of the jack.
Howe v er ab use , corrosion or damage ma y cause the s wiv el to break. Regularly inspect
the swivel for damage, and discontinue use if the swivel is damaged.
3. Loose mounting plates or hardware. Never operate this Trailer Jack if the mounting
hardware is not secure on the tongue of the trailer. Regularly inspect the hardware for
proper assembly.
4. Overloading. Never attempt to lift or support loads in excess of the rated strength of
this Trailer Jack. Sudden failure of the Jack may result in serious personal or property
injury.
BE AWARE OF D YNAMIC LOADING!
Suddenly dropping a load on the trailer that the jac k is attached to may create,
for a brief instant, an excess load, which may result in damage to the pr oduct and/
or personal injury.
5. Swing up before driving. Always check to be sure that the Jack is properly swung up
into its raised position before driving. Driving with the Jack lowered can cause serious
damage to property . This Trailer Jack is not designed for highway use.
6. Dollying on uneven surfaces. The Tire on this Jack makes moving your tr ailer without
a vehicle convenient. However, moving the trailer on uneven or inclined surfaces can
cause personal injury or potential damage to the Jack or other property.
7. Not to be used for aircraft purposes.
Page 3SKU 92372 For technical questions, please call 1-800-444-3353.
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Unpacking
When unpacking, check to make sure the parts listed on page 7 are included. 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.
Assembly / Installation
WARNING: The trailer tongue must be square or rectangular in profile for this Jack to
mount properly. A rounded tongue will allow the Jack to rotate to the side
causing the trailer to fall suddenly, causing potentially serious personal or
property injury.
NOTE: Do not drill holes or otherwise damage the trailer tongue when installing this
Jack. Failure of the trailer tongue may result.
NOTE: Installing this Jack is most easily done with the Trailer mounted on the towing
vehicle hitch.
FIGURE 1
Handle (1)
FIGURE 2
Hardware Set (19)
(1 of 4)
Tire (18)
See detail inset in FIGURE 2.
Mounting Bar (20)
(1 of 2)
Swivel Plate (6)
Outer Tube (7)
Inner Tube (8)
Page 4SKU 92372 For technical questions, please call 1-800-444-3353.
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Assembly / Installation (continued)
Refer to FIGURES 1 and 2 on page 4, and the Assembly Drawing on page 8.
1. Slide the Handle (1) over the Shaft and secure it with the set Screw (2).
2. T o mount the Tire (18): Slide the Axle (10) through a Washer (9), the Inner Tube (8) Left
Bracket, a Spacer (11), the Wheel, the other Spacer (11), the Inner Tube (8) Right
Bracket, and the other Washer (9). Inser t a Cotter Pin (12) through the axle on each
side, and bend both over completely to secure.
3. Measure the trailer tongue for the best location to mount the Jack. Remember that,
while in its storage position, the Jack m ust not interf ere with the V ehicle or trailer when
turning or passing over speed bumps, boat ramps, etc.
4. Pull on the Swivel Handle (15) to adjust the Swivel Plate (6), so the Jack is in the
lowered position.
5. Hold the Jack against the trailer tongue while using the Jack Handle (1) to lower the
Tire (18) to the ground.
6. Using the four Hardware Sets (19) and two Mounting Bars (20), attach the Jack to the
trailer tongue. The Mounting Bars m ust run across (perpendicular) to the trailer tongue .
NOTE: You may wish to use some remo v a b le thread loc king compound (not included)
on the bolt threads to help secure them.
7. Test the operation of the Trailer Jack. Make adjustments if necessary.
8. Tighten the Hardware Sets (19) firmly and evenly.
Operation
Dismounting The T railer from The T owing V ehicle.
WARNING:Before dismounting, make sure the trailer wheels are properly chocked to
prevent the trailer from rolling. This procedure requires at least 2 people to
be present.
1. With the trailer on the hitch, pull the Swivel Handle (15), and rotate the Ja ck downwards.
WARNING: Keep your fingers away from the Swivel Plate area (See FIGURE 2),
and do not allow the Tire (18) to strike your foot as the Jack rotates downward.
2. Assure that the Swivel Handle pins are in place, locking the Jack into the lowered
position.
3. Rotate the Handle (1) counterclockwise to lower the Tire (18) to the ground. Continue
to crank just enough for the Trailer Jack to take the weight of the trailer. This will make
it easier to disengage the trailer hitch.
4. Disengage the trailer hitch. Remember to disengage any safety chains, electrical
connections and other connections between the vehicle and the trailer.
5. You may need to extend the Jack further to clear the trailer hitch. When the vehicle is
completely clear, and it is safe to do so, drive the vehicle away from the trailer.
WARNING: Be sure to have 2 spotter s watch this operation to be sure the trailer is clear
of the vehicle, and that the trailer does not roll away.
Page 5SKU 92372 For technical questions, please call 1-800-444-3353.
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Operation (continued)
Using the Jack to Mount The Trailer to the Towing Vehicle.
WARNING: Do not attempt to lift the trailer tongue if it is too heavy for you. You may
need assistance for some parts of this operation. This procedure requires at
least 2 people to be present.
1. If the trailer tongue is resting on the ground, pull the Swivel Handle (15) allowing the
Trailer Jack to rotate downward.
2. If you are able, lift the tr ailer tongue, while the J ack rotates into the lo wered position. If
the Tongue is too heavy get assistance.
3. Pull the Swivel Handle (15) out, then reengage the pins, locking the Jack into the
lowered position.
4. Rotate the Handle (1) clockwise to raise the trailer to just abo v e the le v el of the to wing
vehicle’s hitch.
5. Have an assistant spot for you as you move the vehicle close to the trailer. Or, if on
smooth ground, roll the trailer to the vehicle.
6. Mount the trailer onto the towing vehicle’s hitch.
Keep your fingers clear.
7. T urn the Handle (1) counterclockwise to raise the Jac k slightly off the ground, transferring
the trailer weight onto the towing vehicle.
8. Pull out the Swivel Handle (15), and rotate the Jack into its upr ight position. Be sure
that the Swivel Handle locking pins are fully engaged and the wheel choc ks are removed
before driving away.
Maintenance
If you discov er any damage , hav e all damaged parts repaired or replaced before using
your Trailer Jack.
1. Regularly inspect the Springs (17) and Swivel Handle (15) locking pins to be sure they
will properly engage and lock the Jack in both the up and do wn positions. Check all of
the Hardware Sets (19) regularly to ensure that they are tight and the Jack is firmly
attached to the trailer tongue.
2. Keep the Swivel Plate (6) lubricated with light grease. Inspect it regularly for damage.
3. Keep the crank mechanism (inside the Outer Tube (7)) and the top shaft of the Inner
Tube (8) lightly greased. Ensure that this mechanism functions smoothly.
4. Inspect the Tire (18) regularly for damage. Keep the tire filled to a cold pressure of 30
PSI. Keep the axle lightly lubricated.
5. Inspect the entire unit for corrosion which ma y be caused b y exposure to salt water or
weather . Rinse thoroughly and re-lubricate promptly after being immersed in salt water .
6. Keep all moving parts lightly lubricated to prevent corrosion. If corrosion develops , you
may paint exterior parts of the Jack to help arrest and prevent further damage.
Page 6SKU 92372 For technical questions, please call 1-800-444-3353.
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Parts List
Part No. Description Qty.
1 Handle 1
2 Screw M8x10 1
3 Bearing 1
4 Screw Rod 1
5 Nut 1
6 Swivel Plate 1
7 Outer Tube 1
8 Inner Tube 1
9 Washer 2
10 Axle 1
11 Spacer 2
12 Cotter Pin 2
13 Washer 1
14 Nut M16 1
15 Swivel Handle 1
16 Bushing 2
17 Spring 2
18 Tire 1
19 Hardware Set 4
20 Mounting Bar 2
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUF ACTURER AND/OR DISTRIBUT OR HAS PRO VIDED THE PAR TS 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 THA T 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 ST A TES T HA T ALL REP AIRS AND PARTS REPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NO T BY THE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PR ODUCT OR REPLACEMENT PARTS THERETO, OR ARISING
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
NOTE: Some par ts are listed and shown for illustration pur poses only and are not available
individually as replacement parts.
Page 7SKU 92372 For technical questions, please call 1-800-444-3353.
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Assembly Drawing
Page 8SKU 92372 For technical questions, please call 1-800-444-3353.
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