Harbor Freight 2575 Users Manual

2575 to the manual b3d44261-4469-434f-a5df-46c7be50fb3a

2015-01-25

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A-TONGUE TRAILER
1,400 LB. WEIGHT CAPACITY

Model 02575
Assembly And Operation Instructions
WARNING!

IMPORTANT INfORMATION
This trailer’s Hitch Coupler MUST be
properly secured to the hitch ball of the towing
vehicle. After assembly and attachment, pull
up and down on the Hitch Coupler to make
sure the hitch ball is fitting snugly in the Hitch
Coupler. There must be no play between the
hitch ball and Hitch Coupler. If there is play,
tighten the Adjustment Nut until no play is
present. If the Adjustment Nut is too tight, the
Handle will not lock. Carefully read and follow
the complete instructions in this manual
BEfORE setup or use.

If the Coupler is not secured
properly, the ball could come loose
while the trailer is in motion, possibly
causing property damage, sERIOUs
PERsONAL INjURY, or dEATH.

Due to continuing improvements, actual product may differ slightly from the product described herein.

3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com

To prevent serious injury, read and understand
all warnings and instructions before use.
Copyright© 2003 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.
Manual Revised 04j, 07f

Contents
SPECIFICATIONS..................................................................................... 3
GENERAL SAFETY WARNINGS AND PRECAUTIONS......................... 3
SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS....................... 4
UNPACKING............................................................................................. 5
ASSEMBLY INSTRUCTIONS................................................................... 6
To Assemble the Tires, Wheels, and Axle:.......................................................... 6
To Assemble the Frame and Tongue:.................................................................. 7
To Attach the Springs, Tires, Wheels, and Axle to the Frame:.......................... 8
To Attach the Fenders:........................................................................................ 10
To Attach the Side Running Lights:................................................................... 10
To Attach the Tail Light Bracket and License Plate Bracket:........................... 10
To Attach the Tail Lights:..................................................................................... 10
To Attach the Trailer Beds:.................................................................................. 11

OPERATING INSTRUCTIONS................................................................. 12
Tire information............................................................................... 13
Tire Terminology Glossary.................................................................................. 13
Tire Markings........................................................................................................ 14
Tire Inflation and Load Limit............................................................................... 15

Tire care.............................................................................................. 16
Checking Tire Pressure....................................................................................... 16
Steps for Maintaining Proper Tire Pressure...................................................... 16
Tire Size................................................................................................................ 17
Tire Tread.............................................................................................................. 17
Tire Rotation......................................................................................................... 17
Tire Balance and Alignment................................................................................ 17
Tire Repair............................................................................................................ 17

Vehicle Load Limit............................................................................. 18
Steps for Determining Correct Load Limit......................................................... 18

INSPECTION, MAINTENANCE, AND CLEANING.................................. 18
Parts List and DIAGRAMS................................................................ 19
Parts List............................................................................................................... 19
Assembly Diagram A........................................................................................... 20
Assembly Diagram B........................................................................................... 21
Wiring Diagram for Lights................................................................................... 22

LIMITED 90 DAY WARRANTY................................................................. 23
SKU 02575

For technical questions, please call 1-800-444-3353.

Page

SPECIFICATIONS
Maximum Payload Capacity
Bed Size
Overall Dimensions
Tire Size & Type
Tongue Level Height
Ball Coupler Size
Construction
Net Weight

1400 Pounds (dead weight)
40” x 50”
87-1/2” L x 52-3/4” W x 22-3/4” H
4.80 x 12”, 4 Ply, Tubeless
14” From Ground
1-7/8”
Formed and Welded Steel
195 Pounds

Save This Manual
You will need this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures, parts list and assembly diagram.
Keep your invoice with this manual. Write the invoice number on the inside of the front
cover. Keep this manual and invoice in a safe and dry place for future reference.

GENERAL SAFETY WARNINGS AND PRECAUTIONS
1.

KEEP WORK AREA CLEAN AND DRY. Cluttered, damp, or wet work areas invite
injuries.

KEEP CHILDREN AWAY FROM WORK AREA. Do not allow children to play on
this product.

STORE IDLE EQUIPMENT. When not in use, tools and equipment should be stored
in a dry location to inhibit rust. Always lock up tools and equipment, and keep out
of reach of children.

DO NOT USE THIS PRODUCT IF UNDER THE INFLUENCE OF ALCOHOL OR
DRUGS. Read warning labels on prescriptions to determine if your judgement or
reflexes are impaired while taking drugs. If there is any doubt, do not attempt to
use this product.

USE EYE AND HAND PROTECTION. Wear ANSI approved safety impact eye
goggles when assembling this product. ANSI approved safety impact eye goggles
are available from Harbor Freight Tools.

DRESS SAFELY. Do not wear loose clothing or jewelry, as they can become
caught in moving parts. Wear a protective hair covering to prevent long hair from
becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up
above elbows.

DO NOT OVERREACH. Keep proper footing and balance at all times to prevent
tripping, falling, back injury, etc.

INDUSTRIAL APPLICATIONS MUST FOLLOW OSHA REQUIREMENTS.

SKU 02575

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Page

STAY ALERT. Watch what you are doing at all times. Use common sense. Do not
use this product when you are tired or distracted from the job at hand.

10.

CHECK FOR DAMAGED PARTS. Before using this product, carefully check that
it will operate properly and perform its intended function. Check for damaged parts
and any other conditions that may affect the operation of this product. Replace or
repair damaged or worn parts immediately.

11.

REPLACEMENT PARTS AND ACCESSORIES: When servicing, use only identical
replacement parts. Only use accessories intended for use with this product. Approved accessories are available from Harbor Freight Tools.

12.

MAINTAIN THIS PRODUCT WITH CARE. Keep this product clean and dry for
better and safer performance.

13.

MAINTENANCE: For your safety, service and maintenance should be performed
regularly by a qualified technician.

14.

USE THE RIGHT TOOL FOR THE JOB. Do not attempt to force small equipment
to do the work of larger industrial equipment. There are certain applications for
which this equipment was designed. It will do the job better and more safely at the
capacity for which it was intended. Do not modify this equipment, and do not use
this equipment for a purpose for which it was not intended.

15.

WARNING: The warnings, precautions, and instructions discussed in this manual
cannot cover all possible conditions and situations that may occur. The operator
must understand that common sense and caution are factors, which cannot be built
into this product, but must be supplied by the operator.

SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS
1.

TO AVOID PERSONAL INJURY AND/OR PROPERTY DAMAGE, DO NOT EXCEED
THE TRAILER’S MAXIMUM PAYLOAD CAPACITY OF 1,400 POUNDS.

BEFORE EACH USE, ALWAYS EXAMINE THE TRAILER FOR PROPER TIRE
(23) AIR PRESSURE, DAMAGED TAIL LIGHTS (25L, 25R), DAMAGED SIDE
RUNNING LIGHTS (26), LOOSE BOLTS AND NUTS, STRUCTURAL CRACKS,
BENDS, AND ANY OTHER CONDITION THAT MAY AFFECT ITS SAFE OPERATION. Do not use the Trailer even if minor damage appears.

NEVER ALLOW PEOPLE OR PETS TO RIDE ON THE TRAILER.

BEFORE EACH USE, ALWAYS ATTACH THE SAFETY CHAINS (10) OF THE
TRAILER TO THE TOWING VEHICLE. Make sure the Safety Chains are attached
to the towing vehicle with the same length for each side. Do not allow the Safety
Chains to drag on ground.

SKU 02575

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Page

ALWAYS CHECK TO MAKE SURE THE PAYLOAD BEING TRANSPORTED IS
PROPERLY AND SAFELY SECURED ON THE TRAILER. Load the Trailer evenly
from side to side with 60% of the load forward of the Axle (19).

MAKE SURE THE TOWING VEHICLE IS CAPABLE OF TOWING THE TRAILER
AND ITS PAYLOAD. Make sure the hitch on the towing vehicle is capable of towing the Trailer and its payload and has 1-7/8” hitch ball. Make sure hitch ball is
securely mounted. The towing capacity of the hitch is typically stamped on the
hitch drawbar.

MAKE SURE THE COUPLER (12) AND THE VEHICLE’S BALL HITCH (not included) ARE OF EQUAL MATING SIZE (1-7/8”) AND ARE RATED EQUAL TO
OR GREATER THAN THE WEIGHT OF THE TRAILER AND ITS PAYLOAD.

DO NOT EXCEED 45 MILES PER HOUR WHEN TOWING THE TRAILER. Excess
speed is an important cause of vehicle-trailer accidents.

THE TAIL LIGHT BULBS SUPPLIED WITH THIS TRAILER ARE FOR A 12 VOLT
DC ELECTRICAL SYSTEM ONLY. Do not attempt to power the Light Bulbs with
any other type or voltage electrical current.

10.

WHENEVER POSSIBLE, PARK THE TRAILER ON A FLAT, LEVEL, SOLID
GROUND/PAVED SURFACE AND CHOCK BOTH TIRES TO KEEP THE TRAILER
FROM ACCIDENTLY MOVING.

11.

TRAILER LICENSING NOTICE: Some states may consider this Trailer as a vehicle
requiring registration, licensing, and titling. Check with your State Department of
Motor Vehicles for information and guidance on registering, licensing, and titling
the Trailer.

UNPACKING
When unpacking, check to make sure all the parts shown on the Parts List near
the end of this manual are included. 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.

SKU 02575

For technical questions, please call 1-800-444-3353.

Page

ASSEMBLY INSTRUCTIONS
Note: For additional references to the parts listed below, refer to the Assembly Diagrams
near the end of this manual.
To Assemble the Tires, Wheels, and Axle:
1.

Insert one Hub (20) fully onto each end of the Axle (19).

Bearing Packing Instructions: Read the following instructions; failure
to read and obey all of the following instructions completely will void the
warranty and can result in damage to the trailer, property damage, or serious personal injury.
Whenever a hub is disassembled (if a hub on a new unit requires assembly or a hub
is disassembled for maintenance), the following procedure must be followed.
a. Using a suitable solvent, thoroughly clean the bearings and the rest of the parts in
the Hub assembly of all grease, dirt, metal shavings, or any other foreign object.
The parts must be cleaned even if they are new or appear clean.
b. Allow all pieces to dry completely.
c. Make sure that your hands are thoroughly clean and the bearing packer (not
included) is also thoroughly clean.
d. Place fresh, clean bearing grease in the packer.
e. With the grease-filled bearing packer in one hand and the bearing in the other,
press the bearing into the grease, forcing the grease inside the slots in the
bearing, continue doing this until every slot in the bearing is completely full of
grease.
f. Be careful not to get any dirt or debris on any part of the assembly while you
continue assembly.

Insert one Outer Bearing (21) into each Hub (20). Then, insert one 3/4” Flat Washer
(O) fully onto each end of the Axle (19).

Screw one Castle Nut (Q) fully onto each end of the Axle (19). NOTE: Do not
overtighten the Castle Nut. Make sure the Hub (20) turns freely. Then insert one
5/32” Cotter Pin (P) through each of the Castle Nuts, and bend each Cotter Pin to
secure the Castle Nut in place.

Insert one Dust Cap (22) onto each of the two Castle Nuts (Q). NOTE: A rubber
mallet (not included) may be required to firmly secure the Dust Caps onto the Castle
Nuts.

Align the four mounting holes in a Tire & Wheel Assembly (23) with the four Lug
Bolts on a Hub (20), and insert the Tire & Wheel Assembly onto the Hub. Firmly
secure the Tire & Wheel Assembly to the Hub, using four Wheel Nuts (S). Then,
repeat this Step for the remaining Tire & Wheel Assembly and Hub.

SKU 02575

For technical questions, please call 1-800-444-3353.

Page

To Assemble the Frame and Tongue:
1.

Position the Right Side Rail (1R) and Left Side Rail (1L) parallel and aligned with
one another. (See Figure A.)

Align the mounting hole located at each end of a Cross Member (2) with the mounting hole located in one end of the Right Side Rail (1R) and one end of the Left Side
Rail (1L). On each end insert one 3/8” x 7/8” Carriage Bolt (A) upward from the
underside of the aligned mounting holes, and secure the Cross Member to the
Right Side Rail and Left Side Rail with one Washer (C) and one Nut (B).
(See Figure A.)
FIGURE A
RIGHT SIDE RAIL (1R)

REAR CROSS MEMBER
(3)
CROSS MEMBER
(2)

CROSS MEMBER
(2)

RIGHT CONNECTING
RAIL (8)

LEFT SIDE RAIL (1L)
TOW BAR (9)
LEFT CONNECTING RAIL (7)

COUPLER
(12)
TO CONNECT COUPLER
TO TOW BAR USE:
BOLT (V)
SAFETY CHAIN
(10)

FOR ALL OTHER
CONNECTIONS USE:
BOLT (A)
WASHER (C)

NUT (B)
NUT (B)

Align the mounting hole located at each end of the remaining Cross Member (2)
with the mounting hole located in the center of the Right Side Rail (1R) and the
center of the Left Side Rail (1L). Insert one 3/8” x 7/8” Carriage Bolt (A) upward
from the underside of the aligned mounting holes in the Cross Member and Right
Side Rail, and secure the parts with one Washer (C) and one Nut (B). Repeat this
Step for the other end of the Cross Member and the Left Side Rail.
(See Figure A.)

SKU 02575

For technical questions, please call 1-800-444-3353.

Page

Align the mounting hole located at each end of the Rear Cross Member (3) with
the mounting hole located in the end of the Right Side Rail (1R) and the end of the
Left Side Rail (1L). On each end insert one 3/8” x 7/8” Carriage Bolt (A) upward
from the underside of the aligned mounting holes, and secure the Rear Cross
Member to the Right Side Rail and Left Side Rail with one Washer (C) and one Nut
(B). (See Figure A.)

Align the four mounting holes located at the middle and rear sections of the Tow
Bar (9) with the four mounting holes located in the middle section of each of the
two Cross Members (2). Insert four 3/8” x 7/8” Carriage Bolts (A) upward from the
underside of the aligned mounting holes, and secure the Tow Bar to the two Cross
Members with four Washers (C) and four Nuts (B). (See Figure A.)

Align the three mounting holes located in the Right Connecting Rail (8) with the
one mounting hole located in the Right Side Rail (1R), one mounting hole located
in the forward Cross Member (2), and one mounting hole located in the Tow Bar
(9). Insert three 3/8” x 7/8” Carriage Bolts (A) upward from the underside of the
aligned mounting holes, and secure the Right Connecting Rail to the Right Side
Rail, forward Cross Member, and Tow Bar, with three Washers (C) and three Nuts
(B). (See Figure A.)

Align the three mounting holes located in the Left Connecting Rail (7) with the
one mounting hole located in the Left Side Rail (1L), one mounting hole located
in the forward Cross Member (2), and one mounting hole located in the Tow Bar
(9). Insert three 3/8” x 7/8” Carriage Bolts (A) upward from the underside of the
aligned mounting holes, and secure the Left Connecting Rail to the Left Side Rail,
forward Cross Member, and Tow Bar, with three Washers (C) and three Nuts (B).
(See Figure A.)

Insert the Coupler (12) onto the forward end of the Tow Bar (9), and align the two
mounting holes in the Coupler with the two mounting holes in the Tow Bar. Secure the
Coupler to the Tow Bar, using two Bolts (V) and two Nuts (B). (See Figure A.)

To Attach the Springs, Tires, Wheels, and Axle to the Frame:
1.

Align the two mounting holes in a Front Spring Hanger (15F) with the two mounting
holes located in the forward section of the Left Side Rail (1L). Insert two 3/8” x 7/8”
Carriage Bolts (A) upward from the underside of the aligned mounting holes, and
secure the Front Spring Hanger to the Left Side Rail with two Washers (C) and two
Nuts (B).

Align the two mounting holes in the remaining Front Spring Hanger (15F) with the
two mounting holes located in the forward section of the Right Side Rail (1R). Insert two 3/8” x 7/8” Carriage Bolts (A) upward from the underside of the aligned
mounting holes, and secure the Front Spring Hanger to the Right Side Rail with two
Washers (C) and two Nuts (B).

SKU 02575

For technical questions, please call 1-800-444-3353.

Page

Align the two mounting holes in a Rear Spring Hanger (15R) with the two mounting
holes located in the rear section of the Left Side Rail (1L). Insert two 3/8” x 7/8”
Carriage Bolts (A) upward from the underside of the aligned mounting holes, and
secure the Rear Spring Hanger to the Left Side Rail with two Washers (C) and two
Nuts (B).

Align the two mounting holes in the remaining Rear Spring Hanger (15R) with the
two mounting holes located in the rear section of the Right Side Rail (1L). Insert two
3/8” x 7/8” Carriage Bolts (A) upward from the underside of the aligned mounting
holes, and secure the Rear Spring Hanger to the Right Side Rail with two Washers
(C) and two Nuts (B).

Align the mounting hole on the end of a Spring (18) with the mounting hole located
on the side of one of the pre-attached Front Spring Hangers (15F), and secure the
Spring to the Front Spring Hanger with one Bolt (N) and one Nut (B).

Insert the second Spring Bolt (N) underneath the curved edge at the rear of the
Spring (18) and through the mount hole of the Rear Spring Hanger (15R). Secure
with one Nut (E).

For the remaining Spring (18), Front Spring Hanger (15F), and Rear Spring Hanger
(15R), repeat Steps #5 and #6.

Align the center mounting hole of a Spring Plate (16) with the center mounting hole
of a pre-attached Spring (18), and secure the Spring Plate to the Spring with two
U Bolts and Nuts (U Bolts fit underneath the axles with threaded ends up). Repeat
this step on opposite side of Trailer.

Align the center mounting hole of the remaining Spring Plate (16) with the center
mounting hole of the remaining pre-attached Spring (18), and secure the Spring
Plate to the Spring with one Bolt (A), one Washer (C), and one Nut (B).

10.

With assistance, position the pre-assembled Tire, Wheel, and Axle Assembly under
the mid-section of the pre-assembled Frame of the Trailer.

11.

On the right side of the Trailer, insert two U-Bolts (17) upward, over the right end of
the Axle (19), and through the four mounting holes in the Spring Plate (16). Then,
secure the right end of the Axle to the Spring (18) by tightening four Washers (C)
and four Nuts (B) onto the two U-Bolts.

12.

On the left side of the Trailer, insert the remaining two U-Bolts (17) upward, over the
left end of the Axle (19), and through the four mounting holes in the Spring Plate (16).
Then, secure the left end of the Axle to the Spring (18) by tightening four Washers
(C) and four Nuts (B) onto the two U-Bolts.

REV 05/03

SKU 02575

For technical questions, please call 1-800-444-3353.

Page

To Attach the Fenders:
1.

Align the two mounting holes in a Fender (13) with the two mounting holes located
in the side, mid-section of the Left Side Rail (1L). Then secure the Fender to the
Left Side Rail with two Bolts (A), two Washers (C), and two Nuts (B).

Align the two mounting holes in the remaining Fender (13) with the two mounting
holes located in the side, mid-section of the Right Side Rail (1R). Then secure the
Fender to the Right Side Rail with two Bolts (A), two Washers (C), and two Nuts
(B).

To Attach the Side Running Lights:
1.

Align the two mounting holes in a Side Running Light (26) with the two mounting
holes located in the side, forward section of the Left Side Rail (1L). Then, secure
the Side Running Light to the Left Side Rail with two Self-Tapping Screws (J).

Align the two mounting holes in the remaining Side Running Light (26) with the
two mounting holes located in the side, forward section of the Right Side Rail (1R).
Then, secure the Side Running Light to the Right Side Rail with two Self-Tapping
Screws (J).

To Attach the Tail Light Bracket and License Plate Bracket:
1.

Align two of the mounting holes in a Tail Light Bracket (24) with the two mounting
holes located in the side, rear section of the Left Side Rail (1L). Then, secure the
Tail Light Bracket to the Left Side Rail with two Bolts (A), two Washers (C), and two
Nuts (B).

Align two of the mounting holes in the remaining Tail Light Bracket (24) with the two
mounting holes located in the side, rear section of the Right Side Rail (1R). Then,
secure the Tail Light Bracket to the Right Side Rail with two Bolts (A), two Washers
(C), and two Nuts (B).

To Attach the Tail Lights:
1.

See Wiring Diagram on page 15. Insert the two threaded mounting bolts of the
Left Tail Light (25L) through the mounting holes located in the License Plate Bracket
(30) and Tail Light Bracket (24). Then, secure the Left Tail Light with light nuts.

Insert the two threaded mounting bolts of the Right Tail Light (25R) through the
mounting holes located in the Tail Light Bracket (24) which was pre-assembled on
the Right Side Rail (1R). Then, secure the Left Tail Light with light nuts.

SKU 02575

For technical questions, please call 1-800-444-3353.

Page 10

FIGURE B

BOTTOM VIEW
LEFT SIDE RAIL (1L)

LEFT TAIL LIGHT (25L)

LEFT CONNECTING RAIL (7)
WIRING
HARNESS

RIGHT CONNECTING RAIL (8)
USE HEAVY GAUGE, NYLON,
TIE STRIPS (NOT INCLUDED) TO
ATTACH WIRING HARNESS TO
UNDERSIDE OF FRAME.

RIGHT SIDE RAIL (1R)

RIGHT TAIL LIGHT (25R)

Use heavy gauge, nylon, tie strips (not included) to attach the wiring harnesses of
the Left and Right Tail Lights (25L, 25R) to the underside of the Frame and Tongue
Assemblies. (See Figure B.)

To Attach the Trailer Beds:
1.

Align the four mounting holes of a Trailer Bed (X) with the two mounting holes in
the Left Side Rail (1L) and two mounting holes in the Right Side Rail (1R). Secure
the Trailer Bed to the Left and Right Side Rails with four Bolts (A), four Washers
(C), and four Nuts (B).

Align the four mounting holes of the remaining Trailer Bed (X) with the two mounting holes in the Left Side Rail (1L) and two mounting holes in the Right Side Rail
(1R). Secure the Trailer Bed to the Left and Right Side Rails with four Bolts (A),
four Washers (C), and four Nuts (B).

Insert three Bolts (A) between the two pre-assembled Trailer Beds (X) and through
the three mounting holes in the Cross Member (2). Make sure the heads of the
Bolts overlap the edges of each of the Trailer Beds. Then firmly tighten the Bolts
with four Washers (C) and four Nuts (B).

The A-Tongue Trailer is now completely assembled and ready for use.

REV 03d; 05f

SKU 02575

For technical questions, please call 1-800-444-3353.

Page 11

OPERATING INSTRUCTIONS
1.

Only use a 1-7/8” ball hitch (not included) on the towing vehicle. (See Figure C.)

Temporarily remove the “R” Pin (L) and Safety
Pin (K). Then, pull up on the Trigger and lift up
on the Handle. (See Figure C.)

NOTE: To reduce friction between the hitch ball
and Coupler (12), apply a layer of heavy weight
grease over the hitch ball. (See Figure C.)

CAUTION
Care must be taken when backing up
the Trailer; only back up the trailer on a
straight path. If the Trailer is allowed to turn
off the straight path while backing up, the Trailer
could jackknife, causing severe damage to the
trailer and to the towing vehicle.

TRIGGER

“R” PIN (L)

COUPLER (12)

HANDLE
SAFETY PIN (K)

ADJUSTMENT NUT
1-7/8” HITCH BALL
(NOT INCLUDED)

FIGURE C
4.

VEHICLE HITCH
(NOT INCLUDED)

With assistance, place the Coupler (12) over the vehicle’s hitch ball and pull back on
the Trigger and push down on the Handle until the Trigger locks in the slot. Pull up
and down on the Coupler to make sure the hitch ball is fitting snugly in the Coupler.
There should be no play between the hitch ball and Coupler.
IMPORTANT - If there is play, tighten the Adjustment Nut until no play is present:
After unlocking the Handle, the Nut retaining plate (holding the adjusting nut in
place) needs to be pressed back while the Nut is tightened. After Nut is tightened, the retaining plate needs to fit in place against the flats of the Nut
to prevent it from moving. This adjustment should be done by 2 people. If
the Adjustment Nut is too tight, the Handle will not lock.
After the Adjustment Nut is properly adjusted, pull back on the Trigger and push
down on the Handle until the Trigger locks in the slot. Pull up on Handle firmly to
make sure the Trigger is locked in place and the Handle cannot move. Replace the
Safety Pin and “R” Pin. (See Figure C.)

Know how to properly control the towing vehicle-Trailer combination on the highway
under all conditions. The loaded weight of the Trailer will increase the braking and
stopping distances appreciably.

When towing the Trailer over long distances stop and check the tightness of all connections and Tail Lights (25L, 25R) at least every 100 miles.
REV 05f

SKU 02575

For technical questions, please call 1-800-444-3353.

Page 12

Carry extra bulbs and fuses if towing the Trailer at night over long distances. Carry
emergency flares, and fire extinguisher, if required for operation in your state.

Tire information
Tire Terminology Glossary
• Accessory weight means- the combined weight of automatic transmission, power steering, power
brakes, power windows, power seats, radio, and heater, to the extent that these items are available as
factory-installed equipment.
• Carcass means- the tire structure except for the tread which provides the major portion of the tire’s
capability to deflect in response to the vertical loads and tractive forces that the tire transmits from the
roadway to the non-pneumatic rim, the wheel center member, or the vehicle and which attaches to the
vehicle or attaches, either integrally or separably, to the wheel center member or non-pneumatic rim.
• Carcass separation means- the pulling away of the carcass from the non-pneumatic rim or wheel
center member.
• Chunking means- the breaking away of pieces of the carcass or tread.
• Cracking means- any parting within the carcass, tread, or any components that connect the tire to the
wheel center member.
• Curb weight means- the weight of a motor vehicle with standard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so equipped, air conditioning and additional weight optional
engine.
• Load rating means- the maximum load a tire is rated to carry.
• Maximum loaded vehicle weight means- the sum of:
a. Curb weight;
b. Accessory weight;
c. Vehicle capacity weight; and
d. Production options weight.
• Maximum tire width means- the greater of either the linear distance between the exterior edges of the
carcass or the linear distance between the exterior edges of the tread, both being measured parallel to
the rolling axis of the tire.
• Normal occupant weight means- 68 kilograms times the number of occupants.
• Occupant distribution means- distribution of occupants in a vehicle.
• Production options weight means- the combined weight of those installed regular production options
weighing over 2.3 kilograms in excess of those standard items which they replace, not previously considered in curb weight or accessory weight, including heavy duty brakes, ride levelers, roof rack, heavy
duty battery, and special trim.
• Tread means- that portion of the tire that comes in contact with the road.
• Tread separation means- pulling away of the tread from the carcass.
• Vehicle capacity weight means- the rated cargo and luggage load plus 68 kilograms times the vehicle’s
designated seating capacity.
• Vehicle maximum load on the tire means- that load on an individual tire that is determined by distributing to each axle its share of the maximum loaded vehicle weight and dividing by two.
• Vehicle normal load on the tire means- that load on an individual tire that is determined by distributing
to each axle its share of the curb weight, accessory weight, and normal occupant weight and dividing
by 2.

SKU 02575

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Page 13

Tire Markings
Inner diameter
in inches
Section width
in inches

Load index and
Speed rating*

European tire
certificate*

71M

2
0-1

X X X XX

Manufact
u

XX
TX
DO

U.S. DOT tire
identification
number

Lo
X P ad r
. R an
.
Tr ge _
ea _
d M
ar

a
i

Maximum
load rating

r
e

Maximum
permissible
inflation
pressure

Trailer
tire

Xat XXlPx. plies
bs al
r XX l ide w
ex. loadplXies / s
la ea x

.
d
PS.I..R
Col lon
Ny

Tire ply
composition
and materials
used

*Information not required by U.S. DOT

• Section width- This number gives the width of the tire in inches. The larger the number, the wider the
tire. (The markings on the example tire diagram show 4.80. The markings on your tire may differ.)
• Inner diameter- This number gives the inner diameter of the tire in inches. This is also the rim diameter
in inches. (The markings on the example tire diagram show 12. The markings on your tire may differ.)
• U.S. DOT tire identification number- This begins with the letters “DOT” and indicates that the tire meets
all federal standards. The next two numbers or letters are the plant code where it was manufactured, and
the last four numbers represent the week and year that the tire was built. For example, the numbers 2107
mean the 21st week of 2007. Any other numbers used are marketing codes used at the manufacturer’s
discretion. This information is used to contact consumers if a tire defect requires a recall.
• Maximum Load Rating- This number indicates the maximum load in kilograms and pounds that can
be carried by the tire.

Load Index Rating Codes
Code

Pounds

Code

Pounds

Code

Pounds

Code

Pounds

Code

Pounds

71
72
73
74
75
76
77
78

761
783
805
827
853
882
908
937

79
80
81
82
83
84
85
86

963
992
1,019
1,047
1,074
1,102
1,135
1,168

87
88
89
90
91
92
93
94

1,201
1,235
1,279
1,323
1,356
1,389
1,433
1,477

95
96
97
98
99
100
101
102

1,521
1,565
1,609
1,653
1,709
1,764
1,819
1,874

103
104
105
106
107
108
109
110

1,929
1,984
2,039
2,094
2,149
2,205
2,271
2,337

• Load index- This is a measurement of how much weight each tire can support. See chart above. (The
markings on the example tire diagram show 71. The markings on your tire may differ.) Note: You may
not find this information on all tires because it is not required by law.

SKU 02575

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Page 14

• Speed Rating- The speed rating denotes the speed at which a tire is designed to be driven for extended periods of time. This does not indicate that the
Tire Speed Rating Codes
vehicle or rims can safely reach or maintain that speed.
Code MPH Code MPH Code MPH
These ratings are listed to the right. (The markings on
F
50
N
87
U
124
the example tire diagram show M. The markings on your
G
56
P
94
H
130
tire may differ.) Note: You may not find this information
J
62
Q
100
V
149
K
68
R
106
Z
149
on all tires because it is not required by law.
L

112

168

• Tire Ply Composition and Materials Used- The numM
81
T
118
Y
186
ber of plies indicates the number of layers of rubbercoated fabric in the tire. In general, the greater the number of plies, the more weight a tire can support.
Tire manufacturers also must indicate the materials in the tire, which include steel, nylon, polyester,
and others.
• Maximum Permissible Inflation Pressure- This number is the greatest amount of air pressure that
should ever be put in the tire under normal driving conditions.

Tire Inflation and Load Limit
Tire and Loading Information Placard

Tire and loading information
The weight of cargo should never exceed 635 kg or 1400 lb.
n
TiO
ma
Or 1400 lb.
er’s
g inf kg or

din

e and

Tir
ht

weig

lOa

exce

635

r
n
neve
aTiO
ld
infl
re
d Tire ssu
Psi
Pre
60
kPa,
414

o shou

carg

COl

Tire
inal
Orig size
0-12
/4.0
4.80

The

Own fOr
see ual nal .
man iTiO TiOn
add rma
infO

Original Tire
size

Cold Tire inflation
Pressure

4.80/4.00-12

414 kPa, 60 PSI

See owner’s
manual for
additional
information.

Tire and Loading Information Placard Location
The Tire and Loading Information Placard displays the cold tire inflation pressure
and the load limit for this vehicle. See the Tire Care section starting on the following page
for an explanation of tire pressure and see the Vehicle Load Limit section following that for
an explanation of load limit.

SKU 02575

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Page 15

Tire care
Checking Tire Pressure
Note: Underinflated tires can decrease handling, stopping performance, traction, tire life,
and load-carrying capability, in addition to causing other negative and hazardous
effects, including tire failure. Overinflated tires are at greater risk of an impact break,
where the tread and casing break when striking a hard edge, often opening a huge
gash across the tread. Incorrect inflation pressure also increases tires wear rate.
Therefore, it is important to keep tires inflated properly.
Check all tires’ pressure at least monthly, due to the following factors:
• Most tires naturally lose air gradually.
• Tires can suddenly lose air if the tire strikes a pothole, curb, or other object.
• It is usually not possible to determine underinflation of radial tires by visual inspection.
This vehicle has 60 PSI recommended cold tire inflation pressure. The term “cold”
in this manual does not refer to the temperature outside, but it refers to the fact that a tire
that has not been driven for a period is cooler (and therefore has lower pressure) than a
tire that has been driven on. Tires heat up while being driven on. To check (or fill to) a
tire’s cold inflation, the tire must have not been driven for more than a mile or two for at
least three hours. If you check a tires pressure when it is not “cold”, the pressure will appear higher than the actual cold tire inflation.

Steps for Maintaining Proper Tire Pressure
1.

Locate the recommended tire pressure on the vehicle’s tire information placard,
certification label, or in the owner’s manual. This trailer has 60 PSI recommended
cold tire inflation pressure.

Measure and record the tire pressure of all tires.

If the tire pressure is too high in any of the tires and the tires have not been driven
for at least three hours, slowly release air by gently pressing on the tire valve stem
with the edge of your tire gauge until you get to the correct pressure. If the vehicle
have been driven within the past three hours and the tire pressure is too high on any
tires, then recheck the pressure once the tires have been allowed to sit motionless
for at least three hours.

If the tire pressure is too low, note the difference between the measured tire pressure and the correct tire pressure. These “missing” pounds of pressure are what
you will need to add.

At a service station, add the missing pounds of air pressure to each tire that is
underinflated.

SKU 02575

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Page 16

Check all the tires to make sure they have the same air pressure.

If the tires’ pressure was not measured “cold”, then the pressure should be rechecked
with the tires cold as soon as possible.

Tire Size
To maintain safety, only purchase new tires of the same size as the original tires.
Look at the Tire and Loading Information Placard, the Specifications Chart in this manual,
or the sidewall of the tire being replaced. If you have any doubt about selecting the correct
size, consult a tire dealer.

Tire Tread
The tire tread provides traction that prevents your vehicle from slipping, especially
if the road is wet or icy. Tires are unsafe and should be replaced when the tread is worn
down to 1/16”. Measure tread depth using a tread depth indicator (not included).

Tire Rotation
Every 5,000 miles the left and right tires should be switched. This will cause the
tires to wear more evenly and last longer.

Tire Balance and Alignment
The tires need to be balanced to prevent vibration when driving. This involves attaching small weights to the rim to offset small differences in rim and tire weight. The tires
also need to be aligned properly. Alignment is the orientation of the tires to the road surface
and their being parallel. This helps the tires to wear evenly, and provide better traction.
Both tire balance and alignment require specialized equipment that is not provided with
this vehicle.

Tire Repair
To properly repair a punctured tire, the hole needs to be properly plugged and
patched from the inside of the tire. Tread punctures can be repaired if they are not too
large. Sidewall punctures should not be repaired, the tire needs to be replaced if the
sidewall is damaged. Tires should be removed from the rim to be inspected before being
plugged and patched. A qualified mechanic should remove the tire from the rim, perform
the repair, and remount the tire.

SKU 02575

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Page 17

Vehicle Load Limit
Steps for Determining Correct Load Limit
1.

Locate the statement “The weight of cargo should never exceed XXX pounds” on
your vehicle’s placard.

That figure equals the available amount of cargo and luggage load capacity.

Determine the combined weight of luggage and cargo being loaded on the vehicle.
That weight may not safely exceed the available cargo and luggage load capacity.

If the trailer’s load exceeds the cargo and luggage load capacity, then the trailer
be unsafe resulting in hazardous effects, such as: Trailer’s tires will not be able to
maintain traction properly, and stopping distance will be increased significantly.

INSPECTION, MAINTENANCE, AND CLEANING
1.

BEFORE EACH USE, inspect the general condition of the Trailer. Check for loose
Bolts and Nuts, misalignment or binding of moving parts, cracked, bent, or broken
parts, excessively worn Safety Chain , damaged Tail Lights/Side Running Lights/
Wiring Harness, loose Lug Nuts, loose Hitch connection, 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.

BEFORE EACH USE, check the Tires according to the instructions on the previous
pages.

Before every use and At 500 MILE intervals during Every trip,
check and tighten the Tire Lug Nuts. Torque from 85 to 90 ft-lb.

EVERY 2,000 TO 3,000 MILES OF USE, lubricate the Hub Assemblies with a heavy
weight bearing grease. Follow the Bearing Packing Instructions as explained
on page 6 of this manual. After each Hub Assembly is reassembled, tighten the
Castle Nut until the wheel starts spinning with slight resistance. Loosen the Castle
Nut about 1/6 turn from this point. Insert a new Cotter Pin through the Castle Nut
and the hole in the axle. Bend the Pin back, locking it and the Nut in place.

SKU 02575

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Page 18

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.

Note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.

Parts List and DIAGRAMS
Parts List
Part

Description

1L
1R
2
3
7
8
9
10
12
13
15F
15R
16
17
18
19
20
21
22
23
24

Left Side Rail
Right Side Rail
Cross Member
Rear Cross Member
Left Connecting Rail
Right Connecting Rail
Tow Bar
Safety Chain
Coupler (1-7/8” x 2-1/2”)
Fender
Front Spring Hanger
Rear Spring Hanger
Spring Plate
U-Bolt
Spring
Axle
Hub
Outer Bearing
Dust Cap
Tire & Wheel Assembly
Tail Light Bracket

SKU 02575

Qty.

Part

1
1
2
1
1
1
1
1
1
2
2
2
2
4
2
1
2
2
2
2
2

25L
25R
26
30
A
B
C
E
J
K
L
M
N
O
P
Q
R
S
T
V
X

Description
Left Tail Light
Right Tail Light
Side Running Light
License Plate Bracket
Carriage Bolt (3/8” x 7/8”)
Nut (3/8”)
Flat Washer (3/8”)
Nut (9/16”)
Self Tapping Screw (4mm)
Safety Pin
R Pin
Bolt (9/16” x 3-1/4”)
Bolt (3/8” x 3”)
Flat Washer (3/4”)
Cotter Pin (5/32”)
Castle Nut
Grease Fitting
Wheel Nut
Self Tapping Screw (1/4”)
Bolt (3/8” x 3-1/2”)
Trailer Bed

For technical questions, please call 1-800-444-3353.

Qty.
1
1
2
1
49
61
53
2
4
1
1
2
2
2
2
2
2
8
1
2
2

Page 19

Assembly Diagram A

N, B

SKU 02575

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Page 20

Assembly Diagram B

TRAILER BED (X)

BOLT
(A)

WASHER (C)
NUT (B)

SKU 02575

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Page 21

Wiring Diagram for Lights

Note: Some trailer tail lights will have two leads instead of three. They connect to the harness leads the same way; brown to brown, color to color.

REV 03d, 06e

SKU 02575

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Page 22

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

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Page 23

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