JLG Triple-L 248 Use and care manual

Triple-L™ Trailers
3121224
December 21, 2010
Operation & Safety and
Service Manual
ANSI
®

FOREWORD
3121224 – Triple-L-Trailer – a
FOREWORD
This manual is a very important tool! Keep it with the machine at all times.
The purpose of this manual is to provide owners, users, operators, lessors, and lessees with the precautions
and operating procedures essential for the safe and proper trailer operation for its intended purpose. It is impor-
tant to stress proper trailer usage at all times. All information in this manual must be read and understood
before any attempt is made to operate the trailer.
Because the manufacturer has no direct control over trailer operation and application, proper safety practices
are the responsibility of the owners, users, operators, lessors, and lessees.
All instructions in this manual are based upon the use of the trailer under proper operating conditions, with no
deviations from the original design. Any alteration or modification of the trailer is strictly forbidden without writ-
ten approval from JLG Industries, Inc.
Due to continuous product improvements, JLG Industries, Inc. reserves the right to make specification changes
without prior notification. Contact JLG Industries, Inc. for updated information.

FOREWORD
b– Triple-L-Trailer – 3121224
SAFETY ALERT SYMBOLS AND SAFETY SIGNAL WORDS
This is the Safety Alert Symbol. It is used to alert you to the
potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death
The Safety Alert Symbol will be used with the appropriate Safety Signal Word of “DANGER” “WARNING” or “CAUTION” to
a potential hazard and designate a level of seriousness. The Safety Signal Words are inserted throughout this manual in
Black/White. On the machine, the Safety Signal Words will have either a Red, Orange, or Yellow background as part of a
safety sign or decal. The “DANGER”, “WARNING”, and “CAUTION” Safety Signal Words, definitions, and associated colors
are as follows:
INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, WILL RESULT IN SERIOUS INJURY OR DEATH. THIS
SIGNAL WORD IS USED IN THE MOST EXTREME CASES. WHEN
INSTALLED ON THE, TRAILER. THIS SIGNAL WORD WILL HAVE A
RED BACKGROUND AS PART OF A DECAL.
INDICATES A POTENTIALITY HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, COULD RESULT IN SERIOUS INJURY OR DEATH.
WHEN INSTALLED ON THE TRAILER, THIS SIGNAL WORD WILL
HAVE AN ORANGE BACKGROUND AS PART OF A DECAL.
INDICATES A POTENTIALITY HAZARDOUS SITUATION WHICH IF
NOT AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY. IT
MAY ALSO BE USED TO ALERT AGAINST UNSAFE PRACTICES.
WHEN INSTALLED ON THE TRAILER, THIS SIGNAL WORD WILL
HAVE A YELLOW BACKGROUND AS PART OF A DECAL.
INDICATES INFORMATION OR A COMPANY POLICY THAT
RELATES DIRECTLY OR INDIRECTLY TO THE SAFETY OF PERSON-
NEL OR PROTECTION OF PROPERTY.
The “IMPORTANT” Safety Signal Word may also appear in this manual or on the machine. This Safety Signal Word typically
will not appear with the Safety Alert Symbol, but contains important information that must be followed for safe and proper
operation, The “IMPORTANT” Safety Signal Word definition and associated color is as follows.

FOREWORD
3121224 – Triple-L-Trailer – c
ALL SAFETY-RELATED BULLETINS MUST BE ACCOMPLISHED ON THIS PRODUCT. JLG INDUSTRIES, INC. MAY HAVE ISSUED SAFETY-
RELATED BULLETINS FOR THIS JLG PRODUCT. CONTACT JLG INDUSTRIES, INC. OR THE LOCAL AUTHORIZED JLG DEALER FOR
INFORMATION REGARDING SAFETY-RELATED BULLETINS WHICH MAY HAVE BEEN ISSUED FOR THIS PRODUCT.
FOR THE PURPOSE OF RECEIVING SAFETY-RELATED BULLETINS, IT IS IMPORTANT THAT THE CURRENT OWNER OF THIS UNIT
ENSURES JLG INDUSTRIES, INC. HAS UPDATED OWNERSHIP INFORMATION. CONTACT JLG INDUSTRIES, INC. TO ENSURE THAT THE
CURRENT OWNER RECORDS ARE UPDATED AND ACCURATE.
JLG INDUSTRIES, INC. MUST BE NOTIFIED IMMEDIATELY IN ALL INSTANCES WHERE JLG PRODUCTS HAVE BEEN INVOLVED IN AN
ACCIDENT INVOLVING BODILY INJURY OR DEATH OF PERSONNEL OR WHEN SUBSTANTIAL DAMAGE HAS OCCURRED TO PERSONAL
PROPERTY OR THE JLG PRODUCT.
FOR :
•Accident Reporting
•Product Safety Publications
•Current Owner Updates
•Questions Regarding Product Safety
•Standards and Regulations Compliance Information
•Questions Regarding Special Product Applications
•Questions Regarding Product Modifications
CONTACT :
Product Safety and Reliability Department
JLG Industries, Inc.
1 JLG Drive
McConnellsburg, PA 17233
Toll Free: 877-JLG-SAFE
877-554-7233
E-mail: [email protected]

FOREWORD
d– Triple-L-Trailer – 3121224
TRAILER IDENTIFICATION
TRAILER NUMBER MODEL NUMBER SERIAL NUMBER VIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12

NEW PRODUCT WARRANTY
3121224 – Triple-L-Trailer – e
NEW PRODUCT WARRANTY
1. WARRANTY. JLG Industries, Inc. (“Manufacturer”)
warrants each new product made by it to be free
from defects in material or workmanship for twelve
months from the date of initial sale, lease, rental, or
other disposition of such product. Manufacturer fur-
ther warrants the structural elements of each new
product made by it, as defined in its then current
warranty policies and procedures, to be free from
defects in material or workmanship for one year
from the date of initial sale, lease, rental or other dis-
position of such product. Manufacturer agrees only
to repair or replace at its own expense, F.O.B. the
place or places of manufacturer, any part or parts of
the product found to be defective in material or
workmanship, provided Manufacturer is notified of
such defect or defects within the applicable warranty
period and given a reasonable time to correct the
defect. In no case shall any warranty extend to
defects in materials, components, or services fur-
nished by third parties or to the erection or installa-
tion of the product performed by third parties.
Defects caused by chemical action or the presence
of abrasive materials and defects arising following
the operation beyond rated capacity or the improper
use or application of any products shall not be con-
sidered defects within the scope of the above men-
tioned warranty. If any repairs or alterations are
made or any parts are replaced during the periods
covered by any warranty above mentioned by other
than an authorized Manufacturer’s Distributor in
accordance with authorized Manufacturer’s service
manuals or with other than parts, accessories, or
attachments authorized by Manufacturer for use in
its products, customer shall pay for such repairs or
parts without recourse against Manufacturer, and
Manufacturer shall be relieved of responsibility for
fulfillment of the above mentioned warranty with
respect to parts or components for all repairs, alter-
ations, or replacements so made. Manufacturer’s
obligations under this warranty shall at all times be
subject to its then current warranty policies and pro-
cedures. The above mentioned warranty shall not
apply to replacement or service parts made by and
sold by Manufacturer, with any obligation of the
Manufacturer to such parts governed solely by Man-
ufacturer’s then current warranty policies and proce-
dures.
2. DISCLAIMER AS TO CONSEQUENTIAL OR SPE-
CIAL DAMAGES. Under no circumstances shall
Manufacturer be liable for any consequential or spe-
cial damages which any person firm, corporation, or
other entity may suffer or claim to suffer or incur or
claim to incur as a result of any defect in the product
or in any correction or alteration thereof made or fur-
nished by Manufacturer or others. “Consequential”
or “special damages” as used herein includes but is
not limited to costs of transportation, lost sales, lost
orders, lost profits, lost income, increased overhead,
labor and material costs, and costs of manufacturing
variances and operational inefficiencies.
3. MAXIMUM LIABILITY. The maximum liability of
Manufacturer under the exclusive warranty set forth
herein shall be the amount paid to Manufacturer with
respect to the product to which such warranty
applies.
4. EXCLUSIVE AND ENTIRE WARRANTY. This war-
ranty constitutes Manufacturer’s entire warranty as
to the product and it is expressly agreed that the
remedies of customer and those claiming under
customer as stated in this warranty are exclusive.
Manufacturer does not assume (and has not autho-
rized any other person to assume on its behalf) any
other warranty or liability in connection with any
product covered by this warranty.
NOTE: Manufacturer expressly disclaims any and all other
warranties of any kind whatsoever as to the product
furnished hereunder, including but not limited to
express or implied warranties as to merchantibility,
fitness for particular purposes sold, description or
quality of the product furnished hereunder.
5. NOTICE OF OCCURRENCE. This warranty shall
be void if, upon the occurrence of any incident
involving any product made by Manufacturer and
resulting in any personal injury or property damage,
customer shall fail to notify Manufacturer within 48
hours of such occurrence or permit Manufacturer
and its representatives to have immediate access to
such product and all records of or within the control
of customer relating to the product and occur-
rence.
6. LIMITATION OF LIABILITY. The limitation of liability
provisions herein shall apply to any and all claims or
suits brought against Manufacturer including any
claim based upon negligence, breach of contract,
breach of warranty, strict liability, or any other legal
theories upon which liability may be asserted
against Manufacturer.
NOTE: Manufacturer may at any time amend the foregoing
form of warranty without prior notice.

NEW PRODUCT WARRANTY
f– Triple-L-Trailer – 3121224
REVISION LOG
Original Issue - May 23, 2003
Revised - August 7, 2003
Revised - March 3, 2004
Revised September 30, 2004 (Edited to 0010598 Rev 7, 0010599 Rev 9, 0010600 Rev 6, 0010601Rev 9,
0010602 Rev 10)
Revised - October 4, 2004
Revised - February 25, 2005
Revised - June 27, 2005
Revised - August 22, 2005
Revised - May 24, 2006
Revised - August 28, 2006
Revised - December 5, 2007
Revised - January 17, 2008
Revised - December 21, 2010

3121224 – JLG Lift – i
TABLE OF CONTENTS
TABLE OF CONTENTS
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .a
New Product Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .e
SECTION 1 - SAFETY PRECAUTIONS
1.1 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.2 Local and National Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.3 Major Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.4 Reporting Safety Defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
1.5 Safety Warning Labels on Your Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
SECTION 2 - TRAILER OPERATION
2.1 Trailer Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2 Trailer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
2.3 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
2.4 Coupler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
2.5 Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
2.6 Battery (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.7 Deck Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.8 Tow Vehicle And Hitch Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
2.9 Coupling and Uncoupling the Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
2.10 Loading the Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
2.11 Lift Tie Down Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
2.12 Towing Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
2.13 Pre-Tow Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
2.14 Breaking-in a New Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17
SECTION 3 - ACCESSORIES
3.1 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.2 Scissor Lift chocks (If Equipped) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
SECTION 4 - SERVICE AND MAINTENANCE
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.2 Inspections, Service & Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.3 Inspection and Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
4.4 Bleeding Surge Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10
4.5 Trailer Connection to Tow Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
4.6 Tongue Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
4.7 Lights and Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
4.8 Trailer Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
4.9 Wheel Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
4.10 Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
4.11 Deck Bearing Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15
4.12 Tire and Wheel Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
4.13 Unsealed Bearings (Hubs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19

ii – JLG Lift – 3121224
TABLE OF CONTENTS (Continued)
LIST OF FIGURES
FIGURE NO. TITLE PAGE NO.
1-1. VIN Label & Tire Information Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1-2. Decal Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
2-1. Trailer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2-2. Vehicle Identification Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
2-3. Coupler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2-4. Lift Tie Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
3-1. Battery Charger Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3-2. Tie Down Attach Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
3-3. Chock Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
4-1. Jacking Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
4-2. Hydraulic Cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4-3. Hydraulic Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4-4. 12 Volt Motor/Pump Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4-5. Electric Brakes with Parking Brake Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4-6. Hydraulic Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
4-7. Trailer Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
4-8. Trailer Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4-9. Dual, Quadra Spring Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
4-10. Flex Ride Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
4-11. Suspension Camber Setting (Fixed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
4-12. Tire Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
LIST OF TABLES
TABLE NO. TITLE PAGE NO.
1-1 Decal Location Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
2-1 Trailer Model Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2-2 Production Option and Accessory Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
3-1 Chock Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
4-1 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4-2 Motor/Pump Amperage Draw (No Load in Trailer). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4-3 Tire Inflation Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
4-4 Tire Wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
4-5 Wheel Torque Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

SECTION 1 - SAFETY PRECAUTIONS
3121224 – Triple-L-Trailer – 1-1
SECTION 1. SAFETY PRECAUTIONS
1.1 SAFETY INFORMATION
Safety Information, Alert Symbols, and
Signal Words
An owner’s manual that provides general trailer informa-
tion cannot cover all of the specific details necessary for
the proper combination of every trailer, tow vehicle and
hitch. Therefore, you must read, understand and follow
the instructions given by the tow vehicle and trailer hitch
manufacturers, as well as the instructions in this manual.
Triple-L™ Trailers are built with components produced by
various manufacturers. Some of these items have sepa-
rate instruction manuals that were originally shipped with
the product. Where this manual indicates that you should
read another manual, and you do not have that manual,
call JLG to obtain a copy.
The safety information in this manual is denoted by the
safety alert symbols and signal words listed below:
INDICATES AN IMMINENTLY HAZARDOUS SITUATION. IF NOT
AVOIDED, WILL RESULT IN SERIOUS INJURY OR DEATH. THIS
DECAL WILL HAVE A RED BACKGROUND.
INDICATES A POTENTIALLY HAZARDOUS SITUATION. IF NOT
AVOIDED, COULD RESULT IN SERIOUS INJURY OR DEATH. THIS
DECAL WILL HAVE AN ORANGE BACKGROUND.
INDICATES A POTENTIALLY HAZARDOUS SITUATION. IF NOT
AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY. IT MAY
ALSO ALERT AGAINST UNSAFE PRACTICES. THIS DECAL WILL
HAVE A YELLOW BACKGROUND.
INDICATES PROCEDURES ESSENTIAL FOR SAFE OPERATION.
THIS DECAL WILL HAVE A GREEN BACKGROUND.
1.2 LOCAL AND NATIONAL REGULATIONS
In many regions, a trailer is considered a motor vehicle. As
such, there are regulations (height, width, brakes etc.) that
must be followed by the owner and operator. It is the
responsibility of the trailer owner and operator to deter-
mine which regulations apply and to comply with these
requirements.
1.3 MAJOR HAZARDS
Safe and proper usage of the trailer is essential to avoid
accidents. Unsafe use; separation of trailer from tow vehi-
cle; and loss of control of the trailer or trailer/tow vehicle
combination can result in death or serious injury. Com-
mon causes for trailer accidents include:
a. Driving too fast for conditions
b. Failure to adjust handling while towing a trailer
c. Trailer improperly coupled to the hitch
d. Incorrect use of safety chains
e. Incorrect use of breakaway brake
f. Mismatch of trailer and hitch
g. Unsafe tires, lug nuts or wheels
h. Overload
i. Unsafe load distribution
j. Shifting cargo
k. Inappropriate cargo
l. Inoperable brakes, lights or mirrors
m. Modifying the trailer
n. Inadequate tow vehicle or towing hitch
o. Not properly maintaining the trailer structure.
Driving too Fast for Conditions
With ideal road conditions, the maximum speed when
safely towing a trailer is 55 mph. If you drive too fast, the
trailer tires will overheat and possibly blowout. As your
speed increases, you are more likely to suddenly lose
control. Never exceed 55 mph while towing the trailer.
DECREASE YOUR SPEED AS ROAD, WEATHER AND LIGHTING
CONDITIONS DETERIORATE.
Failure to Adjust Handling While Towing a
Trailer
When towing a trailer, your tow vehicle will have
decreased acceleration, increased stopping distance, and
increased turning radius (which means you must make
wider turns to keep from hitting curbs, vehicles, and any-
thing else that is on the inside corner). In addition, you will
need a longer distance to pass, due to slower acceleration
and increased length.
Be alert for slippery conditions. You are more likely to be
affected by slippery road surfaces when driving a tow
vehicle with a trailer, than driving a tow vehicle without a
trailer.

SECTION 1 - SAFETY PRECAUTIONS
1-2 – Triple-L-Trailer – 3121224
Anticipate the trailer “swaying.” Swaying is the trailer reac-
tion to the air pressure wave caused by passing trucks
and busses. Continued pulling of the trailer provides a sta-
bilizing force to correct swaying. Do not apply the brakes
to correct trailer swaying.
Check rear view mirrors frequently to observe the trailer
and traffic.
Use lower gear when driving down steep or long grades.
Use the engine and transmission as a brake. Do not ride
the brakes, as they can overheat and become ineffective.
Be aware of your trailer height, especially when approach-
ing roofed areas and when around trees.
Hitting a bump or depression in the road surface or run-
ning off the shoulder of the road, and then returning to the
road surface, can adversely affect the stability of the trailer
or towing vehicle.
Rounding a corner or curve at excessive speed can
adversely affect the stability of the trailer or towing vehicle.
Trailer Improperly Coupled to the Hitch
It is critical that the trailer be securely coupled to the hitch,
and that the safety chains are correctly attached. Uncou-
pling could result in death or serious injury.
DO NOT MOVE THE TRAILER UNTIL THE COUPLER IS SECURED
AND LOCKED TO HITCH, THE SAFETY CHAINS ARE SECURED
TO THE TOW VEHICLE AND THE TRAILER JACK(S) ARE FULLY
RETRACTED.
DO NOT TOW THE TRAILER ON THE ROAD UNTIL THE TIRES
AND WHEELS ARE CHECKED, THE TRAILER BRAKES ARE
CHECKED, THE BREAKAWAY CABLE IS CONNECTED TO THE
TOW VEHICLE, THE LOAD IS SECURED TO THE TRAILER AND
THE TRAILER LIGHTS ARE CONNECTED AND CHECKED.
Incorrect Use of Safety Chains
If your trailer comes loose from the hitch for any reason,
safety chains are provided so that control of the trailer can
still be maintained. The chains originally supplied with the
trailer are of proper size. Be sure the chains are not
allowed to drag while towing. If links become worn,
replace with proper size chain. Always check that the
chains are attached to the tow vehicle before towing.
FASTEN CHAINS ONLY TO FRAME OF TOW VEHICLE. DO NOT
FASTEN CHAINS TO ANY PART OF THE HITCH UNLESS THE
HITCH HAS HOLES OR LOOPS SPECIFICALLY FOR THAT PUR-
POSE. CROSS CHAINS UNDERNEATH HITCH AND COUPLER
WITH ENOUGH SLACK TO PERMIT TURNING AND TO HOLD
TONGUE UP, IF THE TRAILER COMES LOOSE.
Incorrect Use of Breakaway Brake
When equipped with brakes, a breakaway brake system
applies the brakes on your trailer if your trailer comes
loose from the hitch for any reason. The safety chains and
breakaway brake system must be in good condition and
properly rigged to be effective.
THE BREAKAWAY CABLE MUST BE CONNECTED TO THE TOW
VEHICLE; AND NOT TO ANY PART OF THE HITCH. BEFORE TOW-
ING THE TRAILER, TEST THE FUNCTION OF THE BREAKAWAY
BRAKE SYSTEM. IF THE BREAKAWAY BRAKE SYSTEM IS NOT
WORKING, DO NOT TOW THE TRAILER; HAVE IT SERVICED OR
REPAIRED.
Mismatch of Trailer and Hitch
The use of a Weight Carrying Hitch instead of a Weight
Distributing Hitch can place too much tongue load on the
rear end of the towing vehicle. This combined loading can
cause the rear end of the towing vehicle to sag downward
and the forward end to be raised upward, causing steer-
ing problems and towing vehicle sway at other than slow
speeds.
BE SURE YOUR HITCH AND TOW VEHICLE ARE RATED FOR THE
GROSS VEHICLE WEIGHT RATING OF YOUR TRAILER.
Unsafe Tires, Lug Nuts or Wheels
It is essential to visually inspect the trailer tires and wheels
before each tow.
If a tire has a bald spot, bulge, cuts, is showing any cords,
or is cracked, replace the tire before towing. If a tire has
uneven tread wear, take the trailer to a dealer or service
center for diagnosis. Uneven tread wear can be caused by
tire imbalance, axle misalignment or incorrect inflation.
Tires with too little tread will not provide adequate tracking
on wet roadways and could result in loss of control, lead-
ing to death or serious injury.
Improper tire pressure may cause an unstable trailer and
could result in a tire blowout and loss of control. Tires
must be inspected and inflated in accordance with section
4 of this manual.
TRAILER TIRES WILL BE INFLATED TO HIGHER PRESSURES
THAN PASSENGER VEHICLE TIRES. UNDER-INFLATED FRONT
TIRES ON THE TOWING VEHICLE COULD CAUSE STEERING
PROBLEMS. LOW PRESSURE IN THE REAR TIRES OF THE TOW-
ING VEHICLE COULD CAUSE THE VEHICLE TO SWAY.

SECTION 1 - SAFETY PRECAUTIONS
3121224 – Triple-L-Trailer – 1-3
Trailer wheels and lug nuts are subjected to significant
side loads during tow. Before each tow, visually inspect
the lug nuts for loosening. Lug nuts must be tightened to
the proper torque in accordance with section 4 of this
manual.
Overload
The total weight of the load you put in or on the trailer, plus
the empty weight of the trailer itself, must not exceed the
trailer's Gross Vehicle Weight Rating (GVWR). If you do
not know the empty weight of the trailer, you must mea-
sure it at a scale.
Determining the load limits of a trailer includes more than
understanding the load limits of the tires alone. On all trail-
ers there is a VIN (Vehicle Indentification No.) label and
Tire Information Label that is located on the forward half of
the left (road) side of the unit. VIN Label indicates the
trailer’s Gross Vehicle Weight Rating (GVWR). This is the
most weight the fully loaded trailer can weigh. It will also
provide the Gross Axle Weight Rating (GAWR). This is the
most a particular axle can support. If there are multiple
axles, the GAWR of each axle will be provided.
Steps for Determining Correct Load Limit
• Locate the statement, “The weight of cargo should
never exceed XXX kg or XXX lbs.,” on your vehicle’s
placard.
• This 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.
NOTE: Refer to production options and accessory weight
Table 2-2 for weights of various trailer options.
DO NOT LOAD A TRAILER SO THAT THE WEIGHT EXCEEDS THE
TRAILER GROSS VEHICLE WEIGHT RATING (GVWR) OR GROSS
AXLE WEIGHT RATING (GAWR).
The Tire Information Label provides tire and loading infor-
mation and a statement regarding maximum cargo capac-
ity. Inspect this label.
NOTE: Refer to Figure 1-1. for Tire Information Label and
VIN Label location.
Excessive loads and/or underinflation cause tire overload-
ing and, as a result, abnormal tire flexing occurs. This situ-
ation can generate an excessive amount of heat and lead
to tire failure. It is the air pressure that enables a tire to
support the load, so proper inflation is critical. The proper
air pressure may be found on the VIN label and/or on the
Tire Information Label. This value should never exceed the
maximum cold inflation pressure stamped on the tire.
MODEL
RIMS
THIS VEHICLE CONFORMS TO ALL APPLICABLE U.S. FEDERAL MOTOR VEHICLE SAFETY
STANDARDS IN EFFECT ON THE DATE OF MANUFACTURE.
TIRES
PNBV/GVWR (kg/lb)
DATE
INFL C
(KPa/psi)
PNBE/GAWR (ea.axle)(kg/lb)
Mf d. By : JLG Industries, Inc - McConnellsburg, PA--USA Phone 877-JLG-LIFT
SERIAL NO.
V.I.N. No. VEHICLE
TYPE: TRAILER/REMORQUE
18617D
VIN Label
FD-322
XXXXXXXXXXXXXX XXXXXXXXXXXXXX
XXXXXXXXXXXXXX XXXXXXXXXXXXXX
XXXXXXXXXXXXXX XXXXXXXXXXXXXX
TIRE AND LOADING INFORMATION
Tire Information Label

SECTION 1 - SAFETY PRECAUTIONS
1-4 – Triple-L-Trailer – 3121224
Unsafe Load Distribution
Uneven load distribution can cause tire, wheel, axle or
structural failure. Be sure your trailer is properly loaded. A
proper weight distribution is equal, right to left; and cre-
ates a tongue weight that is in the proper range for stable
trailer handling (between 10-15% of the total weight of the
cargo and the trailer). Towing stability also depends on
keeping the center of gravity as low as possible. Load
heavy items on the floor and over the axles, but do not
exceed the axle load rating (GAWR). When loading addi-
tional items, be sure to maintain even side-to-side weight
distribution and proper tongue weight.
MAKE CERTAIN THAT THE TONGUE WEIGHT IS WITHIN THE
ALLOWABLE RANGE. BE SURE TO DISTRIBUTE THE LOAD
FRONT-TO-REAR TO PROVIDE PROPER TONGUE WEIGHT, DIS-
TRIBUTE THE LOAD EVENLY, RIGHT AND LEFT, TO AVOID TIRE
OVERLOAD AND KEEP THE CENTER OF GRAVITY LOW.
Shifting Cargo
Since the trailer “ride” can be bumpy and rough, you must
secure your cargo so that it does not shift while the trailer
is being towed.
TIE DOWN ALL LOADS WITH PROPER SIZED FASTENERS,
ROPES, STRAPS, ETC. IF YOUR TRAILER IS ENCLOSED OR
EQUIPPED WITH AN OPTIONAL TAILGATE, THE DOORS OR TAIL-
GATE MUST BE SECURELY LATCHED BEFORE TOWING THE
TRAILER.
Inappropriate Cargo
If your trailer is designed for specific cargo, only carry that
cargo in the trailer. A utility trailer must not be used to
carry certain items, such as people, containers of hazard-
ous substances or containers of flammable substances.
DO NOT TRANSPORT PEOPLE ON OR INSIDE THE TRAILER. THE
TRANSPORT OF PEOPLE PUTS THEIR LIVES AT RISK AND MAY
BE ILLEGAL.
DO NOT TRANSPORT FLAMMABLE, EXPLOSIVE, POISONOUS OR
OTHER DANGEROUS MATERIALS IN YOUR TRAILER.
EXCEPTIONS: FUEL IN THE TANKS OF EQUIPMENT BEING
HAULED; FUEL STORED IN THE TANK OF AN ON-BOARD GEN-
ERATOR
Inoperable Brakes, Lights or Mirrors
Be sure that all of the lights on your trailer are functioning
properly before towing your trailer. Lights on a trailer are
controlled via a connection to the tow vehicle, generally a
multi-pin electrical connector. Check the trailer taillights by
turning on your tow vehicle headlights. Check the trailer
brake lights by having someone step on the tow vehicle
brake pedal while you look at the trailer lights. Have some-
one activate the tow vehicle’s turn signals to check the
trailer’s turn signal lights.
If your trailer has electric brakes, your tow vehicle must
have an electric brake controller that sends power to the
trailer brakes. Before towing the trailer on the road, you
must operate the brake controller while trying to pull the
trailer in order to confirm that the electric brakes operate.
While towing the trailer at less than 5 mph, manually oper-
ate the electric brake controller in the tow vehicle cab. You
should feel the operation of the trailer brakes.
BEFORE EACH TOW CHECK THAT THE TAILLIGHTS, BRAKE
LIGHTS AND TURN SIGNALS WORK AND CHECK THAT THE
ELECTRIC BRAKES WORK BY OPERATING THE BRAKE CON-
TROLLER INSIDE THE TOW VEHICLE.
1
2
Figure 1-1. VIN Label & Tire Information Label
1. VIN Label 2. Tire Information Label

SECTION 1 - SAFETY PRECAUTIONS
3121224 – Triple-L-Trailer – 1-5
Standard mirrors usually do not provide adequate visibility
for viewing traffic to the sides and rear of towed trailer. You
must provide mirrors that allow you to safely observe
approaching traffic.
Modifying the Trailer
Essential safety items can be damaged by altering your
trailer. Even simply driving a nail or screw to hang some-
thing can damage an electrical circuit, hydraulic line or
other feature of the trailer.
Before making any alteration to your trailer, contact your
dealer or JLG at 1-877-JLG-SAFE (554-7233) between the
hours of 8:00 AM and 4:45 PM Eastern Standard time and
describe the alteration you are contemplating. Alteration
of the trailer structure or modification of mechanical, elec-
trical, hydraulic or other systems on your trailer must be
approved by JLG and performed only by qualified techni-
cians who are familiar with the system as installed on your
trailer.
Inadequate Tow Vehicle or Towing Hitch
It is essential for the tow vehicle and towing hitch to have a
rated towing capacity equal or greater than the trailer
Gross Vehicle Weight Rating (GVWR). Vehicle manufactur-
ers will provide you with the maximum capacities of their
various models. The hitch ball size must be the same as
the coupler size. The height of the hitch ball must equal
that of the trailer coupler. If the hitch ball is too small, too
large, is underrated, is loose or is worn, the trailer could
come loose from the tow vehicle, and could cause death
or serious injury.
BE SURE THE HITCH LOAD RATING IS EQUAL TO OR GREATER
THAN THE LOAD RATING OF THE COUPLER. BE SURE THE
HITCH SIZE MATCHES THE COUPLER SIZE. OBSERVE THE
HITCH FOR WEAR, CORROSION AND CRACKS BEFORE COU-
PLING. REPLACE WORN, CORRODED OR CRACKED HITCH COM-
PONENTS BEFORE COUPLING THE TRAILER TO THE TOW
VEHICLE. BE SURE THE HITCH COMPONENTS ARE TIGHT
BEFORE COUPLING THE TRAILER TO THE TOW VEHICLE.
Not Properly Maintaining the Trailer
Structure
Proper maintenance is essential for all trailer structural
components to operate properly. Structural components
can consist of the trailer deck assembly, deck latching
mechanism, suspension, and axle components. To ensure
safe and proper operation of the trailer, make sure that the
proper maintenance and inspections are performed.
1.4 REPORTING SAFETY DEFECTS
If you believe that your vehicle has a defect that could
cause a crash or could cause injury or death, you should
immediately inform the National Highway Traffic Safety
Administration (NHTSA) in addition to notifying JLG Indus-
tries, Inc.
If NHTSA receives similar complaints, it may open an
investigation, and if it finds that a safety defect exists in a
group of vehicles, it may order a recall and remedy cam-
paign. However, NHTSA cannot become involved in indi-
vidual problems between you, your dealer, or JLG
Industries, Inc.
To contact NHTSA, you may either call the Auto Safety
Hotline toll-free at 1-888-327-4236 (TTY: 1-800-424-9153);
go to http://www.safercar.gov; or write to:
Administrator
NHTSA
1200 New Jersey Avenue S.E.
Washington, DC 20590
Further information about motor vehicle safety can also be
obtained from http://www.safercar.gov or from the JLG
PS&R Hotline at 1-877-JLG-SAFE (554-7233) between the
hours of 8:00 AM and 4:45 PM Eastern Standard time.
1.5 SAFETY WARNING LABELS ON YOUR
TRAILER
All decals and safety warning labels are placed on the
trailer for a reason. Read, understand, and follow the
directions of all the decals. Should the decals become
worn or defaced, replace them immediately. Use the
appropriate part number and order from your local dealer
or direct from the trailer manufacturer.
ALL OF THE LABELS MUST BE ON THE TRAILER AND MUST BE
LEGIBLE. REPLACE ANY MISSING OR ILLEGIBLE LABELS. (SEE
FIGURE 1-2., DECAL LOCATION).

SECTION 1 - SAFETY PRECAUTIONS
1-6 – Triple-L-Trailer – 3121224
1
1
6
7
10
98
11
13
4
12
12
Figure 1-2. Decal Location

SECTION 1 - SAFETY PRECAUTIONS
3121224 – Triple-L-Trailer – 1-7
*Note: These decals are only available on the following models; 1012/1014/UT912/UT914/EC10/EC12/EC14.
Table 1-1. Decal Location Legend
Item Number/Model Decal Number
1 1705809
2 1705782
3
Model UT610
Model UT612
Model UT614
Model EC-10
Model EC-12
Model EC-14
Model 248
Model UT28
Model 449
Model UT49
Model 4610
Model UT4610
Model 1012
Model 1014
Model UT912
Model UT914
Model 7910
Model 7612
Model 7614
Model 7616
1705761
1705762
1705763
1705764
1705765
1705766
1705767
1705768
1705769
1705770
1705771
1705772
1705773
1705774
1705775
1705776
1705777
1705778
1705779
1705780
4 1705810
5 70319
6 70327
7
all except Model 449 & UT49 1707075
1707076
8
Model 449 & UT49 only
70322
1001105881
9 70325
10 70323
11 27611
12 1705783
13 70230
14 70317
15* 1705817
16 1706687

SECTION 1 - SAFETY PRECAUTIONS
1-8 – Triple-L-Trailer – 3121224
NOTES:

SECTION 2 - TRAILER OPERATION
3121224 – Triple-L-Trailer – 2-1
SECTION 2. TRAILER OPERATION
2.1 TRAILER MODELS
Triple-L™ Trailers employ a unique trailer deck design to make loading and unloading easier. The trailer deck can be lowered
to the ground while remaining level, allowing equipment to be rolled or driven directly onto the trailer deck.
Table 2-1. Trailer Model Specifications
MODEL DECK SIZE (in)
VEHICLE
CAPACITY
WEIGHT (lbs)
AXLE STANDARD BRAKE
CONFIGURATION LIFT GVWR
248 52 x 96 2200 Single Optional Hand Winch 3600 lbs (1633 kg)
449 52 x 108 5000 Single Electric Hydraulic 6810 lbs (3089 kg)
4610 72 x 120 4500 Single Electric Hydraulic 6537 lbs (2965 kg)
7610 70 x 120 7000 Tandem Electric - 1 Axle Hydraulic 9574 lbs (4343 kg)
7612 70 x 144 7000 Tandem Electric - 1 Axle Hydraulic 9750 lbs (4423 kg)
7614 70 x 168 7000 Tandem Electric - 1 Axle Hydraulic 9950 lbs (4513 kg)
7616 70 x 192 6500 Tandem Electric - 1 Axle Hydraulic 9700 lbs (4400 kg)
1012 70 x 144 10,000 Tandem Electric - 2 Axles Hydraulic 13,102 lbs (5943 kg)
1014 70 x 168 10,000 Tandem Electric - 2 Axles Hydraulic 13,342 lbs (6052 kg)
UT28 52 x 96 2000 Single Optional Hand Winch 3790 lbs (1719 kg)
UT49 52 x 108 4500 Single Electric Hydraulic 6460 lbs (2930 kg)
UT410 70 x 120 4000 Single Electric Hydraulic 6800 lbs (3085 kg)
UT610 70 x 120 6000 Tandem Electric - 1 Axle Hydraulic 9740 lbs (4418 kg)
UT612 70 x 144 6000 Tandem Electric - 1 Axle Hydraulic 9903 lbs (4492 kg)
UT614 70 x 168 6000 Tandem Electric - 1 Axle Hydraulic 9720 lbs (4409 kg)
UT912 70 x 144 9000 Tandem Electric - 2 Axles Hydraulic 13,268 lbs (6018 kg)
UT914 70 x 168 9000 Tandem Electric - 2 Axles Hydraulic 13,570 lbs (6155 kg)
EC10 68 x 120 6000 Tandem Electric - 2 Axles Hydraulic 9600 lbs (4345 kg)
EC12 68 x 126 6000 Tandem Electric - 2 Axles Hydraulic 9800 lbs (4445 kg)
EC14 68 x 150 6000 Tandem Electric - 2 Axles Hydraulic 10,320 lbs (4681 kg)

SECTION 2 - TRAILER OPERATION
2-2 – Triple-L-Trailer – 3121224
Production Option and Accessory Weights
Any time a trailer is equipped with a production option or accessory or one of these components is added to a trailer, the
weights listed in the following table must be subtracted from the rated vehicle capacity weight.
NOTE: The specified options and accessories must be considered part of cargo weight.
The single axle electric brake and battery are part of the base weight of the single axle trailer and double axle trailer
models 248 and UT28.
The dual electric brake and battery are part of the base weight of the 1012 and 1014 models.
Table 2-2. Production Option and Accessory Weights
MODEL
HYDRAULIC
BRAKE
(single axle)
HYDRAULIC
BRAKE
(dual axle)
ELECTRIC
BRAKE
(dual axle)
SPARE
TIRE
TIRE
MOUNT WINCH RAILS (12 IN)
RAILS
(24 IN) GATE
248 19 lbs -- -- 50 lbs 20 lbs 45 lbs -- -- --
449 19 lbs -- -- 60 lbs 20 lbs 45 lbs -- -- --
4610 19 lbs -- -- 60 lbs 20 lbs 45 lbs -- -- --
7610 34 lbs 145 lbs 102 lbs 60 lbs 20 lbs 45 lbs -- -- --
7612 34 lbs 145 lbs 102 lbs 60 lbs 20 lbs 45 lbs -- -- --
7614 34 lbs 145 lbs 102 lbs 60 lbs 20 lbs 45 lbs -- -- --
7616 34 lbs 145 lbs 102 lbs 60 lbs 20 lbs 45 lbs -- -- --
1012 -- 48 lbs -- 60 lbs 20 lbs 45 lbs -- -- --
1014 -- 48 lbs -- 60 lbs 20 lbs 45 lbs -- -- --
UT28 19 lbs -- -- 50 lbs 20 lbs 45 lbs 90 lbs 108 lbs 38 lbs
UT49 19 lbs -- -- 60 lbs 20 lbs 45 lbs 90 lbs 108 lbs 38 lbs
UT410 19 lbs -- -- 60 lbs 20 lbs 45 lbs 100 lbs 117 lbs 49 lbs
UT610 34 lbs -- -- 60 lbs 20 lbs 45 lbs 100 lbs 117 lbs 49 lbs
UT612 34 lbs -- -- 60 lbs 20 lbs 45 lbs 111 lbs 129 lbs 49 lbs
UT614 34 lbs -- -- 60 lbs 20 lbs 45 lbs 123 lbs 141 lbs 49 lbs
UT912 -- 48 lbs -- 60 lbs 20 lbs 45 lbs 111 lbs 129 lbs 49 lbs
UT914 -- 48 lbs -- 60 lbs 20 lbs 45 lbs 123 lbs 141 lbs 49 lbs
EC10 34 lbs -- -- 60 lbs 20 lbs 45 lbs -- -- --
EC12 34 lbs -- -- 60 lbs 20 lbs 45 lbs -- -- --
EC14 34 lbs -- -- 60 lbs 20 lbs 45 lbs -- -- --