Clark SEC20-35 User manual

Operator's Manual
SEC20-35
OM-1205
MAR 2022 | REV 1.5
IMPORTANT! Do not remove this manual from the lift truck.

© 2023CLARK Material Handling Company

4
Table of Contents
Information............................................................................................................................... 6
Overview................................................................................................................................... 7
A Message to Operators ......................................................................................................... 8
Introduction.............................................................................................................................. 9
How to Use this Manual .........................................................................................................11
Safety Standards ................................................................................................................... 12
Section 1. General Safety Rules........................................................................................... 13
Do’s and Don’ts ............................................................................................................... 14
Operator Protection ......................................................................................................... 15
Pedestrians ..................................................................................................................... 16
Upright............................................................................................................................. 18
Travel............................................................................................................................... 19
Parking ............................................................................................................................ 20
Tipover............................................................................................................................. 21
Section 2. Operating Hazards............................................................................................... 23
Load Handling ................................................................................................................. 24
Collisions ......................................................................................................................... 27
Drop-O󰀨s......................................................................................................................... 28
Ramps and Grades ......................................................................................................... 29
Surface and Capacity ...................................................................................................... 30
Section 3. Know Your Lift Truck........................................................................................... 31
Overview ......................................................................................................................... 32
Operator Controls............................................................................................................ 33
Seat ................................................................................................................................. 39
Steering Column.............................................................................................................. 40
Hood................................................................................................................................ 41
Operator Presence System ............................................................................................. 42
Data Plate........................................................................................................................ 43
Decals ............................................................................................................................. 44
Section 4. Operating the Display ......................................................................................... 47
Overview ......................................................................................................................... 48
Icons and Indicators ........................................................................................................ 50
Menu ............................................................................................................................... 54
OM-1205

5
Section 5. Operating Your Lift Truck ................................................................................... 59
Before Operating the Lift Truck ....................................................................................... 60
Safe Operation ................................................................................................................ 61
Forks and Upright............................................................................................................ 62
Load Handling ................................................................................................................. 64
Braking ............................................................................................................................ 69
Parking ............................................................................................................................ 70
Section 6. Maintaining Your Lift Truck ................................................................................ 71
Safe Maintenance ........................................................................................................... 72
Operator's Daily Checklist ............................................................................................... 73
Daily Inspection ............................................................................................................... 74
Cleaning .......................................................................................................................... 76
Planned Maintenance...................................................................................................... 77
Forks and Lift Chain ........................................................................................................ 79
Wheels and Tires............................................................................................................. 81
Fuses............................................................................................................................... 82
Battery ............................................................................................................................. 84
Section 7. Towing and Lowering.......................................................................................... 87
Emergency Towing .......................................................................................................... 88
Emergency Lowering....................................................................................................... 90
Transporting .................................................................................................................... 91
Section 8. Specications ...................................................................................................... 93
SEC20-35........................................................................................................................ 94

6
Information
Information
Lift Truck Information
Model
Type
Serial No.
Truck Weight
Rated Capacity
Gross Weight
Component Serial Number
Drive Axle / Motor
Steer Axle
Hydraulic Pump / Motor
Traction Controller
Pump Controller

7
Overview
Overview
YOU can prevent accidents
First: Know the rules of safe lift truck operation and the safety
rules specic to your work area.
Next: Read the Operator’s Manual. If you do not understand
something, ask your supervisor.
LEARN about the lift truck you operate!
WARNING
If you do not follow these rules, there is a risk of injury or death.
IMPORTANT!
Do not expose this manual to hot water or steam.
Know YOUR lift truck
Then: Operate your lift truck safely.
And: Keep your lift truck in a safe operating condition
with correct and regular maintenance.

8
A Message to Operators
A Message to Operators
Your CLARK lift truck is a specialized machine with unique operating characteristics, and
designed to perform a specic task. It requires specic instructions and rules for safe operation
and maintenance.
Its function and operation is not like a car or ordinary passenger vehicle. Specialized instructions
and rules are required to ensure safe and correct operation and maintenance.
The safe operation of our lift trucks is of utmost importance to CLARK.
Lift truck accidents are most commonly caused by...
• An incorrectly trained operator.
• An inexperienced operator.
• An operator not obeying basic lift truck safety rules.
• A damaged or malfunctioning lift truck.
For these reasons, CLARK wants you to know how to safely operate and properly maintain
your lift truck.
The primary function of this manual is to help you learn how to safely operate your lift truck. This
manual gives the correct safety rules and hazards of lift truck operation. It also identies the
special components and features of your specic lift truck and describes their function.
This manual is not a training manual, it is a resource to assist trained and authorized operators
how to safely operate their lift truck by showing the correct procedures.
This manual does not include information about every possible condition that may result in an
accident. Be aware of all possible hazards in your specic work area and be certain to correct
or avoid them.
Always make sure that the lift truck is maintained to a safe, working condition. Do not operate a
damaged or malfunctioning lift truck. Practice safe operation every time you operate your lift truck.
Let's set high standards in safety together!
Before beginning operation, make sure you understand the safe and correct operating procedures
of your lift truck. It is your responsibility to operate the lift truck safely, correctly, and e󰀩ciently.
Know and understand that the federal Occupational Safety and Health Act (OSHA) and state,
provincial, and local law, require operators to be trained and certied in the safe operation of
their lift truck. It is an OSHA requirement that the lift truck be inspected BEFORE every shift.
If you have not been certied (or need recertication) to operate or inspect your lift truck, tell
your supervisor.
All CLARK lift trucks are designed and built to handle hard work, but not abuse from an operator.
They are designed and built to be dependable, but are only as safe and e󰀩cient as the operator(s)
and person(s) responsible for using and maintaining them.
Do not make repairs to any lift truck unless you have been authorized and properly trained to do
so. For questions concerning the proper maintenance or repair of your CLARK lift truck, contact
your CLARK dealer.
Only use genuine CLARK replacement parts and accessories to ensure optimal performance
of your lift truck!

9
Introduction
Introduction
Foreword
CLARK welcomes you to the growing group of professionals who own, operate, and/or maintain
our lift trucks. We take pride in the tradition of high quality and superior value that the CLARK
name represents.
This Operator’s Manual has been specially prepared to help you use and maintain your CLARK
lift truck in a safe and correct manner. It describes the safe operation, maintenance, and features
unique to your CLARK lift truck. The safe and e󰀩cient operation of your lift truck depends on
both operator skill and knowledge.
The operator must always...
• Read and understand the safety rules described in this Operator’s Manual.
• Read and practice the safe driving and safe load handling techniques shown in
this manual.
• Know the construction and features of the lift truck and how they function.
• Know the capabilities and limitations of the lift truck.
• Ensure the lift truck is maintained to a safe working condition
Your CLARK lift truck has been designed and built to be as safe and e󰀩cient as technology allows.
As manufactured, it meets all applicable and mandatory design and construction requirements
of the ANSI / ITSDF B56.1 Safety Standard for Low Lift and High Lift Trucks.
Importance of Routine Inspection and Maintenance
The regular care and proper maintenance of your CLARK lift truck is absolutely necessary to
your safety. It also allows for a lower cost of ownership and optimal productivity. A damaged or
malfunctioning lift truck is a potential source of danger to the operator, any personnel working
nearby, and anyone else in the work area. Always keep your lift truck in a safe, operating condition
by following the recommended service schedule described in the Planned Maintenance section
of this manual.
Operator's Daily Inspection
You are required to inspect your lift truck daily and to ensure it is safe to operate. The importance
of this Daily Inspection is described later in this manual. You can provide your own checklist
sheet or your CLARK dealer can supply you with copies of a helpful Operator's Daily Checklist.
Planned Maintenance
In addition to the Daily Inspection, CLARK recommends that a Planned Maintenance (PM) program
be performed by an authorized and properly trained technician. This safety and maintenance
inspection and service will provide an opportunity to thoroughly examine the operating condition
of your lift truck. Any Planned Maintenance can be scheduled through your CLARK dealer to
meet your specic lift truck application and usage.
The Planned Maintenance program covers periodic inspections, checks, cleaning, lubrication,
and minor adjustments. Any necessary adjustments and timely maintenance will be performed to
maximize the service life of components and reduce unscheduled downtime. These procedures
are described in detail in your lift truck's service manual. Your CLARK dealer can help with
implementing a Planned Maintenance program and providing properly trained and authorized
service technicians to keep your lift truck operating safely and e󰀩ciently.

10 Introduction
Always Practice Safe Operation
Incorrect lift truck operation can cause accidents. Do not operate an improperly setup, damaged,
or malfunctioning lift truck.
Read and understand the procedures for safe driving and maintenance described in this manual.
If you have questions, ask for assistance.
Stay alert and follow the rules, regulations, and procedures for safe lift truck operation. Avoid
accidents by identifying and avoiding potentially dangerous procedures or situations.
Drive and work safely and follow the safety messages and warnings found in this manual and
attached to your lift truck.
Safety Messages and Warnings
The safety messages and warnings, found in this manual and attached to the lift truck, identify
specic areas where potential hazards exist. Make sure to know and understand the meaning
of these instructions, symbols, and messages. Damage to the lift truck, serious injury, or death
to you and/or other personnel may result if these messages are not followed.
NOTE
Provides helpful information related to procedures, equipment, tools, specications, or
other special data.
WARNING
There is a risk of injury or death to the operator or nearby personnel.
CAUTION
There is a risk of damage to the lift truck or nearby objects.

11
How to Use this Manual
How to Use this Manual
CLA
R
K
• All descriptions, images, and specications in this Operator’s Manual were correct at
the time of printing.
• CLARK Material Handling Company reserves the right to make improvements and
changes to the specications and/or design, without notice and without incurring
obligation. Contact your authorized CLARK dealer for information on possible
updates or revisions to this or any other CLARK technical information.
• The examples, illustrations, and descriptions in this manual are intended to help
improve your skill and knowledge as a professional lift truck operator and to take
complete advantage of the capabilities and features of your lift truck.
• Read and understand the information located in the General Safety Rules and
Operating Hazards sections of this Operator’s Manual.
• Follow the instructions and procedures about how to correctly maintain your lift truck,
including recommended service intervals and component capacities.
• Safe and careful driving is your responsibility! Drive defensively and always be aware
of other personnel who are working nearby. Know your lift truck’s capabilities and
limitations.
• Follow all IMPORTANT, CAUTION, WARNING, and DANGER messages or warnings
to avoid damage to the lift truck and/or injury to yourself or others.
• OHSA requires that the Operator’s Manual be permanently attached to your lift truck.
Keep this manual on the lift truck as a reference for anyone who may operate or
service it. If the lift truck you operate is not equipped with an Operator’s Manual, alert
your supervisor immediately.
• Your authorized CLARK dealer is ready to help and can provide you with additional
information about the unique features, operation, and maintenance of your lift truck.
The Operator’s Manual contains important information about the safe operation, features,
functions, and maintenance of your CLARK lift truck.
IMPORTANT!
Read the Operator’s Manual before operating your lift truck.

12
Safety Standards
Safety Standards
IMPORTANT!
Your CLARK lift truck has been built to meet all applicable mandatory design and
construction requirements of the ANSI / ITSDF B56.1 Safety Standard for Low Lift
and High Lift Trucks. No additions, omissions, or modications should be made to the
lift truck that a󰀨ect compliance to the above requirements or in any way minimize the
e󰀨ectiveness of it’s safety devices.
IMPORTANT!
Familiarize yourself with the safety instructions contained in the following publications:
ANSI / ITSDF B56.1 Safety Standard for Low Lift and High Lift Trucks
Available from: Industrial Truck Standards Development Foundation, 1750 K Street NW
Suite 460, Washington, DC 20006.
NFPA 505 Fire Safety Standard for Powered Industrial Trucks Including Type
Designations, Areas of Use, Conversions, Maintenance and Operations
Available from: National Fire Protection Association, Inc., 1 Batterymarch Park, Quincy, MA
02169.
OSHA 1910.178 Powered Industrial Trucks
Available from: Occupational Safety & Health Administration, 200 Constitution Ave NW,
Washington, DC 20210.
UL 583 Standard for Electric-Battery-Powered Industrial Trucks
Available from: Underwriters Laboratory Headquarters, 333 Pngsten Road, Northbrook,
IL 60062.

13Contents
Section 1. General Safety Rules
Contents
Do’s and Don’ts ....................................................................................... 14
Operator Protection................................................................................. 15
Pedestrians .............................................................................................. 16
Upright...................................................................................................... 18
Travel ........................................................................................................ 19
Parking ..................................................................................................... 20
Tipover...................................................................................................... 21

14
Do’s and Don’ts
Do’s and Don’ts
DON’T mix drugs or alcohol with your job.
DO watch for pedestrians.
DON’T block safety equipment.
DO wear personal protective equipment.
DON’T smoke while operating the lift truck
and in NO SMOKING areas.
DON’T operate the lift truck outdoors during poor
weather conditions such as rain, snow, or ice.

15
Section 1. General Safety Rules
Operator Protection
Operator Protection
WARNING
• Stay under the overhead guard
when operating the lift truck.
• Keep arms and legs inside the
operator’s compartment.
• Be careful when traveling in reverse
and in tight areas.
Seat Belt
Overhead Guard
Always use the seat belt.

16
Pedestrians
Pedestrians
WARNING
The operator is the only person allowed on the lift truck.
WARNING
Do not transport personnel with the lift truck.
No Riders

17
Section 1. General Safety Rules
Nearby Personnel
WARNING
• Alway look in the direction of travel.
• Always slow down and sound the horn at every intersection or area with limited
visibility.
• Always alert personnel to stand back while operating or parking the lift truck.
• Always be aware of any personnel in your work area.

18
Upright
Upright
WARNING
Do not walk or stand under raised forks.
WARNING
Do not raise personnel with the lift truck.
Forks and Upright
Pinch Points
WARNING
Keep hands, feet, and legs out of the upright.
WARNING
Do not use the upright as a ladder.

19
Section 1. General Safety Rules
Travel
Travel
Forward Travel
• Lower the forks to a safe height and tilt
the upright back when traveling with a
load.
• Do not lift or lower a load while the lift
truck is traveling.
Reverse Travel
• Travel in reverse when handling loads
that restrict your view.
• Rotate in your seat and look in the
direction of travel when traveling in
reverse.
Loaded Travel
• Unstable loads are a hazard to you and
other nearby personnel.
• Make sure all loads are stacked
correctly and equally positioned across
the forks.
• Position the heaviest part of the load
closest to the front wheels of the lift
truck.
• Do not attempt to lift a load using one
fork.

20
Parking
Parking
Parking Rules
• Do not park the lift truck on a ramp or grade.
• Do not leave the lift truck before coming to a complete stop.
• Park the lift truck in an authorized area only.
• Do not block tra󰀩c.
• Put the directional control in the neutral position.
• Fully lower the upright and/or attachments to the ground.
• Remove the key when leaving the lift truck for an extended period.
WARNING
Always apply the parking brake before attempting to exit the lift truck. An icon will
illuminate on the dash display when the parking brake is engaged.