Snorkel S2633 User Manual

Operator’s

Manual

Part Number 8210048
November, 2008

The aerial platform is not electrically insulated. Death or serious injury will result from contact
with, or inadequate clearance from, an energized conductor.

Do not go closer than the minimum safe approach distance as defi ned by the Minimum Safe
Approach Distance section in Chapter 3–Safety .

Regard all conductors as energized.

Allow for electrical wire sag and aerial platform sway.

If the platform, scissors structure, or any part of the aerial platform contacts a high-voltage electrical
conductor, the entire machine can become electrically charged.

If that happens, remain on the machine and do not contact any other structure or object. This includes
the ground, adjacent buildings, poles, and any other objects that are not part of the aerial platform.

Such contact could make your body a conductor to the other object, creating an electrical shock hazard
resulting in death or serious injury.

If an aerial platform is in contact with an energized conductor the platform operator must warn ground
personnel in the vicinity to stay away. Their bodies can conduct electricity creating an electrical shock
hazard resulting in death or serious injury.

Do not approach or leave the aerial platform until the electricity has been turned off.

Do not attempt to operate the lower controls when the platform, scissor structure, or any part of the
aerial platform is in contact with a high-voltage electrical conductor or if there is an immediate danger
of such contact.

Personnel on or near an aerial platform must be continuously aware of electrical hazards, recognizing
that death or serious injury can result from contact with an energized conductor.

California

Proposition 65 Warning

Battery posts, terminals, and related accessories contain
lead and lead components, chemicals known to the
State of California to cause cancer and birth defects or
other reproductive harm. Wash hands after handling.

Table of Contents

Electrical Danger ............................ Inside Front Cover

California Proposition 65 ................ Inside Front Cover

Chapter 1 – Introduction

Aerial Platform Features .............................................1

Options .......................................................................1

Operator’s Manual ...................................................... 1

Safety Alerts ...............................................................1

Operation .................................................................... 1

Maintenance ............................................................... 2

Manual of Responsibilities ..........................................2

Additional Information .................................................2

Component Identifi cation ............................................3

Chapter 2 – Specifi cations

General Specifi cations................................................ 4

Chapter 3 – Safety

Electrocution Hazards ................................................5

Minimum Safe Approach Distance .............................5

Prestart Inspection......................................................6

Work Place Inspection and Practices ......................... 6

Operation .................................................................... 6

Tip-Over and Falling Hazards .....................................7

Electrical System ........................................................7

Hydraulic System........................................................7

Placards and Decals...................................................8

Chapter 4 – Safety Devices

Emergency Stop Controls...........................................9

Pothole Protector Skids .............................................. 9

Drive/Lift Level Sensor Interlock ...............................10

Emergency Lowering Knob ......................................10

Safety Prop ...............................................................10

Guardrails ................................................................. 10

Lanyard Anchors.......................................................10

Tilt Alarm ................................................................... 11

Horn Button ..............................................................11

Lowering Alarm ......................................................... 11

All Motion Alarm........................................................11

Flashing Lights .........................................................11

Chapter 5 – Gauges and Displays

Display Screen .........................................................13

Hour Meter ............................................................13

Battery Charge Indicator...........................................13

Chapter 7 – Controls

Battery Disconnect ...................................................17

Lower Controls .........................................................17

Start Switch ...........................................................17

Emergency Stop Button ........................................17

Enable Button ........................................................17

Platform Raise/Lower Switch ................................17

Upper Controls .........................................................18

Emergency Stop Button ........................................18

Joystick .................................................................18

Interlock Switch .....................................................19

Steer Switch ..........................................................19

High Speed Drive ..................................................19

Low Speed Drive ................................................... 19

Platform Raise/Lower Button ................................19

Horn Button ...........................................................19

Chapter 8 – Prestart Inspection

Operator’s Manual .................................................... 21

Electrical System ......................................................21

Battery Fluid Level ................................................21

Battery Terminals ...................................................22

Battery Charger ..................................................... 22

Safety Prop ...............................................................22

Cables and Wiring Harness ......................................23

Hydraulic System......................................................23

Fluid Level ............................................................. 23

Hoses, Tubes, and Fittings ....................................23

Tires and Wheels ......................................................23

Lower Control Station ............................................... 24

Operating Controls ................................................24

Emergency Stop ....................................................24

Emergency Lowering ................................................24

Lowering Alarm ......................................................... 25

All Motion Alarm........................................................25

Flashing Lights .........................................................25

Structures .................................................................25

Weldments ............................................................25

Slide Blocks ...........................................................25

Fasteners ..............................................................25

Upper Control Station ............................................... 26

Guardrail System ..................................................26

Platform Extension ................................................26

Lanyard Anchors ...................................................27

Operating Controls ................................................27

Emergency Stop ....................................................28

Horn Button ...........................................................28

Placards and Decals.................................................28

Prestart Inspection Checklist .................................... 31

Chapter 6 – Batteries

General Maintenance ............................................... 15

Charging ................................................................... 15

S2633 – 8210048

Chapter 9 – Operation

Preparing for Operation ............................................ 33

Lower Controls .........................................................33

Upper Controls .........................................................33

Platform ....................................................................34

Raising and Lowering ............................................34

Extending ..............................................................34

Wallboard Loading Gate ........................................35

Table of Contents

Driving and Steering ................................................. 35

Drive Speeds ........................................................36

Drive/Lift Level Sensor Interlock ...........................36

All Motion Alarm........................................................36

Fold Down Guardrails ...............................................36

Swing-Out Trays ....................................................... 38

Chapter 10 – Stowing and Transporting

Stowing ..................................................................... 39

Transporting .............................................................39

Lifting With a Forklift ..............................................39

Driving ...................................................................40

Winching ...............................................................40

Hoisting .................................................................41

Securing for Transport ...........................................42

Chapter 11 – Emergency Operation

Emergency Lowering Knob ......................................43

Towing ...................................................................... 43

Chapter 12 – Troubleshooting

Troubleshooting Chart .............................................. 45

Appendix A – Glossary

Limited Warranty

S2633 – 8210048

Chapter 1 – Introduction

Aerial Platform Features

The aerial platform is a self-propelled scissors lift that
has been designed to raise personnel, their tools, and
material to the workstation. The aerial platform has been
designed for use on hard surface fl oors such as concrete.
The platform is raised and lowered with a hydraulic cylin­der. A hydraulic motor on each of the front drive wheels
provides power to move the aerial platform.

The standard machine includes the following features:

y

39″ (0.99 m) platform extension

y

Fold-down guardrails

y

Wallboard loading gate

y

Entry gate

y

Horn

y

Tilt alarm

y

Proportional drive and lift controls

y

Working height up to 32′ (0.24 m)

y

24 volt DC electrical motor

y

Lowering alarm

y

Level sensor with drive/lift interlock

y

25 amp battery charger

y

Non-marking solid rubber tires

y

Tie-down/lifting lugs

y

Automatic pothole protection system

y

Hour meter

y

Low voltage indicator

y

Swing-out hydraulic and electrical component trays

y

Non-slip metal platform fl oor

y

Forklift loadable from three sides

y

Rear forklift pockets

y

Five year limited warranty

The aerial platform has been manufactured, when ap­plicable, to conform to all applicable requirements of the
following organizations:

y

Occupational Safety and Health Administration
(OSHA)

y

American National Standards Institute (ANSI)

Options

The following options may be provided on the machine:

y

All motion alarm

y

Flashing lights

y

Canadian Standards Association (CSA) certifi cation

Operator’s Manual

This manual provides information for safe and proper
operation of the aerial platform. Some information in this
manual refers to options that may or may not be on your
machine. Read and understand the information in this
Operator’s Manual before operating the aerial platform
on the job.

Additional copies of this manual may be ordered from
Snorkel. Supply the model and manual part number from
the front cover to assure that the correct manual will be
supplied.

All information in this manual is based on the latest
product information at the time of publication. Snorkel
reserves the right to make product changes at any time
without obligation.

Safety Alerts

A safety alert symbol is used throughout this manual to
indicate danger, warning, and caution instructions. Follow
these instructions to reduce the likelihood of personal
injury and property damage. The terms danger, warning,
and caution indicate varying degrees of personal injury
or property damage that can result if the instruction is
not followed.

ADanger

Indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
This signal word is to be used in the most extreme
situations.

AW arning

Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury .

ACaution

Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury . It
may also be used to alert against unsafe practices.

Notes
Notes are used to provide special information or helpful
hints to assist in aerial platform operation, but do not
indicate a hazardous situation.

Operation

The aerial platform has built-in safety features and has
been factory tested for compliance with Snorkel specifi -
cations and industry standards. However, any personnel
lifting aerial platform can be potentially dangerous in the
hands of untrained or careless operators.

AW arning

The potential for an accident increases when the
aerial platform is operated by personnel who are not
trained and authorized. Death or serious injury could
result from such accidents. Read and understand the
information in this manual and on the placards and
decals on the machine before operating the aerial
platform on the job.

Training is essential and must be performed by a quali­fi ed person.

y

Become profi cient in knowledge and actual operation
before using the aerial platform on the job.

y

The operator must be trained and authorized to per­form any functions of the aerial platform.

S2633 – 8210048 1

Chapter 1 – Introduction

Operation of the aerial platform must be within the

y

scope of the machine specifi cations.

The operator bears ultimate responsibility for following
all manufacturer’s instructions and warnings, regulations
and safety rules of their employer and/or any state or
federal law.

Maintenance

Every person who maintains, inspects, tests, or repairs

the aerial platform must be qualifi ed to do so. Following
the daily prestart inspection in this Operator’s Manual will
help keep the aerial platform in optimum working condi­tion. Other maintenance functions must be performed
by maintenance personnel who are qualifi ed to work on
the aerial platform.

ACaution

Welding current can be very intense. Damage to elec­tronic components may result. Connect the ground
clamp as close as possible to the area being welded.
Disconnect battery cables and any microprocessors
and engine control modules before welding on the
machine.

If it becomes necessary to weld aerial platform com­ponents as a method of repair, take all precautions to
prevent damage to electronic circuitry and devices on
the machine. This includes, but may not be limited to,
disconnecting battery cables and electronic devices.

Manual of Responsibilities

All owners and users of the aerial platform must read,
understand, and comply with all applicable regulations.
Ultimate compliance to OSHA regulations is the respon­sibility of the user and their employer.

ANSI publications clearly identify the responsibilities of all
personnel who may be involved with the aerial platform.
A reprint of the “Manual of Responsibilities for Dealers,
Owners, Users, Operators, Lessors and Lessees of

ANSI/SIA A92.6–2006 Self-Propelled Elevating Work
Platforms” is available from Snorkel dealers or from the
factory upon request.

Copies are also available from:

Scaffold Industry Association, Inc.
P. O. Box 20574
Phoenix, AZ 85036-0574 USA

Additional Information

For additional information contact your local dealer or
Snorkel at:

Snorkel International
P.O. Box 1160
St. Joseph, MO 64502-1160 USA
1-800-255-0317

http://www.snorkelusa.com

Do not modify this aerial platform without prior written con­sent of the Snorkel Engineering Department. Modifi cation
may void the warranty, adversely affect stability, or affect
the operational characteristics of the aerial platform.

2 S2633 – 8210048

Component Identifi cation

Operator’s

Manual

Platform

Extension

Tie-Down/Lifting

Chapter 2 – Specifi cations

Lanyard

Guardrails

Upper

Controls

Lugs

Front

Anchors

Controls

Hydraulic Tray

Hydraulic Reservoir • Hydraulic Fluid Filter

Entry

Gate

Toeboards

Platform

Rear

Lower

Wallboard

Loading Gate

Right

Guardrail

Lanyard
Anchors

Scissors

Structure

Rear

Battery Charge

Indicator

Batteries • Charger Plug • Battery Disconnect

Battery Tray

Extension

Guardrails

Front

Left

Guardrail

Front

Guardrail

Chassis

Left Side

Emergency

Lowering Knob

Entry

Step

Tie-Down/Lifting

Lugs

Forklift

Pockets

Right Side

S2633 – 8210048 3

Rear

Chapter 2 – Specifi cations

General Specifi cations

Aerial Platform

Working height 32.5′ (9.93 m)
Maximum platform height 26′ (7.93 m)
Minimum working height 43′ (1.09 m)
Turning radius
Inside 8″ (203 mm)
Wheelbase 74.75″ (1.9 m)
Ground clearance
Pothole protector raised 3.5″ (89 mm)
Pothole protector lowered 3.35″ (85 mm)
Maximum wheel load 1,800 lbs (818 kg)
Maximum ground pressure 137 psi (9.6 kg/cm
Empty vehicle weight (EVW)
Approximate 5,200 lbs (2358 kg)
Width 32.5″ (0.82 m)
Stowed height 86″ (2.19 m)
Rails lowered 78.25″ (1.99 m)
Stowed length
Extension in 92.5″ (2.35 m)
Extension out 128.5″ (3.26 m)
Maximum Chassis Inclination
Side-to-side 1.5 degrees
Front-to-rear 2.5 degrees

Platform

Dimensions
Extension in 28″ x 87″ (.71 m x 2.21 m)
Extension out 28″ x 126″ (.71 m x 3.20 m)
Guardrail height 42.25″ (1.1 m)
Toeboard height 6″ (152 mm)
Rated work load
Total 750 lbs (340 kg)
On extension 250 lbs (110 kg)
Maximum number of occupants
Total 3 people
On extension 1 person

Drive System

Standard Two wheel drive
Gradeability 26% (14.5°)
Maximum drive height 26′ (7.93 m)
Parking brake Dual spring applied
hydraulic release

Tires

Non-marking, solid rubber 15″ (381 mm) diameter

2

)

Electrical System

Voltage 24 V DC
Source Four - 6V 235 Ah batteries
Fluid recommended Distilled water
Battery charger 25 A, 110/220 VAC
Minimum battery weight 66 lb (30 kg)
DC electric motor 4 hp

Hydraulic System

Maximum pressure 3,000 psi (20,700 kPa)
Reservoir capacity 4 US gal (15 l)
Maximum operating temperature 200°F (93°C)
Minimum operating temperature -20°F (-28°C)
Hydraulic fl uid recommended
Above 10°F (-13°C) Mobil DTE-13M (ISO VG32)
Below 10°F (-13°C) Mobil DTE-11M (ISO VG15)

Ambient Air Temperature Operating Range

Fahrenheit 0°F to 110°F
Celsius -18°C to 43°C

Maximum Wind Speed

Gust or steady 28 mph (45 km/h)

Function Speed

Platform raise 42 seconds
Platform lower 40 seconds
Drive speed
High, platform lowered 0.50 mph (0.8 km/h)
Low, platform raised 2.0 mph (3.2 km/h)

4 S2633 – 8210048

Chapter 3 – Safety

Knowledge of the information in this manual, and proper
training, provide a basis for safely operating the aerial plat­form. Know the location of all controls and how they oper­ate to act quickly and responsibly in an emergency.

Safety devices reduce the likelihood of an accident.

y

Never disable, modify, or ignore any safety device.

y

Safety alerts in this manual indicate situations where
accidents may occur.

If any malfunction, hazard or potentially unsafe condition
relating to capacity, intended use, or safe operation is sus­pected, stop aerial platform operation and seek assistance.

The operator bears ultimate responsibility for following
all manufacturer’s instructions and warnings, regulations
and safety rules of their employer and/or any state or
federal law.

Electrocution Hazards

The aerial platform is made of metal components and is
not insulated. Regard all conductors as energized. Do
not operate outside during a thunderstorm.

Minimum Safe Approach Distance

Minimum safe approach distances to energized power
lines and their associated parts must be observed while
operating the aerial platform.

ADanger

The aerial platform is not electrically insulated. Death
or serious injury will result from contact with, or in­adequate clearance from, an energized conductor.
Do not go closer than the minimum safe approach
distance as defi ned by ANSI.

ANSI publications defi ne minimum distances that must
be observed when working near bus bars and energized
power lines. Table 1 and Figure 3 are reprinted courtesy
of Scaffold Industry Association, ANSI/SIA A92.6.

Voltage Range

(Phase to Phase)

0 to 300V Avoid Contact

Over 300V to 50kV 10 3.05

Over 50kV to 200kV 15 4.60

Over 200kV to 350Kv 20 6.10

Over 350kV to 500kV 25 7.62

Over 500kV to 750kV 35 10.67

Over 750kV to 1000kV 45 13.72

Minimum Safe Approach Distance

Feet Meters

Table 1 – Minimum Safe Approach Distance

Figure 3 – Minimum Safe Approach Distance

S2633 – 8210048 5

Chapter 3 – Safety

Prestart Inspection

Perform a prestart inspection before each shift as de­scribed in Chapter 8. Do not use the aerial platform on
the job unless you are trained and authorized to do so.

Work Place Inspection and Practices

Do not use the aerial platform as a ground connection
when welding.

y

The welding ground clamp must be attached to the
same structure that is being welded.

y

Electrical current fl ow can be very intense, causing
serious internal damage to some components.

Inspect the area before and during aerial platform use.
The following are some potential hazards that may be in
the work place:

y

Debris

y

Slopes

y

Drop-offs or holes

y

Bumps and fl oor obstructions

y

Overhead obstructions

y

Unauthorized persons

y

High voltage conductors

y

Wind and weather conditions

y

Inadequate surface and support to withstand load
forces applied by the aerial platform in all operating
confi gurations

Before using the aerial platform in any hazardous (clas­sifi ed) location, make certain it is approved and of the
type required by ANSI/NFPA 505 for use in that particular
location.

Know and understand the job site traffi c-fl ow patterns and
obey the fl agmen, road signs and signals.

While operating the aerial platform, a good safety prac­tice is to have qualifi ed personnel in the immediate work
area to:

y

Help in case of an emergency

y

Operate emergency controls as required

y

Watch for loss of control by platform operator

y

Warn the operator of any obstructions or hazards that
may not be obvious to them

y

Watch for soft terrain, sloping surfaces, drop-offs, etc.
where stability could be jeopardized

y

Watch for bystanders and never allow anyone to be
under, or to reach through the scissors structure while
operating the aerial platform

chassis or platform. Allow suffi cient room and time
to stop movement to avoid contact with structures
or other hazards.

Always look in the direction of movement.

y

Drive with care and at speeds compatible with the
work place conditions.

y

Use caution when driving over rough ground, on
slopes and when turning.

y

Do not engage in any form of horseplay or permit rid­ers any place other than in the platform.

Secure all accessories, containers, tools and other ma­terials in the platform to prevent them from accidentally
falling or being kicked off the platform. Remove all objects
that do not belong in or on the aerial platform.

Never steady the platform by positioning it against an­other platform.

AW arning

The potential for an accident increases when operat­ing an aerial platform that is damaged or malfunction­ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.

Do not operate the aerial platform if it is damaged or not
functioning properly. Qualifi ed maintenance personnel
must correct the problem before putting the aerial platform
back into service.

Operation

Use three points of support when entering or exiting the
platform. For example, use two hands and one foot when
climbing into the platform.

Never cover the platform fl oor grating or otherwise ob-
struct your view below. Make sure the area below the
platform is free of personnel before lowering.

Make sure the area below the platform is free of person­nel before lowering.

Keep both feet positioned fi rmly on the platform fl oor.

y

Operate the controls slowly and deliberately to avoid
jerky and erratic operation.

y

Always stop the controls in neutral before going in the
opposite direction.

ADanger

Pinch points may exist between moving components.

Do not dismount while the aerial platform is in motion or
jump off the platform.

Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure there is suffi cient
clearance around the machine before moving the

6 S2633 – 8210048

Properly stow the aerial platform and secure it against
unauthorized operation at the end of each work day,
before transporting, or if it is left unattended.

Chapter 3 – Safety

Tip-Over and Falling Hazards

Operate the aerial platform only on a fi rm, fl at, level
surface capable of withstanding all load forces imposed
by the aerial platform in all operating conditions. Refer
to the General Specifi cations chart for the maximum
wheel load and drive/lift level sensor interlock informa­tion. Raise the platform only when the aerial platform is
on level ground.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard. Do not
raise the platform outdoors in wind speeds above 28
mph (12.5 m/s).

Do not operate the aerial platform within 4′ (1.2 m) of any
drop-off or hole.

It is best not to transfer from the platform to another
structure or from the structure to the platform, unless
that is the safest way to do the job. Judge each situation
separately taking the work environment into account. If
it is necessary to transfer from the platform to another
structure the following guidelines apply:

1. If you are using a fall restraint, transfer your anchor­age from one structure to the other before stepping
across.

2. Remember that you might be transferring to a struc-

ture where personal fall arrest is required.

Do not climb on the guardrails or use ladders, planks,
or other devices to extend or increase the work position
from the platform.

Take care to prevent rope, electrical cords, and hoses,
etc., from becoming caught in or on the aerial platform.

y

If the platform or scissors structure becomes caught
on an adjacent structure or other obstacle and is
prevented from normal motion, reverse the control to
free the platform.

y

If control reversal does not free the platform, evacuate
the platform before attempting to free it.

Electrical System

Charge the batteries in a well-ventilated area free of
fl ame, sparks, or other hazards that might cause fi re or
explosion.

Do not operate any of the aerial platform functions while
the battery charger is plugged in.

AW arning

Batteries give off hydrogen and oxygen that can
combine explosively. Death or serious injury could
result from a chemical explosion. Do not smoke or
permit open fl ames or sparks when checking the
batteries.

Battery acid can damage the skin and eyes. Serious
infection or reaction could result if medical treatment
is not given immediately. Wear face and eye protec­tion when working near the batteries.

3. Use the platform entrance, do not climb over or
through the guardrails.

Do not operate the aerial platform in windy or gusty condi­tions. Do not add anything to the aerial platform that will
increase the wind loading such as billboards, banners,
fl ags, etc.

Never operate the aerial platform without all parts of the
guardrail system in place and the safety gate closed.
Make sure that all protective guards, cowlings, and doors
are securely fastened.

Do not exceed the platform capacity nor the platform­extension capacity as indicated on the platform rating
placard on the platform. Do not carry loads that extend
beyond the platform guardrails without prior written con­sent from Snorkel.

Do not operate the aerial platform from trucks, trailers, rail­way cars, fl oating vessels, scaffolds, or similar equipment
unless the application is approved in writing by Snorkel.

Do not use the aerial platform as a crane, hoist, jack or
for any purpose other than to position personnel, tools,
and materials.

y

Batteries contain sulfuric acid that can damage your
eyes or skin on contact.

y

Wear a face shield, rubber gloves, and protective
clothing when working around batteries.

y

If acid contacts your eyes, fl ush immediately with clear
water and get medical attention.

y

If acid contacts your skin, wash off immediately with
clear water.

Hydraulic System

The hydraulic system contains hoses with hydraulic fl uid
under pressure.

ADanger

Hydraulic fl uid escaping under pressure can have
enough force to inject fl uid into the fl esh. Serious
infection or reaction will result if medical treatment is
not given immediately . In case of injury by escaping
hydraulic fl uid, seek medical attention at once.

Do not place your hand or any part of your body in front
of escaping hydraulic fl uid. Use a piece of cardboard or
wood to search for hydraulic leaks.

S2633 – 8210048 7

Chapter 3 – Safety

Placards and Decals

The aerial platform is equipped with placards and decals
that provide instruction for operation and accident preven­tion. Do not operate the aerial platform if any placards or
decals are missing, damaged, or illegible.

8 S2633 – 8210048

Chapter 4 – Safety Devices

This aerial work platform is manufactured with safety
devices, placards, and decals to reduce the likelihood
of an accident.

y

For the safety of all personnel, do not disable, modify,
or ignore any safety device.

y

Safety devices are included in the daily prestart
inspection.

AW arning

The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Do not alter,
disable, or override any safety device.

Emergency

Emergency
Stop Button

Stop Button

Figure 4.2 – Upper Controls

If any safety devices are defective, remove the aerial
platform from service until qualifi ed maintenance person-
nel can make repairs.

Emergency Stop Controls

There is an emergency stop control at the lower and
upper controls. Both the lower and upper control emer­gency stop buttons must be on to operate the machine.

At the lower controls, the emergency stop is a two-posi­tion red push button (refer to Figure 4.1).

Emergency

Emergency
Stop Button

Stop Button

Push the emergency stop button inward to disconnect

y

power to the upper control circuits.

y

Twist the button clockwise to restore power.

Pothole Protector Skids

When the platform raise function is actuated at either
the lower or upper controls, the pothole protector skids
automatically lower just before the platform is elevated.
Ground clearance is reduced from 3.5″ (89 mm) to 3.35″
(85 mm) when the skids lock into position (refer to Figure

4.3).

Pothole Protector

Pothole Protector

Skid

Skid

Figure 4.1 – Lower Controls

y

Push the emergency stop button inward to disconnect

Figure 4.3 – Pothole Protector Skid

power to all control circuits.

y

Twist the button clockwise to restore power.

At the upper controls, the emergency stop is a two-posi­tion red push button (refer to Figure 4.2).

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not drive or position the aerial platform for
elevated use within four feet of any drop-off, hole, or

ADanger

other tip-over hazard.

This protection system limits the tilt angle if a wheel is
driven into a drop-off or hole. This greatly reduces the
likelihood of the aerial platform tipping over.

The pothole protection system is for added protection and
does not justify operating near drop-offs or holes.

S2633 – 8210048 9

Chapter 4 – Safety Devices

Drive/Lift Level Sensor Interlock

The aerial platform drive and lift functions are interlocked
through a level sensor system. The drive/lift level sensor
interlock operates when the platform is elevated approxi­mately 6′ (1.8 m).

If the chassis is tilted more than two degrees side-to-side
or front-to-rear, the drive and lift functions will not operate
and an alarm will sound.

Lower the platform and drive to a level surface when the
drive/lift level sensor alarm sounds.

The drive/lift level sensor system is for added protection
and does not justify operating on anything other than fi rm,
fl at, level surfaces.

Safety PropSafety Prop

Figure 4.5 – Safety Prop

Emergency Lowering Knob

The emergency lowering knob may be used to lower
the platform if there is a malfunction in the hydraulic or
electrical system. The knob is mounted at the rear of the
aerial platform (refer to Figure 4.4).

Emergency

Emergency

Lowering Knob

Lowering Knob

Figure 4.4 – Rear of Machine

y

Pull the emergency lowering knob outward to open the
cylinder bleed down valve for emergency lowering.

Safety Prop

The safety prop (refer to Figure 4.5) is used to support
the scissors structure when access to the scissors arm
components or the chassis is required. Always use the
safety prop when the platform is raised during inspection
and maintenance.

Guardrails

The guardrails (refer to Figure 4.6) help protect personnel
from falling off the platform.

The guardrail system includes:

y

A top rail

y

A mid rail

y

An entry gate

y

A wallboard loading gate

y

Toeboards around the sides of the platform.

Wallboard Loading Gate

Wallboard Loading Gate

Entry

Entry

Gate

Gate

Figure 4.6 – Upper Controls

The entry gate allows for access to the platform. The
gate must be securely latched except when personnel
are entering or leaving the platform.

Top Rail

Top Rail

Mid Rail

Mid Rail

Toeboard

Toeboard

The wallboard loading gate can be used for loading work
materials in the platform. The gate must be securely
fastened closed except when personnel are loading or
unloading work materials in the platform.

Lanyard Anchors

Four lanyard anchors for fall restraint anchorage are pro­vided on the fl oor of the platform (refer to Figure 4.7):

10 S2633 – 8210048

Lanyard

Lanyard
Anchors

Anchors

Figure 4.7 – Platform

Note
The lanyard anchors are not designed for lifting or tying
the machine down.

y

All personnel in the platform must connect their fall
restraint device to a lanyard anchor before raising
the platform.

y

Attach only one fall restraint device to each lanyard
anchor.

Chapter 4 – Safety Devices

Horn Button

The horn button may be used to warn personnel on the
ground. The horn button is located on the upper control
panel (refer to Figure 4.8).

HornHorn

Figure 4.8 – Upper Controls

Lowering Alarm

When the aerial platform is lowered, the alarm emits a
loud beeping sound to warn personnel in the work area
to stand clear.

y

Do not use the lanyard anchors for personal fall ar­rest anchorage.

Tilt Alarm

If the aerial platform chassis is out of level more than
2 degrees side-to-side or front-to-rear when the platform
is raised, an alarm will sound.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard.

Completely lower the platform and drive to a level surface
when the tilt alarm sounds.

The tilt alarm is for added protection and does not
justify operating on anything other than fi rm, fl at, level
surfaces.

ADanger

Pinch points exist on the machine. Death or serious
injury will result if the platform lowers onto personnel.
Stand clear while raising and lowering the platform.

Be careful when lowering the platform. Keep hands and
fi ngers away from the machine components.

All Motion Alarm

An optional all motion alarm may be provided on the
machine. The alarm sounds, in short beeps, anytime the
machine functions are being operated. The alarm is used
to warm personnel in the work area to stand clear.

Flashing Lights

The optional fl ashing lights are mounted on each side of
the machine and may be used to warn personnel that the
aerial platform is in the area.

The lights fl ash at approximately one fl ash per second
when the machine is operated from the upper or lower
controls.

S2633 – 8210048 11

Chapter 4 – Safety Devices

12 S2633 – 8210048

Chapter 5 – Gauges and Displays

The aerial platform is equipped with a display screen, an
hour meter and a battery charge indicator to monitor the
condition of the machine before and during operation.

Display Screen

An LED display screen is located on the upper control
panel (refer to Figure 5.1).

Emergency

Emergency

Stop Button

Stop Button

Display Screen

Display Screen

Figure 5.1 – Upper Controls

The display screen shows:

5. Push the emergency stop button inward.

Battery Charge Indicator

The battery charge indicator is located at the right side of
the chassis (refer to Figure 5.2). When the batteries are
charging, the battery charge indicator displays the level
of charge in the batteries.

Battery Charge

Battery Charge

Indicator

Indicator

Figure 5.2 – Battery Tray

y

general operators information.

y

fault codes used to locate and eliminate situations
where machine operation may be interrupted.

Note
Refer to Chapter 12 for a list of fault codes.

Hour Meter

The hour meter is part of the digital display on the upper
control panel (refer to Figure 5.1). It measures the ac­cumulated aerial platform operating time.

To view the hour meter reading:

1. From the lower controls, twist the emergency stop
button clockwise to the on position and turn the start
switch on.

2. From the upper controls, push the emergency stop
button inward.

3. Press and hold the platform raise/lower and horn but­tons and twist the emergency stop button to restore
power. The display should now have “hr” shown.

4. Press the right side of the steer switch to scroll
through the hour meter reading, two digits at a
time.

For example, if pressing the switch slowly three times

displays “10” followed by “40” and then “hr” after the
third time, the accumulated aerial platform operating
time is 1,040 hours.

S2633 – 8210048 13

Chapter 5 – Gauges and Displays

14 S2633 – 8210048

Chapter 6 – Batteries

The battery tray on the right side of the chassis, contains
four, 235 amp, 6 volt batteries to operate the aerial plat­form drive and control systems.

To access the batteries, pull the latch on the battery tray
outward and swing the tray open.

For optimal battery performance the battery fl uid level
must be maintained and the battery connections must
be kept clean.

General Maintenance

Always keep the batteries clean, free of dirt and corrosion.
A fi lm on top of the battery can accelerate discharge.

AW arning

Battery acid can damage the skin and eyes. Serious
infection or reaction could result if medical treatment
is not given immediately. Wear face and eye protec­tion when working near the batteries.

If necessary, clean the batteries, terminals, and cable
ends (refer to Figure 6.1) with a wire brush or terminal
cleaning tool.

Charging

The aerial platform is equipped with a 25 amp automatic
battery charger that will completely recharge the batteries
and turn off after the charge cycle is completed. The bat­tery charger is located on the right side of the chassis.

AW arning

Batteries give off hydrogen and oxygen that can com­bine explosively. Death or serious injury can result
from a chemical explosion. Charge the batteries only
in a well ventilated area away from sparks or fl ame.

ACaution

The batteries may be overcharged and/or damaged
if the charger fails to shut off automatically. Do
not leave the battery charger on for more than two
days.

It may take from 1½ to 16 hours to recharge the batteries
depending on the amount of discharge. If the charging
cycle exceeds 16 hours without the batteries being fully
recharged, unplug the charger and have the batteries
checked.

Fully recharge the batteries, immediately after use.

Battery

Battery

Disconnect

Disconnect

Caps

Caps

Terminals

Terminals

Figure 6.1 – Battery Tray

Use distilled water to refi ll the batteries. Avoid water
containing metallic solids such as iron which can reduce
the life of the batteries.

Consult a battery charger specialist if extreme tempera­ture use is unavoidable.

y

Cold reduces battery capacity and retards charging.

y

Heat increases water usage and can result in over­charging.

y

Very high temperatures can cause thermal run away
which may lead to an explosion or fi re.

y

One charging cycle per day is preferred.

y

Fully charged batteries perform best.

y

The deeper the discharge, the fewer number of cycles
a battery will deliver. Deep discharges deteriorate the
battery quicker than light shallow cycles.

y

An overly discharged battery may need to be cycled
a few times before it can fully recover.

y

If a battery begins to heat before becoming fully
charged, it may be necessary to recharge and dis­charge the battery a few times.

Use the following procedure to charge the batteries.

1. At the lower controls, turn the start switch to the off
position.

2. Open the battery tray on the right side of the chassis.
Make sure the battery disconnect is fully connected
(refer to Figure 6.1).

3. Remove the caps from each battery (refer to Figure

6.1).

4. Visually check the battery fl uid level making sure the
level is within ¼″ (6 mm) of the bottom of the fi ller neck
inside each hole. If needed, add distilled water.

5. Tightly replace the caps on each battery, and close
the battery tray.

S2633 – 8210048 15

Chapter 6 – Batteries

6. Plug the battery charger plug (refer to Figure 6.2) into
a properly grounded outlet (115 volt AC, 60 Hz) using
a 3 conductor, 12 gauge or larger extension cord.
The extension cord must be as short as possible (no
longer than 50′) and in good electrical condition.

Battery Charge

Battery Charge

Plug

Plug

Battery Charge

Battery Charge

Indicator

Indicator

Figure 6.2 – Battery Tray

Note
Do not operate any of the aerial platform functions while
the battery charger is plugged in.

8. Leave the battery charger plugged in until it shuts
itself off.

Note
If the charging cycle exceeds 16 hours without the bat­teries being fully recharged, unplug the charger and have
the batteries checked.

9. After the battery charger turns itself off, unplug the
extension cord from the battery charger and allow
the batteries to cool.

10. Open the battery tray on the right side of the chas­sis and remove the caps from each battery (refer to
Figure 6.1).

11. Visually check the battery fl uid level making sure the
level is within ¼″ (6 mm) of the bottom of the fi ller neck
inside each hole. If needed, add distilled water.

12. Tightly replace the caps on each battery, and close
the battery tray.

7. Visually inspect the battery charge indicator for proper
charging rate (refer to Figure 6.2).

y

The charger will turn on three to fi ve seconds after
a complete electrical connection is made.

y

As the batteries become charged, the indicator
light for each level of charge will blink until its level
is reached and then it will remain lit.

y

When the batteries are fully charged, all three
lights on the battery charge indicator will be lit.

16 S2633 – 8210048

Chapter 7 – Controls

ADanger

Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure all personnel stand
clear while operating the aerial platform.

y

Controls to position the platform are located on the
lower control panel on the chassis and on the upper
control panel in the platform.

y

Controls to drive the aerial platform are located on the
upper control panel only.

Start

Start

Switch

Switch

Enable Button

Enable Button

Platform Raise/Lower Switch

Platform Raise/Lower Switch

Emergency

Emergency

Stop Button

Stop Button

Battery Disconnect

The battery disconnect plug is located inside the battery
tray (refer to Figure 7.1).

Battery Disconnect PlugBattery Disconnect Plug

Figure 7.1 – Battery Tray

The battery disconnect removes electrical power from all
electrically controlled functions when it is unplugged.

y

Plug in the connector to electrically connect the bat­teries to the electrical system.

Lower Controls

The lower controls (refer to Figure 7.2) are located on
the left side of the chassis. Only platform functions can
be operated from the lower controls.

Figure 7.2 – Lower Controls

The following are located on the lower control panel:

Start switch

y
y

Emergency stop button

y

Enable button

y

Platform raise/lower switch

Start Switch

The start switch (refer to Figure 7.2) connects power to
all control circuits with a key switch.

y

Turn the switch to the on position to connect the elec­trical power to the lower and upper controls.

y

When the machine is not in use, turn the switch to the
off position to preserve the battery charge.

Emergency Stop Button

The emergency stop (refer to Figure 7.2) is a two-position
red push button.

y

Push the button inward to disconnect power to all
control circuits.

y

Twist the button clockwise to restore power.

Both the lower and upper control emergency stop buttons
must be on to operate the machine.

Enable Button

The enable button (refer to Figure 7.2) must be pressed
when operating the platform raise or lower from the
lower controls. The button is spring returned to the off
position.

y

Hold the button inward continually to operate the
machine from the lower controls.

Platform Raise/Lower Switch

The platform raise/lower switch (refer to Figure 7.2) is
used to raise or lower the platform. The switch is spring
returned to the center off position.

S2633 – 8210048 17

Chapter 7 – Controls

Hold the switch upward to raise the platform.

y

Hold the switch downward to lower the platform.

y

An alarm will sound as the platform lowers.

y

Upper Controls

The upper controls (refer to Figure 7.3) are located on the
control panel at the platform. Platform and drive functions
can be operated from the upper controls.

Emergency

Emergency

Stop Button

Stop Button

Interlock Switch

Interlock Switch

Upper Controls

Upper Controls

Left

Left

Guardrail

Guardrail

Figure 7.4 – Upper Control Operating Position

Platform

Platform

Raise/Lower Button

Raise/Lower Button

Steer

Steer

Switch

Low Speed Drive

Low Speed Drive

High Speed Drive

High Speed Drive

Horn

Horn

Joystick

Joystick

Switch

Figure 7.3 – Upper Controls

AW arning

The potential for an accident increases from improp­erly driving or steering the aerial platform. Death
or serious injury could result from such accidents.
Make sure the upper control panel is at the front of
the platform, hooked on the guardrail, and hanging
inside the platform with the red upper control box
arrow facing the front of the platform.

Avoid driving the platform with the upper controls facing
the rear or side of the machine. In this position the ma­chine is diffi cult to control because the drive and steer
control movements and their resulting machine move-

ments will not correspond.

Only operate from the upper controls when it is at the
front of the platform, hooked on the guardrail, and hang­ing inside the platform with the red upper control box
arrow facing the front of the platform (refer to Figure

7.4). In this position the guardrail and upper control box

arrows will point the same direction, towards the front of
the machine.

The following controls are located on the upper control
panel:

y

Emergency stop button

y

Joystick

y

Interlock switch

y

Steer switch

y

High speed drive button

y

Low speed drive button

y

Platform raise/lower button

y

Horn

Emergency Stop Button

The emergency stop (refer to Figure 7.3) is a two-position,
red push button on the top of the upper control panel.

y

Push the button inward to disconnect power from all
control circuits at the upper controls.

y

Twist the button clockwise to restore power.

y

Push the emergency stop button inward when the
upper controls are not in use to protect against unin­tentional operation.

Both the lower and upper control emergency stop buttons
must be on to operate the machine.

Joystick

The joystick (refer to Figure 7.3) is used to either drive
the aerial platform or to raise and lower the platform after
selecting the appropriate function.

y

Press the high or low speed drive button to use the
joystick to drive the aerial platform.

y

Press the platform raise/lower button to use the joy­stick to operate the platform functions.

Movement of the joystick in a given direction produces
a corresponding movement of the aerial platform. The
steering and drive functions may be operated separately
or simultaneously.

18 S2633 – 8210048

Chapter 7 – Controls

Interlock Switch

The joystick has an interlock switch in the handle (refer
to Figure 7.3).

y

Engage the interlock by grasping the joystick and
pulling the switch toward the handle.

y

Engage the interlock to activate the steering, drive,
or lift.

Steer Switch

The steer switch (refer to Figure 7.3) is a momentary
contact, rocker switch on top of the drive joystick. This
switch controls the two front wheels to steer the aerial
platform.

y

To steer to the right, engage the interlock switch on
the joystick and hold down the right side of the steer
switch.

y

To steer to the left, engage the interlock switch on
the joystick and hold down the left side of the steer
switch.

Note
The steering wheels are not self-centering. Set the steer­ing wheels straight ahead after completing a turn.

Note
The drive range operates in low when the platform is
out of the stowed position, regardless of the drive speed
button selected.

Platform Raise/Lower Button

The platform raise/lower button (refer to Figure 7.3) is
used with the joystick to raise and lower the platform.

y

To raise the platform press the platform raise/lower
button and then push the joystick forward, the direc­tion of the red arrow.

y

To lower the platform press the platform raise/lower
button and then pull the joystick backward, the direc­tion of the yellow arrow. An alarm will sound as the
platform lowers.

Note
The platform will not raise or lower while driving.

Horn Button

The horn button (refer to Figure 7.3) is at the bottom of
the upper control panel.

Press the button to sound the horn.

High Speed Drive

The high speed drive button (refer to Figure 7.3) is used
to set the drive speed to high (2.0 mph [3.2 km/h]) while
the platform is in the stowed position.

y

Select the high speed drive button to double the top
speed of the machine.

y

To drive the platform forward at high speed, press the
high speed drive button and then push the joystick
forward, the direction of the red arrow.

y

To drive the platform in reverse at high speed, press
the high speed drive button and then pull the joystick
backward, the direction of the yellow arrow.

Low Speed Drive

The low speed drive button (refer to Figure 7.3) is used
to set the drive speed to low (0.50 mph [0.8 km/h]).

y

Select the low drive speed button when working in
close quarters, climbing grades, or when unfamiliar
with the machine operation.

y

To drive the platform forward at low speed, press the
low speed drive button and then push the joystick
forward, the direction of the red arrow.

y

To drive the platform in reverse at low speed, press
the low speed drive button and then pull the joystick
backward, the direction of the yellow arrow.

S2633 – 8210048 19

Chapter 7 – Controls

20 S2633 – 8210048

Chapter 8 – Prestart Inspection

Potential service and safety problems may be detected
by inspecting the aerial platform. This chapter includes
information on properly inspecting the aerial platform and
includes a prestart inspection check list at the end of this
chapter to ensure that no areas are overlooked.

AW arning

The potential for an accident increases when operat­ing an aerial platform that is damaged or malfunction­ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.

Perform a prestart inspection at the beginning of each
shift, before using the aerial platform on the job. The
inspection site must have a smooth and level surface.

Battery

Battery

Disconnect

Disconnect

Terminals

Terminals

Figure 8.2 – Battery Tray

Caps

Caps

Operator’s Manual

The manual holder is located at the front of the platform
(refer to Figure 8.1).

Operator’s Manual

Operator’s Manual

Holder

Holder

Figure 8.1 – Operator’s Manual Holder

To inspect the operator’s manual and manual holder:

1. Make certain the Operator’s Manual holder is se­curely fastened in place.

2. Check to see that the proper Operator’s Manual is in
the holder.

3. Check to see that the manual is complete with all
pages intact and in readable condition.

4. Make certain ANSI publication “Manual of Respon­sibilities for Dealers, Owners, Users, Operators,

Lessors and Lessees of ANSI/SIA A92.6–2006 Self­Propelled Elevating Work Platforms” must also be in
the manual holder.

Electrical System

Electrical power is supplied from four 235 amp hour,
6 volt batteries. The batteries are in the tray at the right
side of the machine (refer to Figure 8.2). The batteries
supply 24 volt DC electrical power to operate the aerial
platform electrical and electrohydraulic components.

AW arning

Batteries give off hydrogen and oxygen that can
combine explosively. Death or serious injury could
result from a chemical explosion. Do not smoke or
permit open fl ames or sparks when checking the
batteries.

ACaution

Even with low voltage electrical systems, severe
arcing can occur. Electrical shock or component
damage may result from contact with energized
conductors. Use caution when working with any
electrical device.

For optimal battery performance the battery fl uid level
must be maintained and the battery connections must
be kept clean.

Battery Fluid Level

To inspect the battery fl uid level:

1. Remove the caps from the batteries (refer to Figure

8.2).

2. Visually check the battery fl uid level making sure the
level is ¼″ (6 mm) above the plates.

3. If necessary, add distilled water.

Note
Use only distilled water when refi lling the battery. Tap
water may contain metallic solids such as iron which can
reduce the life of the battery .

4. Replace the caps on the battery. The caps must be in
place and tight during machine operation and battery
charging.

S2633 – 8210048 21

Chapter 8 – Prestart Inspection

Battery Terminals

To inspect the battery terminals:

1. Check the top of the battery, the terminals, and cable
ends. They should be clean and free of corrosion
(refer to Figure 8.2).

2. If necessary, clean the top of the battery. Clean the
terminals and cable ends with a wire brush or terminal
cleaning tool.

3. Make sure all cable ends are securely fastened to
the terminals.

Battery Charger

Inspect the battery charger to ensure that it is operating
properly.

1. Open the battery tray on the right side of the chassis.
Make sure the battery disconnect plug is fully con­nected (refer to Figure 8.2).

2. Plug the charger into a source of power.

Observe the LED’s on the charger (refer to Figure 8.3).

3.
They indicate the level of charge on the batteries.

Use the following procedure to properly position the
safety prop:

1. Remove all tools and material from the platform.

2. Using the lower controls, raise the platform until the
open height between the arm pins is wide enough to

position the safety prop (approximately 7′ [2.1 m]).

3. Rotate the safety prop downward from the storage
position to the support position (refer to Figure 8.4).

Safety PropSafety Prop

Battery Charge

Battery Charge

Plug

Plug

Battery Charge

Battery Charge

Indicator

Indicator

Figure 8.3 – Battery Tray

4. Unplug the charger.

Safety Prop

Always use the safety prop when the platform is raised
before inspecting or performing service or maintenance
procedures on the machine.

ADanger

Pinch points exist on the scissors structure. Death
or serious injury will result if the scissors structure
drops onto personnel working within the scissors
arms or under the raised platform. Properly position
the safety prop before reaching through the scissors
structure.

Figure 8.4 – Safety Prop

4. Remove hands and arms from the scissors structure
area.

5. Lower the platform until the scissors are supported
by the safety prop.

Use the following procedure to stow the safety prop:

1. Using the lower controls, raise the platform until the
open height between the arm pins is wide enough
to move the safety prop (approximately 7′ [2.1 m])
(refer to Figure 8.4).

2. Rotate the safety prop upward to the stowed position
(refer to Figure 8.5).

Safety PropSafety Prop

Figure 8.5 – Safety Prop

22 S2633 – 8210048

Chapter 8 – Prestart Inspection

3. Using the lower controls completely lower the plat­form.

Cables and Wiring Harness

To inspect the cables and wiring harness:

1. Visually inspect all cables and wiring for wear and/or
physical damage such as loose connections, broken

wires, and frayed insulation.

2. Check the wiring in areas where a change in routing
direction may cause them to become pinched.

3. Make sure the cables and wires are properly routed
to avoid sharp edges, pinching, and scuffi ng.

Hydraulic System

Hydraulic power is supplied from a single stage hydraulic
pump with a 4 horsepower DC electric motor.

ADanger

Hydraulic fl uid escaping under pressure can have
enough force to inject fl uid into the fl esh. Serious
infection or reaction will result if medical treatment is
not given immediately . In case of injury by escaping
hydraulic fl uid, seek medical attention at once.

The hydraulic reservoir is inside the hydraulic tray on the
left side of the chassis.

Fluid Level

To inspect the fl uid level:

1. Make sure the aerial platform is fully stowed on a
level surface.

ACaution

Not all hydraulic fl uid is suitable to use in the hydrau-
lic system. Some have poor lubricating character­istics and may increase component wear. Only use
hydraulic fl uid as recommended.

4. If necessary, add fl uid of the proper type.

Note
Refer to Chapter 2 for the proper type and grade of
hydraulic fl uid to use. The need to regularly add fl uid
indicates a leak that should be corrected.

5. Replace the cap making sure it is tightly in place.

Hoses, Tubes, and Fittings

To inspect the hoses, tubes and fi ttings:

1. Inspect all hydraulic hoses, tubes, and fi ttings for
wear, leakage, or damage (refer to Figure 8.6).

2. Make sure the hoses are properly routed to avoid
sharp edges, kinking, and scuffi ng.

3. Inspect the tubes for dents or other damage that may
restrict fl uid fl ow.

4. Make sure all hoses and tubes are held fi rmly in their
support brackets.

5. Check under the chassis for fl uid that has leaked. Hy-
draulic fl uid leaks are easily visible on the ground.

Tires and Wheels

Visually inspect the tires and wheels (refer to Figure 8.7)
to make sure they are suitable for service.

2. Open the hydraulic tray on the left side of the chas­sis to access the hydraulic fl uid tank (refer to Figure

8.6).

Filler Cap

Filler Cap

Hydraulic Fluid

Hydraulic Fluid

Tank

Tank

To inspect the tires and wheels:

Figure 8.6 – Hydraulic Tray

3. Remove the fi ller cap and check the fl uid level on the
dipstick. The fl uid should be between the minimum
and maximum lines.

S2633 – 8210048 23

1. Visually inspect the tires. They should be smooth
without any cuts, gouges, or missing rubber that
might affect aerial platform stability.

Figure 8.7 – Tires and Wheels

Chapter 8 – Prestart Inspection

2. Check the wheels to see that the fasteners are in
place and are not damaged or loose.

Lower Control Station

With no personnel or materials in the platform, test the
operation of each control from the lower controls (refer
to Figure 8.8).

Emergency

Enable Button

Enable Button

Start

Start

Switch

Switch

Figure 8.8 – Lower Controls

Operating Controls

Use the following procedure to operate and test the ma­chine from the lower controls:

Platform Raise/Lower Switch

Platform Raise/Lower Switch

Emergency

Stop Button

Stop Button

1. Push the emergency stop button inward to turn off
electrical power.

2. Test the lower control functions to make sure they no
longer operate.

Emergency Lowering

Use the following procedure to test the emergency lower­ing system:

ADanger

Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Stand clear of moving
components while test operating the machine.

1. Use the lower controls to raise the platform approxi­mately 3′ (1 m).

2. Locate the emergency lowering knob at the rear of
the chassis (refer to Figure 8.9).

1. Make sure the battery disconnect is plugged in.

2. At the lower and upper controls, twist the button
clockwise.

3. Insert the key into the start switch and turn the switch
to the on position.

4. Press and hold the enable button.

ADanger

Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure all personnel stand
clear of the aerial platform while performing the pre­start inspection.

AW arning

The potential for an accident increases when operat­ing an aerial platform that is damaged or malfunction­ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.

5. Test the operation of the platform raise/lower switch
in both directions.

Emergency

Emergency

Lowering Knob

Lowering Knob

Figure 8.9 – Rear of Machine

ADanger

Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Make sure all person­nel stand clear while lowering the platform with the
emergency lowering knob.

3. Make sure there is nothing in the way to obstruct the
platform when it lowers.

4. Slowly pull the emergency lowering knob outward
to open the bleed down valve. The platform should
slowly lower.

5. Release the knob to stop the platform from lower­ing.

Emergency Stop

To test the emergency stop button from the lower
controls:

24 S2633 – 8210048

Chapter 8 – Prestart Inspection

AW arning

The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Fully close
the emergency lowering valve before operating the
aerial platform.

6. Make certain the knob is fully released and the emer­gency lowering valve is fully closed before operating
the aerial platform.

Lowering Alarm

The machine is equipped with a lowering alarm. Lower
the platform to ensure that the alarm sounds to warn

personnel in the area to stand clear.

All Motion Alarm

The machine may be equipped with an all motion
alarm.

Operate the machine functions to ensure that the alarm
sounds to warn personnel in the area that the aerial

platform is in motion.

Flashing Lights

The machine may be equipped with optional fl ashing
lights mounted on each side of the machine.

3. Look for visible cracks in the welds and at the weld
to parent material joints. A bright light may be used
to provide adequate visibility of the inspection area.

Slide Blocks

To inspect the slide blocks:

1. Visually inspect the scissors arm slide blocks. They
must be free to move without obstruction. There are
two slide blocks at the rear of the chassis (refer to
Figure 8.10).

Slide BlocksSlide Blocks

Figure 8.10 – Rear of Machine

To inspect the fl ashing light:

1. At the lower controls, twist the emergency stop button
clockwise and turn the start switch on.

2. At the upper controls, twist the emergency stop button
clockwise.

3. Operate any control function and visually check to
see that the light is fl ashing approximately one fl ash
per second.

Note
There is not an off switch for the fl ashing light.

Structures

Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.

Weldments

To inspect the weldments:

1. Visually inspect all weldments for abnormal wear,
abrasion, or deformation that could cause interfer­ence between moving parts.

2. Inspect the welds on the structural components.
Pay particular attention to boom welds. The area to
be inspected should be clean and free of dirt and
grease.

2. Raise the platform from the lower controls and visually
inspect the slide blocks underneath the rear of the
platform. They must be free to move without obstruc­tion. There are two slide blocks underneath the rear
of the platform (refer to Figure 8.11).

Slide BlocksSlide Blocks

Figure 8.11 – Rear of Platform

Fasteners

To inspect the fasteners:

1. Visually inspect all fasteners to see that none are
missing or loose.

2. Inspect all of the bolts, nuts, rollpins, collars, and
snap rings. They should all be present, tight, and not
damaged in any way.

S2633 – 8210048 25

Chapter 8 – Prestart Inspection

Upper Control Station

Inspect the platform and upper controls only if all functions
operated properly from the lower controls.

Guardrail System

The guardrail system includes (refer to Figure 8.12):

y

A top rail

y

A mid rail

y

An entry gate

y

A wallboard loading gate

y

Toeboards around the sides of the platform.

Wallboard Loading Gate

Wallboard Loading Gate

Entry

Entry

Gate

Gate

Top Rail

Top Rail

Mid Rail

Mid Rail

Toeboard

Toeboard

Foot Lever

Foot Lever

Pin

Pin

Front Stop

Rear Stop

Rear Stop

Mid Stop

Mid Stop

Front Stop

Figure 8.13 – Platform Extension

2. While facing the front of the platform, step down on
the foot lever and pull the top rail of the extension
deck backward until the pin engages the mid or rear
stop (refer to Figure 8.13).

3. Inspect spacers on the platform extension (refer to
Figure 8.14). They must be in place and in good
condition.

Figure 8.12 – Upper Controls

To inspect the guardrail system:

1. Visually inspect all components of the guardrail
system. Make sure the rails and toeboards are all in
place and free of any damage or deformation.

2. Visually check the rail and toeboard welds for
cracks.

3. Visually check all bolts and nuts fastening the platform
and guardrails in place. They must be present and
not show any signs of looseness.

4. Inspect the wallboard loading gate and entry gate to
see that they are present, swing freely, close fi rmly,
and are not deformed in any way. Make sure the
gates are secure when they are closed.

Platform Extension

ACaution

The extension deck is free to move when the foot
lever is depressed. Personal injury may result from
extending the platform deck while the aerial platform
is on a slope. Do not attempt to extend or retract
the platform unless the aerial platform is on a level
surface.

Spacers

Spacers

Rollers

Rollers

Platform

Spacer

Spacer

Roller

Roller

To inspect the platform extension:

1. Inspect the foot lever (refer to Figure 8.13) to ensure

Figure 8.14 – Platform Spacers and Rollers

Platform Extension

that it releases the pin to extend the platform.

26 S2633 – 8210048

Chapter 8 – Prestart Inspection

4. Inspect rollers on the platform extension (refer to
Figure 8.14). They must be in place, in good condi­tion, and free to move without obstruction.

5. Inspect the weldments for deformation and damage.
Try to move the rails back and forth to make sure the
platform extension deck is locked in position.

6. Visually check the platform welds for cracks.

7. While facing the front of the platform, depress the foot
lever and grasp the top rail of the extension deck. Pull
backward to retract the deck until the pin engages
the rear stop (refer to Figure 8.13).

8. Make sure the platform extension deck is locked in
position.

Lanyard Anchors

There are four lanyard anchors on the fl oor of the platform
(refer to Figure 8.15):

chine is diffi cult to control because the drive and steer
control movements and their resulting machine move-

ments will not correspond.

Only operate from the upper controls when it is at the front
of the platform, hooked on the guardrail, and hanging
inside the platform with the red upper control box arrow

facing the front of the platform (refer to Figure 8.16). In

this position the guardrail and upper control box arrows
will point the same direction, towards the front of the
machine.

Upper Controls

Upper Controls

Left

Left

Guardrail

Guardrail

Lanyard

Lanyard
Anchors

Anchors

Figure 8.15 – Platform

To inspect the lanyard anchors:

1. Visually inspect the lanyard anchors to make sure
they are in place and are not deformed.

2. Look for visible cracks in the welds and at the weld
to parent material joints. A bright light may be used
to provide adequate visibility of the inspection area.

Operating Controls

AW arning

The potential for an accident increases from improp­erly driving or steering the aerial platform. Death
or serious injury could result from such accidents.
Make sure the upper control panel is at the front of
the platform, hooked on the guardrail, and hanging
inside the platform with the red upper control box
arrow facing the front of the platform.

Avoid driving the platform with the upper controls facing
the rear or side of the machine. In this position the ma-

Figure 8.16 – Upper Control Operating Position

Use the following procedure to operate and test the ma­chine from the upper controls:

1. Make sure the battery disconnect is plugged in.

2. At the lower controls, twist the emergency stop button
clockwise.

3. Insert the key into the start switch and turn the switch
to the on position.

4. At the upper controls (refer to Figure 8.17), twist the
emergency stop button clockwise.

Emergency

Emergency

Stop Button

Stop Button

Platform

Platform

Raise/Lower Button

Raise/Lower Button

Low Speed Drive

Low Speed Drive

High Speed Drive

High Speed Drive

Horn

Horn

Interlock Switch

Interlock Switch

Steer

Steer

Switch

Switch

Joystick

Joystick

Figure 8.17 – Upper Controls

S2633 – 8210048 27

Chapter 8 – Prestart Inspection

AW arning

The potential for an accident increases when operat­ing an aerial platform that is damaged or malfunction­ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.

5. Test the interlock switch by moving the joystick with­out engaging the interlock switch.

If movement occurs the interlock is not functioning

properly. Do not operate the machine until the prob­lem is corrected.

6. Select the high speed drive button. Test the operation
of the joystick in both directions.

The drive speed should increase as the joystick

y

is pushed farther forward.

7. Select the low speed drive button. Test the operation
of the joystick in both directions.

The drive speed should increase as the joystick

y

is pushed farther forward.

8. Squeeze and hold the interlock switch against the
joystick. Test the steer switch in both directions using
the steering switch.

To steer to the right, hold down the right side of

y

the steer switch.

Press the horn button to ensure that it sounds to warn
personnel in the area.

Placards and Decals

To inspect the placards and decals:

1. Inspect all safety and operational placards and de­cals. Make certain they are in place, in good condi­tion, and are legible.

2. Clean the placards and decals with soap and water,
and a soft cloth if the words or pictures cannot be
seen.

ACaution

Solvents may contain hazardous ingredients. Follow
the manufacturer’s label for proper use and disposal.
Wear protective gloves and splash-proof safety
glasses when using solvents.

3. Remove wet paint overspray with a natural biode­gradable solvent and a soft cloth.

4. Replace any missing, damaged, or illegible placards
or decals before operating the aerial platform.

Placard and decal kits are available from Snorkel.

The safety related placards and decals are illustrated on
the following pages.

To steer to the left, hold down the left side of the

y

steer switch.

9. Select the platform raise/lower button. Squeeze and
hold the interlock switch against the joystick. Test the
joystick in both directions.

To raise the platform, push the joystick forward,

y

the direction of the red arrow.

To lower the platform, pull the joystick backward,

y

the direction of the yellow arrow.

Emergency Stop

To test the emergency stop button from the upper con­trols:

1. At the upper controls, push the emergency stop but­ton inward to turn off electrical power.

2. Verify that the upper control platform and drive func­tions do not operate.

Horn Button

The horn is operational when the machine is set up for
operation from the upper control panel (refer to Figure

8.17).

28 S2633 – 8210048

101251-000

Chapter 8 – Prestart Inspection

101251-000

508766-000

101250-005

508766-000

101250-005

101250-005

066553-000

Left Side

066556-001

066553-000

066556-001

500771-000

066552-000

066556-001

500771-000

066552-000

066556-001

066553-000

066556-000

Right Side

066556-000

S2633 – 8210048 29

Chapter 8 – Prestart Inspection

508772-000

062562-001

Rear

508772-000

06555-000

06555-000

Hydraulic Tray – Inside

062562-001

508770-000

Battery Tray – Inside

508770-000

066550-000

Upper Controls

066550-000

Manual Holder

30 S2633 – 8210048

Chapter 8 – Prestart Inspection

Prestart Inspection Checklist

Item Inspect For OK
Operator’s Manual In place, all pages readable and intact
Electrical System

Battery fl uid level Proper level
Battery terminals Clean, connectors tight
Battery charger Proper operation
Cables and wiring harness No wear or physical damage

Hydraulic System

Fluid level Between minimum and maximum marks, cap in place and tight
Hoses, tubes and fi ttings No leaks, all fi ttings tight

Tires Good condition
Wheels All fasteners present with no signs of looseness.
Lower Control Station

Operating controls Proper operation
Emergency stop Shuts off lower controls/proper operation

Emergency Lowering Proper operation
All Motion Alarm Sounds when machine is operated and/or driven
Lowering Alarm Sounds when platform is lowered
Safety Prop No damage or deformation
Structures

Weldments – Chassis, platform, etc. Welds intact, no damage or deformation
Slide blocks In place, no damage or deformation
Fasteners In place, tight, and no damage
Rollers and spacers In place, no damage or deformation

Upper Control Station

Guardrail system Welds intact, no damage or deformation

All fasteners in place, no loose or missing parts
Entry gate In place, no damage or deformation, proper operation
Wallboard loading gate In place, no damage or deformation, proper operation
Lanyard anchors In place, no damage or deformation
Platform extension Proper operation, no damage or deformation
Platform fl oor No damage or deformation, clean to prevent slip and fall hazards
Operating controls Proper operation
Emergency stop Shuts off upper controls/proper operation
Horn Sounds when activated

Placards and Decals In place and readable

S2633 – 8210048 31

Chapter 8 – Prestart Inspection

32 S2633 – 8210048

Chapter 9 – Operation

The aerial platform may be operated from either the lower
or upper controls.

ADanger

The aerial platform is not electrically insulated. Death
or serious injury will result from contact with, or in­adequate clearance from, an energized conductor.
Do not go closer than the minimum safe approach
distance as defi ned by ANSI.

Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure there is suffi cient
clearance around the machine before moving the
chassis or platform. Allow suffi cient room and time
to stop movement to avoid contact with structures
or other hazards.

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over
accident. Operate the aerial platform on a fi rm, fl at,
level surface. Avoid travel speeds and/or rough ter­rain that could cause sudden changes in platform
position. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard.

Lower Controls

Only the platform raise and lower functions may be oper­ated from the lower controls. The lower controls may be
used for initial set up of the aerial platform, and for testing
and inspection.

Use the following procedure to raise or lower the platform
using the lower controls.

1. At the upper and lower controls, twist the emer­gency stop button clockwise (refer to Figures 9.1 and

9.3).

Emergency

Emergency

Stop Button

Stop Button

Start

Start

Switch

Switch

Enable Button

Enable Button

Platform Raise/Lower Switch

Platform Raise/Lower Switch

The platform rated work load is the total weight of the per­sonnel and equipment that may be lifted in the platform.

The work loads are stated on the platform rating placard
at the entrance to the platform.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not exceed the capacity values indicated
on the platform rating placard.

Capacity values indicate the rated lifting capacity and do
not indicate aerial platform stability.

The operator bears ultimate responsibility for ensuring
that the aerial platform is properly set up for the particular
conditions encountered.

Preparing for Operation

Use the following procedure to prepare the aerial platform
for operation:

1. Perform a prestart inspection (refer to Chapter 8).

2. Make sure the battery disconnect is plugged in.

3. Close and latch the battery and hydraulic trays.

Figure 9.1 – Lower Controls

2. Turn the start switch to the on position.

3. Press and hold the enable button.

4. Hold the platform raise/lower toggle switch up to raise
the platform and down to lower it.

5. Release the toggle switch to stop movement.

Upper Controls

The upper controls may be used for driving and position­ing the aerial platform while on the job.

Before operating the upper controls, properly set up the
aerial platform as described under Preparing for Opera­tion.

AW arning

The potential for an accident increases from improp­erly driving or steering the aerial platform. Death
or serious injury could result from such accidents.
Make sure the upper control panel is at the front of
the platform, hooked on the guardrail, and hanging
inside the platform with the red upper control box
arrow facing the front of the platform.

S2633 – 8210048 33

Chapter 9 – Operation

Avoid driving the platform with the upper controls facing
the rear or side of the machine. In this position the ma­chine is diffi cult to control because the drive and steer
control movements and their resulting machine move-

ments will not correspond.

Only operate from the upper controls when it is at the
front of the platform, hooked on the guardrail, and hang­ing inside the platform with the red upper control box
arrow facing the front of the platform (refer to Figure

9.2). In this position the guardrail and upper control box

arrows will point the same direction, towards the front of
the machine.

Upper Controls

Upper Controls

Left

Left

Guardrail

Guardrail

5. The aerial platform may be driven and the platform
may be raised and lowered from the upper con­trols.

Platform

Use care when entering and exiting the platform to avoid
slipping and/or falling. Securely close the safety gate
when the platform is occupied.

ADanger

The potential for an accident increases when the fold
down rails are lowered. Death or serious injury can
result in such accidents. Do not elevate the platform
with the fold down rails lowered. Use extreme care
when moving the aerial platform while the fold down
rails are lowered.

Be sure the fold down guardrails are up and the hardware
is securely tightened, anytime the machine is not being
transported.

Raising and Lowering

The raise speed is proportional to the joystick position.
The farther the joystick is moved, the faster the platform
raises. There is only one lowering speed.

Figure 9.2 – Upper Control Operating Position

Use the following procedure to operate the aerial platform
from the upper controls:

1. From the lower controls, twist the emergency stop
button clockwise (refer to Figure 9.1).

2. Insert the key into the start switch and turn the switch
to the on position.

3. Enter the platform and secure the gate.

4. From the upper controls, twist the emergency stop
button clockwise (refer to Figure 9.3).

Emergency

Emergency

Stop Button

Stop Button

Platform

Platform

Raise/Lower Button

Raise/Lower Button

Low Speed Drive

Low Speed Drive

High Speed Drive

High Speed Drive

Horn

Horn

Interlock Switch

Interlock Switch

Steer

Steer

Switch

Switch

Joystick

Joystick

1. Press the platform raise/lower button (refer to Figure

9.3).

2. Squeeze and hold the interlock switch against the
joystick.

To raise the platform, slowly push the joystick

y

forward until the desired height is reached.

To lower the platform, pull the joystick back-

y

ward.

Extending

The platform can be extended and securely locked into
position.

Use the following procedure to extend the platform:

1. Enter the platform and close the gate.

ACaution

The extension deck is free to move when the foot
lever is depressed. Personal injury may result from
extending the platform deck while the aerial platform
is on a slope. Do not attempt to extend or retract
the platform unless the aerial platform is on a level
surface.

2. While facing the front of the platform, step down on
the foot lever and push the top rail of the extension
deck forward to extend the deck until the pin engages
the mid or front stop (refer to Figure 9.4).

Figure 9.3 – Upper Controls

34 S2633 – 8210048

Pin

Pin

Rear Stop

Rear Stop

Foot Lever

Foot Lever

Mid Stop

Mid Stop

Front Stop

Front Stop

Retaining Pin

Retaining Pin

Chapter 9 – Operation

Wallboard Loading Gate

Wallboard Loading Gate

Figure 9.4 – Platform Extension

3. Try to move the rails back and forth to make sure the
platform extension deck is locked in position.

Use the following procedure to retract the platform:

1. Enter the platform and close the gate.

ACaution

The extension deck is free to move when the foot
lever is depressed. Personal injury may result from
extending the platform deck while the aerial platform
is on a slope. Do not attempt to extend or retract
the platform unless the aerial platform is on a level
surface.

2. While facing the front of the platform, step down on
the foot lever and pull the top rail of the extension
deck backward until the pin engages the mid or rear
stop (refer to Figure 9.4).

3. Try to move the rails back and forth to make sure the
platform extension deck is locked in position.

Wallboard Loading Gate

The wallboard loading gate is located at the rear of the
platform and can be used for loading work materials in
the platform.

The gate must be securely fastened closed except when
personnel are loading or unloading work materials in the
platform.

Use to following procedure to load work materials in the
platform using the wallboard loading gate:

1. Remove the retaining pin (refer to Figure 9.5) from
the wallboard loading gate.

Figure 9.5 – Rear of Platform

2. Rotate the wallboard loading gate inward.

3. After loading the platform, rotate the gate inward and
replace the pin.

Driving and Steering

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not drive an elevated aerial platform on
soft, uneven, or sloping surfaces. Do not drive the
machine on grades that exceed 26 percent.

A fully stowed machine may be operated on grades up
to 26 percent. A grade of 26 percent is a 31″ (0.79 m)
vertical rise in 10′ (3.05 m) horizontal length.

AW arning

Death or serious injury could result from improperly
driving or steering the aerial platform. Read and un­derstand the information in this manual and on the
placards and decals on the machine before operating
the aerial platform on the job.

Use the following procedure to operate the drive and
steer functions.

1. Determine the desired drive range for the specifi c
driving conditions. Press the appropriate drive speed
button.

y

Select the high speed drive button when travel­ing across fi rm, fl at, level surfaces. High range
can only be activated when the platform is fully
lowered.

y

Select the low speed drive button when driving on
loading ramps or other steep grades and when
safety considerations demand slow deliberate
machine movement.

S2633 – 8210048 35

Chapter 9 – Operation

2. Push the drive joystick forward to move the chas­sis forward, the direction of the red arrow. Pull the
joystick backward to move the chassis backward,
the direction of the yellow arrow. The drive speed is
proportional to the joystick position.

3. To stop drive motion, return the joystick to neutral.

Note
To make an emergency stop push the emergency stop
inward button to apply the parking brakes.

4. The steer switch is a momentary contact, rocker
switch on top of the drive joystick. This switch controls
the two front wheels to steer the aerial platform.

y

To steer to the right, hold down the right side of
the steer switch.

y

To steer to the left, hold down the left side of the
steer switch.

Note
Holding the steer switch down too long may result in
a sharp turn. This is especially true when driving and
steering at the same time. It may be easier to turn the
wheels in small increments using a series of quick taps
on the steer switch.

Drive/Lift Level Sensor Interlock

When the platform is elevated above 6′ (1.8 m), lift and
drive functions are interlocked through a level sensor
system. If the chassis is tilted more than two degrees
side-to-side or front-to-rear, platform raise and drive
functions are disabled and an alarm sounds when those
controls are activated.

If the drive/lift level sensor interlock shuts off the platform
raise and drive functions, lower the platform and drive to
a level surface.

All Motion Alarm

The all motion alarm sounds loud intermittent beeps
anytime the machine functions are being operated.

Fold Down Guardrails

The platform guardrails may be folded down to pass the
machine under low height obstructions.

ADanger

The potential for an accident increases when the fold
down rails are lowered. Death or serious injury can
result in such accidents. Do not elevate the platform
with the fold down rails lowered. Use extreme care
when moving the aerial platform while the fold down
rails are lowered.

5. Set the steer wheels straight ahead after completing
a turn. The steering wheels are not self-centering.

Drive Speeds

The drive speed is proportional to the joystick position.
The farther the joystick is moved, the faster the travel
speed.

Always slow down and switch the drive system to low
range before traveling over rough terrain or any sloped
surface.

Drive speed ranges are interlocked through limit switches
that sense the platform position.

y

When the platform is elevated, only the slowest
drive speed will work regardless of the drive speed
selected.

y

To avoid a sudden speed change from high to low,
always bring the machine to a stop before raising the
platform from the stowed position.

AW arning

The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Do not alter,
disable, or override any safety device.

Use the following procedure to fold down the guardrails:

1. Fully retract the platform extension deck and lower
the platform.

2. From the lower controls, turn the start switch to the
off position.

3. Enter the platform and close the gate.

4. Remove the upper control panel from the side guard­rail and place it on the fl oor of the platform.

5.

Remove the retaining pin on the wallboard loading
gate (refer to Figure 9.5) and the front guardrail (refer
to Figure 9.6).

Do not use the aerial platform if it drives faster than

0.50 mph (0.8 km/h) when the platform is out of the
stowed position.

36 S2633 – 8210048

Chapter 9 – Operation

Front Guardrail

Front Guardrail

Retaining Pin

Retaining Pin

Figure 9.6 – Front Guardrail

6. Rotate the wallboard loading gate and the front
guardrail inward (refer to Figure 9.7).

Front Guardrail

Front Guardrail

ACaution

The rails are free to move downward after lifting up
on them. Improper lifting can cause personal injury .
Be prepared to hold the weight of the rails before
beginning to lower them.

7. Starting with the platform extension guardrails and
then the side guardrails, lift up on each guardrail and
fold it inward (refer to Figure 9.8).

Figure 9.8 – Fold Down Guardrails

Front of Platform

Wallboard Loading

Wallboard Loading

Gate

Gate

Rear of Platform

Figure 9.7 – Front Guardrail and Wallboard

Loading Gate Rotated Inward

Use the following procedure to reassemble the guard­rails before operating the aerial platform from the upper
controls:

1. Fully raise the side guardrails to the upright position
and push downward on them making sure they se­curely set into the platform (refer to Figure 9.8).

2. Fully raise the platform extension side guardrails to
the upright position and push downward on them
making sure they securely set into the platform.

3.

Rotate the wallboard loading gate and the front guard­rail outward and secure them to the side guardrails us­ing the retaining pin (refer to Figures 9.5 and 9.6).

AW arning

The potential for an accident increases from improp­erly driving or steering the aerial platform. Death
or serious injury could result from such accidents.
Make sure the upper control panel is at the front of
the platform, hooked on the guardrail, and hanging
inside the platform with the red upper control box
arrow facing the front of the platform.

4. Replace the upper control panel at the front of the
platform, hooked on the guardrail, and hanging inside
the platform (refer to Figure 9.9).

In this position the red upper control box arrow

y

will point towards the front of the machine.

S2633 – 8210048 37

Chapter 9 – Operation

Left

Left

Guardrail

Guardrail

Upper Controls

Upper Controls

The battery tray on the right side of the chassis con-

y

tains the battery disconnect, batteries and the battery
charger.

The hydraulic tray on the left side of the chassis con-

y

tains the lower controls, the hydraulic reservoir, and
the hydraulic fl uid fi lter.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury can result from a tip-over ac­cident. Do not open the trays when the platform is
raised more than eight feet.

Figure 9.9 – Upper Control Operating Position

Swing-Out Trays

Batteries and hydraulic components are enclosed in
swing-out trays (refer to Figure 9.10) on each side of
the chassis.

LatchLatch

Figure 9.10 – Battery Tray

To open the swing-out tray, pull the latch outward and
swing the tray open.

38 S2633 – 8210048

Chapter 10 – Stowing and Transporting

To prevent unauthorized use and damage, properly stow
the aerial platform at the end of each work day. It must
also be properly stowed while transporting.

Stowing

The properly stowed position is shown in Figure 10.1.

Figure 10.1 – Stowed Position

Use the following procedure to properly stow the aerial
platform.

1. Fully retract the platform extension deck and ensure
the pin is engaged in the back stop.

2. Fully lower the platform.

3. From the upper and lower controls, push the emer­gency stop buttons inward.

Use a winch to load and unload the aerial platform on
ramps that exceed the grade capability of the machine.
A winch may also be used when conditions of the ramp
could cause driving to be hazardous.

The equipment used to load, unload, and transport the
aerial platform must have adequate capacity. Refer to
Chapter 2 to determine the approximate weight of the
aerial platform.

The user assumes all responsibility for:

Choosing the proper method of transportation.

y

Choosing the proper selection and use of transporta-

y

tion and tie-down devices.

Making sure the equipment used is capable of sup-

y

porting the weight of the aerial platform.

Making sure all manufacturer’s instructions and warn-

y

ings, regulations and safety rules of their employer,
the DOT, and/or any other state or federal law are
followed.

Lifting With a Forklift

Use the following procedure to lift the aerial platform with
a forklift.

1. Properly stow the aerial platform.

2. Remove all personnel, tools, materials, or other loose
objects from the platform.

4. Open the battery tray and unplug the battery discon­nect connector.

5. Securely close and latch the battery and hydraulic
trays.

Transporting

The aerial platform may be moved on a transport vehicle.
Depending on the particular situation, the aerial platform
may be lifted with a forklift, driven, winched, or hoisted
onto a vehicle such as a truck or trailer. Driving is the
preferred method.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Do not drive on ramps that exceed 26 percent
grade, or where conditions of the ramp could cause
driving to be hazardous.

Drive the aerial platform onto the transport vehicle if the
ramp incline is within the 26 percent grade capability of
the aerial platform.

A 26 percent grade is a 31″ (0.79 m) vertical rise in 10′
(3.05 m) horizontal length.

ACaution

Lifting the aerial platform with the forklift forks posi­tioned improperly can produce enough force to dam­age machine components. When lifting the machine
from the rear, place the forklift forks in the forklift
pockets directly under the rear of the machine.

3. Place the forklift forks in the forklift pockets directly un­der the rear of the machine (refer to Figure 10.2).

Forklift PocketsForklift Pockets

Figure 10.2 – Rear of Chassis

S2633 – 8210048 39

Chapter 10 – Stowing and Transporting

Note
If necessary , the machine may be lifted with a forklift from
the either side under the pothole protector skids.

4. Do not raise the aerial platform higher than necessary
to transport it. Drive the forklift slowly and carefully
when transporting the aerial platform.

Driving

Use the following procedure to drive the aerial platform
onto the transport vehicle:

1. Locate the transport vehicle so it is in a straight line
with the loading ramp.

2. Chock the vehicle wheels so it cannot roll away from
the ramp while the machine is loaded.

3. Remove any unnecessary tools, materials, or other
loose objects from the platform.

4. Retract the platform extension deck and fully lower
the aerial platform into the stowed position.

5. Using the upper controls, drive the aerial platform
to the foot of the loading ramp with the front wheels
nearest the ramp. Make sure the aerial platform is
centered with the ramps and that the steering wheels
are straight.

AW arning

The aerial platform is free to move when the brakes
are released. Death or serious injury could result.
Re-enable the brakes before operating the aerial
platform.

5. Chock the wheels to prevent uncontrolled motion of
the aerial platform.

6. At the front drive motors, remove the thread protec­tors from the outer plugs (refer to Figure 10.3).

Thread ProtectorThread Protector

Figure 10.3 – Front Drive Motor

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac­cident. Set the drive range to low before driving up
or down a grade.

6. Press the low speed drive button.

7. Drive the aerial platform onto the transport vehicle
in a straight line through the grade transitions with
minimal turning.

8. Chock the machine wheels.

Winching

Use the following procedure to winch the aerial platform
onto the transport vehicle:

1. Position the transport vehicle so the aerial platform
will not roll forward after it is loaded.

2. Remove any unnecessary tools, materials, or other
loose objects from the platform.

3. Drive the machine to the foot of the loading ramp
with the front wheels nearest the ramp. Make sure
the machine is centered with the ramps and that the
steering wheels are straight.

4. Properly stow the aerial platform.

7. Using a 5 mm Allen wrench, remove the outer plugs
turning counterclockwise (refer to Figure 10.4).

Outer Plug

Outer Plug

Inner Plug

Inner Plug

Thread

Thread

Protector

Protector

Figure 10.4 – Front Drive Motor

Turn the plugs alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

8. Using a 5 mm Allen wrench, turn the inner plugs as far
as possible turning clockwise (refer to Figure 10.4).

Turn the plugs alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

9. Attach the winch to the tie-down lugs (refer to Figure

10.5) on the front of the chassis

40 S2633 – 8210048

Chapter 10 – Stowing and Transporting

The empty vehicle weight is stamped on the serial

y

number placard and is listed in Chapter 2.

Lifting Lugs

Lifting Lugs

Tie-Down Lugs

Tie-Down Lugs

Figure 10.5 – Front of Machine

10. Remove the wheel chocks and use the winch to
position the aerial platform on the transport vehicle.

AW arning

The aerial platform is free to move when the brakes
are released. Death or serious injury could result.
Re-enable the brakes before operating the aerial
platform.

11. After moving the aerial platform, using a 5 mm Allen
wrench turn the inner plugs as far as possible coun­terclockwise and the outer plugs as far as possible
clockwise and replace the thread protector (refer to
Figure 10.4).

The user assumes all responsibility for:

Making sure the equipment used is capable of sup-

y

porting the weight of the aerial platform.

Making sure all manufacturer’s instructions and warn-

y

ings, regulations and safety rules of their employer
and/or any state or federal law are followed.

Use the following procedure to hoist the aerial platform
onto the transport vehicle:

1. Properly stow the aerial platform.

2. Inspect the front lifting lugs and the rear lifting lugs
(refer to Figures 10.5 and 10.6) to make sure they
are free of cracks and are in good condition. There
are two lugs on the rear of the chassis and four on
the front. Have any damage repaired by a qualifi ed
service technician before attempting to hoist the
machine.

Turn the nuts alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

12. After unloading the aerial platform from the transport
vehicle, verify that the drive system and brakes oper­ate properly before operating the aerial platform.

Hoisting

Use a four point sling arrangement attached to the lifting
lugs when hoisting the aerial platform. Machine damage
can occur if the sling is attached anywhere else.

AW arning

The potential for an accident increases when the
aerial platform is lifted using improper equipment
and/or lifting techniques. Death or serious injury
could result from such accidents. Use proper equip­ment and lifting techniques when lifting the aerial
platform.

Know the weight of the aerial platform and the capacity
of the lifting devices before hoisting.

Lifting devices include the hoist or crane, chains,

y

straps, cables, hooks, sheaves, shackles, slings, and
other hardware used to support the machine.

Tie-Down/Lifting LugsTie-Down/Lifting Lugs

Figure 10.6 – Rear of Machine

3. Remove all personnel, tools, materials, or other loose
objects from the platform.

4. Connect the chains or straps to the lifting lugs using
bolted shackles. Hooks that fi t properly in the lugs
and that have latching mechanisms to prevent them
from falling out under a slack line condition may also
be used.

Do not run the sling cable through the lifting lugs.

Cable damage and/or failure can result from the

y

cable contacting the sharp corners of the lug.

There is no effective way of putting a corner

y

protector in the hole of the lug.

S2633 – 8210048 41

Chapter 10 – Stowing and Transporting

5. Use spreader bars of suffi cient length to keep the
chains, straps, or cables from contacting the scissors
structure or platform.

y

When using cables, use rigid corner protectors
at any point where the cable contacts on sharp
corners to prevent damaging the cable.

y

Careful rigging of the spreaders is required to
prevent machine damage.

6. Adjust the length of each chain or strap so the aerial
platform remains level when raised off the ground.

7. Use the hoist or crane to carefully raise and position
the aerial platform onto the transport vehicle.

Securing for Transport

Use the following procedure to secure the aerial platform
on the transport vehicle:

1. Chock the wheels.

2. Remove all personnel, tools, materials, or other loose
objects from the platform.

3. Properly stow the aerial platform.

4. Place the upper and lower emergency stop buttons
in the off position.

5. At the lower controls, turn the start switch to the off
position and remove the key.

6. Unplug the battery disconnect connector.

ACaution

Ratchets, winches, and come-alongs may produce
enough force to damage machine components. Do
not over tighten the straps or chains when securing
the aerial platform to the transport vehicle.

7. Use chains or straps to securely fasten the aerial
platform to the transport vehicle using the front and
rear tie-down lugs as attachment points. Proper tie­down and hauling is the responsibility of the carrier.

42 S2633 – 8210048

Chapter 11 – Emergency Operation

If the main hydraulic system fails:

y

The aerial platform may be lowered using the emer­gency lowering knob.

y

The machine may be towed if the drive system fails.

y

Refer to Emergency Lowering, or Towing for the ap­propriate procedure.

Emergency Lowering Knob

Use the following procedure to lower the platform:

1. Retract the platform extension, if possible.

2. Locate the emergency lowering knob at the rear of
the chassis (refer to Figure 11.1).

Towing

The aerial platform may be pushed or pulled after disen­gaging the brakes.

AW arning

The aerial platform is free to move when the brakes
are disengaged. Death or serious injury could result.
Re-enable the brakes before operating the aerial
platform.

Use the following procedure to manually disengage the
brakes:

1. Chock the wheels to prevent uncontrolled motion of
the aerial platform.

2. At the front drive motors, remove the thread protec­tors from the outer plugs (refer to Figure 11.2).

Thread ProtectorThread Protector

Emergency

Emergency

Lowering Knob

Lowering Knob

Figure 11.1 – Rear of Machine

3. Make sure there is nothing in the way to obstruct the
platform when it lowers.

ADanger

Pinch points exist on the moving components. Death
or serious injury will result from becoming trapped
between components. Make sure all personnel stand
clear while lowering the platform with the emergency
lowering knob.

4. Pull the knob outward to lower the platform. Release
the knob to stop.

AW arning

The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Fully close
the emergency lowering valve before operating the
aerial platform.

5. Make certain the knob is fully released and the emer­gency lowering valve is fully closed before operating
the aerial platform.

Figure 11.2 – Front Drive Motor

3. Using a 5 mm Allen wrench, remove the outer plugs
turning counterclockwise (refer to Figure 11.3).

Outer Plug

Outer Plug

Inner Plug

Inner Plug

Thread

Thread

Protector

Protector

Figure 11.3 – Front Drive Motor

Turn the plugs alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

S2633 – 8210048 43

Chapter 11 – Emergency Operation

4. Using a 5 mm Allen wrench, turn the inner plugs as far
as possible turning clockwise (refer to Figure 11.3).

Turn the plugs alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

5. Do not exceed .67 mph (1.08 km/h) when towing.

AW arning

The aerial platform is free to move when the brakes
are released. Death or serious injury could result.
Re-enable the brakes before operating the aerial
platform.

6. After moving the aerial platform, using a 5 mm Allen
wrench turn the inner plugs as far as possible coun­terclockwise and the outer plugs as far as possible
clockwise and replace the thread protector (refer to
Figure 11.3).

Turn the plugs alternately in ½ turn increments to

y

insure uniform adjustment and prevent binding.

7. After unloading the aerial platform from the transport
vehicle, verify that the drive system and brakes oper­ate properly before operating the aerial platform.

44 S2633 – 8210048

Chapter 12 – Troubleshooting

The troubleshooting chart may be used to locate and
eliminate situations where machine operation may be
interrupted. If the problem cannot be corrected with the

action listed, stow the machine and remove it from ser­vice. Repairs must be made by qualifi ed maintenance
personnel.

Troubleshooting Chart

Symptom Possible Cause Corrective Action

All functions stop working. Motor or pump failure. Manually stow the machine using the

emergency lowering knob.

Low fl uid level in reservoir. Check hydraulic fl uid level. Add correct

type of fl uid if necessary.

Batteries discharged. Recharge batteries.

Electrical system malfunction. Stow the machine and do not operate until

repairs are made.

Platform will not raise or lower
from lower controls.

Platform will not raise or lower
from upper controls.

Platform will not raise and alarm
is sounding.

Lower or upper controls do not
work.

Platform will not raise, or raises
slower than normal.

Platform drifts down. Emergency lowering knob not prop-

Platform will not lower. Safety prop in place. Rotate the safety prop counterclockwise

Enable button not depressed. Press and hold the enable button while op-

erating the platform raise/lower switch.

Battery disconnect is unplugged. Plug in the battery disconnect connector.

Emergency stop button is pushed
inward to the off position.

Emergency lowering knob is not prop­erly disengaged.

Switches set wrong. From the upper controls:

Battery disconnect is unplugged. Plug in the battery disconnect connector.

Emergency lowering valve is open. Twist the button clockwise to restore

Emergency lowering knob not prop­erly disengaged.

Machine is not on a level surface. Lower the platform and drive to a level

Emergency stop button is pushed
inward to the off position.

Battery disconnect is unplugged. Plug in the battery disconnect connector.

Battery charger plugged in. Unplug the battery charger.

Emergency lowering knob not prop­erly disengaged.

Platform capacity has been ex­ceeded.

Low battery charge. Check the battery charge indicator and

erly disengaged.

Hydraulic system malfunction. Stow the machine and do not operate until

Twist the button clockwise to restore
power.

Make sure the knob returns to the normal
operating position.

Press the platform raise/lower button

y

then squeeze and hold the interlock
switch. Push the joystick forward to
raise the platform or pull it backward
to lower.

power.

Ensure knob is fully released and the emer­gency lowering valve is fully closed.

surface.

At the upper and lower controls twist the
button clockwise to restore power.

Make sure the knob returns to the normal
operating position.

Remove load from platform. Refer to
platform capacity placard for maximum
capacity.

recharge the batteries if necessary.

Make sure the knob returns to the normal
operating position.

repairs are made.

to the stowed position.

S2633 – 8210048 45

Chapter 12 – Troubleshooting

Symptom Possible Cause Corrective Action

Platform will not extend. Foot lever not fully depressed. Fully step on foot lever to release the pin

from the rear stop before extending the
platform.

Drive functions don’t work. Switches set wrong. From the upper controls:

y

Press the high or low speed drive
button then squeeze and hold the
interlock switch. Push the joystick for­ward to drive the platform forward or
pull it backward to drive the platform
in reverse.

Machine is not on a level surface or
too steep a grade.

Lower the platform and drive to a level
surface.

Load capacity exceeded. Remove load from platform. Refer to

platform capacity placard for maximum
capacity.

Low hydraulic system pressure. Stow the machine and do not operate until

repairs are made.

Only slow drive speed works. Platform elevated above 3′ (0.9 m). Lower platform to drive machine at faster

speed.

Low speed drive button depressed. Press the high speed drive button.

Machine will not steer. Joystick interlock switch not en-

gaged.

Wheels won’t turn when winch-

Brakes are engaged. To release the brakes from the front drive

ing or pushing.

Engage the interlock switch before operat­ing the steer switch.

motors (refer to Figure 11.3):

Remove the thread protectors from

y

the outer plugs.

Use a 5 mm Allen wrench to remove

y

the outer plugs turning counterclock­wise.

Use a 5 mm Allen wrench to turn the

y

inner plugs as far as possible turning
clockwise.

Brakes don’t work. Brake are not fully engaged. To engage the brakes from the front drive

motors (refer to Figure 11.3):

Use a 5 mm Allen wrench to turn the

y

inner plugs as far as possible coun­terclockwise.

Use a 5 mm Allen wrench to turn the

y

outer plugs as far as possible clock­wise.

Replace the thread protectors on the

y

outer plugs.

Tilt alarm does not work. Platform is not raised more than 3′

(0.9 m).

Normal operation. The tilt alarm is not
active until the platform is raised more
than 3′ (0.9 m).

46 S2633 – 8210048

Chapter 12 – Troubleshooting

Symptom Possible Cause Corrective Action

Battery charge indicator does
not indicate a reading when

No source of power. Make sure power source is plugged in

and turned on.

charging batteries.

Charger power fuse is blown. Stow the machine and do not operate until

repairs are made.

Hydraulic fl uid temperature of
160°F (71°C) or more.

Prolonged driving or platform opera­tion.

High pressure fl uid return to reservoir
caused by kinked or twisted hose.

Stop operation until fl uid cools.

Remove the kink or twist from the hose.
Let fl uid cool before resuming operation.

Hydraulic system component failure. Stow the machine and do not operate until

repairs are made.

Severe hydraulic leak.

Failure of hose, tube, fi tting, seal, etc.

Stow the machine and do not operate until
repairs are made.

When a fault code is displayed on the upper control panel,
the chart below may be used to locate and eliminate situ­ations where machine operation may be interrupted.

If the problem cannot be corrected with the action listed,
stow the machine and remove it from service. Repairs
must be made by qualifi ed maintenance personnel.

Fault Code Possible Cause Corrective Action

01 - 39 Upper or lower control function de-

From the upper controls make sure:

pressed during machine start up.

No selector buttons are de-

y

pressed.

The interlock switch is not de-

y

pressed.

The joystick is in neutral.

y

The steer switch is not de-

y

pressed.

From the lower controls make sure:

The enable button is not de-

y

pressed.

The platform raise/lower switch

y

is in the off position.

From the lower or upper controls:

Cycle machine power off then on

y

by pressing the emergency stop
button and then twisting the but­ton clockwise to restore power.

Faulty lower or upper control panel
or machine error.

Stow the machine and do not oper­ate until repairs are made.

54 - 67 Machine error. Stow the machine and do not oper-

ate until repairs are made.

68 Low battery voltage. Charge or replace the batteries.

S2633 – 8210048 47

Chapter 12 – Troubleshooting

48 S2633 – 8210048

Appendix A – Glossary

aerial platform – a mobile device that has an adjustable position platform,

supported from ground level by a structure.

ambient temperature – the air temperature of the immediate environment.

authorized personnel – personnel approved as assigned to perform specifi c

duties at a specifi c location.

base – the relevant contact points of the aerial platform that form the stability
support (e.g. wheels, casters, stabilizers).

battery tray – a swing-out compartment that holds the batteries, battery
charger, and the battery disconnect plug.

center of gravity – the point in the aerial platform around which its weight
is evenly balanced.

chassis – the integral part of the aerial platform that provides mobility and
support for the scissors structure.

fall restraint – a system that is used while working on a boom lift within
the boundaries of platform guardrails to provide restraint from being pro­jected upward from the platform. This system includes a harness or belt,
lanyard, and a lanyard anchor. Although federal regulations, OSHA, ANSI,
and Snorkel do not require the use of additional fall protection beyond the
platform guardrails on scissor lift aerial platforms, local, state, or employer
rules may require their use.

fl oor or ground pressure – the maximum pressure, expressed in pounds
per square inch, a single wheel concentrates on the fl oor or ground.

free-wheeling valve – a needle valve that, when adjusted open, allows
hydraulic fl uid to fl ow through the wheel drive motors. This allows the aerial
platform to be pushed or towed without damaged to the drive motors.

gradeability – the maximum slope that the aerial platform is capable of travel.

guardrail system – a vertical barrier around the platform to prevent per-

sonnel from falling.

hazardous location – any location that contains, or has the potential to con­tain, an explosive or fl ammable atmosphere as defi ned by ANSI/NFPA 505.

hydraulic tray – a swing-out compartment that holds the electrical panel
for the lower controls, the hydraulic fl uid reservoir, and the hydraulic fl uid
fi lter.

level sensor – a device that detects a preset degree of variation from perfect
level. The level sensor is used to sound an alarm if operating on a slope
greater than the preset value.

lower controls – the controls located at ground level for operating some or
all of the functions of the aerial platform.

manufacturer – a person or entity who makes, builds or produces an

aerial platform.

maximum travel height – the maximum platform height or the most adverse
confi guration(s) with respect to stability in which travel is permitted by the
manufacturer.

operation – the performance of any aerial platform functions within the scope
of its specifi cations and in accordance with the manufacturer’s instructions,
the users work rules, and all applicable governmental regulations.

operator – a qualifi ed person who controls the movement of an aerial platform.

personal fall arrest system – a fall protection system that is used while

working on an unprotected edge (such as a roof top with no guardrail). This
system includes a harness, lanyard or other connecting device, a fall arrestor,
an energy absorber or decelerator, an anchorage connector, and a secure
anchorage such as a building beam, girders or columns. An aerial platform
is not a fall arrest anchorage.

– the portion of an aerial platform intended to be occupied by

platform

personnel with their tools and materials.

platform height – the vertical distance measured from the fl oor of the plat-
form to the surface upon which the chassis is being supported.

pothole protection interlock – a safety feature that sounds an alarm and
automatically stops the platform raise function if the pothole protection skids
are prevented from lowering properly.

pothole protection system – a mechanical tip-over prevention system
consisting of skids along the bottom of both sides of the chassis which lower
as the platform is raised.

prestart inspection – a required safety inspection routine that is performed
daily before operating the aerial platform.

qualifi ed person – a person, who by reason of knowledge, experience, or training
is familiar with the operation to be performed and the hazards involved.

rated work load – the designed carrying capacity of the aerial platform as
specifi ed by the manufacturer.

safety prop – a bar that when properly positioned mechanically prevents
the platform from lowering.

stow – to place a component, such as the platform, in its rest position.

turning radius – the radius of the circle created by the wheel during a 360°

turn with the steering wheels turned to maximum. Inside turning radius is the
wheel closest to the center and outside turning radius is the wheel farthest
from the center.

unrestricted rated work load – the maximum designed carrying capacity
of the aerial platform allowed by the manufacturer in all operating confi gu-
rations.

upper controls – the controls located on or beside the platform used for
operating some or all of the functions of the aerial platform.

wheelbase – the distance from the center of the rear wheel to the center
of the front wheel.

working envelope – the area defi ned by the horizontal and vertical limits

of travel that the platform may be positioned in.

working height – platform height plus six feet (1.8 meters).

maximum wheel load – the load or weight that can be transmitted through

a single wheel to the fl oor or ground.

Minimum Safe Approach Distance (M.S.A.D.) – the minimum safe dis­tance that electrical conductors may be approached when using the aerial
platform.

S2633 – 8210048

LIMITED WARRANTY

Snorkel warrants each new machine manufactured and sold by it to be free from defects in material and workmanship for a period of
one (1) year from date of delivery to a Customer or for one year after the machine has been placed in fi rst service in a Dealer rental
fl eet, whichever comes fi rst. Any part or parts which, upon examination by the Snorkel Service Department, are found to be defective,
will be replaced or repaired, at the sole discretion of Snorkel, through its local Authorized Dealer at no charge.

Snorkel further warrants the structural components; specifi cally, the mainframe chassis, turntable, booms and scissor arms, of each
new machine manufactured by it to be free from defects in material and workmanship for an additional period of four (4) years. Any
such part or parts which, upon examination by the Snorkel Service Department, are found to be defective will be replaced or repaired
by Snorkel through its local Authorized Dealer at no charge; however, any labor charges incurred as a result of such replacement or
repair will be the responsibility of the Customer or Dealer.

The Snorkel Service Department must be notifi ed within forty-eight (48) hours of any possible warranty situation during the applicable
warranty period. Personnel performing warranty repair or replacement must obtain specifi c approval by Snorkel Service Department
prior to performing any warranty repair or replacement.

Customer and Dealer shall not be entitled to the benefi ts of this warranty and Snorkel shall have no obligations hereunder unless the
“Pre-Delivery and Inspection Report” has been properly completed and returned to the Snorkel Service Department within ten (10)
days after delivery of the Snorkel product to Customer or Dealer’s rental fl eet. Snorkel must be notifi ed, in writing, within ten (10)
days, of any machine sold to a Customer from a Dealer’s rental fl eet during the warranty period.

At the direction of the Snorkel Service Department, any component part(s) of Snorkel products to be replaced or repaired under
this warranty program must be returned freight prepaid to the Snorkel Service Department for inspection. All warranty replacement
parts will be shipped freight prepaid (standard ground) from the Snorkel Service Department or from Snorkel’s Vendor to Dealer or

Customer.

REPLACEMENT PARTS WARRANTY

Any replacement or service part made or sold by Snorkel is not subject to the preceding Limited Warranty beyond the normal warranty
period of the machine upon which the part was installed.

THIS WARRANTY EXCLUDES AND SNORKEL DOES NOT W ARRANT:

1. Engines, motors, tires and batteries which are manufactured by suppliers to Snorkel, who furnish their own warranty. Snorkel
will, however, to the extent permitted, pass through any such warranty protection to the Customer or Dealer.

2. Any Snorkel product which has been modifi ed or altered outside Snorkel’s factory without Snorkel’s written approval, if such
modifi cation or alteration, in the sole judgment of Snorkel’s Engineering and/or Service Departments, adversely affects the
stability, reliability or service life of the Snorkel product or any component thereof.

3. Any Snorkel product which has been subject to misuse, improper maintenance or accident. “Misuse” includes but is not limited
to operation beyond the factory-rated load capacity and speeds. “Improper maintenance” includes but is not limited to failure to
follow the recommendations contained in the Snorkel Operation, Maintenance, Repair Parts Manuals. Snorkel is not responsible
for normal maintenance, service adjustments and replacements, including but not limited to hydraulic fl uid, fi lters and lubrica-
tion.

4. Normal wear of any Snorkel component part(s). Normal wear of component parts may vary with the type application or type of
environment in which the machine may be used; such as, but not limited to sandblasting applications.

5. Any Snorkel product that has come in direct contact with any chemical or abrasive material.

6. Incidental or consequential expenses, losses, or damages related to any part or equipment failure, including but not limited to
freight cost to transport the machine to a repair facility, downtime of the machine, lost time for workers, lost orders, lost rental
revenue, lost profi ts or increased cost.

This warranty is expressly in lieu of all other warranties, representations or liabilities of Snorkel, either expressed or implied, unless oth­erwise amended in writing by Snorkel’s President, Vice President-Engineering, Vice President-Sales or Vice President-Marketing.

SNORKEL MAKES NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION OF THIS LIMITED W ARRANTY . SNORKEL
MAKES NO IMPLIED WARRANTY OF MERCHANT ABILITY OR FITNESS FOR A P ARTICULAR PURPOSE AND DISCLAIMS ALL
LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO INJURY TO PERSONS
OR PROPERTY.

The Customer shall make all warranty claims through its local Authorized Dealer and should contact the Dealer from whom the
Snorkel product was purchased for warranty service. Or, if unable to contact the Dealer, contact the Snorkel Service Department for

further assistance.

Effective July 1995

© Snorkel International, Inc. – all rights reserved Printed in the U.S.A.