Snorkel SR3084SL User Manual

Operator’s

Manual

Part Number 8210037
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, elevating assembly, 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.

California

Proposition 65 Warning

Diesel and gasoline engine exhaust and some of its
constituents are known by the State of California to cause
cancer, birth defects or other reproductive harm.

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

Chapter 2 – Specifi cations

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

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

Engine Specifi cations .................................................5

Engine Oil Viscosity ....................................................5

Chapter 3 – Safety

Electrocution Hazards ................................................7

Minimum Safe Approach Distance .............................7

Prestart Inspection......................................................8

Work Place Inspection and Practices ......................... 8

Operation .................................................................... 8

Tip-Over and Falling Hazards .....................................9

Electrical System ........................................................ 9

Hydraulic System........................................................9

Engine and Fuel Handling Precautions ....................10

Placards and Decals.................................................10

Chapter 4 – Safety Devices

Emergency Stop Controls......................................... 11

Upper Controls Emergency Stop Override ............... 11

Emergency Lowering Knob ......................................11

Guardrails ................................................................. 12

Lanyard Anchors.......................................................12

Tilt Alarm ...................................................................12

Speed Level..............................................................12

Engine Protection Systems ......................................13

High Engine Temperature Alarm ...........................13

Low Oil Pressure Alarm .........................................13

Horn Button ..............................................................13

Lowering Alarm ......................................................... 13

All Motion Alarm........................................................13

Flashing Light ...........................................................13

Chapter 5 – Gauges and Displays

Display Screen .........................................................15

Hour Meter ............................................................15

Fuel Gauge ...............................................................15

Engine Oil ................................................................. 15

Hydraulic Fluid Level Gauge ....................................16

Engine Air Filter Gauge ............................................16

Chapter 6 – Controls

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

On/Off Switch ........................................................17

Preheat Button ......................................................17

Start Button ...........................................................17

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

Upper Controls Emergency Stop Override ............17

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

Platform Raise Button ...........................................17

Platform Lower Button ...........................................17

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

Preheat Button ......................................................18

Start Button ...........................................................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

Speed Level Button ............................................... 19

Horn Button ...........................................................20

Chapter 7 – Prestart Inspection

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

Engine ......................................................................21

Oil Level ................................................................21

Coolant .................................................................. 21

Radiator ................................................................. 22

Fuel Tank ...............................................................22

Fuel Line ...............................................................22

Air Filter ................................................................. 22

Electrical System ...................................................... 22

Battery Terminals ...................................................23

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

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

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

Fluid Filter .............................................................24

Hoses, Tubes, and Fittings ....................................24

Tires and Wheels ......................................................24

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

Operating Controls ................................................25

Emergency Stop ....................................................25

Emergency Lowering ................................................25

Upper Controls Emergency Stop Override ............... 26

Lowering Alarm ......................................................... 26

All Motion Alarm........................................................26

Flashing Light ...........................................................26

Structures .................................................................26

Weldments ............................................................26

Fasteners ..............................................................26

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

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

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

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

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

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

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

Prestart Inspection Checklist .................................... 32

SR3084SL – 8210037

Table of Contents

Chapter 8 – Operation

Cold Weather Start Up .............................................33

Manually Warming The Hydraulic System ............33

Preheat Button ......................................................33

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

Lower Controls .........................................................34

Upper Controls .........................................................34

Platform ....................................................................35

Raising and Lowering ............................................35

Leveling ................................................................. 35

Driving and Steering ................................................. 36

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

Lowering Alarm ......................................................... 36

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

Gradeability ..............................................................36

Theoretical Gradeability ........................................36

Actual Gradeability ................................................37

Percent vs. Degree of Slope .................................37

Driving on a Slope ................................................. 37

Calculating Percent Grade ....................................38

Machine Gradeability ............................................38

Fold Down Guardrails ...............................................38

Chapter 9 – Stowing and Transporting

Stowing ..................................................................... 41

Transporting .............................................................41

Lifting With a Forklift ..............................................41

Driving ...................................................................42

Winching ...............................................................42

Hoisting .................................................................43

Securing for Transport ...........................................44

Chapter 10 – Emergency Operation

Emergency Lowering Knob ......................................45

Upper Controls Emergency Stop Override ............... 45

Towing ......................................................................45

Chapter 11 – Troubleshooting

Troubleshooting Chart .............................................. 47

Appendix A – Glossary

Limited Warranty

SR3084SL – 8210037

Chapter 1 – Introduction

Aerial Platform Features

The aerial platform is a self-propelled work platform that
has been designed to raise personnel, their tools, and
material to the workstation. The platform is raised and
lowered with hydraulic cylinders. A hydraulic motor on
each wheel provides power to move the aerial platform.

The standard machine includes the following features:

y

Lowering alarm

y

Hour meter

y

Speed level – automatic powered platform leveling

y

Oscillating front axle

y

Air fi lled tires

y

Dual multi-disk brakes

y

One-hand, proportional controls

y

Wired for AC outlet on platform

y

Fold-down guardrails

y

Four wheel drive

y

Drivable at full height

y

Tie-down/lifting lugs

y

Removable upper controls

y

Emergency lowering system

y

Keyed master switch

y

Cold weather start

y

Lanyard anchors

y

High engine temperature shut down

y

Low oil pressure shut down

y

Horn

y

Five year limited warranty

The machine is powered with a Perkins 403C-11 diesel
engine.

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:

All motion alarm

y

Flashing light

y

Canadian Standards Association (CSA) certifi cation

y

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.

Become profi cient in knowledge and actual operation

y

before using the aerial platform on the job.

The operator must be trained and authorized to per-

y

form any functions of the aerial platform.

SR3084SL – 8210037 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 SR3084SL – 8210037

Component Identifi cation

Right

Guardrail

Platform

Chapter 2 – Specifi cations

Rear Guardrail

Left

Guardrail

Front

Guardrail

Toeboards

Rear

Engine • Hydraulic Pump • Battery

Operator’s

Elevating

Assembly

Chassis

Engine Compartment

Fuel Tank

Manual

Controls

Tie-Down/Lifting

Lugs

Front

Right Side

Upper

Entry

Gate

Entry

Steps

Front

Tie-Down/Lifting

Lugs

Hydraulic Compartment

Hydraulic Reservoir • Hydraulic Fluid Filter

Emergency

Lowering Valve

Rear

Lower

Controls

Left Side

SR3084SL – 8210037 3

Chapter 2 – Specifi cations

General Specifi cations

Aerial Platform

Working height 36′ (10.97 m)
Maximum platform height 30′ (9.14 m)
Turning radius
Inside 13′ (3.96 m)
Wheelbase 100″ (2.54 m)
Ground clearance
Axle 8″ (20.32 cm)
Chassis 12.6″ (32 cm)
Maximum wheel load 2,502 lbs (1,135 kg)
Maximum ground pressure 32 psi (220 kPa)
Empty vehicle weight (EVW)
Approximate 7,090 lbs (3,216 kg)
Stowed width 84″ (2.13 m)
Stowed length 14′ 5″ (4.39 m)
Stowed height 8′ 6.5″ (2.6 m)

Platform

Dimensions 67.5″ x 166.5″ (1.71 m x 4.22 m)
Guardrail height 43.5″ (1.11m)
Toeboard height 6″ (152 mm)

Rated work load
Total 1,300 lbs (590 kg)
Maximum number of occupants 5 people

Function Speed

Platform raise 24 seconds
Platform lower 36 seconds
Drive speed
Elevated 0.45 mph (0.8 km/h)
Stowed 3.1 mph (5.0 km/h)

Drive System

Standard Four wheel drive
Gradeability – theoretical 38%
Maximum drive height 30′ (9.14 m)

Platform Leveling

Side-to-side 13 degrees
Front-to-rear 9 degrees

Tires

Air fi lled 26 x 12.00 - 16.5 NHs

Electrical System

Voltage 12 V DC
Source 550 CCA, 12 V battery
Fluid recommended Distilled water

Hydraulic System

Maximum pressure 3,000 psi (20,700 kPa)
Reservoir capacity 19.5 US gal (74.0 l)
System capacity 15 US gal (56.7 l)
Maximum operating temperature 200°F (93°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)

Engine

Diesel Perkins 403C-11

Fuel Tank Capacity

Diesel 12.4 US gal (47 l)

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)

4 SR3084SL – 8210037

Engine Specifi cations

Chapter 2 – Specifi cations

Engine Displacement Fuel Grade Coolant

Diesel

Perkins

403C-11

Note 1: Refer to the Perkins Operator’s Manual for specifi c fuel recommendations and specifi cations.
Note 2: Refer to the Perkins Operator’s Manual for specifi c coolant recommendations and specifi cations.
Note 3: Refer to the Perkins Operator’s Manual for specifi c lubricating oil recommendations and specifi cations.

69 cu. in.

(1.13 l)

ASTM No. 2D fuel with a minimum Cetane
number of 45.

below 32°F (0°C) use winterized No. 2D.

1

For operating temperatures

50% Water

50% Ethylene

Glycol

2

Engine Oil Viscosity

Engine

Perkins

403C-11

Ambient

Temperature

Above 77°F

(25°C)

32°F to 77°F

(0°C to 25°C)

Below 32°F

(0°C)

Engine Oil

Weight

SAE 30W or 10W30

SAE 20W or 10W30

SAE 10W

Oil

Capacity

4.6 US qt.
(4.4 l)

Oil

Grade

API

CH4

3

SR3084SL – 8210037 5

Chapter 2 – Specifi cations

6 SR3084SL – 8210037

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.

V oltage 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

SR3084SL – 8210037 7

Chapter 3 – Safety

Prestart Inspection

Perform a prestart inspection before each shift as de­scribed in Chapter 7. 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.

The welding ground clamp must be attached to the

y

same structure that is being welded.

Electrical current fl ow can be very intense, causing

y

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:

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

y

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:

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

y

may not be obvious to them
Watch for soft terrain, sloping surfaces, drop-offs, etc.

y

where stability could be jeopardized
Watch for bystanders and never allow anyone to be

y

under, or to reach through the elevating assembly
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.

Operate the controls slowly and deliberately to avoid

y

jerky and erratic operation.

Always stop the controls in neutral before going in the

y

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

8 SR3084SL – 8210037

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 sur-
face 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 ground pressure. 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.

On scissor lifts, personal fall protection is not required by
ANSI, Federal OSHA, nor Snorkel. However, fall restraint
might be required by work regulations. If so, the user is
responsible for fi tness and method of use.

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.

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 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.

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, hoses, etc.,
from becoming caught in or on the aerial platform.

If the platform or elevating assembly becomes caught

y

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

If control reversal does not free the platform, evacuate

y

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.

Batteries contain sulfuric acid that can damage your

y

eyes or skin on contact.

Wear a face shield, rubber gloves, and protective

y

clothing when working around batteries.

If acid contacts your eyes, fl ush immediately with clear

y

water and get medical attention.

If acid contacts your skin, wash off immediately with

y

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.

SR3084SL – 8210037 9

Chapter 3 – Safety

Engine and Fuel Handling Precautions

Refer to the engine manufacturer’s Operator’s Manual for
complete information on safe engine operation, mainte­nance, and specifi cations.

ADanger

Engine exhaust contains carbon monoxide, a poi­sonous gas that is invisible and odorless. Breathing
engine exhaust fumes will cause death or serious
illness. Do not run the engine in an enclosed area or
indoors without adequate ventilation.

Be careful not to run the diesel fuel tank empty. Bleed the
fuel system if air enters the lines between the tank and
the injection pump.

Allow the engine to return to idle before shutting the
engine off.

Do not smoke or permit open fl ames while fueling or near
fueling operations.

Never remove the fuel cap or fi ll the fuel tank while the
engine is running or hot. Never allow fuel to spill on hot
machine components.

Maintain control of the fuel fi ller nozzle when fi lling the
tank. Spilled fuel is a potential fi re hazard.

Do not overfi ll the fuel tank. Allow room for expansion.

Clean up spilled fuel immediately.

Tighten the fuel tank cap securely. If the fuel cap is lost,
replace it with an approved cap from Snorkel. Use of a
non-approved cap without proper venting may result in
pressurization of the tank.

Never use fuel for cleaning purposes.

For diesel engines, use the correct fuel grade for the
operating season.

ACaution

Engine coolant escaping under pressure may cause
serious burns. Shut the engine off and let it cool
before removing the radiator cap.

Let the engine and radiator cool before adding coolant.

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.

10 SR3084SL – 8210037

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

Stop

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

Stop

Upper Controls

Upper Controls

Emergency Stop

Emergency Stop

Override

Override

Push the emergency stop button inward to disconnect

y

power to all the control circuits.

Twist the button clockwise to restore power.

y

Upper Controls Emergency Stop Override

The upper controls emergency stop override (refer to
Figure 4.1) allows the platform to be lowered from the
lower controls in the event the upper controls emergency
stop button is depressed.

Hold the upper controls emergency stop override

y

switch upward to enable the lower controls.

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 on the left side
of the aerial platform (refer to Figure 4.3).

Figure 4.1 – Lower Controls

Push the emergency stop button inward to disconnect

y

power to the lower control circuits.

Twist the button clockwise to restore power.

y

Emergency

Emergency

Lowering Knob

Lowering Knob

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

Figure 4.3 – Emergency Lowering Knob

Pull the emergency lowering knob outward to open the

y

cylinder bleed down valve for emergency lowering.

SR3084SL – 8210037 11

Chapter 4 – Safety Devices

Guardrails

The guardrails (refer to Figure 4.4) help protect personnel
from falling off the platform.

The guardrail system includes:

Attach only one fall restraint device to each lanyard

y

anchor.

Do not use the lanyard anchors for personal fall arrest

y

anchorage.

y

A top rail

y

A mid rail

y

An entry gate

y

Toeboards around the sides of the platform.

Top Rail

Top Rail

Mid Rail

Mid Rail

Entry

Entry

Gate

Gate

Toeboard

Toeboard

Figure 4.4 – Platform

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

Lanyard Anchors

Six lanyard anchors for fall restraint anchorage are pro­vided on the fl oor of the platform (refer to Figure 4.5):

Tilt Alarm

If the aerial platform chassis is out of level more than four
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
or active the speed level 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.

Speed Level

The speed level button may be used to level the platform
when the aerial platform chassis is out of level more than
four degrees side-to-side or front-to-rear. The speed
level cannot be set if the aerial platform chassis is out
of level more than 13 degrees side-to-side or 9 degrees
front-to-rear.

The speed level button is located on upper control panel
(refer to Figure 4.6).

Speed

Speed

Level

Level

Lanyard

Lanyard

Anchor

Anchor

Horn

Horn

Figure 4.5 – Platform

Figure 4.6 – Upper Controls

Note

While the speed level is set only the platform raise

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

If local work rules require the use of a fall restraint

y

device, properly connect it to a lanyard anchor before

y

and lower functions will work.

To drive the machine, the speed level must be deac-

y

tivated by fully lowering the platform.

raising the platform.

12 SR3084SL – 8210037

Chapter 4 – Safety Devices

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.

The aerial platform must be on a fi rm, fl at surface capable
of withstanding the load forces imposed by the aerial
platform in all operating conditions before the speed
level is used.

Engine Protection Systems

A constant alarm will sound to warn against high engine
temperature or low oil pressure.

The engine will shut-down

if the operating temperature exceeds a preset level

y

or if the oil pressure is too low for safe operation.

y

High Engine Temperature Alarm

If the coolant exceeds the engine operating temperature
an alarm will sound and the engine will shut off.

Do not restart the engine until the condition that caused
the overheating has been corrected.

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 4.6).

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.

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 Light

The optional fl ashing light mounted on the machine may
be used to warn personnel that the aerial platform is in
the area.

Low Oil Pressure Alarm

The low oil pressure alarm sounds when the engine oil
pressure is near the lower limit for safe engine operation.
If the alarm sounds, lower the platform to the ground and
then turn the engine off.

If the engine oil pressure falls below a safe operating

y

value the engine will shut off.

The engine can be restarted with low oil pressure,

y

but it will only run for a few seconds before it shuts
off again.

Do not restart the engine until the condition that

y

caused the low oil pressure has been corrected.

The lights fl ash at about one fl ash per second when the
engine is running.

SR3084SL – 8210037 13

Chapter 4 – Safety Devices

14 SR3084SL – 8210037

Chapter 5 – Gauges and Displays

The aerial platform is equipped with several gauges to
monitor the condition of the machine before and during
operation.

Display Screen

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

Emergency

Emergency

Stop

Stop

Display

Display
Screen

Screen

Figure 5.1 – Upper Controls

The display screen shows:

For example, if pressing the right steer 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.

5. Push the emergency stop button inward.

Fuel Gauge

The fuel gauge is located on the front of the fuel tank
(refer to Figure 5.2) located behind the doors on the right
side of the chassis. It shows the actual level of the fuel
in the tank.

Fuel GaugeFuel Gauge

general operators information.

y

fault codes used to locate and eliminate situations

y

where machine operation may be interrupted.

Note
Refer to Chapter 1 1 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, turn the on/off
switch to the on position, and press the start button
to start the engine.

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

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

Figure 5.2 – Fuel Tank

Note
Do not run a diesel fuel tank empty. Air in the fuel line
makes the engine hard to start.

Engine Oil

The engine oil level is measured with a dipstick (refer
to Figure 5.3). The dipstick is the only way to accurately
determine the engine oil level. The engine oil level should
always be between the add and full marks on the dip­stick.

Oil DipstickOil Dipstick

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

SR3084SL – 8210037 15

Figure 5.3 – Engine Compartment

Chapter 5 – Gauges and Displays

Hydraulic Fluid Level Gauge

The hydraulic fl uid level gauge is on the front of the
hydraulic oil tank (refer to Figure 5.4) located behind the
doors on the left side of the chassis. The fl uid should be
between the minimum and maximum lines.

Hydraulic Fluid

Hydraulic Fluid

Gauge

Gauge

Figure 5.4 – Fuel Tank

Only read the fl uid level when the scissor structure is
completely lowered. Otherwise, the lift cylinders become
large reservoirs for hydraulic oil and the oil level in the
tank will be low. The oil level should be within ± 0.25″
(6.4 mm) of the maximum line.

Engine Air Filter Gauge

The air fi lter gauge (refer to Figure 5.5) is located in the
engine compartment behind the doors on the right side
of the chassis.

Air Filter Gauge

Air Filter Gauge

Reset Button

Reset Button

Figure 5.5 –Engine Compartment

The air fi lter gauge measures the air pressure between
the intake manifold and the air fi lter.

When the red indicator disk is visible through the clear
area of the gauge, it’s time to change the fi lter element.
After changing the fi lter, press the reset button to reset
the indicator disk.

16 SR3084SL – 8210037

Chapter 6 – 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.

Controls to position the platform are located on the

y

lower control panel on the chassis and on the upper
control panel in the platform.

Controls to drive the aerial platform are located on the

y

upper control panel only.

Lower Controls

The lower controls (refer to Figure 6.1) are located on
the left side of the chassis. Only platform functions can
be operated from the lower controls.

Emergency

Emergency

Stop

Stop

On/Off Switch

On/Off Switch

When the engine is cold, press and hold the preheat

y

button for approximately fi ve seconds before starting
the engine.

Start Button

The engine can be started from the lower controls using
the start button (refer to Figure 6.1).

Press and hold the start button until the engine

y

starts.

Emergency Stop Button

The emergency stop (refer to Figure 6.1) is a two-position
red push button.

Push the emergency stop button inward to disconnect

y

power to the lower controls.

Twist the emergency stop button clockwise to restore

y

power.

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

Platform Raise

Platform Raise

Preheat

Preheat

Upper Controls

Upper Controls

Emergency Stop

Emergency Stop

Override

Override

Platform

Platform

Lower

Lower

Enable

Enable

Start

Start

Figure 6.1 – Lower Controls

The following are located on the lower control panel:

On/off switch

y

Preheat button

y

Start button

y

Emergency stop button

y

Upper controls emergency stop override

y

Enable button

y

Platform raise button

y

Platform lower button

y

On/Off Switch

The on/off switch (refer to Figure 6.1) is used to connect
power to the lower and upper controls.

Upper Controls Emergency Stop Override

The platform can be lowered in an emergency from the
lower controls using the upper controls emergency stop
override (refer to Figure 6.1).

Hold the upper controls emergency stop override

y

switch upward to enable the lower controls.

Enable Button

The enable button (refer to Figure 6.1) must be pressed
when operating the platform raise or lower from the lower
controls.

Hold the button inward continually to operate the

y

platform raise or lower from the lower controls.

Platform Raise Button

The platform raise button (refer to Figure 6.1) is used to
raise the platform.

To raise the platform press and hold the platform raise

y

and the enable button. Release the buttons when the
desired height is reached.

Platform Lower Button

The platform lower button (refer to Figure 6.1) is used to
lower the platform.

When the on/off switch is in the off position the lower

y

and upper controls will not operate.

To operate the machine turn the on/off switch to the

y

on position.

Preheat Button

To lower the platform press and hold the platform lower

y

and the enable button. Release the buttons when the
desired height is reached.

The lowering alarm will sound as the platform low-

y

ers.

The preheat button (refer to Figure 6.1) operates the glow
plugs to aid in starting the engine when the on/off switch
is in the on position.

SR3084SL – 8210037 17

Chapter 6 – Controls

Upper Controls

The upper controls (refer to Figure 6.2) are located on the
control panel at the platform. Platform and drive functions

can be operated from the upper controls.

Interlock Switch

Emergency

Emergency

Stop

Stop

Speed

Speed

Level

Level

Low Speed

Low Speed

Drive

Drive

High Speed

High Speed

Drive

Drive

Interlock Switch

Start

Start

Preheat

Preheat

Platform Raise/Lower

Platform Raise/Lower

Horn

Horn

Steer

Steer

Switch

Switch

Joystick

Joystick

Figure 6.2 – 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 right side
of the platform, hooked on the guardrail, and hanging
inside the platform.

and upper control box arrows will point the same direction,
towards the front of the machine. Refer to Figure 6.3.

The following controls are located on the upper control
panel:

y

Preheat button

y

Start button

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

Speed level button

y

Horn

Preheat Button

The preheat button (refer to Figure 6.2) operates the glow
plugs to aid in starting the engine when the on/off switch
is in the on position.

y

When the engine is cold, press and hold the preheat
button for approximately fi ve seconds before starting
the engine.

Start Button

The engine can be started from the upper controls using
the start button (refer to Figure 6.2).

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 move­ments will not correspond.

The red arrows at the front of the right guardrail and right
side of the upper controls indicate the proper placement
of the upper controls. Refer to Figure 6.3.

Upper Controls

Upper Controls

Right Guardrail

Right Guardrail

Figure 6.3 – Upper Control Operating Position

Only operate from the upper controls when it is at the front
right side of the platform, hooked on the guardrail, and
hanging inside the platform. In this position the guardrail

y

Press and hold the start button until the engine
starts.

Emergency Stop Button

The emergency stop (refer to Figure 6.2) is a two-position,
red push button on the top of the upper control panel.

y

Push the emergency stop button inward to disconnect
power to all the controls circuits.

y

Twist the emergency stop 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 6.2) 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.

18 SR3084SL – 8210037

Chapter 6 – Controls

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.

Interlock Switch

The joystick has an interlock switch in the handle (refer
to Figure 6.2).

y

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

y

Engage the interlock to activate the steering, drive,
lift or speed level functions.

Steer Switch

The steer switch (refer to Figure 6.2) 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.

To drive the platform in reverse at low speed, press

y

the low speed drive button and then pull the joystick
backward, the direction of the yellow arrow.

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 6.2) is
used with the joystick to raise and lower the platform.

To raise the platform press the platform raise/lower

y

button and then push the joystick forward, the direc­tion of the red arrow.

To lower the platform press the platform raise/lower

y

button and then pull the joystick backward, the direc­tion of the yellow arrow. The lowering alarm will sound
as the platform lowers.

Note
The platform will not raise or lower while driving.

Speed Level Button

The speed level button (refer to Figure 6.2) may be used
to level the platform when the aerial platform chassis is
out of level more than four degrees side-to-side or front­to-rear. The speed level cannot be set if the aerial platform
chassis is out of level more than 13 degrees side-to-side
and 9 degrees front-to-rear.

High Speed Drive

The high speed drive button (refer to Figure 6.2) is used
to set the drive speed to high (3.1 mph [5.0 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 6.2) is used
to set the drive speed to low (0.45 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.

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.

The aerial platform must be on a fi rm, fl at surface capable
of withstanding the load forces imposed by the aerial
platform in all operating conditions before the speed
level is used.

To operate the speed level:

1. Press the platform raise/lower button and use the
joystick to raise or lower the platform to approximately
2′ (600 mm).

The tilt alarm will sound if the aerial platform

y

chassis is out of level more than four degrees
side-to-side or front-to-rear when the platform
is raised.

2. Press and hold the speed level button and the inter­lock switch until the platform is level.

The tilt alarm will continue to sound until the

y

platform is level.

SR3084SL – 8210037 19

Chapter 6 – Controls

While the speed level is set, only the platform

y

raise and lower functions will work.

3. Press the platform raise/lower button and then push
the joystick forward to raise the platform to the desired
height.

While the speed level is set only the platform

y

raise and lower functions will work.

4. To drive the machine, the speed level must be deac­tivated.

To deactivate the speed level, press the platform

y

raise/lower button and then pull the joystick back­ward and fully lower the platform.

Horn Button

The horn button (refer to Figure 6.2) is located on the
upper control panel.

Press the button to sound the horn.

20 SR3084SL – 8210037

Chapter 7 – 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.

Operator’s Manual

The manual holder is located at the front of the platform
(refer to Figure 7.1).

Operator’s Manual HolderOperator’s Manual Holder

Radiator Cap

Radiator Cap

Radiator

Radiator

Oil Dipstick

Oil Dipstick

Figure 7.2 – Engine Compartment

To inspect the engine:

1. Open the engine compartment doors and visually in­spect the engine and its components with the engine
off.

2. Inspect the latch mechanisms to make certain they
are in good working condition to hold the engine cover
in place.

3. Make sure that the engine compartment doors are
fully closed and latched before operating the machine
after inspection or service.

Figure 7.1 – 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.

Engine

Visually inspect the engine and its components with the
engine off. The engine is located behind the doors on the
right side of the chassis (refer to Figure 7.2).

Oil Level

The proper oil level is between the two marks on the
dipstick.

To inspect the oil level:

1. Make sure the engine has been off for at least fi ve
minutes before checking the oil level. This will allow
time for the oil to drain to the pan for a more accurate
oil level reading.

2. Remove the dipstick (refer to Figure 7.2) and check
to see that the oil level is between the two marks.

3. If necessary, add oil before starting the engine.

Note
Refer to Chapter 2 for the correct engine oil grade and
weight.

Coolant

To inspect the coolant level:

ACaution

Engine coolant escaping under pressure may cause
serious burns. Shut the engine off and let it cool
before removing the radiator cap.

1. Shut the engine off and wait for it to cool.

SR3084SL – 8210037 21

Chapter 7 – Prestart Inspection

2. Remove the cap from the radiator (refer to Figure

7.2) and check the coolant level. If necessary, add
coolant.

Note
Refer to Chapter 2 for engine coolant specifi cations. The
need to regularly add fl uid indicates a leak that should
be corrected.

3. Tightly replace the cap.

Radiator

To inspect the radiator:

1. Inspect the radiator hoses and clamps for wear, leak­age, or damage.

2. Make sure the hoses are not hardened, cracked, or
feel spongy.

3. Make sure the cap is in place and tight.

4. Check under the chassis for coolant that has leaked.
Coolant leaks are easily visible on the ground.

5. Make sure the radiator core and ventilation openings
on the cover are free of bugs, dirt, or foreign material
that might restrict airfl ow.

4. Make sure the cap is securely fastened.

Fuel Line

To inspect the fuel line:

1. Visually inspect the entire length of the fuel line start­ing at the fuel tank.

2. Trace the line to the engine, inspecting for leaks and
damage.

Air Filter

The air fi lter gauge (refer to Figure 7.4) has an indicator
to show when the fi lter needs replaced.

Air Filter Gauge

Air Filter Gauge

Reset Button

Reset Button

Fuel Tank

The fuel level gauge is behind the doors on the right side
of the chassis (refer to Figure 7.3). The gauge shows the
actual level of fl uid in the tank.

Fuel GaugeFuel Gauge

Figure 7.3 – Fuel Gauge

To inspect the fuel tank:

1. Open the doors on the right side of the chassis to
access the fuel gauge.

2. Check fuel level indicated on the gauge.

3. If necessary, add fuel.

Note
Refer to Chapter 2 for fuel grade specifi cations.

Figure 7.4 – Air Filter Gauge

To inspect the air fi lter:

3. At the lower controls, twist the emergency stop but­ton clockwise and place the on/off switch to the on
position.

4. Press and hold the start button until the engine
starts.

5. Open the doors on the right side of the chassis
to access the air fi lter gauge (refer to Figure 7.4).
Check the clear zone after running the engine for 30
seconds.

y

If the indicator is red, replace the fi lter. After re-
placing the fi lter, press the reset button to reset
the indicator disk.

y

If the indicator is clear, the fi lter is OK.

6. Shut off the engine.

Electrical System

Electrical power is supplied from a 550 CCA, 12 V bat­tery. The battery is behind the doors on the right side of
the chassis, next to the fuel tank (refer to Figure 7.5).
The battery supplies 12 V DC electrical power to oper­ate the aerial platform electrical and electrohydraulic
components.

22 SR3084SL – 8210037

Chapter 7 – Prestart Inspection

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.

TerminalsTerminals

Figure 7.5 – Battery

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.

Hydraulic System

Hydraulic power is supplied from an engine driven gear
pump mounted on the engine.

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 behind the door on the right side
of the chassis. The pump is mounted on the engine.

Fluid Level

To inspect the fl uid level:

1. Place the aerial platform on a level surface with the
platform fully stowed.

2. Open the doors on the left side of the chassis to ac­cess the hydraulic fl uid level gauge (refer to Figure

7.6).

The battery is automatically charged when the engine is
running. Include the battery when inspecting and servicing
the electrical system.

For optimal battery performance the battery connections
must be kept clean.

Battery Terminals

To inspect the battery terminals:

1. Check the top of the battery, the terminals, and cable
ends (refer to Figure 7.5). They should be clean and
free of corrosion.

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.

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.

Full

Full

Add

Add

Figure 7.6 – Hydraulic Fluid Gauge

3. Make sure the fl uid level is between the minimum
and maximum lines.

Hydraulic Fluid

Hydraulic Fluid

Gauge

Gauge

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, remove the fi ller cap and add fl uid of
the proper type. Replace the cap making sure it is
tightly in place.

SR3084SL – 8210037 23

Chapter 7 – Prestart Inspection

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.

Fluid Filter

Checking the condition of the hydraulic fl uid fi lter is part
of the machine maintenance schedule and should not be
performed by the operator.

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 7.7).

Figure 7.8 – Tires and Wheels

The aerial platform has air fi lled tires. Air fi lled tires have
a tire pressure decal near the valve stem. The valve stem
also has a valve core like an automobile tire.

ADanger

The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tipover ac­cident. Do not operate the aerial platform if a tire is
leaking air or is in poor condition where a blow out
could occur.

Figure 7.7 – Hoses, Tubes, and Fittings

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 7.8)
to make sure they are suitable for service.

To inspect air fi lled tires and wheels:

1. Check the wheel lug nuts to see that none are miss­ing, damaged, or loose.

2. Carefully inspect the tires for wear, cuts, punctures,
or imbedded objects.

3. Test the air pressure with a pressure gauge to make
sure the tires are properly infl ated. Check the tires
several times throughout the day to see that they are
properly infl ated.

Lower Control Station

With no personnel or materials in the platform, test the
operation of each control from the lower controls (refer
to Figure 7.9).

Emergency

Emergency

Stop

Stop

On/Off Switch

On/Off Switch

Platform Raise

Platform Raise

Preheat

Preheat

Upper Controls

Upper Controls

Emergency Stop

Emergency Stop

Override

Override

Platform

Platform

Lower

Lower

Enable

Enable

Start

Start

Figure 7.9 – Lower Controls

24 SR3084SL – 8210037

Operating Controls

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

1. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock­wise.

2. Operate the preheat button if required.

y

When the engine is cold, press and hold the
preheat button for approximately fi ve seconds
before starting the engine.

3. Press and hold the start button until the engine starts,
then release.

Chapter 7 – Prestart Inspection

Emergency

Emergency

Lowering Knob

Lowering Knob

Figure 7.10 – Emergency Lowering Knob

4. Let the engine warm to operating temperature.

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 preforming 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 and lower
buttons in both directions.

To raise the platform press and hold the platform

y

raise and the enable button.

To lower the platform press and hold the platform

y

lower and the enable button.

Emergency Stop

To test the emergency stop button from the lower con­trols:

1. Push the emergency stop button (refer to Figure 7.9)
inward to disconnect power to the lower controls and
to turn off the engine.

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

Emergency Lowering

The platform can be lowered in an emergency using the
emergency lowering knob located at the left side of the
aerial platform (refer to Figure 7.10). The emergency
lowering knob allows the platform to be lowered if there
is a malfunction in the hydraulic or electrical system. Only
use this method if the engine will not start.

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. Turn the engine off.

3. Locate the emergency lowering knob at the left side
of the chassis (refer to Figure 7.10).

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.

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

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

6.

Release the knob to stop the platform from lowering.

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.

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

SR3084SL – 8210037 25

Chapter 7 – Prestart Inspection

Upper Controls Emergency Stop Override

The upper controls emergency stop override allows
the platform to be lowered from the lower controls in
the event the upper controls emergency stop button is
depressed.

Use the following procedure to test the upper controls
emergency stop override:

1. At the upper controls, press the emergency stop
button inward.

2. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock­wise.

3. Hold the upper controls emergency stop override
switch upward to active the lower controls, and press
the start button to start the engine.

4. While holding the upper controls emergency stop
override switch upward, test the operation of the
lower controls.

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 Light

The machine may be equipped with an optional fl ashing
light mounted to the machine.

To inspect the fl ashing light:

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 arm welds around pin bosses.
The area to be inspected should be clean and free
of dirt and grease.

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.

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 that connect the elevating assembly. They
should all be present, tight, and not damaged in any
way.

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 7.11):

A top rail

y

A mid rail

y

An entry gate

y

Toeboards around the sides of the platform.

y

Top Rail

Top Rail

Mid Rail

Mid Rail

1. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock­wise.

2. Visually check to see that the light is fl ashing ap-

Entry

Entry

Gate

Gate

proximately one fl ash per second.

Toeboard

Toeboard

Note
There is not an off switch for the fl ashing light. The light
cannot be turned off while the engine is running.

Structures

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

To inspect the guardrail system:

1. Inspect all components of the guardrail system. The

Figure 7.11 – Platform

rails and toeboards must all be in place and free of
any damage or deformation.

26 SR3084SL – 8210037

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

Chapter 7 – Prestart Inspection

Upper Controls

Upper Controls

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

4. Inspect the entry gate so see that it swings freely,
latches securely, and is not deformed in any way.

Lanyard Anchors

There are six lanyard anchors on the fl oor of the platform
(refer to Figure 7.12):

Lanyard

Lanyard

Anchor

Anchor

Figure 7.12 – Platform

To inspect the lanyard anchors:

Right Guardrail

Right Guardrail

Figure 7.13 – Upper Control Operating Position

Only operate from the upper controls when it is at the front
right side of the platform, hooked on the guardrail, and
hanging inside the platform. In this position the guardrail
and upper control box arrows will point the same direction,
towards the front of the machine. Refer to Figure 7.13.

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

1. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock­wise.

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

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 right side
of the platform, hooked on the guardrail, and hanging
inside 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 move­ments will not correspond.

The red arrows at the front of the right guardrail and right
side of the upper controls indicate the proper placement
of the upper controls. Refer to Figure 7.13.

3. Operate the preheat button if required.

When the engine is cold, press and hold the

y

preheat button for approximately fi ve seconds
before starting the engine.

4. Press and hold the start button until the engine starts,
then release.

5. Let the engine warm to operating temperature.

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.

SR3084SL – 8210037 27

Chapter 7 – Prestart Inspection

6. Test the interlock switch by moving the joystick with­out engaging the interlock switch (refer to Figure

7.14).

Interlock Switch

Emergency

Emergency

Stop

Stop

Speed

Speed

Level

Level

Low Speed

Low Speed

Drive

Drive

High Speed

High Speed

Drive

Drive

Interlock Switch

Start

Start

Preheat

Preheat

Platform Raise/Lower

Platform Raise/Lower

Steer

Steer

Switch

Switch

Joystick

Joystick

Figure 7.14 – Upper Controls

If movement occurs the interlock is not functioning

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

7. 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.

Emergency Stop

To test the emergency stop button from the upper con­trols:

1. Push the emergency stop button (refer to Figure 7.14)
inward to disconnect power to all control circuits and
to turn off the engine.

2. Test the upper controls to ensure they no longer
operate.

Horn Button

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

7.14).

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.

8. 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.

9. 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.

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

y

steer switch.

10. 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.

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.

28 SR3084SL – 8210037

Chapter 7 – Prestart Inspection

0010076-001

0010076-001

066554-000

0072530

010076-001

066551-003

508770-000

Left Side

067822-001

508772-000

066554-000

066551-003

508770-000

067822-001

508772-000

SR3084SL – 8210037 29

Chapter 7 – Prestart Inspection

066563-000

101250-007

066551-002

508738-000

(Inside)

066555-000

(Inside)

0323896

Left Side

101250-007

066551-002

067822-001

067822-001

066563-000

0323896

066555-000

508738-000

30 SR3084SL – 8210037

Chapter 7 – Prestart Inspection

066551-002

508771-000

057430-000

(Inside)

0323896

066551-002

057430-000

0323896

Right Side

508771-000

SR3084SL – 8210037 31

Chapter 7 – Prestart Inspection

Prestart Inspection Checklist

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

Oil Level Between full and add marks
Coolant Proper fl uid level
Radiator Cap tight, good condition and clean
Fuel tank and line Tank full, cap in place and tight/no leaks
Air fi lter Good condition

Electrical System

Battery Condition and charged for proper operation
Battery terminals Clean, connectors tight
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

Tires

Air fi lled Good condition, proper infl ation

Wheels All wheel lug nuts present and properly torqued
Lower Control Station

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

Emergency Lowering Proper operation
All Motion Alarm Sounds when machine is operated and/or driven
Flashing Light Proper operation
Lowering Alarm Sounds when platform is lowered
Structures

Weldments Welds intact, no damage or deformation
Fasteners In place, tight, and no damage

Upper Control Station

Guardrail system Welds intact, no damage or deformation
Lanyard anchors In place, no damage or deformation
Operating controls Proper operation
Emergency stop Shuts off upper controls/proper operation
Horn Sounds when activated

Placards and Decals In place and readable

32 SR3084SL – 8210037

Chapter 8 – 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.

Manually Warming The Hydraulic System

The hydraulic oil may be warmed by bottoming out the
platform lift cylinder. Lower the platform so the cylinder
is bottomed out; the oil fl ow will produce heat to warm
the hydraulic oil.

ACaution

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

Use cold weather hydraulic oil as recommended in the
machine General Specifi cations in temperatures of 10°F
(0°C) or below.

Preheat Button

The preheat button is used to warm the engine if the
ambient temperature is 32°F (0°C) or below.

With diesel engines, the preheat switch will activate

y

the glow plugs.

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.

Cold Weather Start Up

If the ambient temperature is 32°F (0°C) or below, the
engine and hydraulic system oil may need to be warmed
up before operation. Do not operate the engine at more
than a fast idle until the engine and hydraulic oil has had
a chance to warm.

Cold, thick hydraulic oil does not fl ow well and may cause
delay in response to control movement. Cold hydraulic oil
may also cause cavitation and pump damage.

PreheatPreheat

Figure 8.1 – Lower Controls

When starting a diesel engine from the upper or lower
controls (refer to Figures 8.1 and 8.4):

If the engine is cold, press and hold the preheat

y

button for approximately fi ve seconds before
starting the engine.

Preparing for Operation

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

1. Perform a prestart inspection (refer to Chapter 7).

2. Close and latch the doors.

3. Place the on/off switch in the on position.

SR3084SL – 8210037 33

Chapter 8 – Operation

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 posi­tioning the platform while testing and during inspection.

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

Use the following procedure operate the machine from
the lower controls (refer to Figure 8.2):

Emergency

Emergency

Stop

Stop

Upper Controls

Upper Controls

Emergency Stop

Emergency Stop

Override

Override

Figure 8.2 – Lower Controls

On/Off Switch

On/Off Switch

Platform

Platform

Lower

Lower

Platform Raise

Platform Raise

Preheat

Preheat

Start

Start

Enable

Enable

6. Release the buttons to stop movement.

7. Push the emergency stop button inward when no
functions are being operated.

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 right side
of the platform, hooked on the guardrail, and hanging
inside 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 move­ments will not correspond.

The red arrows at the front of the right guardrail and right
side of the upper controls indicate the proper placement
of the upper controls. Refer to Figure 8.3.

1. From the upper controls, twist the emergency stop
button clockwise.

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

3. Operate the preheat button if required.

y

When the engine is cold, press and hold the
preheat button for approximately fi ve seconds
before starting the engine.

4. Press the start button until the engine starts, then
release. Let the engine warm to operating tempera­ture.

5. Press the enable button and appropriate platform
raise or lower button to raise or lower the platform.

ADanger

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

To raise the platform press and hold the platform

y

raise and the enable button.

To lower the platform press and hold the platform

y

lower and the enable button.

Upper Controls

Upper Controls

Right Guardrail

Right Guardrail

Figure 8.3 – Upper Control Operating Position

Only operate from the upper controls when it is at the front
right side of the platform, hooked on the guardrail, and
hanging inside the platform. In this position the guardrail
and upper control box arrows will point the same direction,

towards the front of the machine. Refer to Figure 8.3.

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

1. At the lower controls, turn the on/off switch to the
on position and twist the emergency stop clockwise
(refer to Figure 8.2).

34 SR3084SL – 8210037

Chapter 8 – Operation

2. Enter the platform and securely close the gate.

3. At the upper controls, twist the emergency stop button
clockwise (refer to Figure 8.4).

Interlock Switch

Emergency

Emergency

Stop

Stop

Speed

Speed

Level

Level

Low Speed

Low Speed

Drive

Drive

High Speed

High Speed

Drive

Drive

Interlock Switch

Start

Start

Preheat

Preheat

Platform Raise/Lower

Platform Raise/Lower

Steer

Steer

Switch

Switch

Joystick

Joystick

Figure 8.4 – Upper Controls

4. Operate the preheat button if required.

y

When the engine is cold, press and hold the
preheat button for approximately fi ve seconds
before starting the engine.

5. Press the start button until the engine starts, then
release. Let the engine warm to operating tempera­ture.

Platform

Use care when entering and exiting the platform to avoid
slipping and/or falling. Fully close the entry 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.

2. Press the platform raise/lower button and then push
the joystick forward while engaging the interlock
switch.

3. If the tilt alarm sounds, lower the platform and drive
to a level surface or activate the speed level to level
the platform.

Leveling

The speed level button (refer to Figure 8.4) may be used
to level the platform when the aerial platform chassis is
out of level more than four degrees side-to-side or front­to-rear. The speed level cannot be set if the aerial platform
chassis is out of level more than 13 degrees side-to-side
and 9 degrees front-to-rear.

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.

The aerial platform must be on a fi rm, fl at surface capable
of withstanding the load forces imposed by the aerial
platform in all operating conditions before the speed
level is used.

To operate the speed level:

1. Press the platform raise/lower button and use the
joystick to raise or lower the platform to approximately
2′ (600 mm).

The tilt alarm will sound if the aerial platform

y

chassis is out of level more than four degrees
side-to-side or front-to-rear when the platform
is raised.

2. Press and hold the speed level button and the inter­lock switch until the platform is level.

The tilt alarm will continue to sound until the

y

platform is level.

While the speed level is set, only the platform

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

y

raise and lower functions will work.

transported.

3. Press the platform raise/lower button and then push

Raising and Lowering

The raise speed is proportional to the joystick position.

the joystick forward to raise the platform to the desired
height.

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

4. To drive the machine, the speed level must be deac­tivated.

Use the following procedure to raise the platform:

To deactivate the speed level, press the platform

y

1. Move the aerial platform to a fi rm, fl at, level sur-
face.

SR3084SL – 8210037 35

raise/lower button and then pull the joystick back­ward and fully lower the platform.

Chapter 8 – Operation

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 35 percent.

A fully stowed machine may be operated on grades up
to 35 percent. A grade of 35 percent is a 42″ (1.07 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.

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

5. After driving to the desired location, return the joystick
to neutral, or push the emergency stop button inward
to apply the parking brakes.

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.

Select the high speed drive button when travel-

y

ing across fi rm, fl at, level surfaces. High range
can only be activated when the platform is fully
lowered.

Select the low speed drive button when driving on

y

loading ramps or other steep grades and when
safety considerations demand slow deliberate
machine movement.

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.

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

y

the steer switch.

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

y

steer switch.

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.

Do not use the aerial platform if it drives faster than

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

Lowering Alarm

The lowering alarm sounds loud intermittent beeps any­time the aerial platform is lowered.

All Motion Alarm

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

Gradeability

Gradeability refers to the maximum slope that the aerial
platform is capable of travel. Gradeability can be de­scribed as “theoretical” or “actual” with the slope, or grade,
measured in percent of slope or degree of slope.

Theoretical Gradeability

Theoretical machine gradeability refers to the maximum
slope that the machine is capable of travel under perfect,
or theoretical, conditions. It is based on mathematical
calculation, not practical application.

36 SR3084SL – 8210037

Chapter 8 – Operation

Some of the factors taken into consideration when cal­culating theoretical gradeability include:

y

Drive motor effi ciency

y

Machine weight

y

Machine center of gravity

y

Tire traction

y

Tire contact

y

Condition of slope

The value for theoretical gradeability will most always be
high when compared to the actual gradeability value. The
perception then is that the machine can climb a steeper
slope than is actually practical.

Actual Gradeability

Actual machine gradeability refers to the maximum slope
that the machine is capable of travel under practical condi­tions. It, too, is based on mathematical calculation, but it
also takes into account the practical application.

At any given moment when driving the machine on a
slope, at least one, if not all, of the factors contributing
to achieving theoretical gradeabilty will not be at optimal
performance. For example, tire contact may not be the
same at each drive wheel or the slope conditions may not
be optimal, which would then allow for loss of traction.

The value for actual gradeability will always be lower
than the theoretical gradeability value. The perception
then is that the machine can not climb a slope as steep
as it should.

Percent vs. Degree of Slope

Gradeability is most often referenced as a percentage.
That value is based on a slope angle of 45° representing
100% grade.

Angle indicators, or inclinometers, often measure the
angle of the slope in degrees not the percent slope.
Because of that, it may be useful to understand the re­lationship between percent slope and the degree of the
slope angle as shown in Figure 8.5.

Driving on a Slope

The machine should only be driven on a slope or load­ing ramp in the stowed position with the platform on the
downhill side.

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 slopes that exceed 35 percent
grade, or where conditions of the slope could cause
driving to be hazardous.

Angle of Slope

in Degrees

45°

40°

35°

30°

25°

20°

15°

10°

5°

100%

95%

90%

85%

80%

75%

70%

65%

60%

55%

50%

45%

40%

35%

30%

25%

20%

15%

10%

5%

0

Percent of

Grade

Figure 8.5 – Slope Percent/Degree Conversion

SR3084SL – 8210037 37

Chapter 8 – Operation

Length

Height

Length

Height

% of Grade

=

x

100

Place the drive speed in the low position before attempt­ing to drive the machine on a slope.

Drive the aerial platform only on slopes, or loading ramps
that are within the 35 percent grade capability of the
aerial platform.

Calculate the percent grade:

y

before attempting to climb an unknown grade

y

if it is believed that there is a malfunction to determine
if the slope is within the actual grade capability of the
aerial platform.

Calculating Percent Grade

The percent grade equals the height (rise) of the slope di­vided by the length (run) times 100. Refer to Figure 8.6.

3. Use the tape measure to measure the distance
(height) from the end of the 2 x 4 to the ground.
Record the height distance.

4. Measure the length of the 2 x 4 and record this mea­surement.

5. Use the formula in Figure 8.6 to calculate the percent
of the grade.

Machine Gradeability

The gradeability specifi cation for the aerial platform is
listed below.

Gradeability – theoretical.........................................38%

Theoretically, when all contributing factors are optimal,
the machine can be driven on a slope of 38%. A slope
with a percent grade of 38% is a slope with an angle of

20.8 degrees.

Gradeability – actual................................................35%

An actual gradeability of 35%, indicates that in most nor­mal working conditions the machine can be driven on a
slope with an angle of 19.3 degrees.

Figure 8.6 – Percent Grade Formula

The grade can be measured with an inclinometer or by
using a tape measure, a level, and a straight 2 x 4. If
using an inclinometer, refer to the conversion diagram
if necessary.

To measure the grade without an inclinometer, use the
following procedure.

1. With the 2 x 4 laying parallel with the slope, lay the
level lengthwise on the 2 x 4.

2. Holding the downhill end, raise the 2 x 4 until the
level indicates that the board is level (refer to Figure

8.7).

Length

Length

Fold Down Guardrails

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

A ½″ wrench and socket will be needed to remove the
hardware from the guardrail.

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.

Use the following procedure to fold down the guard­rails:

1. From the lower controls, fully lower the platform and
turn the machine off.

2. Enter the platform and close the gate.

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

Height

Height

Figure 8.7 – Percent Grade Calculation

38 SR3084SL – 8210037

Ground Slope

Ground Slope

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

ACaution

4. At the front of the platform, remove the hardware
(nuts, bolts, spacer, washers etc.) from the corners
of the front guardrail. Refer to Figure 8.8.

Rear Guardrail

Rear Guardrail

Hardware

Hardware

Chapter 8 – Operation

Side Guardrail Hardware

Side Guardrail Hardware

Front Guardrail

Front Guardrail

Hardware

Hardware

Figure 8.8 – Platform

5. Fold the front guardrail inward so it rests on the plat­form. Refer to Figure 8.9.

Rear Guardrail

Right

Guardrail

Rear

Left Guardrail

Front

Guardrail

Front

Figure 8.9 – Fold Down Guardrails

6. At the rear of the platform, close and latch the entry
gate and remove the hardware (nuts, bolts, spacer,
washers etc.) from the corners of the rear guardrail.

Refer to Figure 8.10.

Figure 8.10 – Lower Controls

7. Fold the rear guardrail inward so it rests on the plat­form being careful to keep the entry gate latched.
Refer to Figure 8.9.

8. Lift up on the right guardrail and fold it inward so it
rests on the platform. Repeat with the left guardrail.
Refer to Figure 8.9.

If the guardrail will not fold down, loosen the

y

hardware at the bottom of the side guardrail.
Refer to Figure 8.10.

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

1. Fully raise the right guardrail to the upright position
and push downward on the guardrail making sure it
securely sets into the platform. Repeat with the left
guardrail.

2. Fully raise the rear guardrail to the upright position,
being careful to keep the entry gate latched. Connect
the rear guardrail to the left and right guardrail by
reinstalling the hardware (nuts, bolts, spacer, wash­ers etc.) to the corners of the guardrails and tighten
securely. Refer to Figure 8.10.

3. Fully raise the front guardrail to the upright position.
Connect the rear guardrail to the left and right guard­rail by reinstalling the hardware (nuts, bolts, spacer,
washers etc.) to the corners of the guardrails and
tighten securely. Refer to Figure 8.8.

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 right side
of the platform, hooked on the guardrail, and hanging
inside the platform.

SR3084SL – 8210037 39

Chapter 8 – Operation

7. Replace the upper control panel on the front right
side of the guardrail, and hanging inside the platform.
Refer to Figure 8.11.

y

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

Right Guardrail

Right Guardrail

Figure 8.11 – Upper Control Operating Position

40 SR3084SL – 8210037

Chapter 9 – 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 9.1.

Figure 9.1 – Stowed Position

Use the following procedure to properly stow the aerial
platform.

1. Fully lower the platform.

2. If the engine has just been under load and is hot, let
it idle for fi ve minutes before turning it off.

A 35 percent grade is a 42″ (1.07 m) vertical rise in 10′
(3.05 m) horizontal length.

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.

3. At the upper controls, push the emergency stop but­ton inward.

4. Close and latch the platform entry gate.

5. At the lower controls, push the emergency stop button
inward. Place the on/off switch in the off position and
remove the key.

6. Close and latch the cowling doors.

Transporting

The aerial platform may be moved on a transport vehicle.
Depending on the particular situation, the aerial platform
may be 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 35 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 35 percent grade capability of
the aerial platform.

1. Properly stow the aerial platform.

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

ADanger

Lifting the aerial platform with the forklift forks posi­tioned improperly can produce enough force to dam­age machine components. When lifting the machine
from the side, place the forklift forks directly under
the designated lift points.

3. To lift the machine from the side, place the forklift
forks directly under the designated points under the
chassis (refer to Figure 9.2).

SR3084SL – 8210037 41

Chapter 9 – Stowing and Transporting

Figure 9.2 – Forklift

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. 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. Fully lower the aerial platform into the stowed posi­tion.

ACaution

The aerial platform has low ground clearance. Make
certain that the transition from the loading ramp to
the trailer is not sharp enough that the bottom of the
machine drags while loading.

4. Properly stow the aerial platform.

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. Open the door on the left side of the chassis. Close
the free-wheeling valve by turning the Allen screw

clockwise. The free-wheeling valve is located on the

hydraulic manifold (refer to Figure 9.3).

Free-Wheeling

Free-Wheeling

Valv e

Valv e

Brake Release

Brake Release

Pump

Pump

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.

Figure 9.3 – Free-Wheeling Valve

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.

42 SR3084SL – 8210037

7. Insert the handle into the brake release pump (refer
to Figure 9.3). Pump the brake release pump sev­eral times to release the brakes then remove the
handle.

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

9.4) on the front of the chassis.

Handle

Handle

Tie-Down/Lifting LugsTie-Down/Lifting Lugs

Figure 9.4 – Front Tie-Down/Lifting Lugs

9. 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.

Chapter 9 – Stowing and Transporting

The user assumes all responsibility for:

y

Making sure the equipment used is capable of sup­porting the weight of the aerial platform.

y

Making sure all manufacturer’s instructions and warn­ings, 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 9.4 and 9.5) to make sure they
are free of cracks and are in good condition. There
are four lugs on the rear of the chassis and two on
the front. Have any damage repaired by a qualifi ed
service technician before attempting to hoist the
machine.

10. After moving the aerial platform, turn the free-wheel­ing valve counterclockwise until the valve is fully
open. Refer to Figure 9.3.

11. 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.

y

Lifting devices include the hoist or crane, chains,
straps, cables, hooks, sheaves, shackles, slings, and
other hardware used to support the machine.

y

The empty vehicle weight is stamped on the serial
number placard and is listed in Chapter 2.

Tie-Down/Lifting LugsTie-Down/Lifting Lugs

Figure 9.5 – Rear Tie-Down/Lifting Lugs

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.

y

Cable damage and/or failure can result from the
cable contacting the sharp corners of the lug.

y

There is no effective way of putting a corner
protector in the hole of the lug.

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

SR3084SL – 8210037 43

Chapter 9 – Stowing and Transporting

When using cables, use rigid corner protectors

y

at any point where the cable contacts on sharp
corners to prevent damaging the cable.

Careful rigging of the spreaders is required to

y

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 lower controls emergency stop switch in the
off position. Turn the on/off switch to the off position
and remove the key.

5. Close and latch the cowling doors.

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.

6. 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.

44 SR3084SL – 8210037

Chapter 10 – Emergency Operation

If the emergency stop button at the upper controls is
depressed, the platform may be lowered and stowed in
an emergency using the upper controls emergency stop
override button. If the main hydraulic system fails the
aerial platform may be lowered and stowed using the
emergency lowering knob. The machine may be towed
if the drive system fails.

Refer to Emergency Lowering Knob, Upper Controls
Emergency Stop Override, or Towing for the appropriate
procedure.

Emergency Lowering Knob

The platform can be lowered in an emergency using the
emergency lowering knob located on the left side of the
machine under the lower control panel (refer to Figure

10.1).

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.

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

Upper Controls Emergency Stop Override

The upper controls emergency stop override (refer to
Figure 10.2) allows the platform to be lowered from the
lower controls in the event the upper controls emergency
stop button is depressed.

On/Off Switch

On/Off Switch

Emergency

Emergency

Lowering Knob

Lowering Knob

Figure 10.1 – Emergency Lowering Knob

The emergency lowering knob allows the platform to
be lowered if there is a malfunction in the hydraulic or
electrical system. Only use this method if the engine will
not start.

Use the following procedure to lower the platform:

1. Locate the emergency lowering knob at the left side
of the chassis (refer to Figure 10.1).

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.

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

3.

Release the knob to stop the platform from lowering.

Upper Controls

Upper Controls

Emergency Stop

Emergency Stop

Override

Override

Figure 10.2 – Lower Controls

1. At the upper controls, press the emergency stop
button inward.

2. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock­wise.

3. Hold the upper controls emergency stop override
switch upward to active the lower controls, and press
the start button to start the engine.

4. While holding the upper controls emergency stop
override switch upward, press and hold the enable
and platform lower button until the platform is fully
lowered.

Start

Start

Towing

The aerial platform may be towed at slow speeds. The
tow vehicle must have suffi cient capacity to safely tow
and stop itself and the aerial platform on the steepest
grade and type of surface that may be encountered.
Refer to Chapter 2 for the empty vehicle weight of the
aerial platform.

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

SR3084SL – 8210037 45

Chapter 10 – Emergency Operation

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. Open the door on the left side of the chassis. Close
the free-wheeling valve by turning the Allen screw

clockwise. The free-wheeling valve is located on the

hydraulic manifold (refer to Figure 10.3).

Free-Wheeling

Free-Wheeling

Valve

Valve

Brake Release

Brake Release

Pump

Pump

3. Insert the handle into the brake release pump (re­fer to Figure 10.3). Pump the brake release pump
several times to release the brakes then remove the
handle.

4. Do not exceed .68 mph (1.1 km/h) when towing.

AW arning

The aerial platform is free to move when the brakes
and free-wheeling valve are disabled. Death or seri­ous injury could result. Close the free-wheeling valve
and reset the brakes before operating the aerial
platform.

5. After moving the aerial platform, turn the free-wheel­ing valve counterclockwise until the valve is fully
open. Refer to Figure 10.3.

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

Handle

Handle

Figure 10.3 – Free-Wheeling Valve

46 SR3084SL – 8210037

Chapter 11 – 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

Engine will not start from lower or
upper controls.

Engine will not start from lower
controls.

Out of fuel. Add correct type of fuel. Try starting

the engine for 20 seconds and then
let the starter motor cool for 60 sec­onds. Repeat as necessary.

Engine is cold. Press and hold the preheat button for

approximately fi ve seconds before
starting the engine.

High engine temperature. Let engine cool. Do not restart the

engine until the cause of overheating
has been corrected.

Low oil pressure. Do not try to start the engine until

the cause of low oil pressure has
been corrected. The engine can be
restarted with low oil pressure, but it
will only run a few seconds before it
shuts off again.

Clogged air fi lter. Visually check the air fi lter gauge.

Engine oil too thick for ambient tem­perature.

Emergency stop buttons at lower
and upper controls are in the off
position.

Switches are set wrong. From the upper controls:

Refer to Chapter 2 for correct oil
weight.

At the lower and upper controls,
twist the emergency stop switch
clockwise.

Twist the emergency stop button

•
clockwise.

From the lower controls:

Twist the emergency stop button

•
clockwise.

Turn the on/off switch to the on

•
position.

Press the start button until the

•
engine starts.

Engine will not start from upper
controls.

SR3084SL – 8210037 47

Switches are set wrong. From the lower controls:

Twist the emergency stop button

•
clockwise.

Turn the on/off switch to the on

•
position.

From the upper controls:

Twist the emergency stop button

•
clockwise.

Press the start button until the

•
engine starts.

Chapter 11 – Troubleshooting

Symptom Possible Cause Corrective Action

Constant tone alarm sounds while
the engine is running.

High engine temperature. Lower the platform and turn the en-

gine off to let it cool. Do not restart the
engine until the cause of overheating
has been corrected.

Low oil pressure. Lower the platform and turn the

engine off. Do not restart the engine
until the cause of low oil pressure has
been corrected.

No alternator current/broken fan
belt.

Turn the engine off. Do not restart the
engine until the cause of no alterna­tor current has been corrected or the
fan belt has been replaced.

Constant tone alarm sounds and
engine shuts off.

High engine temperature. Let the engine cool. Do not restart

the engine until the cause of over­heating has been corrected.

Low oil pressure. Do not restart the engine until the

cause of low oil pressure has been
corrected. The engine can be re­started with low oil pressure, but it
will only run for a few seconds before
it shuts off again.

Engine or pump failure. Manually stow the machine using the

emergency lowering knob.

Electrical system malfunction. Manually stow the machine using the

emergency lowering knob.

All functions stop working. Low fl uid level in reservoir. Check fl uid level. Add correct type of

fl uid if necessary.

Engine or pump failure. Manually stow the machine using the

emergency lowering knob.

Electrical system malfunction. Manually lower the boom using the

emergency lowering knob.

Lower controls do not work. On/off switch is in the off position. Place switch in the on position.

Emergency stop buttons at lower
and upper controls are in the off
position.

At the lower and upper controls,
twist the emergency stop switch
clockwise.

Upper controls do not work. On/off switch is in the off position. Place switch in the on position.

Lift and drive functions seem slug­gish.

Emergency stop buttons at lower
and upper controls are in the off
position.

Hydraulic oil is cold and thick. Use cold weather hydraulic oil as

At the lower and upper controls,
twist the emergency stop switch
clockwise.

recommended for weather condi­tions. Warm oil before operating the
machine.

Platform drifts down. The emergency lowering knob is

open.

Push the emergency lowering knob
inward to close the valve.

Hydraulic system malfunction. Stow the machine and do not oper-

ate until repairs are made.

Platform will not raise and alarm is
sounding.

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

level surface or use the speed level
to level the platform.

48 SR3084SL – 8210037

Chapter 11 – Troubleshooting

Symptom Possible Cause Corrective Action

Platform will not raise or lower. Engine is not running. Start the machine from the control

station where you will operate the
machine.

Switches set wrong. From the lower controls:

y

Press the platform raise or lower
button and hold the enable but­ton.

From the upper controls:

y

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

Emergency lowering knob is open. Push the emergency lowering knob

inward to close the valve.

Machine not level. Lower the platform and drive to a

level surface or use the speed level
to level the platform.

Drive functions do not work. Drive/lift selector is in the lift posi-

tion.

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

Place the switch in the drive posi­tion.

Lower the platform and drive to a
level surface.

Free-wheeling valve is open. Fully close the free-wheeling valve.

Low hydraulic system pressure. Stow the machine and do not oper-

ate until repairs are made.

Speed level set. Fully lower the aerial platform to

deactivate the speed level.

Can not reach maximum drive speed

Platform is elevated above 6′ (1.8 m).

Fully lower the platform.

of 3.1 mph (5.0 km/h).

Low speed drive range button is
selected.

Machine will not steer. Joystick interlock switch is not en-

gaged.

Wheels won’t turn when winching
or pushing.

Brake are engaged / free-wheeling
valve open.

Select the high speed drive range
button.

Engage the interlock switch before
operating the steer switch.

Release the brakes by closing the
free-wheeling valve (clockwise) and
pumping the break release hand
pump.

Brakes do not work. Brake cylinder rod is not extended /

free-wheeling valve closed.

Reset the brakes by opening the
free-wheeling valve (counterclock­wise).

Tilt alarm does not work. Platform is not raised more than 6′

(1.8 m).

Normal operation. The tilt alarm is
not active until the platform is raised
about 6′ (1.8 m).

Hydraulic fl uid temperature 200°F
(93°C) or more.

Severe hydraulic leak. Failure of hose, tube, fi tting, seal,

Prolonged machine operation or
driving.

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

etc.

Stop operation until fl uid cools.

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

Do not operate machine until repairs
are made.

SR3084SL – 8210037 49

Chapter 11 – Troubleshooting

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, 02 or 04 Upper or lower control function

From the upper controls make sure:

depressed during machine start up.

y

No selector buttons are de­pressed.

y

The interlock switch is not de­pressed.

y

The joystick is in neutral.

y

The steer switch is not de­pressed.

From the lower controls make sure:

No selector buttons are de-

y

pressed.

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.

03 Platform overload. From the platform:

Remove weight from the platform

y

until the load is at or below rated
capacity.

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.

05 Low oil pressure. Lower the platform and turn the

engine off. Do not restart the engine
until the cause of low oil pressure has
been corrected.

06 High coolant temperature. Lower the platform and turn the

engine off. Do not restart the engine
until the cause of high coolant tem­perature has been corrected.

50 SR3084SL – 8210037

Chapter 11 – Troubleshooting

Fault Code Possible Cause Corrective Action

07-45 Upper or lower control function de-

From the upper controls make sure:

pressed during machine start up.

y

No selector buttons are de­pressed.

y

The interlock switch is not de­pressed.

y

The joystick is in neutral.

y

The steer switch is not de­pressed.

From the lower controls make sure:

y

No selector buttons are de­pressed.

From the lower or upper controls:

y

Cycle machine power off then on
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.

Machine error. Stow the machine and do not oper-

ate until repairs are made.

51-73 Machine error. Stow the machine and do not oper-

ate until repairs are made.

68 Low battery voltage. Charge or replace the battery.

SR3084SL – 8210037 51

Chapter 11 – Troubleshooting

52 SR3084SL – 8210037

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, outriggers, stabilizers).

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.

elevating assembly – the assembly located between the chassis and the
platform which is used to raise and lower the platform.

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.

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.

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

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.

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 gurations.

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

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.

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.

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.

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.

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).

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

SR3084SL – 8210037

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 WARRANT:

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.