Snorkel S3970RT User manual

June 2017

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page - i
Electrical Hazard
 Electrical Hazard Warning
DANGER
S3970RT, S3370RT & S2770RT ELEVATING WORK PLATFORMS ARE NOT
ELECTRICALLY INSULATED.
If the platform, scissors arm assembly, or any other conductive part of the machine contacts a high-voltage electri-sembly, or any other conductive part of the machine contacts a high-voltage electri-bly, or any other conductive part of the machine contacts a high-voltage electri-
cal conductor, the result can be SERIOUS INJURY or DEATH for persons on or near the machine.
GO NO CLOSER THAN THE MINIMUM SAFE APPROACH DISTANCES
(M.S.A.D) - SEE BELOW.
Be sure to al low for sag and sway in the wires and the work platform.
If the machine comes in contact with a live electrical conductor, the entire machine can be charged.
If that happens, you should remain on the machine and not contact any other structure or object within reach. That
includes the ground, adjacent buildings, poles, and any object not a part of the machine.
Such con tact could make your body a conductor to the other object creating an electrical shock hazard resulting
in SERIOUS INJURY or DEATH.
DO NOT at tempt to enter or leave the machine until you are sure the electricity has been turned off.
If the machine is in con tact with a live conductor, the platform operator MUST warn others on the ground in the
vicinity of the machine to STAY AWAY from the machine, since their bodies can also form a path for electricity to
ground thus creating an electrical shock hazard with possible ELECTROCUTION and DEATH.
DO NOT attempt to operate the machine ground controls when the platform, scissors arm assembly, or any other
conducting part of the machine is in contact with electrical wires or if there is an immediate danger of such contact.
Regard all conductors as energised.
Personnel working on or near the machine must be continuously aware of electrical hazards, recognizing that
SERIOUS INJURY or DEATH can result if contact with an electrical wire does occur.
IMPORTANT - M.S.A.D.
It is the OPERATOR’S responsibilty to en sure M.S.A.D., (subject to local regulations and laws), are
known and adhered to.

page - ii Rev A S3970RT, S3370RT & S2770RT – 13865-1
Introduction
The most important chapter in this manual is the
safety chapter - Chapter 1. Take time, now, to
study it closely.
The information in Chapter 1, might save your life,
prevent serious injury, or damage to property or
the S3970RT / S3370RT / S2770RT
This introduction also contains important
information concerning the responsibilities of the
owner of the machine.
 Standard S3970RT / S3370RT /
S2770RT Version III
The standard S3970RT / S3370RT / S2770RT
includes the following features:
 Fully proportional one (1) handed joy stick
control
 Reliable diesel engine
 Large 1200mm multi position extension deck
 30% / 35% gradeability
 4 wheel drive
 Hour meter
 Temperature & ammeter gauges
 Easy access side trays for engine & hydraulics
 Lockable hinged covers
 Independently operated hydraulic stabilisers
with auto level
 Swinging gate
 Independent articulating rear axles
 Forklift pockets
 Lifting lugs and tie down rings
 Flashing light
 Options
The following options are available for the
S3970RT / S3370RT / S2770RT:
 No stabilisers
 Non-marking tyres
 110/240V power to platform
 RCD/ELCB Outlet
 Alternative power options
 Gasoline engine
 LPG engine
 Combination LPG/Gasoline engine
 Bi-Energy 24V DC / Diesel engine
 Operation Manual
This manual provides information for safe and
proper operation of the aerial platform. Read and
understand the information in this Operator’s
manual before operating this machine on a job site.
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.
 Photographs
Photographs are taken to represent the machine
and its component parts as clearly as possible.
However, there may be minor differences between
the photographs and your machine.This represents
individual customer preferences and Snorkel’s on-
going committment to product development.
 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, property damage
or damage to the machine.
The terms danger, warning, and caution indicate
varying degrees of personal injury or property
damage that can result if the instruction is not
followed.
A DANGER
Denotes an imminently hazardous situation
which, if not avoided, will result in death or
serious injury.
A WARNING
Denotes a potentially hazardous situation
which, if not avoided, could result in death
or serious injury.
A CAUTION
Denotes 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 or action which may result in
damage to the S3970RT / S3370RT / S2770RT.

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page - iii
Introduction
A IMPORTANT
Denotes important information pertaining
to settings, capacities, conditions, which
could, if ignored lead to machine damage or
future hazardous situations.
It is also used to alert the reader to pay
careful attention to a particular passage of
text in the manual.
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 S3970RT / S3370RT / S2770RT aerial platform
has built in safety features and has been factory
tested for compliance with Snorkel specifications
and industry standards. However, any personnel
lifting device can be potentially dangerous in the
hands of untrained or careless operators.
Training is vitally important and must be performed
under the direction of a QUALIFIED person. You
must display proficiency in knowledge and actual
operation of the machine before using it on a job
site.
Before operation of the machine vou must read
and understand the operating instructions in this
manual as well as the decals, warnings, and
instructions on the machine itself.
Before operating the machine you must be
authorised by the person in charge to do so and
the operation of the machine must be within the
scope of the machine specifications.
A WARNING
The potential for an accident increases when
the aerial platform is operated by personnel
who are not trained and authorised Death
or serious injury can result from such
accidents.
Read and understand the information in this
manual and on the placards and decals on
the machine before operating the machine
on the job site.
 Maintenance
Every person who maintains, inspects, tests,
or repairs these machines, and every person
supervising any of these functions, must be
properly trained and qualified to do so.
This Operators Manual provides a daily inspection
procedure that will help you keep your S3970RT /
S3370RT/S2770RT in good operating condition.
Do not perform other maintenance unless you
are a trained mechanic, qualified to work on the
S3970RT / S3370RT / S2770RT. Call qualified
maintenance personnel if you find problems or
malfunctions.
Do not modify this machine without written approval
from the Engineering Department of Snorkel.
Modification may void the warranty, adversely affect
stability, or affect the operational characteristics of
the S3970RT / S3370RT / S2770RT.
 Responsibilities of parties
It is imperative that all owners and users of the
S3970RT / S3370RT / S2770RT read, understand,
and conform to all applicable regulations.
Ultimate compliance to OSHA regulations is the
responsibility of the user and their employer.
A IMPORTANT
It is imperative that all owners and users
of the S3970RT / S3370RT / S2770RT read,
understand, and conform to all applicable
regulations.
Ultimate compliance to OSHA regulations is the
responsibility of the user and their employer.
A IMPORTANT
ANSI Standard A92.6 clearly identifies
requirements of all parties who might be
involved with Self-Propelled Elevating Work
Platforms.
AUSTRALIAN / NZ STANDARD 2550-10 also
identifies the requirements of all parties who
might be involved with Boom-Supported
Elevating Work Platforms.
Note - Standards
It is the responsibility of the owner to ensure that
the person operating the S3970RT / S3370RT /
S2770RT is provided with all the relevant
information relating to standards and codes of
practice applicable in their region.
 In summary
 Only trained and authorised operators should
be permitted to operate the equipment.
 All manufacturers operating instructions and
safety rules and all employers safety rules and
all OSHA and other government safety rules
should be strictly adhered to.

page - iv Rev A S3970RT, S3370RT & S2770RT – 13865-1
Introduction
 Repairs and adjustments should be made
only by qualified and trained maintenance
personnel.
 No modification should be made to the
equipment without prior written consent of the
Snorkel Engineering Department.
 Make a pre-start inspection of the S3970RT /
S3370RT / S2770RT at the beginning of each
shift. A malfunctioning machine must not be
used.
 Make an inspection of the work place to
locate possible hazards before operating the
S3970RT / S3370RT / S2770RT.
 Product Warranty
For full terms of your warranty policy refer to the
Repair Parts manual, or check with your Snorkel
distributor, or check the Snorkel website.
 Additional information
For additional information, contact your local dealer
or Snorkel at:
Snorkel New Zealand,
PO Box 1041
Levin 5510
New Zealand
Introduction

page - vi Rev A S3970RT, S3370RT & S2770RT – 13865-1
Electrical Hazard
Electrical Hazard Warning ....................................i
Introduction
Standard S3970RT / S3370RT /
S2770RT Version III.............................................ii
Options ................................................................ii
Operation Manual ................................................ii
Photographs ........................................................ii
Safety Alerts ........................................................ii
Operation............................................................ iii
Maintenance.......................................................iii
Responsibilities of parties................................... iii
Product Warranty................................................iv
Additional information .........................................iv
1. Safety
Safe Operation ................................................ 1-1
Electrocution Hazards ..................................... 1-1
Pre-start Inspection ......................................... 1-1
Work Place Inspection and Practices .............. 1-1
Operation......................................................... 1-2
Tipover and Falling Hazards............................ 1-2
General Safety Precautions............................. 1-3
Hydraulic System Precautions......................... 1-3
Fire / Explosion Prevention.............................. 1-3
Engine and Fuel Handling Precautions ........... 1-3
Batteries .......................................................... 1-4
Safety Placards and Decals Location.............. 1-4
2. Safety Devices
Safety Device Information................................ 2-1
Emergency Stop Switches............................... 2-1
At platform control box.................................. 2-1
At ground control box.................................... 2-1
Alarms ............................................................. 2-1
Lowering ....................................................... 2-1
High temperature .......................................... 2-2
Low oil pressure............................................ 2-2
Alternator not charging ................................. 2-2
Drive (reverse) .............................................. 2-2
Drive (forward) .............................................. 2-2
Load sensing system....................................... 2-2
Level sensor.................................................. 2-2
Primary Fall Restraint System ......................... 2-2
Safety Prop...................................................... 2-3
Swinging Gate ................................................. 2-3
Safety Control.................................................. 2-3
Bubble Level .................................................... 2-3
Operator Horn ................................................. 2-3
Stabilisers (Option).......................................... 2-4
Rough Terrain Scissor Interlock Tests.............. 2-4
Enable switch................................................ 2-4
RCD/ELCB AC Outlet (option)......................... 2-4
Flashing Light .................................................. 2-5
Fall Restraint Lanyard Anchor Points (option) . 2-5
3. Specications
Specifications .................................................. 3-1
General Specifications, Standard Machine
S3970RT ......................................................... 3-1
General Specifications, Standard Machine
S3370RT ......................................................... 3-2
General Specifications, Standard Machine
S2770RT ......................................................... 3-3
Engine Data..................................................... 3-4
DF752 (Option) ............................................. 3-4
D902 ............................................................ 3-4
Machine Component Identification .................. 3-5
4. Gauges
EzCal LCD Display .......................................... 4-1
Water ............................................................... 4-1
Alternator......................................................... 4-1
Oil Pressure..................................................... 4-1
Hours............................................................... 4-1
Work time...................................................... 4-1
Total time ...................................................... 4-1
Engine Oil........................................................ 4-1
Hydraulic Oil Level........................................... 4-1
Bubble Level ................................................. 4-2
5. Automatic Shut-offs and Circuit Breakers
Autiomatic Shut-offs ........................................ 5-1
Level sensor.................................................. 5-1
Engine temperature ...................................... 5-1
Engine oil pressure ....................................... 5-1
Platform height vs. drive speed..................... 5-1
Dynamic brakes ............................................ 5-1
Alternator not charging ................................. 5-1
Load sensing system .................................... 5-1
Stabilisers ..................................................... 5-2
Fuses............................................................... 5-2
RCD / ELCB outlet (option)........................... 5-2
6. Controls
Controls ........................................................... 6-1
Hydraulic Compartment................................... 6-1
Ground Control Box......................................... 6-1
Platform Control Box ....................................... 6-2
Table of Contents

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page - vii
Introduction
7. Daily Inspection and Maintenance
Daily Inspection and Maintenance Table ......... 7-1
Rough Terrain Scissor Interlock Tests.............. 7-2
Stabiliser locked out when platform
elevated test.................................................. 7-2
Elevation locked out when axles
not stowed test.............................................. 7-2
Elevation locked out when tilted test............. 7-2
Fuel Level ........................................................ 7-3
Fuel Filter (diesel engines only).................... 7-3
Fuel Leaks....................................................... 7-3
Engine Oil........................................................ 7-3
Engine Coolant................................................ 7-4
Radiator Cap ................................................... 7-4
Swinging Gate ................................................. 7-4
Wiring Harnesses and Connectors.................. 7-4
Battery Terminals............................................. 7-5
Battery Fluid Level ........................................ 7-5
Hydraulic Oil Tank............................................ 7-5
Hydraulic tank cap ........................................ 7-5
Hydraulic oil level.......................................... 7-5
Hydraulic Oil Leaks.......................................... 7-5
Tires and Wheels............................................. 7-6
Bolts and Fasteners......................................... 7-6
Structural Damage & Welds ............................ 7-6
Primary Fall Restraint System ......................... 7-7
Bubble Level .................................................... 7-7
Guides, rollers, and slides ............................... 7-7
Ground Controls .............................................. 7-7
Flashing Light .................................................. 7-8
Platform Controls............................................. 7-8
Emergency Lowering....................................... 7-8
RCD/ELCB (Option) ........................................ 7-9
Safety prop ...................................................... 7-9
Fall Restraint Lanyard Anchor Points
(Option)............................................................ 7-9
Non-Slip Tread Grip ......................................... 7-9
Wrist Support................................................... 7-9
Operator Manual............................................ 7-10
Placards and Decals...................................... 7-12
Stndard placards and decals ...................... 7-12
Inspection drawing...................................... 7-13
8. Operation
Operating Procedures ..................................... 8-1
Control Stations............................................... 8-1
Emergency Stopping ....................................... 8-1
Operation Considerations................................ 8-1
Operating From The Ground Control Box........ 8-2
Raising the platform......................................... 8-2
Operating From The Platform Control Box ...... 8-2
Driving ............................................................. 8-4
Variable Maximum Drive Speed.................... 8-4
Ramp Off ...................................................... 8-4
Raising the Platform ..................................... 8-5
Stabilisers........................................................ 8-5
Operating The Stabilisers Manually................. 8-6
To set the stabilisers ..................................... 8-6
To raise the stabilisers: ................................. 8-6
Operating The Auto Level System ................... 8-7
Setting the stabilisers automatically.............. 8-7
Raising the stabilisers automatically............. 8-7
The Risks of Operating Scissor Lifts
on Outriggers on Ramps and Slopes .............. 8-7
Extending The Multi-Position Platform............. 8-8
9. Emergency Operation
Emergency Operation Procedures .................. 9-1
Emergency Stop.............................................. 9-1
Emergency Bleed-Down.................................. 9-1
Pushing / Towing.............................................. 9-2
10. Stowing and Transporting
Stowing.......................................................... 10-1
To lock the machine: ................................... 10-1
Transporting................................................... 10-1
Trailering ..................................................... 10-1
Securing to a Transport Vehicle .................. 10-2
Towing......................................................... 10-3
Lifting .......................................................... 10-3
Pushing....................................................... 10-3
Winching Procedure ................................... 10-3
Long Term Storage ........................................ 10-3
11. Option
Bi-Energy Option ........................................... 11-1
DC motor .................................................... 11-1
DC motor operation .................................... 11-1
Master battery isolater switches ................. 11-1
Batteries...................................................... 11-1
Battery charger ........................................... 11-2
Batteries - General maintenance ................ 11-3
Batteries - Charging.................................... 11-3
Gasoline/LPG Fuel Option............................. 11-3
Fuel Level ................................................... 11-3
LPG Tank Gauges & Fuel Level.................. 11-3
Operating From the Ground Control Box....... 11-4
Operating From The Platform Control Box .... 11-5
RCD/ELCB Outlet.......................................... 11-6
Fall Restraint Lanyard Anchor Points (option)11-6
Electrical Outlet ............................................. 11-7
Non-Marking Tyres......................................... 11-7
Alternative Power Options ............................. 11-7
Stabilisers...................................................... 11-7

page - viii Rev A S3970RT, S3370RT & S2770RT – 13865-1
Introduction
12. Fire Fighting and Chemical Containment
Hazardous Components................................ 12-1
Antifreeze (UN 1993) .................................. 12-1
Battery, Lead/Acid (UN 2794) ..................... 12-1
Diesel Fuel (NA1993) ................................. 12-1
Foam In Tires.............................................. 12-2
Gasoline (UN 1203) .................................... 12-2
Hydraulic Oil (UN 1270).............................. 12-3
Liquefied Petroleum Gas (UN 1075)........... 12-3
Motor Oil (UN 1270).................................... 12-3
13. Operator's Troubleshootingt
Troubleshooting ............................................. 13-1
Operator Troubleshooting Chart.................. 13-1
Appendix A. Glossary

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page 1-1
 Safe Operation
Knowledge of the information in this manual, and
proper training, provide a basis for safely operating
the S3970RT / S3370RT / S2770RT. Know the
location of all the controls and how they operate to
act quickly and responsibly in an emergency.
Safety devices reduce the likelihood of an accident.
Never disable, modify, or ignore any safety device.
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 the operation
of the S3970RT / S3370RT / S2770RT and seek
assistance.
The operator bears ultimate responsibility for
following all manufacturers instructions and
warnings, regulations and safety rules of their
employer and/or any country or regional law.
 Electrocution Hazards
The S3970RT/ S3370RT/ S2770RT is an all metal
aerial work platform and is not electrically insulated.
Do not operate it near electrical conductors. Regard
all conductors as being energised. Do not operate
outside during a thunderstorm.
 Pre-start Inspection
At the start of each work shift, the S3970RT /
S3370RT / S2770RT shall be given a visual
inspection and function test. See the Daily
Inspection and Maintenance chapter, in this manual
for a list of items to inspect and test.
A WARNING
DO NOT operate the S3970RT / S3370RT /
S2770RT unless you are trained and
authorised, understand the operation
characteristics of the S3970RT / S3370RT /
S2770RT, and have inspected and tested
all functions to be sure they are in proper
working order.
 Work Place Inspection and Practices
Do not use the S3970RT / S3370RT / S2770RT
as a ground for welding. Ground to the work piece.
Before the S3970RT / S3370RT / S2770RT is
used, and during use, check the area in which the
S3970RT / S3370RT / S2770RT is to be used for
possible hazards such as, but not limited to:
 Drop-offs or holes.
 Side slopes.
 Bumps and floor obstructions.
 Debris.
 Overhead obstructions and electrical
conductors.
 Hazardous locations.
 Inadequate surface and support to withstand
all load forces imposed by the aerial platform
in all operating configurations.
 Wind and weather conditions.
 Presence of unauthorised persons.
 Other possible unsafe conditions.
Before the S3970RT / S3370RT / S2770RT is
used, determine the hazard classification of any
particular atmosphere or location according to
ANSI/NFPA 505-1987.
Any S3970RT/ S3370RT/ S2770RT operated in a
hazardous location must be approved and of the
type required by ANSI/NFPA 505-1987.
While operating the S3970RT / S3370RT / S2770RT
a recommended safety practice is to have trained
and qualified personnel in the immediate work area
of the S3970RT / S3370RT / S2770RT to:
 Help in case of an emergency.
 Operate emergency controls as required.
 Watch for loss of control by platform operator.
 Warn the operator of any obstructions or
hazards that may not be obvious to them.
 Watch for soft terrain, sloping surfaces, drop-
offs, etc., where stability could be jeopardized.
 Watch for bystanders and never allow anyone
to be under, or to reach through the booms
while operating the aerial platform.
A DANGER
Pinch points may exist between moving
components. Death or serious injury can
result from becoming trapped between
components, buildings, structures, or other
obstacles. Make sure there is sufficient
clearance around the machine before
moving the chassis, booms, or platform.
Allow sufficient room and time to stop
movement to avoid contact with structures
or other hazards.
Keep ground personnel from under the platform
when the platform is raised.
Secure all accessories, containers, tools, and other
materials in the platform to prevent them from
accidentally falling or being kicked off the platform.
Always look in the direction of travel. Drive with
care and at speeds compatible with the work-place
conditions. Use caution when driving over rough
ground, on slopes, and when turning.
1. Safety

page 1-2 Rev A S3970RT, S3370RT & S2770RT – 13865-1
1. Safety
Do not engage in any form of horseplay or stunt
driving while operating the S3970RT / S3370RT /
S2770RT.
Do not permit riders on the machine anyplace other
than on the platform.
Remove all loose objects stored in or on the
machine, particularly in the platform. Remove all
objects which do not belong in or on the machine.
Never steady the platform by positioning it against
another platform.
Do not operate an S3970RT / S3370RT / S2770RT
that is damaged or not functioning properly. Do
not use the S3970RT / S3370RT / S2770RT until
the machine has been repaired by a qualified
maintenance person.
Do not operate a S3970RT / S3370RT / S2770RT
that does not have all its decals and placards
attached and legible.
Watch for bystanders and never allow anyone to
be under, or to reach through, the machine and its
equipment while operating.
Use the recommended transport device when
loading the machine.
 Operation
ENSURE that you wear appropriate PPE while
using the machine. The required PPE will vary
depending on the specific job. A risk and hazard
analysis must be performed by the operator to
understand what PPE will be required.
DO NOT operate the S3970RT / S3370RT /
S2770RT if you feel tired, sick, or if you are under
the influence of alcohol, prescription or illicit drugs.
If you encounter any suspected malfunction of the
aerial platform, or any hazard or potentially unsafe
condition relating to capacity, intended use, or safe
operation, cease operation immediately and seek
assistance from management.
Use three (3) points of support when getting on or
off the platform (two (2) hands and one (1) foot or a
similar set of points). Keep the platform clean.
Maintain a firm footing on the platform floor.Operate
the controls slowly and deliberately to avoid jerky
and erratic operation. Always stop the controls in
neutral before going in the opposite direction.
Do not dismount while the platform is in motion or
jump off the machine.
Do not start until all personnel are clearly away
from the machine.
Never cover the floor grating or otherwise obstruct
your view below. Make sure the area below the
platform is free of personnel before lowering.
Access and egress from the platform is to be
attempted ONLY when the platform is fully lowered.
DO NOT overload the platform by lifting additional
equipment from an elevated platform.
The S3970RT / S3370RT / S2770RT is not
intended for on-road use.The S3970RT/ S3370RT/
S2770RT may be used on the road if applicable
control measures are in place and local regulations
are adhered to.
Operator’s of the S3970RT / S3370RT / S2770RT
MUST NOT push or pull objects with the platform.
 Tipover and Falling Hazards
Operate the S3970RT / S3370RT / S2770RT only
on a firm, flat, level surface capable of withstanding
all load forces imposed by the S3970RT/ S3370RT /
S2770RT in all operating conditions.
A DANGER
The S3970RT / S3370RT / S2770RT can tip
over if it becomes unstable. Death or serious
injury can result from a tip-over accident. Do
not drive or position the S3970RT/S3370RT/
S2770RT platform for elevated use near any
drop-off, hole, slope, soft or uneven ground,
or other tip-over hazard.
Do not operate the S3970RT / S3370RT / S2770RT
from a position on trucks, trailers, railway cars,
floating vessels, scaffolds, or similar equipment
unless the application is approved in writing by
Snorkel.
Care shall be taken to prevent rope, electric cords,
and hoses, etc., from becoming entangled in the
aerial platform. If the platform or elevating assembly
becomes caught, snagged, or otherwise prevented
from normal motion by an adjacent structure or
other obstacle such that control reversal does
not free the platform, remove all personnel from
the platform before attempts are made to free the
platform using ground controls.

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page 1-3
1. Safety
No person shall access or egress from the platform
in the elevated position (except in an emergency)
unless the requirements of AS2550.10 have been
met.
For full requirements refer directly to AS2550.10
Do not exceed the unrestricted platform capacity
as indicated on the capacity placard at the entrance
to the platform. Do not carry loads from any point
outside of the platform.
Make sure that all protective guards, cowlings, and
doors are in place and secure. Be sure the guardrail
system, including the gate, is in place and secure.
Do not climb on the guardrails or use ladders,
planks, or other devices to extend or increase your
work position from the platform.
Do not use the S3970RT / S3370RT / S2770RT
as a crane, hoist, or jack,or for any other purpose
other than to position personnel, their tools, and
materials.
Do not operate the S3970RT / S3370RT / S2770RT
in winds, or wind gusts, of 28 mph, 45kph 12.5 m/s)
or more.
A DANGER
Do not add banners, flags, screens or
shelters etc., to areas of the S3970RT /
S3370RT/ S2770RT that are exposed to wind
forces as this will increase the wind loading
and effect stability.
 General Safety Precautions
Do not modify the S3970RT / S3370RT / S2770RT
in any way.
When parts or components are replaced, they shall
be identical or equivalent to original Snorkel parts
or components.
Do not override any of the safety features of the
S3970RT / S3370RT / S2770RT.
Ensure that the machine is secure from any
unauthorised use.
 Hydraulic System Precautions
The hydraulic system contains hoses with hydraulic
fluid under pressure.
A DANGER
Hydraulic fluid escaping under pressure can
have enough force to inject fluid into the
flesh. Serious infection or reaction can result
if medical treatment is not given immediately.
In case of injury by escaping hydraulic fluid,
seek medical attention at once.
DO NOT place your hand or any part of your body
in front of escaping hydraulic fluid. Use a piece of
cardboard or wood to search for hydraulic leaks.
Do not attempt repairs to hydraulic systems unless
you are trained. Refer to experienced repair
personnel for help.
 Fire / Explosion Prevention
Never operate your S3970RT / S3370RT / S2770RT
near a flame or spark. Hydraulic oil and gasoline
are flammable and can explode.
DO NOT operate the S3970RT / S3370RT /
S2770RT in an explosive environment unless the
machine is suitably modified by an authorised
agent of the manufacturer.
DO NOT carry fuel or other flammable or explosive
or toxic substances in the platform unless a risk
and hazard analysis shows that it is safe to do so
and that applicable control measures are in place
e.g. carry only the minimum amount required and
in approved containers etc.
 Engine and Fuel Handling Precautions
A DANGER
Engine exhaust contains carbon monoxide,
a poisonous gas that is invisible and
odorless. Breathing engine exhaust fumes
can cause death or serious illness. Do not
run the engine in an enclosed area or indoors
without adequate ventilation.
Only refuel your S3970RT / S3370RT / S2770RT
outdoors in a clear area void of gas fumes or spilled
gas. Never remove the fuel cap or refuel a gasoline
engine while the engine is running or hot. ALWAYS
allow the engine to cool before refueling. Never
allow fuel to spill on hot machine components.
A CAUTION
DO NOT smoke or permit open flames while
fueling or near fueling operations.
Maintain control of the fuel ller nozzle when lling
the tank.
A WARNING
ENSURE you use an approved fuel container
with appropriate fuel filler nozzle
Do not fill the fuel tank to capacity. Allow room for
expansion.

page 1-4 Rev A S3970RT, S3370RT & S2770RT – 13865-1
1. Safety
If gasoline is spilled, clean up spilled fuel
immediately, push/tow the S3970RT / S3370RT /
S2770RT away from the area of the spill and avoid
creating any source of ignition until the spilled fuel
has evaporated.
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.
 Batteries
Charge batteries in a well ventilated area free of
flame, sparks, or other hazards that might cause
fire or explosion.
A WARNING
Batteries give off hydrogen and oxygen that
can combine explosively. Death or serious
injury can result from a chemical explosion.
Do not smoke or permit open flames or
sparks when checking batteries.
Battery acid can damage the skin and eyes.
Serious infection or reaction can result if
medical treatment is not given immediately.
Wear face and eye protection when working
near batteries.
Batteries contain sulfuric acid that can damage
your eyes or skin on contact. Wear a face shield,
rubber gloves, and protective clothing when
working around batteries. If acid contacts your
eyes, flush immediately with clear water and get
medical attention. If acid contacts your skin, wash
off immediately with clear water.
 Safety Decals and Placards
There are several safety decals and placards on
the S3970RT / S3370RT / S2770RT.Their locations
and descriptions are shown in this section. Take
time to study them.
A CAUTION
Be sure that all the safety decals and placards
on the S3970RT / S3370RT / S2770RT are
legible. Clean or replace them if you cannot
read the words or see the pictures. Clean
with soap & water and a soft cloth. Do not
use solvents.
You MUST replace a decal or placard if it is
damaged, missing, or cannot be read. If it is
on a part that is replaced, make sure a new
decal or placard is installed on the replaced
part. See your Snorkel dealer for new decals
and placards.
Note:
From time-to-time certain Snorkel decals may be
deleted, altered or replaced, or new decals may
be added in line with new safety regulations or
machine specification changes.
If you are unsure or want to check a particular
decal or its placement on the machine contact your
nearest Snorkel dealer or the snorkel website.
 Safety Placards and Decals Location

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page 1-5
1. Safety

page 1-6 Rev A S3970RT, S3370RT & S2770RT – 13865-1
1. Safety

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page 1-7
1. Safety

page 1-8 Rev A S3970RT, S3370RT & S2770RT – 13865-1
1. Safety

S3970RT, S3370RT & S2770RT – 13865-1 Rev A page 2-1
 Safety Device Information
For emergency operation controls and procedures
see the Emergency Operation chapter 9, in this
manual.
The devices listed in this chapter are safety devices.
They are on the machine to increase safety in the
work place for both the operator and other people
near the machine.
A WARNING
Do not by-pass, disable, modify, or ignore
any of these devices. Check them carefully
at the start of each work shift to see that they
are in working order (see Daily Inspection &
Maintenance chapter 7). If any is found to be
defective, remove the S3970RT / S3370RT /
S2770RT from service immediately until
a qualified service technician can make
repairs.
 Emergency Stop Switches
 At platform control box
Figure 2.1 - Platform Control Box Emergency
Stop Switch
Press the large red EMERGENCY STOP button in
and the entire machine stops, the engine turns off,
and nothing moves. This switch must be out (on) to
control the S3970RT / S3370RT / S2770RT from
the platform (pull the switch and it will pop out).
Note
In order for the Emergency Stop switch at the
Platform to have an effect the Platform/Ground Key
selector switch (on the lower control box) must be
set on platform.
 At ground control box
Figure 2.2 - Ground Control Box Emergency
Stop Switch
Press the large red EMERGENCY STOP button
in and the entire machine stops, the engine
turns off, and nothing moves, the EMERGENCY
STOP switch must be out (on) for anything on the
S3970RT / S3370RT / S2770RT to work (pull the
switch and it will pop out).
 Alarms
When an alarm occurs the buzzer in the lower
control box will sound. The upper alarm will only
sound if the upper controls are selected and active.
The different alarm sound patterns are shown in
the table immediately below.
Figure 2.3 - Alarm Sound Patterns
 Lowering
The lowering alarm warns people near the machine
that the platform is coming down and the scissor
arm assembly is closing.
2. Safety Devices

page 2-2 Rev A S3970RT, S3370RT & S2770RT – 13865-1
2. Safety Devices
Note:
When the alarm sounds for either High
Temperature, Low Oil Pressure, or Alternator not
Charging the engine will automatically shutdown
after 20 seconds.
 High temperature
The high-temperature alarm warns you that the
engine is overheating. (See Automatic Shut-Offs &
Circuit Breakers chapter 5 for more information.)
 Low oil pressure
The low pressure alarm warns you that the engine
oil pressure is near the lower limit for safe operation
of the engine. (See Automatic Shut-Offs & Circuit
Breakers chapter 5 for more information.)
 Alternator not charging
This alarm warns you that the alternator is not
charging the battery. (See Automatic Shut-Offs &
Circuit Breakers chapter 5 for more information.)
 Drive (reverse)
The DRIVE (reverse) alarm alerts people that
the S3970RT/ S3370RT/ S2770RT is traveling
backward along the ground. This alarm beeps
twice as fast as the DRIVE (forward) alarm.
 Drive (forward)
The DRIVE (forward) alarm alerts people that
the S3970RT / S3370RT / S2770RT is traveling
forward along the ground. This alarm beeps half as
fast as the DRIVE (reverse) alarm.
 Load sensing system
As soon as the scissor stack rises from it’s stowed
position the overload protection system becomes
active.
 If 90% of rated capacity is reached in the
platform the overload light will illuminate.
This is a warning to the operator that the platform
is reaching rated capacity.
Normal function will remain and the machine can
continue to be used
 If 100% of rated capacity is reached in the
platform the overload light will continue to
be illuminated and an alarm will sound.
This is a warning to the operator that rated capacity
has been reached and the platform load must be
reduced.
Normal function will remain to allow the platform
to be positioned to remove some load from the
platform.
Note:
The machine should not be operated continuously
with the overload alarm sounding.
 If 110% of rated capacity is reached in the
platform the overload light will continue to
be illuminated and an alarm will continue to
sound and all functions will be disabled.
The operator must remove load from the platform.
Normal function will resume once the platform load
has been reduced below 110% continuously for at
least two (2) seconds.
Figure 2.4 - Platform Overload Light
 Level sensor
The level sensor alarm warns the S3970RT /
S3370RT / S2770RT operator that the S3970RT /
S3370RT / S2770RT is not level. When you
hear this alarm, immediately lower the platform
completely down. When the platform is completely
down, determine and correct the cause of the tilt
before raising the platform again.
NOTE
While the alarm is sounding it is not possible to
drive the S3970RT / S3370RT / S2770RT nor raise
the platform
 Primary Fall Restraint System
Figure 2.5 - Fall Restraint
The handrails, including mid-rail and toe-board
combined with the gate, form a Fall Restraint
System. The System prevents the operator from