Skyjack SJ 3219 User manual

Operating Manual
Compact & Conventional Series (CE)
MODELS SJ 3215 SJ 3219 SJ 3220 SJ 3226 SJ 4620 SJ 4626 SJ 4632
155150AB-A September 2010

Skyjack Service Center 3451 Swenson Ave. St. Charles, Illinois, 60174 USA
Phone: [phone]
Toll Free: 1-800-275-9522
Fax: [phone]
Email: [email protected]om
Parts (North America)
Toll Free: 1-800-965-4626
Toll Free Fax: [phone]
Email: [email protected]
Parts & Service (Europe) Unit 1 Maes Y Clawdd, Maesbury Road Industrial Estate
Oswestry, Shropshire SY10 8NN UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Skyjack Asia Pacific
Singapore
Phone: [phone]
Fax: [phone]
Email: [email protected]
NOTE
If your machine’s serial number is not listed above, please refer to www.skyjack.com for
a complete list of older machine models/operating manuals.
143856AC 143881AD 155150AB
February 2008 October 2009 September 2010
3215 10 000 001 to 10 000 329 10 000 330 to 10 000 573 10 000 574 & Above
3219 22 000 001 to 22 013 837 22 013 838 to 22 019 596 22 019 597 & Above
3220 60 000 001 to 60 001 522 60 001 523 to 60 002 031 60 002 032 & Above
4620
4626
4632
145AB
27 005 501 & Above27 000 001 to 27 004 499
70 000 001 to 70 004 719
USE THE SERIAL NUMBER OF YOUR MACHINE TO DETERMINE THE CORRECT OPERATING MANUAL TO USE
70 004 720 to 70 006 052
27 004 500 to 27 005 500
Manual Part #
70 006 053 & Above
Release Date
M
O
D
E
L
3226

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December 2007 Page 3
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DANGER
DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
CAUTION 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.
IMPORTANT
IMPORTANT indicates a procedure essential for safe operation and which,
if not followed, may result in a malfunction or damage to the aerial platform.
The Safety Alert Symbol identifies important
safety messages on aerial platform, safety signs
in manuals or elsewhere. When you see this
symbol, be alert to the possibility of personal
injury or death. Follow the instructions in the
safety message.
This Safety Alert Symbol means attention!
Become alert! Your safety is involved.

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Page 4 December 2007
SJIII Compacts & Conventionals
Table of Contents
Section 1 - About Your Aerial Platform
Read and Heed
Aerial Platform Definition .............................................................................................................................................7
Purpose of Equipment .................................................................................................................................................7
Use of Equipment ........................................................................................................................................................7
Manual..........................................................................................................................................................................7
Operator .......................................................................................................................................................................7
Service Policy and Warranty........................................................................................................................................7
Optional Accessories ...................................................................................................................................................7
Scope of this Manual ...................................................................................................................................................7
Safety Rules
Operator Safety Reminders .........................................................................................................................................8
Electrocution Hazard ...................................................................................................................................................8
Safety Precautions .......................................................................................................................................................9
Section 2 - Operation
2.1 General ............................................................................................................................................................13
2.1-1 Operator Qualifications .....................................................................................................................13
2.1-2 Operator’s Responsibility for Maintenance ......................................................................................13
2.1-3 Maintenance and Inspection Schedule ............................................................................................13
2.1-4 Owner’s Inspections .........................................................................................................................13
2.2 Major Components .........................................................................................................................................14
2.3 Major Assemblies ...........................................................................................................................................15
2.3-1 Base .................................................................................................................................................15
2.3-2 Lifting Mechanism.............................................................................................................................15
2.3-3 Platform .............................................................................................................................................15
2.4 Serial Number Nameplate ..............................................................................................................................15
2.5 Component Identification ...............................................................................................................................16
2.5-1 Main Power Disconnect Switch .......................................................................................................16
2.5-2 Tilt Alarm ...........................................................................................................................................16
2.5-3 Load Sensing System.......................................................................................................................16
2.5-4 Base Control Console.......................................................................................................................17
2.5-5 Electrical Panel..................................................................................................................................17
2.5-6 Brake System....................................................................................................................................17
2.5-7 Free-wheeling Valve..........................................................................................................................18
2.5-8 Battery Charger.................................................................................................................................18
2.5-9 Pothole Protection Device.................................................................................................................18
2.5-10 Emergency Lowering System...........................................................................................................19
2.5-11 Lowering Warning System................................................................................................................19
2.5-12 Maintenance Support .......................................................................................................................19
2.5-13 Platform Control Console .................................................................................................................20
2.5-14 Manual Storage Box .........................................................................................................................20
2.5-15 Folding Guardrail System .................................................................................................................20
2.5-16 Lanyard Attachment Anchorage.......................................................................................................21

SJIII Compacts & Conventionals
December 2007 Page 5
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Table of Contents
Section 2 - Operation (Continued)
2.6 Component Identification (Special Options)...................................................................................................22
2.6-1 Powered Extension Control Console (If Equipped) ........................................................................22
2.6-2 1500W AC Inverter (If Equipped)......................................................................................................22
2.6-3 Motion Alarm (If Equipped)...............................................................................................................22
2.7 Operator’ Responsibility..................................................................................................................................23
2.8 Visual and Daily Maintenance Inspections .....................................................................................................24
2.9 Function Tests..................................................................................................................................................31
2.10 Start Operation ................................................................................................................................................38
2.10-1 To Activate Base Control Console ....................................................................................................38
2.10-2 To Raise or Lower Platform Using Base Control Console................................................................38
2.10-3 To Activate Platform Control Console...............................................................................................39
2.10-4 To Raise or Lower Platform Using Platform Control Console ..........................................................39
2.10-5 To Drive Forward or Backward .........................................................................................................40
2.10-6 To Steer .............................................................................................................................................40
2.10-7 To Select Level Drive or Inclined Drive Mode ...................................................................................41
2.10-8 To Extend/Retract Manual Extension Platform .................................................................................41
2.10-9 To Extend/Retract Powered Extension Platform (If Equipped).........................................................42
2.10-10 Electrical Inverter (If Equipped) ........................................................................................................42
2.10-11 Shutdown Procedure ........................................................................................................................42
2.11 Guardrail Folding Procedure...........................................................................................................................43
2.12 Loading/Unloading..........................................................................................................................................44
2.12-1 Lifting.................................................................................................................................................44
2.12-2 Driving ...............................................................................................................................................45
2.13 Moving the Aerial Platform Through a Doorway.............................................................................................46
2.14 Winching and Towing Procedures ..................................................................................................................48
2.14-1 To Release Free-wheeling Valve .......................................................................................................48
2.14-2 To Release Brakes Manually.............................................................................................................49
2.15 Emergency Lowering Procedure ....................................................................................................................50
2.16 Maintenance Support Procedure....................................................................................................................51
2.17 Battery Maintenance .......................................................................................................................................52
2.17-1 Battery Service Procedures ..............................................................................................................52
2.17-2 Battery Charging Operation..............................................................................................................52
2.18 Tables...............................................................................................................................................................56
2.19 Labels ..............................................................................................................................................................66
List of Tables
Table 2.1 Standard and Optional Features .............................................................................................................56
Table 2.2 Owner’s Annual Inspection Record .........................................................................................................57
Table 2.3 Specifications and Features.....................................................................................................................58
Table 2.4 Floor Loading Pressure............................................................................................................................60
Table 2.5 Maximum Platform Capacities (Evenly Distributed) ................................................................................62
Table 2.6 EC Declaration of Conformity .................................................................................................................63
Table 2.7 Maintenance and Inspection Schedule ...................................................................................................64
Table 2.8 Operator’s Checklist ................................................................................................................................65

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December 2007 Page 7
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Section 1 - About Your Aerial Platform Read and Heed
SKYJACK is continuously improving and expanding product features on its equipment, therefore, specifications and
dimensions are subject to change without notice.
Aerial Platform and Mobile Elevating Work Platform Definition
A mobile device that has a positionable platform supported from ground level by a structure.
Purpose of Equipment
The SKYJACK SJIII Compact and Conventional series aerial platforms are designed to transport and raise personnel,
tools and materials to overhead work areas.
Use of Equipment
The aerial platform is a highly maneuverable, mobile work station. Lifting and driving must be on a flat, level,
compacted surface.
Manual
The operating manual is considered a fundamental part of the aerial platform. It is a very important way to communicate
necessary safety information to users and operators. A complete and legible copy of this manual must be kept in
the provided weather-resistant storage compartment on the aerial platform at all times.
Operator
The operator must read and completely understand both this operating manual and the safety panel label located on
the platform and all other warnings in this manual and on the aerial platform. Compare the labels on the aerial platform
with the labels found within this manual. If any labels are damaged or missing, replace them immediately.
Service Policy and Warranty
SKYJACK warrants each new SJIII Series work platform to be free of defective parts and workmanship for the first
24 months. Any defective part will be replaced or repaired by your local SKYJACK dealer at no charge for parts or
labor. Contact the SKYJACK Service Department for warranty statement extensions or exclusions.
Optional Accessories
The SKYJACK aerial platform is designed to accept a variety of optional accessories. These are listed under “Standard
and Optional Features” in Table 2.1.
Operating instructions for these options (if equipped) are located in Section 2 of this manual.
For options not listed under “Standard and Optional Features,” contact the SKYJACK Service Department at
(: 44-1691-676-235
7: 44-1691-676-238
Include the model and serial number for each applicable aerial platform.
Scope of this Manual
a. This manual applies to the CE version of the SJIII Series aerial platform models listed on Table 2.1.
Equipment identified with “CE” meets the requirements for the European countries, i.e., Machinery Directive
2006/42/EC and Directive 2004/108/EC and the corresponding EN standards.
b. Operators are required to conform to national, state or territorial/provincial and local health and safety regulations
applicable to the operation of this aerial platform.
1

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Page 8 December 2007
SJIII Compacts & Conventionals
Safety Rules Section 1 - About Your Aerial Platform
WARNING
Failure to comply with your required responsibilities in the use and operation of the aerial platform
could result in death or serious injury!
Operator Safety Reminders
A study conducted by St. Paul Travelers showed that most accidents are caused by the failure of the operator to
follow simple and fundamental safety rules and precautions.
You, as a careful operator, are the best insurance against an accident. Therefore, proper usage of this aerial
platform is mandatory. The following pages of this manual should be read and understood completely before
operating the aerial platform.
Common sense dictates the use of protective clothing when working on or near machinery. Use appropriate safety
devices to protect your eyes, ears, hands, feet and body.
Any modifications from the original design are strictly forbidden without written permission from SKYJACK.
Electrocution Hazard
This aerial platform is not electrically insulated. Maintain a Minimum Safe Approach Distance (MSAD) from
energized power lines and parts as listed below. The operator must allow for the platform to sway, rock or sag.
This aerial platform does not provide protection from contact with or proximity to an electrically charged
conductor.
DO NOT USE THE AERIAL PLATFORM AS A GROUND FOR WELDING.
DO NOT OPERATE THE AERIAL PLATFORM DURING LIGHTNING OR STORMS.
60023AE-CE
DANGER
Adhere strictly to the governmental rulings and regulations applicable in your country.
FAILURE TO AVOID THIS HAZARD WILL RESULT IN DEATH OR SERIOUS INJURY!
Avoid Power Lines
Minimum Safe Approach Distance
CE Guidance Note
“Avoidance of danger from overhead lines”

SJIII Compacts & Conventionals
December 2007 Page 9
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Section 1 - About Your Aerial Platform Safety Rules
Safety Precautions
Know and understand the safety precautions before going on to next section.
WARNING
Failure to heed the following safety
precautions could result in tip over,
falling, crushing, or other hazards leading
to death or serious injury.
• KNOW all national, state or territorial/provincial
and local rules which apply to your aerial platform
and jobsite.
• TURNmainpowerdisconnectswitch “ ”offwhen
leaving the aerial platform unattended. Remove
the key to prevent unauthorized use of the aerial
platform.
• WEAR all the protective clothing and personal
safety devices issued to you or called for by job
conditions.
• DO NOT wear loose clothing,
dangling neckties, scarves,
rings, wristwatches or other
jewelry while operating this
lift.
• AVOID entanglement with
ropes, cords or hoses.
• AVOID falling. Stay within the
boundaries of the guardrails.
• DO NOT raise the aerial
platform in windy or gusty
conditions.
• DO NOT increase the lateral
surface area of the platform.
Increasing the area exposed
to the wind will decrease aerial
platform stability.
• DO NOT drive or elevate the
aerial platform if it is not on a
firm level surface. Do not drive
elevated near depressions
or holes of any type, loading
docks, debris, drop-offs and
surfaces that may affect the
stability of the aerial platform.
• If operation in areas
with holes or drop-offs
is absolutely necessary,
elevated driving shall not be
allowed. Position the aerial
platform horizontally only with
the platform fully lowered. After
ensuring that all 4 wheels or
outriggers (if equipped) have
contact with level firm surface,
the aerial platform can be
elevated. After elevation, the
drive function must not be
activated.
• Elevated driving must
only be done on a firm level
surface.
• DO NOT ascend or descend
a grade when elevated.
When fully lowered, ascend
or descend grades up to
maximum rated inclines listed
in Table 2-3a and Table 2-3b.




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Page 10 December 2007
SJIII Compacts & Conventionals
Safety Rules Section 1 - About Your Aerial Platform
Safety Precautions (Continued)
Know and understand the safety precautions before going on to next section.
• DO NOT operate on surfaces not capable of
holding the weight of the aerial platform including
the rated load, e.g. covers, drains, and trenches.
• DO NOT operate an aerial
platform that has ladders,
scaffolding or other devices
mounted on it to increase its size
or work height. It is prohibited.
• DO NOT exert side forces on
aerial platform while elevated.
• DO NOT use the aerial platform
as a crane. It is prohibited.
• DO NOT sit, stand or climb on
the guardrails. It is prohibited.
• DO NOT climb on scissor arm
assembly. It is prohibited.
• BE AWARE of overhead
obstructions or other possible
hazards around the aerial
platform when driving or lifting.
• DONOT raisethe aerialplatform
while the aerial platform is on a
truck, fork lift or other device or
vehicle.
• BE AWARE of crushing
hazards. Keep all body parts
inside platform guardrail.
• DO NOT lower the platform
unless the area below is
clear of personnel and
obstructions.
• ENSURE that there are no personnel or
obstructions in the path of travel, including blind
spots.
• BE AWARE of blind spots when operating the
aerial platform.
• STUNT driving and horseplay are prohibited.
• ENSURE ALL tires are in good condition and lug
nuts are properly tightened.
• DO NOT alter or disable limit switches or other
safety devices.
• DO NOT use the aerial platform without guardrails,
locking pins and the entry gate in place.

SJIII Compacts & Conventionals
December 2007 Page 11
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Section 1 - About Your Aerial Platform Safety Rules
Safety Precautions (Continued)
Know and understand the safety precautions before going on to next section.
• DO NOT exceed the rated capacity of the
aerial platform. Do make sure the load is evenly
distributed on the platform.
• DO NOT attempt to free a snagged platform with
lower controls until personnel are removed from
the platform.
• DO NOT position the aerial platform against
another object to steady the platform.
• DO NOT place materials on the guardrails
or materials that exceed the confines of the
guardrails unless approved by Skyjack.
WARNING
Entering and exiting the aerial platform
should only be done using the three
points of contact.
• Useonlyequippedaccessopenings.
• Enter and exit only when the aerial
platform is in the fully retracted position.
•Do use three points of contact to enter and exit
the platform. Enter and exit the platform from
the ground only. Face the aerial platform when
entering or exiting the platform.
•Three points of contact means that two hands
and one foot or one hand and two feet are in
contact with the aerial platform or the ground at
all times during entering and exiting.
WARNING
An operator should not use any aerial
platform that:
does not appear to be working properly.•
has been damaged or appears to have worn or•
missing parts.
has alterations or modifications not approved by•
the manufacturer.
has safety devices which have been altered or•
disabled.
has been tagged or locked out for non-use or•
repair.
Failure to avoid these hazards could
result in death or serious injury.
Jobsite Inspection
Do not use in hazardous locations.•
Perform a thorough jobsite inspection prior to•
operating the aerial platform, to identify potential
hazards in your work area.
Be aware of moving equipment in the area. Take•
appropriate actions to avoid collision.

SJIII Compacts & Conventionals
December 2007 Page 13
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Section 2 - Operation General
2
2.0 Operation
This section provides the necessary information needed
to operate the aerial platform. It is important that the user
reads and understands this section before operating
the aerial platform.
2.1 General
In order for this aerial platform to be in good working
condition, it is important that the operator meets the
necessary qualifications and follow the maintenance
and inspection schedule referred to in this section.
2.1-1 Operator Qualifications
Only trained and authorized personnel shall• be
permitted to operate an aerial platform.
Safe use of this aerial platform requires the•
operator to understand the limitations and
warnings, operating procedures and operator’s
responsibility for maintenance. Accordingly, the
operator must understand and be familiar with this
operating manual, its warnings and instructions,
and all warnings and instructions on the aerial
platform.
The operator must be familiar with employer’s work•
rules and related government regulations and be
able to demonstrate the ability to understand and
operate this make and model of aerial platform in
the presence of a qualified person.
2.1-2 Operator’s Responsibility for
Maintenance
WARNING
Maintenance must be performed by
trained and competent personnel who are
familiar with mechanical procedures.
Death or serious injury could result from
the use of an aerial platform that is not
properly maintained or kept in good
working condition.
The operator must be sure that the aerial platform•
has been properly maintained and inspected
before using it.
The operator must perform all the daily inspections•
and function tests found in Table 2.7, even if
the operator is not directly responsible for the
maintenance of this aerial platform.
2.1-3 Maintenance and Inspection Schedule
The inspection points covered in• Table 2.7 indicate
the areas of the aerial platform to be maintained or
inspected and at what intervals the maintenance
and inspections are to be performed.
The actual operating environment of the aerial•
platform may affect the maintenance schedule.
WARNING
Use original or manufacturer-approved
parts and components for the aerial
platform.
2.1-4 Owner’s Inspections
It is the responsibility of the owner to arrange daily,
quarterly (or 150 hours) and annual inspections of the
aerial platform. Refer to Table 2.7 for recommended
maintenance and inspection areas and intervals. A
record of annual inspection is kept on a label located
on the scissor assembly. Refer to Table 2.2 in this
manual.

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Page 14 December 2007
SJIII Compacts & Conventionals
Major Components Section 2 - Operation
2.2 Major Components
Pothole
Protection Device
Platform Control
Console
Main Platform
Manual Storage
Box
Extension
Platform
Maintenance
Support
Battery Tray
Lifting
Mechanism
Hydraulic/Electric
Tray
Base
SKYJACK SJIII Series Aerial Platform

SJIII Compacts & Conventionals
December 2007 Page 15
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Section 2 - Operation Major Assemblies
2.3 Major Assemblies
The aerial platform consists of three major assemblies:
base, lifting mechanism and platform.
2.3-1 Base
The base is a rigid, one-piece weldment which supports
two swing out trays.
On Models 3215 and 3219 (Compacts):
One tray contains the hydraulic and electrical
components. The other tray contains four (4) 6 volt
batteries. The charger is located at the rear of the
aerial platform. The front axle has two hydraulic
motor-driven wheels, steerable by a hydraulic
cylinder. The rear axle is fixed and has non-driven,
spring-applied, hydraulically released brake.
On Models 3220, 3226, 4620, 4626 and
4632 (Conventionals):
One tray contains the hydraulic and electrical
components. The other tray contains battery
charger and four (4) 6 volt batteries. The front axle
has two non-driven wheels, steerable by a hydraulic
cylinder. The rear axle has two hydraulic motor-
driven wheels with spring-applied, hydraulically
released brakes.
2.3-2 Lifting Mechanism
The lifting mechanism is constructed of formed steel or
tube sections making up a scissor-type assembly. The
scissor assembly is raised and lowered by single-acting
hydraulic lift cylinders with holding valves. A pump,
driven by an electric motor, provides hydraulic power
to the lift cylinders.
2.3-3 Platform
The platform is constructed of a tubular support frame,
a skid-resistant “diamond plate” deck surface and 1.1 m
hinged guardrails with 0.15 m toe boards and mid-rails.
The platform can be entered from the rear through a
spring-returned gate with latch. The platform is also
equipped with a manual extension platform. An AC
outlet is also located on the platform.
2.4 Serial Number Nameplate
The serial number nameplate, located at the rear of the
aerial platform, lists the following:
Model number•
Serial number•
Capacity and maximum number of persons•
permissible on the platform
Maximum wind speed•
Maximum manual force•
Machine weight•
Drive height•
Platform height•
System pressure•
Lift pressure•
Wheel load•
Voltage•
Maximum incline•
Year of manufacture•

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Page 16 December 2007
SJIII Compacts & Conventionals
Component Identification Section 2 - Operation
2.5 Component Identification
The following descriptions are for identification,
explanation and locating purposes only.
2.5-1 Main Power Disconnect Switch
This switch is located at the rear of the base.
1
Figure 2-1. Main Power Disconnect Switch
1. Main Power Disconnect Switch - This switch,
when in “ ” off position, disconnects power to
all circuits. Switch must be in “ ” on position to
operate any circuit. Turn switch “ ” off when
transporting aerial platform.
2.5-2 Tilt Alarm
The aerial platform is equipped with a device which
senses when the aerial platform is out of level in any
direction. When activated, it disables drive and lift
functions of the aerial platform and an alarm produces
an audible sound accompanied by the amber light
(if equipped).
WARNING
If the tilt alarm sounds and the platform
does not, or only partially raises,
immediately lower the platform completely
and ensure that the aerial platform is on
a firm level surface.
2.5-3 Load Sensing System
This system is a safety device that will prevent any
normal movement of the aerial platform from a stationary
working position after the rated load is reached and
exceeded. Refer to Table 2.5 for maximum platform
capacities.
When 90% of the rated load is reached:•
The red power indicator light on the platform
control console flashes.
When the rated load is reached:•
An audible alarm sounds for approximately
2 seconds, 5 times per minute.
When the rated load is exceeded:•
The flashing light and audible alarm continue and
all electrically controlled aerial platform movement
functions stop. To resume normal operation,
remove the overload from the platform.
If the aerial platform comes in contact with an•
overhead obstruction:
The platform could become overloaded and all
functions would stop. Release of the platform
from this situation can only be effected by use
of the emergency lowering system. Refer to
Section 2.15.
NOTE
After reaching full extension and upon
lowering, the aerial platform could stop
and take an overload reading. Return the
controller to the neutral center position,
and release the enable trigger switch. If the
aerial platform is overloaded, the flashing
light and audible alarm continue and
all electrically controlled aerial platform
movement functions stop. To resume
normal operation, remove the overload
from the platform.

SJIII Compacts & Conventionals
December 2007 Page 17
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Section 2 - Operation Component Identification
2.5-4 Base Control Console
This control console is located at the rear of the base.
It contains the following controls:
1
2
3
Figure 2-2. Base Control Console
1. Lower/Neutral/Raise Switch - This switch controls
“” raising or “ ” lowering of platform.
2. Off/Platform/Base Key Switch - This three-way
switch allows the operator to turn “ ” off power
to aerial platform or to activate either “ ” platform
or “ ” base controls.
3. Emergency Stop Button - This button “ ”,
when depressed, disconnects power to the control
circuit.
2.5-5 Electrical Panel
This panel is located in the hydraulic/electric tray. It
contains the following controls:
21
Figure 2-3. Electrical Panel
1. Circuit Breaker Resets - In the event of power
overload or positive circuit grounding, the circuit
breaker pops out. Push the breaker back in to
reset.
2. Hourmeter - This gauge records accumulated
operating time of the aerial platform.
2.5-6 Disc Brake System
The brake system is located at the rear of the base.
The brakes must be manually disengaged before
pushing, winching or towing. Refer to Section 2.14-2
for procedure on how to release brakes manually. The
system contains the following controls:
21
Figure 2-4. Disc Brake System
1. Brake auto reset valve plunger
2. Brake hand pump

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Page 18 December 2007
SJIII Compacts & Conventionals
Component Identification Section 2 - Operation
2.5-7 Free-wheeling Valve
1
Models 3220, 3226, and 46xx
1
Models 3215 and 3219
Figure 2-5. Free-wheeling Valve
1. Free-wheeling Valve - The free-wheeling valve
is located at the front and/or rear of the aerial
platform (depending on the model). Refer to
Section 2.14-1 for procedure on how to release
the free-wheeling valve.
2.5-8 Battery Charger
The charger is located at the rear of the base or inside
the battery tray. Refer to Section 2.17-2 for battery
charging operation.
Figure 2-6. Battery Charger
2.5-9 Pothole Protection Device
1
Figure 2-7. Pothole Protection Device
1. Pothole Protection Device -This device consists
of a set of mechanically actuated steel weldments
located under the hydraulic/electric tray and battery
tray. These weldments will automatically rotate for
reduced ground clearance when elevating the
aerial platform. If the pothole protection device
has not fully lowered, the drive function will be
disabled.
WARNING
Crushing Hazard - Personnel on ground
must stay clear of pothole protection
device.
WARNING
Do not drive elevated in areas where
electrical cords or debris are in the path
of travel.
Maintenance of the Pothole
Protection Device
As with all safety devices, periodic inspection and
maintenance is required to ensure the proper
operation of the pothole protection device.
This mechanism is designed to reduce ground
clearance and assist in the stability of an elevated
aerial platform in the event the aerial platform
encounters a “drop-off” or “pothole.” The nature
of this safety feature relies on maintaining a
consistent ground clearance, therefore, if the aerial
platform ever does come to rest on the pothole
device, the platform should be immediately
lowered and “locked out” to prevent further use
until a complete inspection of the mechanism is
performed by a qualified technician.

SJIII Compacts & Conventionals
December 2007 Page 19
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Section 2 - Operation Component Identification
2.5-10 Emergency Lowering System
This emergency lowering system allows platform
lowering in the event of an emergency or an electrical
system failure. Refer to Section 2.15 for the emergency
lowering procedure. The system contains the following
controls:
2
1
3
Figure 2-8. Emergency Lowering System
1. Holding Valve Manual Override Knob - Located
on the holding valve at the bottom of each lift
cylinder.
2. Emergency Lowering Valve - Located at the rear
of the hydraulic/electric tray.
3. Access Rod (3226, 4626 & 4632) - Located at the
left side of the base.
2.5-11 Lowering Warning System
A lowering warning system automatically stops the
lowering function before reaching the fully retracted
position and sounds an alarm.
2.5-12 Maintenance Support
1
Figure 2-9. Maintenance Support
1. Maintenance Support - The maintenance support
is a safety mechanism designed to support the
scissor assembly. When properly positioned it
can support the scissor assembly and empty
platform. The maintenance support must be used
when inspection and/or maintenance is to be
performed within the lifting mechanism. Refer to
Section 2.16 for procedure on how use and store
the maintenance support.
WARNING
The maintenance support must be used
when inspection and/or maintenance or
repairs are to be performed within the
lifting mechanism. Failure to use this
safety mechanism could result in death
or serious injury.
WARNING
Do not reach through the scissor assembly
when the platform is raised without the
maintenance support properly positioned.
Failure to avoid this hazard could result
in death or serious injury.

TM
Page 20 December 2007
SJIII Compacts & Conventionals
Component Identification Section 2 - Operation
2.5-13 Platform Control Console
This removable control console is mounted at the right
front of the platform. It contains the following controls:
1
2
3
54
6
Figure 2-10. Platform Control Console
with Toggle Switch
1
2
3
74
Figure 2-11. Platform Control Console
with Rotary Switch
1. Lift/Drive/Steer Enable Trigger Switch -This
momentary “ ” switch energizes the controller.
It must be held depressed continuously while
engaging either the lift/drive or steer functions.
2. Lift/Drive/Steer Controller - This one-hand lever
controls lift/drive and steer motions. Internal
springs return it to neutral when controller is
released.
3. Emergency Stop Button/Operation Light - This
button “ ”, when depressed, disconnects
power to the control circuit. The operation light
indicates upper control availability and overload
status. When the light is continuously illuminated,
upper controls are available. When the light is
flashing, it signals an overload function. Refer to
Section 2.5-3.
4. Horn Pushbutton - This “ ” pushbutton sounds
an automotive-type horn.
5. Inclined Drive/Level Drive Switch (If Equipped)
- This switch selects “ ” inclined drive (low
speed/high torque) or “ ” level drive (high
speed/low torque).
NOTE
Inclined drive (low speed/high torque) is
not available on models 3215 and 3219.
6. Lift/Off/Drive Switch - Selecting “ ” off position
disconnects power from both lift and drive circuits.
Selecting “ ” lift position energizes the lift circuit.
Selecting “ ” drive position energizes the drive
circuit.
7. Lift/Inclined Drive/Level Drive Switch - This
switch selects “ ” lift, “ ” inclined drive (low
speed/high torque) or “ ” level drive (high
speed/low torque).
NOTE
Inclined drive (low speed/high torque) is
not available on 3215 and 3219 models.

SJIII Compacts & Conventionals
December 2007 Page 21
TM
Section 2 - Operation Component Identification
2.5-14 Manual Storage Box
This weather-resistant box is mounted on the platform
railings. It contains the operating manual,
EC declaration and other important
documents. The operating manual for
this make and model of aerial platform
must be stored in this box.
2.5-15 Folding Guardrail System
This system, when folded down, reduces the height
of the retracted aerial platform for transporting and
traveling through doorways only. Refer to Section 2.11
for guardrail folding procedure.
1
Entrance Left
Right
Extension
Figure 2-12. Folding Guardrail System
1. Guardrail Locking Pin with Lanyard - This pin is
used to lock the guardrail in place.
WARNING
The scissor assembly must be fully
lowered before raising or lowering the
guardrails.
2.5-16 Lanyard Attachment Anchorage
1
Figure 2-13. Lanyard Attachment Anchorage
1. Lanyard Attachment Anchorage - Use this as an
attachment point for safety belt/harness tethers.
Do not attach belts/harnesses to any other point
on the platform. Do not use this point to lift,
anchor, secure or support the platform or any
other apparatus or material.
WARNING
The lanyard attachment anchorage
is used for travel restraint, within the
limits of the platform only. It is not a fall
arresting device! Use as such could result
in death or serious injury.

TM
Page 22 December 2007
SJIII Compacts & Conventionals
Component Identification (Special Options) Section 2 - Operation
2.6 Component Identification
(Special Options)
This section describes the components that are optional
to aerial platforms.
2.6-1 Powered Extension Control Console
(If Equipped)
This control console is mounted on one of the extension
platform guardrails. It contains the following controls:
1
2
Figure 2-14. Powered Extension Control Console
1. Enable Switch - This switch, when activated and
held, allows the extension platform extend/retract
switch functions to operate.
2. Extend/Retract Switch - This switch, when
activated, “ ” extends or “ ” retracts
the powered extension platform. Refer to
Section 2.10-9 onhow toextend/retractthe powered
extension platform.
2.6-2 1500W AC Inverter (If Equipped)
The inverter is located on the base of the aerial platform.
It has the following controls:
1
2
4
3
Figure 2-15. 1500W AC Inverter
NOTE
The inverter operation is automatic. These
controls do not need to be manipulated for
normal operation.
1. Status LEDs - These LEDs indicate the operating
or fault status of the inverter.
2. On/Off Switch - This diagnostic slide switch
activates or terminates inverter operation. It should
remain in on position.
3. GFCI Outlet - During inverter operation, this outlet
provides AC power.
4. 15 Amp Circuit Breaker - In the event of a power
overload or circuit grounding, the circuit breaker
pops out. Press the breaker back in to reset.
2.6-3 Motion Alarm (If Equipped)
The alarm produces an audible sound when any
control function is selected. On aerial platforms with
certain options, a flashing amber light will accompany
this alarm.