Skyjack 7127 User manual

TM
OPERATING MANUAL
ANSI/CSA
This manual must be kept and stored with the aerial platform at all times.
For Service please call ........................................................................800 275-9522
Skyjack Service Center, 3451 Swenson Ave., St. Charles, IL. 60174, USA .... FAX [phone]
For Parts in North America and Asia please call .................................... 800 965-4626
Skyjack Parts Center, 3451 Swenson Ave., St. Charles, IL. 60174, USA................ FAX [phone]
For Parts & Service in Europe please call ................................................. 44-1691-676-235
Skyjack Europe, Glovers Meadow, Maesbury Rd., Oswestry, Shropshire, U.K ......FAX [phone]
143861AB-A Printed in Canada February 2008
Operating Manual - ANSI/CSA
Rough Terrain Series Models:
Mid Size: 7127, 7135, 8243 & 8850
Full Size: 8831, 8841 & 9250
Engine Powered

SKYJACK, Page 2
February 2008
Mid Size & Full Size RT’s
Engine Powered
TM
Rough Terrain Series
Mid Size: 7127, 7135, 8243 & 8850
Full Size: 8831, 8841 & 9250
118945AA 122883AH 129907AB 129922AE 143861AB 143884AA
January 2000 June 2002 August 2003 April 2006 February 2008 February 2008
7027
33188 & Below 33189 & Above
7127
7135
8243
8850
Not Used 340000 to 340268 340269 to 341123 341124 to 343834
34 000 001 to 34 001 506 34 001 507 & Above
8831
37054 & Below 37055 to 37361 37362 to 37451 37452 to 37805
36 000 001 to 36 000 193 36 000 194 & Above
8841
42202 & Below 42203 to 42837 42838 to 43103 43104 to 43822
40 000 001 to 40 000 441 40 000 442 & Above
9250
50771 & Below 50772 to 51094 51095 to 51388 51389 to 51934
50 000 001 to 50 000 512 50 000 513 & Above
60101AL-ANSI-R
MANUAL
PART NUMBER
USE THE SERIAL NUMBER OF YOUR MACHINE TO DETERMINE THE CORRECT OPERATING MANUAL TO USE
Mid Size
RTs
M
O
D
E
L
Release Date
Full Size
RTs
Not Used

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SKYJACK, Page 3
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.
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.
This document is a translation from English.
In case of discrepancy between the English document and this document, the English
version prevails.

SKYJACK, Page 4
February 2008
Mid Size & Full Size RT’s
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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 ...................................................................................................................................................9
Safety Precautions .....................................................................................................................................................10
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 Emergency Main Power Disconnect Switch.....................................................................................16
2.5-2 Motion Alarm.....................................................................................................................................16
2.5-3 Tilt Alarm ...........................................................................................................................................16
2.5-4 Base Control Console.......................................................................................................................16
2.5-5 Engine Control Console....................................................................................................................17
2.5-6 Brake System....................................................................................................................................18
2.5-7 Emergency Lowering System...........................................................................................................18
2.5-8 Propane Cylinder (If Equipped)........................................................................................................19
2.5-9 Maintenance Support .......................................................................................................................19
2.5-10 Manual Storage Box .........................................................................................................................19
2.5-11 Folding Guardrail System .................................................................................................................20
2.5-12 Lanyard Attachment Anchorage.......................................................................................................20
2.5-13 AC Outlet on Platform .......................................................................................................................20
2.5-14 Platform Control Console .................................................................................................................21
2.6 Component Identification (Special Options)...................................................................................................22
2.6-1 Generator/Outrigger Control Console (If Equipped)........................................................................22
2.6-2 Powered Extension Control Console (If Equipped) .........................................................................22
2.6-3 1500W AC Inverter (If Equipped)......................................................................................................23

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SKYJACK, Page 5
Table of Contents
Section 2 - Operation (Continued)
2.7 Operator’s Responsibility ................................................................................................................................24
2.8 Visual and Daily Maintenance Inspections .....................................................................................................25
2.9 Function Tests..................................................................................................................................................35
2.10 Start Operation ................................................................................................................................................40
2.10-1 To Activate Base Control Console ....................................................................................................40
2.10-2 To Raise or Lower Platform Using Base Console.............................................................................41
2.10-3 To Activate Platform Control Console...............................................................................................41
2.10-4 To Raise or Lower Platform Using Platform Control Console ..........................................................42
2.10-5 To Drive Forward or Backward .........................................................................................................42
2.10-6 To Steer .............................................................................................................................................43
2.10-7 To Select Drive Torque ......................................................................................................................43
2.10-8 To Extend or Retract Powered Extension Platform (If Equipped) ....................................................43
2.10-9 To Extend or Retract Manual Extension Platform .............................................................................44
2.10-10 Hydraulic Outriggers (If Equipped) ..................................................................................................45
2.10-11 Generator (If Equipped)....................................................................................................................46
2.10-12 Electrical Inverter (If Equipped) ........................................................................................................46
2.10-13 Shutdown Procedure ........................................................................................................................46
2.11 Refueling Procedure........................................................................................................................................48
2.11-1 Regular Fuel......................................................................................................................................48
2.11-2 Propane.............................................................................................................................................49
2.12 Loading/Unloading..........................................................................................................................................50
2.12-1 Lifting.................................................................................................................................................50
2.12-2 Driving ...............................................................................................................................................51
2.13 Winching and Towing Procedure....................................................................................................................52
2.13-1 To Release the Brakes Manually.......................................................................................................52
2.14 Guardrail Folding Procedure...........................................................................................................................54
2.15 Emergency Lowering Procedures ..................................................................................................................56
2.16 Maintenance Support Procedure....................................................................................................................57
2.17 Tables...............................................................................................................................................................59
2.18 Labels ..............................................................................................................................................................69
List of Tables
Table 2.1 Standard and Optional Features .............................................................................................................59
Table 2.2 Owner’s Annual Inspection Record .........................................................................................................60
Table 2.3 Specifications and Features.....................................................................................................................61
Table 2.4 Maximum Platform Capacities (Evenly Distributed) ...............................................................................62
Table 2.5 Maximum Platform Capacities (Evenly Distributed with Optional #7 Tires) ..........................................63
Table 2.6 Floor Loading Pressure............................................................................................................................64
Table 2.7 Tire Specifications....................................................................................................................................66
Table 2.8 Maintenance and Inspection Schedule ...................................................................................................67
Table 2.9 Operator’s Checklist ................................................................................................................................68

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SKYJACK, Page 7
Read and Heed Section 1 - About Your Aerial Platform
1
SKYJACK is continuously improving and expanding product features on its equipment, therefore, specifications
and dimensions are subject to change without notice.
Aerial Platform Definition
A mobile device that has an adjustable position platform supported from ground level by a structure.
Purpose of Equipment
The SKYJACK Rough Terrain’s mid and full size aerial platform 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. It can be driven over uneven terrain only when the platform is fully lowered.
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 SJRT Series aerial 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 non-standard components or systems, contact the SKYJACK Service Department at
(: 800 275-9522
7: 630 262-0006
Include the model and serial number for each applicable aerial platform.
Scope of this Manual
a. This manual applies to the ANSI/SIA, CSA version of the Mid Size and Full Size Rough Terrain aerial platform
models listed on Table 2-1.
- Equipment identified with “ANSI” meets the ANSI SIA-A92.6-2006 standard.
- Equipment identified with “CSA” meets the CSA B354.2-01 standard.
b. CSA (Canada)
Operators are required to conform to national, territorial/provincial and local health and safety regulations
applicable to the operation of this aerial platform.
c. ANSI/SIA (United States)
Operators are required by the current ANSI/SIA A92.6 standards to read and understand their responsibilities
in the manual of responsibilities before they use or operate this aerial platform.

SKYJACK, Page 8
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 1 - About Your Aerial Platform Safety Rules
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.

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SKYJACK, Page 9
Safety Rules Section 1 - About Your Aerial Platform
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.
Per ANSI A92.6-2006 8.10(7)
“The operator shall perform only that work for which he or she is qualified, in compliance with all applicable
safety related work practices intended to prevent electric shock covered by the Code of Federal Regulations
(CFR) 1910.333. The operator’s level of competence shall be established only by persons qualified to do so.
Operators shall maintain the appropriate minimum approach distance (MAD) from energized power lines and parts
covered by CFR 1910.333 (c).”
Unqualified persons must maintain a minimum approach distance of 10 feet from any energized power line up to
50 kV. Energized power lines over 50 kV require a greater minimum approach distance to be maintained. Refer to
CFR 1910.333.
As per CSA B354.2-01
“The operator shall maintain the minimum safe approach distance (MSAD) from energized conductors at all times
in accordance with the authority having jurisdiction.”
As per AS 2550.1-2002
Elevating Work Platforms must remain 6.4 m from electrical distribution lines up to 133 kV and 8 m from transmission
lines greater than 133 kV. State regulations may take precedence over these approach distances.
DO NOT USE THE AERIAL PLATFORM AS A GROUND FOR WELDING.
DO NOT OPERATE THE AERIAL PLATFORM DURING LIGHTNING OR STORMS.
Voltage Range Minimum Safe Approach Distance
(Phase to Phase) (Feet)
0 to 300V Avoid Contact
Over 300V to 50KV 10
Over 50KV to 200KV 15
Over 200KV to 350KV 20
Over 350KV to 500KV 25
Over 500KV to 750KV 35
Over 750KV to 1000KV 45
60023AD-ANSI
DANGER
FAILURE TO AVOID THIS HAZARD WILL RESULT IN DEATH OR SERIOUS INJURY!
Avoid Power Lines
Minimum Safe Approach Distance
ANSI/SIA A92.6-2006 & CSA B354.2-01 Requirements

SKYJACK, Page 10
February 2008
Mid Size & Full Size RT’s
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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/provincial and local
rules which apply to your aerial platform and
jobsite.
• TURN the emergency main power disconnect
switch off when 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
aerial platform.
• 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, ascending or
descending, only grades up
to rated maximum listed in
Table 2.3 are permissible.




Mid Size & Full Size RT’s
Engine Powered February 2008
SKYJACK, Page 11
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.
• DO NOT raise the platform
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/chain/
bar in place.

SKYJACK, Page 12
February 2008
Mid Size & Full Size RT’s
Engine Powered
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.
Fall Protection
As per the ANSI A92.6-2006 standard, “The
guardrail system of the aerial platform provides
fall protection. If occupant(s) of the platform are
required to wear personal fall protection equipment
(PFPE), occupants shall comply with instructions
provided by the aerial platform manufacturer
(remanufacturer) regarding anchorage(s).”
If additional fall protection is required, by an
employer or the authority having jurisdiction,
Skyjack recommends the use of a fall restraint
system to keep an occupant within the confines
of the platform, and thus not expose the occupant
to any fall hazard requiring a fall arrest.
All personal fall protection equipment must
comply with applicable governmental regulations
and must be inspected and used in accordance
with the manufacturer’s recommendations.
All personal fall protection equipment must be
attached only to approved anchorage points
within the platform of the aerial platform.
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 blocked 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.

Mid Size & Full Size RT’s
Engine Powered February 2008
SKYJACK, Page 13
Section 2 - Operation
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 2.8, 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 2.8 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 2.8 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.

SKYJACK, Page 14
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation
SKYJACK Model 7127 Aerial Platform
Platform Control ConsoleEntry Gate
Base
Main Platform
Lifting
Mechanism
Hydraulic/
Electrical
Compartment
Extension
Platform
Maintenance
Support
2.2 Major Components
Outrigger
Engine
Compartment

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SKYJACK, Page 15
Section 2 - Operation
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 side compartments.
Models 71xx & 88xx
One compartment contains the hydraulic and•
electrical components, and base control console.
The other compartment contains the fuel and
hydraulic tanks.
The propane cylinder is either located behind the•
access ladder or behind the fuel compartment.
The front axle is steered by a hydraulic cylinder•
and is either non-driven (2WD) or drive shaft/gear
box driven (4WD).
The rear axle is drive shaft/gear box driven and•
has a spring-applied hydraulically released disc
brake.
A roll-out tray at the front of the base supports an•
engine coupled with a two-section hydraulic pump
providing power to the hydraulic system.
An engine control console is also located at the•
front of the base.
The 12V starter battery is located in the hydraulic/•
electrical compartment or at the front of the engine
roll-out tray.
Model 9250
One compartment contains the hydraulic tank,•
hydraulic and electrical components, base control
console, emergency lowering battery and starter
battery.
The other compartment contains the fuel tank and•
Liquid Propane (LP) tank (if equipped).
The front axle is steered by a hydraulic cylinder•
and is either non-driven (2WD) or drive shaft/gear
box driven (4WD).
The rear axle is drive shaft/gear box driven and•
has two spring-applied hydraulically released
brakes.
A roll-out tray at the front of the base supports an•
engine coupled with a two-section hydraulic pump
providing power to the hydraulic system.
An engine control console is also located at the•
front of the base.
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 two-section
pump, driven by an engine, 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” platform surface and
39” hinged guardrails with 6” toe boards and mid-rails.
The platform can be entered from either side through
a spring-returned gate for full size RT’s and from the
rear through a spring-returned gate for mid Size RT’s.
The full size RT’s can be equipped with a front or rear
(or both) extension platform(s). The mid size RT’s are
equipped with a front extension platform. A 110V 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•
Aerial platform weight•
Maximum drivable height•
Maximum capacities•
Maximum number of persons permissible on•
the platform
Voltage•
System pressure•
Lift pressure•
Maximum platform height•
Maximum wheel load•
Maximum wind speed•
Maximum manual force•
Maximum incline•

SKYJACK, Page 16
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation Component Identification
2.5 Component Identification
The following descriptions are for identification,
explanation and locating purposes only.
2.5-1 Emergency Main Power Disconnect
Switch
This switch is located at the side of the hydraulic/
electrical compartment.
1
Figure 2-1. Emergency Main Power Disconnect Switch
Emergency Main Power Disconnect Switch1.
- 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 Motion Alarm
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.
2.5-3 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
the alarm sounds, lower the platform completely, then
reposition aerial platform so that it is level before raising
the platform.
NOTE
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.
2.5-4 Base Control Console
This control console is located in the hydraulic/electrical
compartment. It contains the following controls:
1
4
4
3
2
Figure 2-2. Electrical Panel
Hourmeter1. - This gauge records accumulated
operating time of engine.
Platform Raise Pushbutton2. - This pushbutton
controls “ ” raising of platform.
Platform Lower Pushbutton3. - This pushbutton
controls “ ” lowering of platform.
Circuit Breakers4. - In the event of a power overload
or positive circuit grounding, the circuit breaker
pops out. Push breaker back in to reset.

Mid Size & Full Size RT’s
Engine Powered February 2008
SKYJACK, Page 17
Component Identification Section 2 - Operation
2.5-5 Engine Control Console
This control console is attached to the engine at the front
of the base. It contains the following controls:
1
2
3
Figure 2-3. Engine Control Console - Dual Fuel
5
4
6
2
Figure 2-4. Engine Control Console - Gasoline Engine
(Shown with Dual Fuel)
4
5
8
7
Figure 2-5. Engine Control Console - Diesel Engine
1. Engine Off/On/Start Switch - This switch, when
set to middle position, will energize engine circuit.
Set switch to up position to start engine (switch
will return to middle position when released.) Set
switch to down position to turn engine off.
2. Fuel Select Switch - Used to switch between
“” liquid propane gas and “ ” gasoline.
3. Engine Warning Light - When engine switch is set
to on position, the amber-colored light will flash
continuously to indicate normal operation.
4. Engine Off/On Switch - This switch, when pulled
out, will energize engine circuit and platform
control console. Push switch in to turn engine
off.
5. Engine Start Pushbutton - This pushbutton “ ”
energizes the engine starter motor.
6. Engine Choke Pushbutton - This pushbutton
sets the choke for starting a cold gasoline/propane
engine. The choke remains fully engaged only
while the button is pressed. Choke returns to
normal position as soon as button is released.
7. Glow Plug Pushbutton - This pushbutton
energizes the glow plugs to aid in starting a cold
diesel engine. Glow plugs are only active while
pushbutton is depressed.
8. Glow Plug Indicator Light - This red lamp “ ”
illuminates until the glow plugs have completed
the timed heating cycle. When the lamp goes out,
the engine is ready to be started.

SKYJACK, Page 18
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation Component Identification
2.5-6 Brake System
The brake system for model 71xx & 8xxx is located on the
main manifold in the hydraulic/electrical compartment.
For model 9250, it is located at the rear of the base. The
brakes must be manually disengaged before pushing,
winching or towing. Refer to Section 2.13 for procedure
on how to release the brake manually. The system
contains the following controls:
Pin Brakes - Model 9250 (if equipped)
2
1
Disc Brake - Models 71xx & 8xxx (if equipped)
Figure 2-6. Brake System
1. Brake Hand Pump
2. Brake Auto Reset Valve Plunger
2.5-7 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 procedures. The system contains the following
controls:
Models 71xx & 8xxx
1
3
2
Figure 2-7. Emergency Lowering System
Holding Valve Manual Override Knob1. - Located
on the holding valve at the bottom of each lift
cylinder.
Emergency Lowering Valve2. - Located at the rear
of the hydraulic/electrical compartment.
Emergency Lowering Access Rod3. - Located at
the right side of the base.
Model 9250
This emergency lowering system is located on the
hydraulic tank and is accessed through a hole in the
hydraulic/electrical compartment door.
2
1
Figure 2-8. Emergency Lowering System
1. Emergency Lowering Pushbutton
2. Emergency Lowering Valve

Mid Size & Full Size RT’s
Engine Powered February 2008
SKYJACK, Page 19
Component Identification Section 2 - Operation
2.5-8 Propane Cylinder (If Equipped)
The propane cylinder is located on the base of the aerial
platform. It has the following control:
11
Figure 2-9. Propane Cylinder
1. Cylinder Main Valve - Turn this valve clockwise to
shut off the fuel supply; counterclockwise to open
it.
2.5-9 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. To lower the
maintenance support, push lock lever rearward and the
maintenance support will drop. Refer to Section 2.16 for
procedure on how to use and store the maintenance
support.
Figure 2-10. 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.
2.5-10 Manual Storage Box
This weather-resistant box is mounted inside of the
hydraulic/electrical compartment.
It contains operating manual,
ANSI manual of responsibility and
ANSI/CSA certificate. The operating
manual for this make and model of
aerial platform must remain with the
aerial platform and should be stored
in this box.

SKYJACK, Page 20
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation Component Identification
2.5-11 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 2.14
for guardrail folding procedure.
DETENT BALL
Clear of side of
pivot bracket
1
Correct position of locking pin
Figure 2-11. Guardrail Locking Pin
WARNING
The scissor assembly must be fully
lowered before raising or lowering the
guardrails.
WARNING
Before operating this aerial platform
check the guardrail system for loose
or missing locking pins. The guardrail
system must be upright and all pins must
be locked in place. Death or serious injury
could result if the guardrail system is not
upright or properly locked.
2.5-12 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.
Figure 2-12. Lanyard Attachment Ring
WARNING
The lanyard attachment anchorage
is used for travel restraint, within the
limits of the platform only. It is not a fall
arresting device! Used as such could
result in death or serious injury.
2.5-13 AC Outlet on Platform
This outlet is a source of 110V power on the platform.
Figure 2-13. AC Outlet on Platform

Mid Size & Full Size RT’s
Engine Powered February 2008
SKYJACK, Page 21
Component Identification Section 2 - Operation
2.5-14 Platform Control Console
This removable control console is mounted at the right
front of the platform. It contains the following controls:
2
1
3
4
56
7
8
10
9
11
12
13
Figure 2-14. Platform Control Console
1. Torque Switch - This switch, when in
“” high torque position, cuts out high range
and 3rd speed to provide maximum torque when
climbing grades and on rough terrain. When in
“” low torque position, all three speeds are
available.
2. Horn Pushbutton - This “ ” pushbutton sounds
an automotive-type horn.
3. Engine Choke Pushbutton (Dual Fuel) - This
pushbutton switch sets the choke for starting a
cold gasoline/propane engine.
Glow Plug Pushbutton (Diesel) - This pushbutton
energizes the “ ” glow plugs to aid in starting a
cold diesel engine.
4. Engine Start Pushbutton - This “ ” pushbutton
energizes the engine starter motor.
NOTE
The engine start pushbutton is interlocked
with the oil pressure switch. If engine stalls
or does not start immediately, this button
will not work for a few seconds while oil
pressure bleeds off.
5. Lift Enable Pushbutton - When depressed and
held, this “ ” pushbutton allows the lift
functions to operate.
6. Emergency Stop Button -This button “ ”, when
depressed, disconnects power to control circuit
and shuts engine off.
7. Off/Lift/Drive Key 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.
8. Raise/Off/Lower Switch - This switch controls
raising or lowering of the platform.
9. Operation Light - The red colored light indicates
upper control availability. When the light is
continuously illuminated, upper controls are
available.
10. High/Low Torque Switch - This switch selects
“” high torque (low speed) or “ ” low
torque (high speed).
11. Low/High Throttle Switch - This rotary switch
allows selection between “ ” low and “ ”
high engine throttle speeds.
12. Drive/Steer Controller - This one-hand lever
controls drive speed and steer motion. Internal
springs return it to neutral when controller is
released. The rocker switch on top of controller
handle controls steering function.
13. Drive/Steer Enable Trigger Switch - This
momentary “ ” switch energizes the controller.
It must be held depressed continuously while
engaging either drive or steer functions.