Skyjack SJ 46AJ User manual

.
ARTICULATING BOOMS
MODELS SJ46AJ SJ51AJ
170493AFA April 2019
OPERATING MANUAL (CE)

This manual is based on Serial Number(s):
SJ46AJ/SJ51AJ 95 001 105 & Above
SJ46AJ/SJ51AJ B301 000 001 & Above
Please refer to the website (www.skyjack.com) for older Serial Numbers.
Parts (North America)
Toll Free: 1-800-965-4626
Toll Free Fax: [phone]
E-mail: [email protected]
Skyjack Australia Pty Ltd.
Unit 1, 35 Honeycomb Drive
Eastern Creek
New South Wales 2766
Australia
Tel: [phone]
Fax: [phone]
Skyjack Brasil
Indaiatuba, SP, Brasil 13347-653
Tel: [phone]
Alameda Júpiter, 710
Loteamento American Park Empresarial
Skyjack Service Center
3451 Swenson Ave. St. Charles,
Phone: [phone]
Toll Free: 1-800-275-9522
Fax: [phone]
Email: [email protected]om
Illinois, 60174 USA
Parts & Service (Europe)
Unit 1 Maes Y Clawdd
Oswestry, Shropshire SY10 8NN UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Maesbury Road Industrial Estate

SJ 46AJ & SJ 51AJ
December 2007 Page 3
The Safety Alert Symbol identies important
safety messages on MEWP, 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 MEWP.
Original instructions in English.

Page 4 December 2007
SJ 46AJ & SJ 51AJ
Section 1 - About Your MEWP ................................................................................................................ 5
Read and Heed .....................................................................................................................................................5
Safety Rules ...........................................................................................................................................................6
Section 2 - Familiarization ................................................................................................................................. 11
2.1 Familiarization of Articulated Boom Series ...............................................................................................11
2.2 Component Identication ..........................................................................................................................12
2.2-1 Main Power Disconnect Switch & Battery Charge Indicator ...........................................................12
2.2-2 Tilt Sensor ........................................................................................................................................12
2.2-3 Drive Bypass Valve .........................................................................................................................12
2.2-4 Brake System ..................................................................................................................................12
2.2-5 Differential Lock Switch ...................................................................................................................13
2.2-6 Footswitch ........................................................................................................................................13
2.2-7a Platform Load Sensing System .......................................................................................................14
2.2-7b Overload Status Table .....................................................................................................................14
2.3 Visual & Daily Maintenance Inspections ...................................................................................................20
2.4 Function Tests ............................................................................................................................................28
2.5 Winching and Towing Procedure ..............................................................................................................39
2.6 Emergency Lowering Procedures .............................................................................................................41
Section 3 - Operation .........................................................................................................................................43
3.1 General ......................................................................................................................................................43
3.2 Major Components ....................................................................................................................................44
3.3 Major Assemblies ......................................................................................................................................45
3.4 Serial Number Nameplate .........................................................................................................................45
3.5 Component Identication ..........................................................................................................................46
3.6 Component Identication (Optional Equipment/Attachments).................................................................47
3.7 Operator’s Responsibility ..........................................................................................................................48
3.8 Start Operation ..........................................................................................................................................49
3.9 Refueling Procedure ..................................................................................................................................55
3.10 Loading/Unloading ....................................................................................................................................56
3.11 Chassis Tilt.................................................................................................................................................58
Section 4 - Tables ............................................................................................................................................... 63
Table 4.1 Standard and Optional Features .........................................................................................................63
Table 4.2a Specications and Features .............................................................................................................64
Table 4.2b Specications and Features .............................................................................................................65
Table 4.3 Owner’s Annual Inspection Record .....................................................................................................66
Table 4.4 Tire/Wheel Specications ....................................................................................................................67
Table 4.5 Maximum Platform Capacities .............................................................................................................67
Table 4.6 Floor Loading Pressure .......................................................................................................................68
Table 4.7 Maintenance and Inspection Schedule ...............................................................................................69
Table 4.8 Operator’s Checklist ............................................................................................................................70
Section 5 - Labels .................................................................................................................................. 71
Table of Contents

SJ 46AJ & SJ 51AJ
December 2007 Page 5
Section 1 - About Your Aerial Platform Read and Heed
SKYJACK is continuously improving and expanding product features on its equipment, therefore, specications and
dimensions are subject to change without notice.
Mobile Elevating Work Platform (MEWP) Definition
A mobile device that has an adjustable position platform supported from ground level by a structure.
Purpose of Equipment
The SKYJACK Articulating Boom Series (Models SJ 46AJ & SJ 51AJ) MEWP is designed to transport and raise
personnel, tools and materials to overhead work areas.
Use of Equipment
The MEWP is a highly maneuverable, mobile work station. Lifting and driving must be on a at, 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 MEWP. 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 MEWP 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 MEWP. Compare the labels on the MEWP 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 articulating series work platform to be free of defective parts and workmanship for
the rst 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 MEWP is designed to accept a variety of optional accessories. These are listed under “Standard
and Optional Features” in Table 4.1. Operating instructions for these options (if equipped) are located in Section 3
of this manual.
For non-standard components or systems, contact the SKYJACK Service Department at
( : 44-1691-676-235
7 : 44-1691-676-238
Include the model and serial number for each applicable MEWP.
Scope of this Manual
a. This manual applies to the CE version of the Articulating Boom MEWP models listed in Table 4.1.
- Equipment identied with “CE” meets the requirements of the Machinery Directive 2006/42/EC and the EMC
Directive 2004/108/EC.
b. Operators are required to conform to national, state or territorial/provincial and local health and safety regulations
applicable to the operation of this MEWP.
1

Page 6 December 2007
SJ 46AJ & SJ 51AJ
Safety Rules Section 1 - About Your Aerial Platform
WARNING
Failure to comply with your required responsibilities in the use and operation of the MEWP 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 MEWP is
mandatory. The following pages of this manual should be read and understood completely before operating the
MEWP.
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 modications from the original design are strictly forbidden without written permission from SKYJACK.
Electrocution Hazard
This MEWP 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 MEWP does not
provide protection from contact with or proximity to an electrically charged conductor.
DO NOT USE THE MEWP AS A GROUND FOR WELDING.
DO NOT OPERATE THE MEWP DURING LIGHTNING OR STORMS.
DO NOT OPERATE THE MEWP NEAR POWER LINES. MAINTAIN A MINIMUM SAFE APPROACH
DISTANCE (MSAD) FROM ENERGIZED POWER LINES.
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”

SJ 46AJ & SJ 51AJ
December 2007 Page 7
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 MEWP and
jobsite.
• TURN main power disconnect switch “ ” off
when leaving the MEWP unattended. Remove the
key to prevent unauthorized use of the MEWP.
• 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
MEWP .
• AVOID entanglement with
ropes, cords or hoses.
• AVOID falling. Stay within the
boundaries of the guardrails.
Maintain rm footing on the
platform oor at all times while
working thereon.
• ENSURE all occupants wear
personal fall protection equipment.
• DO NOT raise the MEWP or
operate elevated in windy or
gusty conditions that exceed
the limits specied in Section 4,
Table 4.5.
• DO NOT increase the lateral
surface area of the platform.
Increasing the area exposed to
the wind will decrease MEWP
stability. Avoid tenting.
• DO NOT elevate the MEWP if it
is not on a rm, 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
MEWP.
• DO NOT elevate or drive
elevated on a slope. Elevated
driving must be done on a rm,
level surface.
• If operation in areas
with holes or drop-offs
is absolutely necessary,
elevated driving shall not be
allowed. Position the MEWP
horizontally only with the
platform fully lowered. After
ensuring that all 4 wheels
or outriggers (if equipped)
have contact with a rm, level
surface, the MEWP can be
elevated. After elevation, the
drive function must not be
activated.
• DO NOT drive elevated on a
soft or uneven surface.
• DO NOT ascend or descend a
grade steeper than 45% (2WD
& 4WD). Boom elevated driving
must only be done on rm,
level surfaces.

Page 8 December 2007
SJ 46AJ & SJ 51AJ
Safety Rules Section 1 - About Your Aerial Platform
• DO NOT operate an MEWP
that has ladders, scaffolding or
other devices mounted on it to
increase its size or work height.
It is prohibited.
• DO NOT exert horizontal
(manual) force on MEWP that
exceeds the limits specied in
Table 4.5.
• DO NOT use the MEWP as a
crane. It is prohibited.
• DO NOT climb on boom arm
assembly. It is prohibited.
• DO NOT sit, stand or climb on
the guardrails. It is prohibited.
• AVOID overhead obstructions.
Be aware of overhead
obstructions or other possible
hazards around MEWP when
lifting or driving.
• AVOID crushing hazards. Be
aware of crushing hazards
when lifting or driving. Keep all
body parts inside the MEWP.
• BE AWARE of blind spots when
operating the MEWP.
• ENSURE that there are no
personnel or obstructions in
the path of travel, including
blind spots.
• DO NOT lower the platform unless the area below
is clear of personnel and obstructions.
• DO NOT use boom to push,
pull other objects or to lift the
chassis.
• DO NOT raise the MEWP while
it is on a truck, forklift or other
device or vehicle.
• STUNT driving and horseplay are prohibited.
• ENSURE ALL tires are in good condition and lug
nuts are properly tightened.
• DO NOT use with improperly
inated/damaged tires or
wheels. Refer to Section 2:
Wheel/Tire Assembly.
• DO NOT alter or disable limit switches or other
safety devices.
• DO NOT use the MEWP without guardrails,
locking pins and the entry gate in place.
Safety Precautions (Continued)
Know and understand the safety precautions before going on to next section.

SJ 46AJ & SJ 51AJ
December 2007 Page 9
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 MEWP.
• DO NOT distribute load
unevenly.
• DO NOT use under inuence of
alcohol or drugs.
• DO NOT attempt to free a snagged platform with
lower controls until personnel are removed from
the platform.
• DO NOT position the MEWP against another
object to steady the platform.
• DO NOT place materials on the guardrails or
materials that exceed the connes of the guardrails
unless approved by Skyjack.
• DO NOT operate if MEWP is
not working properly or if any
parts are damaged or worn.
• DO NOT leave MEWP
unattended with key in key
switch.

Page 10 December 2007
SJ 46AJ & SJ 51AJ
Safety Rules Section 1 - About Your Aerial Platform
Safety Precautions (Continued)
Know and understand the safety precautions before going on to next section.
Fall Protection
Skyjack recommends the use of a fall restraint
system to keep an occupant within the connes
of the platform, and thus not expose the occupant
to any fall hazard requiring a fall arrest.
WARNING
Failure to wear personal fall protection
equipment may result in death or serious
injury.
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 MEWP should
only be done using the three points of
contact.
• Use only equipped access openings.
• Enter and exit only when the MEWP 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 MEWP 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 MEWP or the ground at all times
during entering and exiting.
WARNING
An operator should not use any MEWP that:
• does not appear to be working properly.
• has been damaged or appears to have worn
or missing parts.
• has alterations or modications 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 MEWP, to identify potential hazards
in your work area.
• Be aware of moving equipment in the area. Take
appropriate actions to avoid collision.

SJ 46AJ & SJ 51AJ
December 2007 Page 11
Section 2 - Familiarization SJ AJ Series
FAMILIARIZATION
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the aerial platform.
2
2
2.1 Familiarization of Articulated Boom Series
WARNING
MEWP Familiarization should be given only to individuals who are QUALIFIED and TRAINED
to operate an MEWP.
Do not operate this MEWP without proper authorization and training. Failure to avoid this
hazard could result in death or serious injury.
It is the responsibility of the operator to read, completely understand and follow all
instructions and warnings contained in this operating manual and on the MEWP.
149432AA
4. Activate desired boom function.
149432AA
4. Activate desired boom function.
At Platform Controls:
1. Pull out emergency stop button.
2. Depress and hold foot switch.
3. Activate emergency pump switch.
4. Activate desired boom function.
EMERGENCY LOWERING
PROCEDURE
HOUR METER
QUARTZ
COUNTER
Platform Control
Console
Base Control
Console
Manual
Box
Main Power
Disconnect
Switch
Footswitch
Brake Hand
Pump
Brake Auto
Reset Valve
Plunger
Drive Bypass
Valve

Page 12 December 2007
SJ 46AJ & SJ 51AJ
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
2.2 Component Identification
The following descriptions are for identification,
explanation and locating purposes only.
2.2-1 Main Power Disconnect Switch &
Battery Charge Indicator
This main power disconnect switch and battery charge
indicator are located in the engine compartment near
the battery.
21
Figure 2-1. Main Power Disconnect Switch
& Battery Charge Indicator
1. Battery Charge Indicator - When main power
disconnect switch is in “” on position, the battery
voltage is displayed on the charge indicator.
Refer to Section 2.4-2 for instructions on different
voltage levels of the battery.
2. 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 MEWP.
2.2-2 Tilt Sensor
The tilt sensor is located on top or inside the base
control console. It is designed to prevent driving when
MEWP is on a slope greater than a predetermined limit.
WARNING
If MEWP becomes tilted causing alarm
to sound, the platform must be fully
lowered immediately. Ensure that MEWP
is on a rm level surface before operating
the MEWP. Refer to Section 3.11 for
instructions regarding recovery from an
inclined position.
2.2-3 Drive Bypass Valve
This valve is located on the inboard side of the drive
pump and can be identied with a yellow paint mark
on it.
1
Figure 2-2. Drive Bypass Valve
1. Drive Bypass Valve with Override Stems
- This valve, when loosened two revolutions
counterclockwise, is used to override drive
relief valves so that the MEWP can be loaded or
unloaded from a trailer using a winch line.
2.2-4 Brake System
The brake system is located in the control compartment.
The brakes must be manually disengaged before
pushing, winching or towing. Refer to Section 2.5-1
for procedure on how to release brakes manually. The
system contains the following controls:
2
1
Figure 2-3. Brake System
1. Brake Auto Reset Valve Plunger
2. Brake Hand Pump
Control Functions Section 2 - Familiarization

SJ 46AJ & SJ 51AJ
December 2007 Page 13
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
2.2-5 Differential Lock Switch
This switch is located on the platform control console.
The differential locking system provides more traction
by providing equal drive to each wheel regardless of
traction. Differential locks are used to prevent from
getting stuck when driving on loose, muddy, or rocky
terrrain. Refer to Section 2.4-4 for instruction regarding
testing differential lock switch.
WARNING
Before engaging differential lock, ensure
drive/steer controller is in neutral position.
2.2-6 Footswitch
The footswitch is located on the oor of the platform.
When depressed and held, it enables controls on
platform control console.
Figure 2-4. Footswitch
NOTE
The footswitch is equipped with a 15-second
anti-tiedown feature that deactivates
footswitch when operator depresses it for
15 seconds without activating any function.
Section 2 - Familiarization Control Functions

Page 14 December 2007
SJ 46AJ & SJ 51AJ
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
2.2-7a Platform Load Sensing System
The platform load sensing system is a device that senses for an overload on the platform before the system disables
boom and drive functions. This system is active when MEWP is powered on.
If the platform is overloaded while in work mode (boom is raised greater than 15 degrees from horizontal or is
extended greater than 6 inches), the load sensing system will disable all normal functions and signal the operator
with an indicator light and an audible alarm.
If the platform is overloaded while in travel mode, the load sensing system will signal the operator with an indicator
light and an audible alarm but will not disable any normal functions.
The following table shows the progression of warnings, indicated to the operator, up to the point of overload.
2.2-7b Overload Status Table
Weight Indicator Light Audible Alarm Platform Function Controls
93% - 99% On Off Enabled
100% Flashing Off Enabled
≥ 100%
(Work Mode) Flashing Pulsing Disabled
≥ 100%
(Travel Mode) Flashing Pulsing Disabled
1133AA-CE
WARNING
Do not operate emergency power unit if platform capacity is exceeded. If the platform is overloaded
due to contact with an overhead obstruction, do one of the following:
• Remove the obstruction from the platform, then after a four-second delay normal functions
can be resumed.
• Use the emergency power unit at the base control console to release the platform from the
obstruction.
Control Functions Section 2 - Familiarization

SJ 46AJ & SJ 51AJ
December 2007 Page 15
Notes

Page 16 December 2007
SJ 46AJ & SJ 51AJ
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
1. Base/Off/Platform Key Switch - This three-way
selector switch allows operator to “ ” turn off
power to MEWP or to activate either “ ” base
or “ ” platform control console.
2a. Hourmeter - This gauge records accumulated
operating time of engine.
2b. Emergency Lowering Counter - This gauge
increments each time the emergency power unit
is activated while MEWP is in work mode and
overloaded.
3. Engine Fault - This light indicates failure in engine
control system.
4. Fly Boom Extend/Retract Switch - This switch
controls “ ” extension or “ ” retraction
of y boom.
5. Start/Function Enable/Emergency Power
Switch - This momentary switch, when held in
“ ” start position, starts engine. When held in
“ ” function enable position, allows base control
functions to operate. With engine off, and when
held in “ ” emergency power unit position,
allows base control functions to operate using
emergency power unit.
WARNING
Do not operate boom functions if platform
capacity is exceeded.
6. Platform Rotation Switch - This switch controls
“ ” left or “ ” right rotation of platform.
7. Turret Rotation Switch - This switch controls
“ ” left or “ ” right rotation of turret.
8. Main Boom Raise/Lower Switch - This switch
controls “ ” raising or “ ” lowering of
main boom.
2.2-8 Base Control Console
This control console is located in the panel mounted in the control compartment.
HOUR METER
QUARTZ
COUNTER
5
13
10
7
4
2a
1
89
11
15
12
6
3
14
2b
Figure 2-5. Base Control Console
Control Functions Section 2 - Familiarization

SJ 46AJ & SJ 51AJ
December 2007 Page 17
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
9. Platform Leveling Override Switch - This switch
overrides automatic leveling of platform and
controls “ ” tilting up or “ ” tilting
down of platform.
10. Riser Raise/Lower Switch - This switch controls
“ ” raising or “ ” lowering of riser.
11. Jib Up/Down Switch - This switch controls
“ ” up or “ ” down movement of jib.
12. Glow Plug (Diesel) - This light illuminates until
glow plugs have completed their timed cycle.
When the lamp goes out, the engine is ready to
be started..
13. E m e r g e n c y S t o p B u t t o n - T h i s r e d
“mushroom-head” “ ” pushbutton disconnects
power to control circuit and shuts engine off.
14. Engine Diagnosis Switch - When held in either
direction, this switch “ ” enables an error blink
code for engine control unit (ECU).
15. Circuit Breakers - In the event of a power overload
or positive circuit grounding, the circuit breaker
pops out. Push breaker back in to reset.
2.2-8 Base Control Console (Continued)
HOUR METER
QUARTZ
COUNTER
5
13
10
7
4
2a
1
89
11
15
12
6
3
14
2b
Figure 2-5. Base Control Console
Section 2 - Familiarization Control Functions

Page 18 December 2007
SJ 46AJ & SJ 51AJ
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
2.2-9 Platform Control Console
This control console is mounted at front guardrail of the platform. It has the following controls:
1. Engine Start/On/Off Switch - This switch, when
held momentarily in “ ” start position, starts
engine. Once started, the switch returns to “ ”
on position. When in “ ” off position, it turns
engine off.
2. Horn Pushbutton - This “ ” pushbutton sounds
an automotive-type horn.
3. Status Indicator Pilot Lights - These lights
indicate operational status and errors in any
function in the controls/engine.
AB C D E F
A. Footswitch - This light illuminates when
footswitch is depressed. A 15-second
anti-tiedown feature deactivates footswitch
when operator depresses it for 15 seconds
without activating any function.
B. Chassis Tilt - This light illuminates when
the MEWP chassis is at an inclination that
activates the tilt sensor. At this inclination, an
audible alarm will sound at the platform. Refer
to Section 3.11 for instructions regarding
recovery from an inclined position.
C. Overload Light - This red light indicates
overload status. Refer to Section 2.2-7.
D. Engine - This light indicates failure in engine
control system.
E. Fuel - This light indicates low fuel level.
F. Glow Plug (Diesel) - This light illuminates
until glow plugs have completed their timed
cycle. When the lamp goes out, the engine is
ready to be started.
4. Emergency Stop Button - This red “mushroom-
head” “ ” pushbutton disconnects power to
control circuit and shuts engine off.
5. Emergency Power Unit - This switch “ ”
enables emergency power unit.
6. Torque Switch - This switch selects low
or high torque. Select low torque
(higher speed) or high torque (lower
speed). Select high torque when driving
on a slope.
Figure 2-6. Platform Control Console
149432AA149432AA
At Platform Controls:
1. Pull out emergency stop button.
2. Depress and hold foot switch.
3. Activate emergency pump switch.
4. Activate desired boom function.
EMERGENCY LOWERING
PROCEDURE
245 6
1011 814
71
9121315
3
Control Functions Section 2 - Familiarization

SJ 46AJ & SJ 51AJ
December 2007 Page 19
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
7. Low/High Throttle Switch - This switch allows
selection between “ ” low and “ ” high
engine throttle speeds.
8. Drive/Steer Controller - This single-axis lever
controls driving “ ” forward or “ ” backward.
The rocker switch controls steering “ ” left or
“ ” right. Internal springs return it to neutral when
stick is released.
9. Differential Lock Switch - This momentary switch,
when pushed forward and then released, engages
“ ” differential lock and turns differential light
on. When pulled backward and then released,
disengages “ ” differential lock and turns
differential light off.
10. Jib Up/Down Switch - This switch controls
“ ” up or “ ” down movement of jib.
11. Fly Boom Extend/Retract Switch - This switch
controls “ ” extension or “ ” retraction
of y boom.
12. Riser Raise/Lower Controller - This single-axis
lever controls “ ” raising or “ ” lowering
of riser.
13. Platform Leveling Override Switch - This switch
overrides automatic leveling of platform and
controls “ ” tilting up or “ ” tilting
down of platform.
14. Platform Rotation Switch - This switch controls
“ ” left or “ ” right rotation of platform.
15. Boom/Turret Controller - This dual-axis lever
controls “ ” raising or “ ” lowering of
main boom or rotating “ ” left or “ ” right of
turret.
2.2-9 Platform Control Console (Continued)
Figure 2-6. Platform Control Console
149432AA149432AA
At Platform Controls:
1. Pull out emergency stop button.
2. Depress and hold foot switch.
3. Activate emergency pump switch.
4. Activate desired boom function.
EMERGENCY LOWERING
PROCEDURE
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Section 2 - Familiarization Control Functions

Page 20 December 2007
SJ 46AJ & SJ 51AJ
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the MEWP.
FAMILIARIZATION
2.3 Visual & Daily Maintenance Inspections
Begin the visual and daily maintenance inspections
by checking each item in sequence for the conditions
listed in this section.
WARNING
To avoid injury, do not operate an MEWP
until all malfunctions have been corrected.
WARNING
To avoid possible injury, ensure MEWP
power is off during your visual and daily
maintenance inspections.
CAUTION
Ensure MEWP is on a rm, level
surface.
NOTE
While doing visual and daily inspections
in different areas, be aware to also inspect
limit switches, electrical and hydraulic
components.
2.3-1 Labels
Refer to Section 5 - Labels in this manual and determine
that all labels are in place and are legible.
2.3-2 Electrical
Maintaining the electrical components is essential to
good performance and service life of the MEWP.
Inspect the following areas for chafed, corroded
and loose wires:
• boom to platform cable harness
• engine compartment electrical panel
• engine wiring harness
• rotary manifold wiring
2.3-3 Limit Switches
Ensure limit switches are properly secured with no signs
of visible damage and movement is not obstructed.
2.3-4 Hydraulic
Maintaining the hydraulic components is essential to
good performance and service life of the MEWP.
Perform a visual inspection around the following
areas:
• hydraulic tank lter, ttings, hoses, emergency
power unit and turret/base surface
• engine compartment ttings, hoses, main
pump, lter and turret/base surface
• all hydraulic cylinders
• all hydraulic manifolds
• underside of the turret
• underside of the base
• ground area under the MEWP
Platform
Railing
Footswitch
Platform Control
Console
Manual Box
Platform
Assembly
Visual & Maintenance Inspection Section 2 - Familiarization