Unit 1 Maes Y Clawdd
Maesbury Road Industrial Estate
Oswestry, Shropshire SY10 8NN UK
Phone: +44-1691-676-235
Fax: +44-1691-676-238
E-mail: [email protected]
Skyjack Brasil
Alameda Júpiter, 710
Loteamento American Park Empresarial
Indaiatuba, SP, Brasil 13347-653
Tel: +55 19 3936 0132
Page 3
SERVICE AND MAINTENANCE
Table of Contents
Section 1 - Scheduled Maintenance Inspections
Table of Contents
Section 2 - Maintenance Tables
Table of Contents
Section 3 - Schematics
Table of Contents
Section 4 - Troubleshooting
Table of Contents
Section 5 - Procedures
Table of Contents
SKYJACK, Page 3SJIII Series
Page 4
The Safety Alert Symbol identifies important
safety messages on aerial platforms, 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.
DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
This Safety Alert Symbol means attention!
Become alert! Your safety is involved.
DANGER
WARNING
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.
Purpose of Equipment .................................................................................................................................................7
Use of Equipment ........................................................................................................................................................7
Service Policy and Warranty ........................................................................................................................................7
Scope of this Manual ...................................................................................................................................................8
Maintenance and Inspection Schedule .....................................................................................................................13
Owner’s Annual Inspection Record ...........................................................................................................................13
Replacement Parts .....................................................................................................................................................13
Maintenance and Service Safety Tips .......................................................................................................................13
Hydraulic System & Component Maintenance and Repair ......................................................................................14
About this Section ......................................................................................................................................................15
Service Bulletins .........................................................................................................................................................15
Maintenance and Inspection .....................................................................................................................................15
1.2 Function Tests..................................................................................................................................................25
Tables
1.1 Owner’s Annual Inspection Record ................................................................................................................16
1.2 Maintenance and Inspection Checklist ...........................................................................................................17
SKYJACK, Page 5SJIII Series
Page 6
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
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 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. It can be driven over uneven terrain only when the platform is fully lowered.
Manuals
Operating
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.
Service & Maintenance
The purpose of this is to provide the customer with the servicing and maintenance procedures essential for
the promotion of proper machine operation for its intended purpose.
All information in this manual should be read and understood before any attempt is made to service the machine.
The updated copy of the manuals are found on the company’s website: www.skyjack.com.
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 of the operating manual. Operating instructions for these options (if equipped)
are located in section 2 of the operating manual.
For non-standard components or systems, contact the SKYJACK Service Department at
North America & Asia: Europe:
(: 800 275-9522 (: 44 1691-676-235
7: 630 262-0006 7 : 44 1691-676-239
Include the model and serial number for each applicable aerial platform.
SKYJACK, Page 7SJIII Series
Page 7
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
Scope of this Manual
a. This manual applies to the ANSI/SIA, CSA and CE versions of the SJIII Series 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.
- Equipment identified with “CE” meets the requirements for the European countries, i.e., Machinery
Directive 98/37/EC and EMC Directive 89/336/EEC and the corresponding EN standards.
b. CSA (Canada) and CE (Europe)
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 8SJIII Series
Page 8
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
CE Guidance Note
“Avoidance of danger from overhead lines”
Voltage RangeMinimum Safe Approach Distance
(Phase to Phase)(Feet)
0 to 300VAvoid Contact
Over 300V to 50KV10
Over 50KV to 200KV15
Over 200KV to 350KV20
Over 350KV to 500KV25
Over 500KV to 750KV35
Over 750KV to 1000KV45
60023AD
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
and CSA B354.2-01 Requirements
Adhere strictly to the governmental rulings
and regulations applicable in your country.
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 Inc.
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 AERIAL PLATFORM AS A GROUND FOR WELDING.
DO NOT OPERATE AERIAL PLATFORM DURING LIGHTNING OR STORMS.
SKYJACK, Page 9SJIII Series
Page 9
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.
• TURN 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
lift.
• AVOID entanglement with
ropes, cords or hoses.
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
• 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
• AVOIDfalling. Stay within the
boundaries of the guardrails.
be done on a firm level surface.
• DO NOT ascend or descend
a grade when elevated. When
• DO NOT raise the aerial plat-
form in windy or gusty conditions.
fully lowered, ascending or
descending, only grades up
to rated maximum listed in
Tables 2-3 are permissible.
SKYJACK, Page 10SJIII Series
Page 10
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
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 oper ate an aerial
platfo r m that has ladde r s,
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 raise the aerial platform
while the aerial platform is on a
truck, fork lift or other device or
vehicle.
• BE AWARE of crushing hazards.
Ke e p all body parts inside
platform guardrail.
• DO NOT lower the platform
unless the area below is
clear of pe r s o nnel and
obstructions.
• ENSURE that there are no personnel or obstructions
in the path of travel, including blind spots.
• DO NOT sit, stand or climb on
the guardrails. It is prohibited.
• DO NOT climb on scissor arm
assembly. It is prohibited.
• BE AWARE o f o ve r hea d
obstructions or other possible
hazar d s around th e aerial
platform when driving or lifting.
• 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.
SKYJACK, Page 11SJIII Series
Page 11
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
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 insp ected 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.
the platform. Enter and exit the platform from
the ground only. Face the aerial platform when
entering or exiting the platform.
• Threepointsofcontactmeansthattwohands
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 re-
sult 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.
SKYJACK, Page 12SJIII Series
Page 12
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
Maintenance and Inspection Schedule
The actual operating environment of the work platform
governs the use of the maintenance schedule. The
inspection points covered in Table 1.2. Maintenance
and lnspection Checklist, indicates the areas of the
aerial platform to be maintained or inspected and at
what intervals the maintenance and inspections are to
be performed.
Owner’s Annual Inspection Record
It is the responsibility of the owner to arrange quarterly
and annual inspections of the aerial platform. Table 1.1.
Owner’s Annual lnspection Record is to be used for
recording the date of the inspection, owner’s name,
and the person responsible for the inspection of the
work platform.
Replacement Parts
Use only original replacement parts. Parts such
as batteries, wheels, railings, etc. with weight and
dimensions different from original parts will affect
stability of the aerial platform and must not be used
without manufacturer’s consent.
All replacement tires must be of the same size and load
rating as originally supplied tires; to maintain safety and
stability of aerial platform.
Consult SKYJACK’s Service Department for optional
tires specifications and installation.
WARNING
Any unit that is damaged or not operating
properly must be immediately tagged and
removed from service until proper repairs
are completed.
Maintenance and Service Safety Tips
Maintenance and repair should only be performed by
personnel who are trained and qualified to service this
aerial platform.
All maintenance and service procedures should be
performed in a well lighted and well ventilated area.
Anyone operating or servicing this aerial platform
must read and completely understand all operating
instructions and safety hazards in this manual and
operating manual.
All tools, supports and lifting equipment to be used
must be of proper rated load and in good working order
before any service work begins. Work area should be
kept clean and free of debris to avoid contaminating
components while servicing.
All service personnel must be familiar with employer
and governmental regulations that apply to servicing
this type of equipment.
Keep sparks and flames away from all flammable or
combustible materials.
Properly dispose of all waste material such as lubricants,
rags, and old parts according to the relative law
provisions obtaining in the country.
Before attempting any repair work, turn Battery
Disconnect Switch to the “OFF” position.
Preventive maintenance is the easiest and least
expensive type of maintenance.
SKYJACK, Page 13SJIII Series
Page 13
Section 1 - Scheduled MaintenanceOperator’s Responsibility for Maintenance
Hydraulic System & Component
Maintenance and Repair
The following points should be kept in mind when
working on the hydraulic system or any component:
1. Any structure has limits of strength and durability.
To prevent failure of structural parts of hydraulic
components, relief valves which limit pressure to
safe operating values are included in the hydraulic
circuits.
2. Tolerance of working parts in the hydraulic system
is very close. Even small amounts of dirt or foreign
materials in the system can cause wear or damage
to components, as well as general faulty operation
of the hydraulic system. Every precaution must
be taken to assure absolute cleanliness of the
hydraulic oil.
3. Whenever there is a hydraulic system failure
which gives reason to believe that there are metal
particles or foreign materials in the system, drain
and flush the entire system and replace the filter
cartridges. A complete change of oil must be
made under these circumstances.
4. Whenever the hydraulic system is drained, check
the magnets in the hydraulic reservoir for metal
particles. If metal particles are present, flush the
entire system and add a new change of oil. The
presence of metal particles also may indicate the
possibility of imminent component failure. A very
small amount of fine particles is normal.
5. All containers and funnels used in handling
hydraulic oil must be absolutely clean. Use a
funnel when necessary for filling the hydraulic oil
reservoir, and fill the reservoir only through the
filter opening. The use of cloth to strain the oil
should be avoided to prevent lint from getting into
the system.
6. When removing any hydraulic component, be sure
to cap and tag all hydraulic lines involved. Also,
plug the ports of the removed components.
NOTE
Samples of hydraulic oil should be drawn
from the reservoir and tested annually.
These samples should be taken when the
oil is warmed through normal operation of
the system. The sample should be analyzed
by a qualified lubrication specialist to
determine if it is suitable for continued use.
Oil change intervals will depend on the
care used in keeping the oil clean, and the
operating conditions. Dirt and/or moisture
cotamination will dictate that the oil should
be changed more often. Under normal use
and operating conditions, the hydraulic oil
should be changed every two years. Refer
to Table 1.2 of this manual.
7. All hydraulic components must be dis-assembled
in spo t l e s s ly cl e a n surr o u n d ings. Du ring
disassembly, pay particular attention to the
identification of parts to assure proper reassembly.
Clean all metal parts in a clean mineral oil solvent.
Be sure to thoroughly clean all internal passages.
After the parts have been dried thoroughly, lay
them on a clean, lint-free surface for inspection.
8. Replace all O-rings and seals when overhauling
any component. Lubricate all parts with clean
hydraulic oil before reassembly. Use small
amounts of petroleum jelly to hold O-rings in place
during assembly.
9. Be sure to replace any lost hydraulic oil when
comple ting the installation of the repaired
component, and bleed any air from the system
when required.
10. All hydraulic connections must be kept tight. A
loose connection in a pressure line will permit
the oil to leak out or air to be drawn into the
system. Air in the system can cause damage
to the components and noisy or erratic system
operation.
Maintenance Hints
Three simple maintenance procedures have the
greatest effect on the hydraulic system performance,
efficiency and life. Yet, the very simplicity of them may
be the reason they are so often overlooked. What are
they? Simply these:
Change filters annually. The filters will need 1.
to be changed more often depending on
the operating conditions. Dirty, dusty, high
mo isture environments may cause the
hydraulic system to be contaminated more
quickly.
Maintain a sufficient quantity of clean hydraulic 2.
oil of the proper type and viscosity in the
hydraulic reservoir.
Keep all connections tight.3.
SKYJACK, Page 14SJIII Series
Page 14
Section 1 - Scheduled MaintenanceService and Maintenance
About this Section
This section contains the maintenance and inspection
schedule that is to be performed.
References are made to the procedures in Section 5
that outline detailed step-by-step instructions for checks
and replacements.
Service Bulletins
Before performing any scheduled maintenance
inspection procedure, refer to service bulletins found in
our web site: www.skyjackinc.com for updates related
to service and maintenance of this aerial platform.
Maintenance and Inspection
Death or injury can result if the aerial platform is not kept
in good working order. Inspection and maintenance
should be performed by competent personnel who
are trained and qualified on mantenance of this aerial
platform.
WARNING
Failure to perform each procedure as presented and scheduled may cause death,
serious injury or substantial damage.
Maintenance Instructions
This manual consists of four schedules to be done for
maintaining on an aerial platform. Inspection schedule
frequency is shown below:
Inspection Schedule
Daily A
Frequently A + B
Annually A + B + C
Bi-annually A + B + C + D
Make copies of the maintenance and inspection •
checklist to be used for each inspection.
aerial platform from service.
If any aerial platform component(s) has been •
repaired, an inspection must be performed again
before removing the tag. Place a check in the repair
column.
NOTE
Preventive maintenance is the easiest and
least expensive type of maintenance.
• Unless o t herwise specified, p erform e a ch
maintenance procedure with the aerial platform in
the following configuration:
- Aerial platform parked on a flat and level
surface
- Disconnect the battery by turning the main
power disconnect switch to the “OFF” position.
• Repairanydamagedormalfunctioncomponents
before operating aerial platform.
• Keeprecordsonallinspections.
Legend
P = Pass
F = Fail
R = Repaired
SKYJACK, Page 15SJIII Series
Page 15
Section 1 - Scheduled MaintenanceService and Maintenance
Recording
Date
Recording
Year #
Owner’s
Name
Inspected
By
60564AA
As described earlier in this section, this decal is located on the control compartment cowling. It must be completed after an annual
inspection has been completed. Do not use the aerial platform if an inspection has not been recorded in the last 13 months.
546791238
Model Number: ____________________________Serial Number: ____________________________
Table 1.1 Owner’s Annual Inspection Record
SKYJACK, Page 16SJIII Series
Page 16
Section 1 - Scheduled MaintenanceService and Maintenance
Serial Number:
Model:
Hourmeter Reading:Name (Printed):
Date:
Time:Signature:
INSPECTION FREQUENCY
DAILY
P- PASSFREQUENTLY
F- FAIL
A
NNUALLY
R
- REPAIREDBI-ANNUALLY
PFRPFR
Maintenance Support
Scissor Assembly
111AD
A - Perform Visual and Daily Maintenance Inspections & Functions Test. Refer to Section 2.7 of the Operating Manual.
B - Perform Scheduled Maintenance Inspection every three months or 150 hrs. Refer to Section 1 of this manual.
C - Perform Scheduled Maintenance Inspection every year. Refer to Section 1 of this manual.
D - Perform Scheduled Maintenance Inspection every 2 years. Refer to Section 1 of this manual.
* Perform scheduled inspection every three months or 150 hours.
† - Refer to Skyjack's website @ www.skyjack.com for latest service bulletins porior to performing quarterly or yearly inspection.
Note: Make a copy of this page or visit the Skyjack web site:www.skyjack.com for a printable copy.
Load/Tilt Sensor - CE
Free-wheeling Valve Knob
(Compacts - Front Side)
A, B
Hydraulic Tank
Hydraulic/Electric Tray Side
Pothole Protection Device
Battery Tray
A, B
A, B
Annually†A + B + C
Bi-annually†
A, BTest Emergency Lowering
Test Main Power Discconect Switch
Rollers
Lift Cylinder(s)A, B
DailyA
Frequently*†
A + B
Table 1.2 MAINTENANCE AND INSPECTION CHECKLIST
Each item shall be inspected using the the appropriate section of the Skyjack operating manual.
As each item is inspected, write the apropriate grade in the box.
Inspection Schedule
A, B, C
A + B + C + D
ScheduleSchedule
Schedule Maintenance Inspections
Base Control Switches
LabelsA
Platform Assembly
Lanyard Attachment AnchorsA, B
A, B
A, B
Test Free-wheeling
A, B
A, B
A, B
Test Off/Platform/Base
A, B
A, B, C
A, B
Entrance Side
ManualsA, BMain Power Disconnect SwitchA, B
Limit SwitchesA, B
A, B
A, B
A, B
A, B
A, B
A, B
A, B
A, B
A, B
A, B
Wheel/Tire Assembly
Tie Rod (Conventionals)
A, B
Brakes
AC Outlet Receptacle
Ladder
Battery Tray Side
A, B
A, B
A, B
Test Tilt Sensor - ANSI/CSA
Test Enable Trigger Switch
Test Steering
Test Driving
Test Brakes
Test Platform Raising/Lowering
Test Lowering Warning - CE
Test Horn
Test Pothole Sensor
Test Elevated Drive Speed
Tilt Sensor - ANSI/CSA
Greasing Points
Electrical Panel
A, B, C
A, B
A, B
A, B
A, B, CHydraulic Oil
Proportional and Main Manifolds
A, B
A, B
A, B
Emergency Lowering Access Rod
(If Equipped)
A, B
Battery
Pothole Protection Device
Hydraulic Pump and Motor
Battery Charger
Steer Cylinder Assembly
A, B
AC Outlet on PlatformA, B
Platform Control ConsoleA, B
Powered Extension Control Console
(If Equipped)
A, B
Lift Mechanism
Scissor BumpersA, B
Test Lower/Neutral/Raise SwitchA, B
Test Base Emergency Stop
Platform Control Console
Test Platform Emergency StopA, B
A, B
A, B
A, B
Function Tests
Base Control Console
SKYJACK, Page 17SJIII Series
Page 17
High Speed
Limit Switch
Section 1 - Scheduled MaintenanceService and Maintenance
High Speed
Limit Switch
Pothole Protection
Limit Switch
1.1 Scheduled Maintenance Inspections
Begin the scheduled maintenance inspections by
checking each item in sequence for the conditions listed
in this section.
WARNING
To avoid injury, do not operate an aerial
platform until all malfunctions have been
corrected.
WARNING
To avoid possible injury, ensure aerial
platform power is off during your visual
and daily maintenance inspections.
Electrical
Maintaining the electrical components is essential
to good performance and service life of the aerial
platform.
Inspect the following areas for chafed, corroded and
loose wires:
• basetoplatformcablesandwiringharness
• batterytraywiringharnesses
• hydraulic/electricalwiringharnesses
Hydraulic
Maintaining the hydraulic components is essential
to good performance and service life of the aerial
platform.
Perform a visual inspection around the following
areas:
hoses and fittings•
all hydraulic cylinders•
all hydraulic manifolds•
the underside of the base•
ground area under the aerial platform•
1.1-1 Labels
Refer to the labels section in this manual and determine
that all labels are in place and are legible.
1.1-2 Limit Switches
Detecting limit switch malfunction is essential to safe
aerial platform operation. Ensure limit switches are
properly secured and movement is not obstructed.
Visually inspect all limit switch located inside the scissor
arms and the outrigger assemblies for the following:
• brokenormissingactuatorarm
• missingfasteners
• loosewiring
SKYJACK, Page 18SJIII Series
Page 18
Section 1 - Scheduled MaintenanceService and Maintenance
Compact
1.1-3 Entrance Side
Main Power Disconnect Switch •
Turn emergency main power disconnect -
switch to “” off position.
Ensure all cables are secure and switch -
is in proper working condition.
Ladder
110V Outlet
Receptacle
Base
Control Console
Free-wheeling
Valve
Brakes
Free-wheeling
Valve
Brakes
Ladder
AC Outlet Receptacle•
Ensure receptacle is free from dirt and -
obstructions.
Ladder•
Ensure there are no loose or missing -
parts and there is no visible damage.
Emergency Main
Power
Disconnect
Switch
110V Outlet
Receptacle
Conventional
(Back View)
Compact
(Back View)
Base Control Switches•
Ensure there are no signs of visible -
damage and all switches are in their
neutral positions.
Free-wheeling Valve Knob•
(Compacts - Front Side)
Ensure there are no loose or missing -
parts and there is no visible damage.
Brakes•
Ensure there are no loose or missing -
parts and there is no visible damage.
Ensure tabs are not locked. -
SKYJACK, Page 19SJIII Series
Page 19
Section 1 - Scheduled MaintenanceService and Maintenance
ConventionalCompact
Battery
Charger
Battery Tray
1.1-4 Battery Tray Side
Pothole Protection Device•
Battery Tray•
Battery Charger •
(Compacts - Entrance Side)
Battery
Ensure mechanisms have no sign of -
visible damage and are free from dirt and
obstructions.
Ensure tray latch is secure and in proper -
working order.
Ensure charger is secure and shows no -
visible damage.
Fuse Box
Hydraulic/Electric
Tray
Battery
Charger
Pothole Protection Device
Battery acid is extremely corrosive
- Wear proper eye and facial protection as well as appropriate protective
clothing. If contact occurs, immediately flush with cold water and seek
medical attention.
1. Check battery case for damage.
2. Clean battery terminals and cable ends
thoroughly with a terminal cleaning tool
or wire brush.
Battery Tray
WARNING
Battery
Battery•
Proper battery condition is essential to
good performance and operational safety.
Improper fluid levels or damaged cables and
connections can result in component damage
and hazardous conditions.
WARNING
Explosion hazard. Keep flames
and sparks away. Do not smoke
near batteries.
SKYJACK, Page 20SJIII Series
3. Ensure all battery connections are tight.
4. If applicable, check battery fluid level. If
plates are not covered by at least 1/2”
(13 mm) of solution, add distilled or
demineralized water.
5. Replace battery if damaged or incapable
of holding a lasting charge.
WARNING
Use original or manufacturer-approved
parts and components for the aerial
platform.
Page 20
Section 1 - Scheduled MaintenanceService and Maintenance
Conventional
Wheel/Tire
Steer Cylinder
Wheel/Tire
Greasing Point
Tie RodWheel Motor
Steer Cylinder Assembly•
Ensu r e st e e r cy l i nder assembly is -
properly secured and there are no loose
or missing parts.
Wheel/Tire Assembly•
The aerial platform is either equipped with
solid rubber tires or foam-filled tires. Tire
and/or wheel failure could result in an aerial
platform tip-over. Component damage may
also result if problems are not discovered and
repaired in a timely fashion.
Check all tire treads and sidewalls for -
cuts, cracks, punctures and unusual
wear.
Check each wheel for damage and -
cracked welds.
Check each lug nut for proper torque to -
ensure none are loose.
Check wheel motor assembly for loose -
or missing parts and signs of visible
damage.
Tie Rod (Conventionals)•
Ensure there are no loose or missing -
parts, tie rod end studs are locked and
there is no visible damage.
Greasing Points•
Ensure greasing points have no sign of -
visible damage and are free from dirt and
obstructions.
B - Frequent Inspection
Locate grease fittings and pump grease -
as needed.
Ensure wheels are aligned and true -
vertically and horizontally.
SKYJACK, Page 21SJIII Series
Page 21
Section 1 - Scheduled MaintenanceService and Maintenance
Compact
Emergency Lowering
Access Rod
Greasing Point
1.1-5 Hydraulic/Electric Tray Side
Ensure tray latch is secure and in proper -
working order.
Tilt Sensor
Greasing Point
Electrical Panel
Hydraulic/Electric
Tray
Main Manifold
Hydraulic Tank
Electrical Panel •
Ensure panel is properly secured and -
there is no visible damage.
Pothole Protection Device•
Ensure mechanisms have no sign of -
visible damage and are free from dirt and
obstructions.
Hydraulic Tank •
Ensure hydraulic filler cap is secure. -
Ensure tank shows no visible damage -
and no evidence of hydraulic leakage.
Hydraulic Oil•
Ensure platform is fully lowered, and then -
visually inspect the sight gauge located
on the side of the hydraulic oil tank.
The hydraulic oil level should be at or -
slightly above the top mark of the sight
glass.
C - Annual Inspection
For hydraulic oil replacement procedure, -
refer to section 5.
Hydraulic Pump and Motor •
Ensure there are no loose or missing -
parts and there is no visible damage.
Ensure there are no loose wires or -
missing fasteners.
Proportional and Main Manifolds•
Ensure all fittings and hoses are properly -
tightened and there is no evidence of
hydraulic leakage.
Ensure there are no loose wires or -
missing fasteners.
Tilt Sensor - ANSI/CSA•
Ensure tilt sensor is properly secured and -
there is no visible damage.
Load/Tilt Sensor - CE•
Ensure load/tilt sensor is properly secured -
and there is no visible damage.
Emer g enc y Lower i ng Acce s s Ro d •
(If Equipped)
Ensure rod is properly secured and there -
is no visible damage.
SKYJACK, Page 22SJIII Series
Page 22
Section 1 - Scheduled MaintenanceService and Maintenance
Platform Control Console
Platform
Manual Storage
Box
Platform
Assembly
Railing
Lanyard
Attachment
Anchor
1.1-6 Platform Assembly
WARNING
Ensure that you maintain three points of
contact to mount/dismount platform.
1. Use the ladder of aerial platform to access
platform.
2. Close the gate.
Ensure there are no loose or missing -
parts and there is no visible damage.
Ensure all fasteners are securely in -
place.
Ensure all railings are properly positioned -
and secured.
Ensure gate is in good working order. -
Lanyard Attachment Anchors•
Ensure attachment rings are secure and -
no visible damage.
Platform Control Console•
Ensure all switches and controller are -
returned to neutral and are properly
secured.
Ensure there are no loose or missing -
parts and there is no visible damage.
Manuals•
Ensure a copy of operating manual and other
important documents are enclosed in manual
storage box.
Check to be sure manual storage box is -
present and in good condition.
Ensure manuals are legible and in good -
condition.
Always return manuals to the manual -
storage box after use.
AC Outlet on Platform•
Ensure outlet has no visible damage and -
free from dirt or obstructions.
SKYJACK, Page 23SJIII Series
Page 23
Lift Cylinder
Section 1 - Scheduled MaintenanceService and Maintenance
Maintenance
Support
Scissor Assembly
Powered Extension Control Console •
(If Equipped)
Ensure all switches are returned to
-
neutral and are properly secured.
Ensure there are no loose or missing -
parts and there is no visible damage.
WARNING
Ensure that you maintain three points of
contact to mount/dismount platform.
3. Use the ladder to dismount from platform.
1.1-7 Lifting Mechanism
1. Raise the platform until there is adequate clearance
to swing down the maintenance support.
Scissor Bumper
Roller
Scissor Bumpers•
Ensure bumpers are secure and shows -
no sign of visible damage.
Rollers•
Ensure rollers are secure and there is no -
visible damage.
Ensure rollers’ path of travel are free from -
dirt and obstructions.
Lift Cylinder(s)•
Ensure each lift cylinder is properly -
secured, there are no loose or missing
parts and there is no ev idence of
damage.
Ensure all fittings and hoses are properly -
tightened and there is no evidence of
hydraulic leakage.
Maintenance Support•
Ensure maintenance support is properly -
secured and shows no visible damage.
Scissor Assembly•
Ensure scissor assembly shows no visible -
damage and no signs of deformation in
weldments.
Ensure all pins are properly secured. -
Ensure cables and wires are properly -
routed and shows no signs of wear and/
or physical damage.
SKYJACK, Page 24SJIII Series
2. Raise the platform until there is adequate clearance
to swing up the maintenance support.
3. Swing up maintenance support into storage
bracket.
4. Fully lower the platform.
Page 24
Section 1 - Scheduled MaintenanceFunction Tests
Conventional
(Back View)
Free-wheeling
Valve
Lower/
Neutral/Raise
Switch
Emergency Stop
Button
1.2 Function Tests
Function tests are designed to discover any malfunctions
before aerial platform is put into service. The operator
must understand and follow step-by-step instructions
to test all aerial platform functions.
WARNING
Never us e a malfuncti o n i ng ae r i al
platform. If malfunctions are discovered,
aerial platform must be tagged and
placed out of service. Repairs to aerial
platform may only be made by a qualified
service technician.
After repairs are completed, operator must perform a
pre-operation inspection and a series of function tests
again before putting aerial platform into service.
Prior to performing function tests, be sure to read
and understand Section 2.10 - Start Operation of the
operating manual.
Compact
(Back View)
Lower/
Neutral/Raise
Switch
Platform/Off/Base
Key Switch
1.2-2 Base Control Console
Ensure that you maintain three points of
contact when using the ladder to mount/
dismount platform.
1. Use the ladder of aerial platform to access
platform.
2. Close the gate.
3. On platform control console, pull out “
emergency stop button.
4. Use the ladder to dismount from platform.
5. Turn main power disconnect switch to “ ” on
position.
Emergency Stop
Button
WARNING
”
1.2-1 Test Main Power Disconnect Switch
1. At rear of the base, turn main power disconnect
switch to “” off position.
Result: Aerial platform functions should not
operate.
SKYJACK, Page 25SJIII Series
Page 25
Section 1 - Scheduled MaintenanceFunction Tests
Conventional
(Back View)
Platform
Raise/Lower
Switch
Test Base Emergency Stop•
1. Push in “
attempt to raise or lower the platform.
Result: Platform raising and lowering
functions should not operate.
2. Pull out base “
button.
Test Off/Platform/Base Switch•
1. Se lect off/ platform /base ke y switch
“” off position. Attempt to raise or lower
the platform.
Result: Platform raising and lowering
functions should not operate.
Emergency Stop
Button
” emergency stop button and
” emergency stop
WARNING
Be aware of overhead obstructions
or other possible hazards around the
aerial platform when lifting.
Free-wheeling
Valve
Platform
Raise/Lower
Switch
Platform/Off/Base
Key Switch
Compact
(Back View)
Emergency Stop
Button
3. Select and hold off/platform/base key
switch to “
to raise or lower the platform.
Result: Platform raising and lowering
functions should operate.
Test Lower/Neutral/Raise Switch•
1. Select and hold off/platform/base key
switch to “
” raise the platform with lower/neutral/
“
raise switch.
Result: Platform should rise.
2. Select and hold off/platform/base key
switch to “
“
” lower the platform with lower/
neutral/raise switch.
Result: Platform should lower.
” base position. Attempt
” base position and
” base position and
2. Select off/platform/base key switch to “
platform position. Attempt to raise or lower
the platform.
Result: Platform raising and lowering
functions should not operate.
SKYJACK, Page 26SJIII Series
”
Page 26
Section 1 - Scheduled MaintenanceFunction Tests
Conventional
(Back View)
Lower/
Neutral/Raise
Switch
Test Emergency Lowering•
1. Raise the platform.
Emergency Stop
Button
Free-wheeling
Valve
Lower/
Neutral/Raise
Switch
Platform/Off/Base
Key Switch
Compact
(Back View)
Emergency Stop
Button
Test Free-wheeling•
1. Ensure path of intended motion is clear.
2. Locate holding valve manual override
knob at the base of each lift cylinder.
Depress and turn counterclockwise. If
necessary, use access rod that is located
on the base of the aerial platform.
3. On hydraulic/electric tray, pull out and
hold emergency lowering valve to fully
lower the platform.
Result: The platform should lower.
4. To restore normal operation, depress and
turn holding valve manual override knobs
clockwise.
2. Release the brake manually.
3. Tu rn f r e e - w h e el in g va lv e k no b
co untercl ockwise to a fully opened
position and attempt to push/pull the aerial
platform.
Result: Platform should move.
4. Turn free-wheeling valve knob clockwise
to a fully closed position for normal
operation.
5. Reengage the brake.
SKYJACK, Page 27SJIII Series
Page 27
Section 1 - Scheduled MaintenanceFunction Tests
Lift/Drive/Steer Enable
Trigger Switch
Inclined Drive/Level Drive
Switch
Lift/Off/Drive Switch
Platform Control Console with Toggle SwitchPlatform Control Console with Rotary Switch
1.2-3 Platform Control Console
1. Ensure base “
pulled out.
2. Select off/platform/base key switch to “
platform position.
3. Ensure main power disconnect switch is in “ ” on
position.
Ensure that you maintain three points of
contact when using the ladder to mount/
dismount platform.
” emergency stop button is
WARNING
Rocker Switch
Controller
Emergency Stop Button/
Operation Light
Horn Pushbutton
”
Lift/Drive/Steer Enable
Trigger Switch
Lift/Inclined Drive/Level Drive Switch
Test Platform Emergency Stop•
1. Push in “
and attempt to activate any platform
function.
Result: All selected platform functions
should not operate.
Test Enable Trigger Switch•
1. Without activating “
switch, attempt to activate any platform
function.
Result: All platform functions should not
operate.
Rocker Switch
Emergency Stop Button/
Operation Light
Horn Pushbutton
” emergency stop button
” enable trigger
4. Use the ladder of aerial platform to access
platform.
5. Close the gate.
6. On platform control console, pull out “
”emergency stop button.
SKYJACK, Page 28SJIII Series
Page 28
Section 1 - Scheduled MaintenanceFunction Tests
Lift/Drive/Steer Enable
Trigger Switch
Inclined Drive/Level Drive
Switch
Lift/Off/Drive Switch
Platform Control Console with Toggle SwitchPlatform Control Console with Rotary Switch
Test Steering•
NOTE
Inclined drive (low speed/high torque) is
not available on 3215 and 3219 models.
Rocker Switch
Controller
Emergency Stop Button/
Operation Light
Horn Pushbutton
Lift/Drive/Steer Enable
Trigger Switch
Lift/Inclined Drive/Level Drive Switch
Test Driving•
1. Ensure path of intended motion is clear.
Rocker Switch
Emergency Stop Button/
Operation Light
Horn Pushbutton
1. For platform control console with toggle
switch:
Select lift/off/drive switch to “
position.
For platform control console with rotary
switch:
Select lift/inclined drive/level drive switch
to either “
high torque) or “
speed/low torque) position.
2. Activate and hold “
switch.
3. Press rocker switch on top of controller
handle to “” left and “”
right.
Result: Steer wheels should turn left and
right.
” inclined drive (low speed/
” level drive (high
” enable trigger
” drive
2. Activate and hold “
switch.
3. Slo w ly m ov e co ntr ol l er h an d le i n
“
” forward direction until aerial platform
begins to move, and then return handle to
center position.
Result: Aerial platform should move in
forward direction, and then come to a
stop.
4. Slowly move controller handle in “
reverse direction until aerial platform begins
to move, and then return handle to center
position.
Result: Aerial platform should move in
reverse direction, and then come to a
stop.
”enable trigger
”
SKYJACK, Page 29SJIII Series
Page 29
Section 1 - Scheduled MaintenanceFunction Tests
Lift/Drive/Steer Enable
Trigger Switch
Inclined Drive/Level Drive
Switch
Lift/Off/Drive Switch
Platform Control Console with Toggle SwitchPlatform Control Console with Rotary Switch
Test Brakes•
WARNING
Brakes will engage instantly when you
release the controller handle, causing
aerial platform to stop immediately.
1. Ensure path of intended motion is clear.
Rocker Switch
Controller
Emergency Stop Button/
Operation Light
Horn Pushbutton
Lift/Drive/Steer Enable
Trigger Switch
Lift/Inclined Drive/Level Drive Switch
Result: Aerial platform should come to an
instant and abrupt stop. If aerial platform
does not stop immediately, or if aerial
platform pulls to one side while stopping,
do not operate aerial platform until brake
adjustments have been checked.
Test Platform Raising/Lowering•
Rocker Switch
Emergency Stop Button/
Operation Light
Horn Pushbutton
2. Activate and hold “
switch.
3. Drive aerial platform “
” backward. Test brake by releasing
“
controller handle.
Result: Aerial platform should come to
a stop. If aerial platform pulls to one side
while stopping, do not operate aerial
platform until brake adjustments have
been checked.
4. Drive aerial platform “
then “
by releasing “
only.
” backward. Test brake again
” enable trigger
” forward and then
” forward and
” enable trigger switch
WARNING
Be aware of overhead obstructions
or other possible hazards around the
aerial platform when lifting.
1. For platform control console with toggle
switch:
Select lift/off/drive switch to “
position.
For platform control console with rotary
switch:
Select lift/inclined drive/level drive switch
” lift position.
to “
2. Activate and hold “
switch.
” enable trigger
” lift
SKYJACK, Page 30SJIII Series
Page 30
Section 1 - Scheduled MaintenanceFunction Tests
ConventionalCompact
Pothole Protection
Device
3. Push controller handle and raise the
platform to an approximate height of
1 ft. (30.5 cm).
Result: Platform should rise.
4. Pull controller handle and lower the
platform fully.
Result: Platform should lower.
Test Lowering Warning - CE•
1. Raise the platform until approximately a
height of 3 to 4 meters is reached then
attempt to fully lower the platform.
Result: Platform should stop lowering at
a height of 2.5 meters high and an alarm
should sound.
2. Release controller handle.
Test Horn•
1. Push “
Result: Horn should sound.
” horn pushbutton.
Pothole Protection
Device
Test Pothole Sensor •
WARNING
Ensure that you maintain three points
of contact to mount/dismount plat-
form.
1. Use the ladder to dismount from platform
and pla c e a block , appro x i mat e l y
1.5” (3.75 cm), under the hydraulic/electric
tray.
2. Use the ladder of aerial platform to access
platform.
3. Close the gate.
4. Raise the platform until approximately a
height of 7 feet (2 meters) is reached and
attempt to drive forward or reverse.
Result: Aerial platform should not move
forward or backward.
5. Repeat the steps above with block placed
under battery tray.
Result: Aerial platform should not move
forward or backward.
SKYJACK, Page 31SJIII Series
Page 31
Section 1 - Scheduled MaintenanceFunction Tests
ConventionalCompact
Pothole Protection
Device
Test Elevated Drive Speed•
WARNING
Be aware of overhead obstructions
or other possible hazards around the
aerial platform when lifting.
1. Ensure path of intended motion is clear.
2. Raise the platform until approximately a
height of 7 feet (2 meters) is reached and
attempt to drive forward or reverse.
Result: Aerial platform should move slower
than when it was in stowed position.
Test Tilt Sensor - ANSI/CSA•
WARNING
Be aware of overhead obstructions
or other possible hazards around the
aerial platform when lifting.
Pothole Protection
Device
2. Use t he l ad der to d is m ou n t f r om
platform.
3. On base control console, slowly raise the
platform.
Result: When platform reach e s an
appropriate height, a warning signal
should sound and platform stop raising
as lift and drive controls should be
disabled.
WARNING
Ensure that there are no personnel
or obstructions in the path of travel,
including blind spots.
1. Move the aerial platform on to a slope not
greater than 4.5°.
SKYJACK, Page 32SJIII Series
Page 32
Section 2
MAINTENANCE TABLES AND DIAGRAMS
Table of Contents
Tables
2.1a Specifications and Features (ANSI/CSA) ..........................................................................................................2
2.1b Specifications and Features (CE) .....................................................................................................................4
2.1c Specifications and Features (AS) ......................................................................................................................6
Intermixing tires of different types or using tires of types other than those originally supplied with
this equipment can adversely affect stability. Therefore, replace tires only with the exact original
Skyjack-approved type. Failure to operate with matched approved tires in good condition may
result in death or serious injury.
SKYJACK, Page 8SJIII Series
Page 40
Section 2 - Maintenance Tables and DiagramsService and Maintenance
lb.kglb.kgpsi
KPa
(kN/m
2
)
psf
KPa
(kN/m2)
min*24001089960435100689.481607.66
max*300013611200544110758.422009.58
min*258011701032468100689.481708.14
max*313014201252568110758.4221010.05
min*340015421396633110758.421758.38
max*429919501936878130896.3224511.73
min*410018601644746120827.3721010.05
max*461020911844836130896.3223511.25
min*4100186016407441911316.901466.99
max*56202549225010212221530.641999.53
min*4700213218808532061420.321688.04
max*59202685237010752241544.4321010.05
min*5075230220309212081434.111808.62
max*57752620231010482231537.532059.82
60354AF-ANSI
*
**
NOTE:
MODEL
Total Aerial
Platform Weight
Total Aerial Platform Load
OUP**LCP**Wheel
OUP- Overall Uniform Pressure is a measure of the average load the aerial platform imparts on
the whole surface directly underneath it. The structure of the operating surface (beams, etc.) must
be able to withstand more than the indicated values above.
The LCP or OUP that an individual surface can withstand varies from structure to structure and is
generally determined by the engineer or architect for that particular structure.
min - Total aerial platform weight with no options
max - Aerial platform weight + all options + full capacity
LCP - Locally Concentrated Pressure is a measure of how hard the aerial platform presses on
the areas in direct contact with the floor. The floor covering (tile, carpet, etc.) must be able to
withstand more that the indicated values above.
3215
3220
4626
4632
4620
3226
3219
Table 2.2a Floor Loading Pressure (ANSI/CSA)
SKYJACK, Page 9SJIII Series
Page 41
Section 2 - Maintenance Tables and DiagramsService and Maintenance
WheelLCP**OUP**
kgkg
KPa (kN/m
2
)KPa (kN/m2)
min*1089435689.57.5
max*1361544758.59.5
min*1170468689.58.0
max*1420568758.510.0
min*1542616758.58.5
max*1950780896.511.5
min*1896746827.510.0
max*2091836896.511.5
min*19227441316.97.0
max*256810211530.69.5
min*21738531420.38.0
max*262710751544.410.1
min*23039211434.18.6
max*262010481537.59.8
60354AH-CE-R
*
max - Aerial platform weight + all options + full capacity
**
NOTE:
The LCP or OUP that an individual surface can withstand varies from structure to structure and is
generally determined by the engineer or architect for that particular structure.
4626
4632
min - Total aerial platform weight with no options
LCP - Locally Concentrated Pressure is a measure of how hard the aerial platform presses on the
areas in direct contact with the floor. The floor covering (tile, carpet, etc.) must be able to withstand
more that the indicated values above.
OUP- Overall Uniform Pressure is a measure of the average load the aerial platform imparts on the
whole surface directly underneath it. The structure of the operating surface (beams, etc.) must be able
to withstand more than the indicated values above.
MODEL
3219
4620
3215
Total Aerial
Platform
Weight
Total Aerial Platform Load
3220
3226
Table 2.2b Floor Loading Pressure (CE)
SKYJACK, Page 10SJIII Series
Page 42
Section 2 - Maintenance Tables and DiagramsService and Maintenance
WheelLCP**OUP**
kgkg
KPa (kN/m
2
)KPa (kN/m2)
min*1089435689.57.5
max*1361544758.59.5
min*1170468689.58.0
max*1420568758.510.0
min*1542633758.58.5
max*1950878896.511.5
min*1860746827.510.0
max*2091836896.511.5
min*18607441316.97.0
max*254910211530.69.5
min*21328531420.38.0
max*268510751544.410.1
min*23029211434.18.6
max*262010481537.59.8
60354AF-AS-S
*
**
NOTE:
Total Aerial
Platform
Weight
Total Aerial Platform Load
MODEL
3219
4620
4626
4632
3220
3226
3215
OUP - Overall Uniform Pressure is a measure of the average load the aerial platform imparts on the
whole surface directly underneath it. The structure of the operating surface (beams, etc.) must be able
to withstand more than the indicated values above.
The LCP or OUP that an individual surface can withstand varies from structure to structure and is
generally determined by the engineer or architect for that particular structure.
min - Total aerial platform weight with no options
max - Aerial platform weight + all options + full capacity
LCP - Locally Concentrated Pressure is a measure of how hard the aerial platform presses on the
areas in direct contact with the floor. The floor covering (tile, carpet, etc.) must be able to withstand
more that the indicated values above.
Dust is raised, paper whirls up, and small
branches sway.
5
8.0 – 10.828.8 – 38.926.25 – 35.518 – 24.25
Shrubs with leaves start swaying. Wave crests are
apparent in ponds or swamps.
6
10.8 – 13.938.9 – 50.035.5 – 45.524.5 – 31
Tree branches move. Power lines whistle. It is
difficult to open an umbrella.
7
13.9 – 17.250.0 – 61.945.5 – 65.531 – 38.5
Whole trees sway. It is difficult to walk against the
wind.
60338AC
Wind Speed
Ground Conditions
BEAUFORT
SCALE
Section 2 - Maintenance Tables and DiagramsService and Maintenance
Table 2.3b Maximum Platform Capacities (Evenly Distributed) (CE)
NOTE: Overall Capacity - Occupants and materials not to exceed rated load.
WARNING
The aerial is equipped with a Load Sensing System. Do not exceed the rated capacity of the aerial
platform. Failure to avoid this will prevent operation of all normal controls/functions of the aerial
platform. To resume normal operation remove the additional loads.
SKYJACK, Page 13SJIII Series
Page 45
4000227 kg2 Persons113 kg
20012.5227 kg1 Person227 kg
4000249 kg2 Persons113 kg
20012.5120 kg1 Person120 kg
4000408 kg2 Persons136 kg
20012.5227 kg1 Person227 kg
4000227 kg2 Persons113 kg
20012.5120 kg1 Person120 kg
462040012.5590 kg3 Persons136 kg1 Person590 kg3 Persons136 kg1 Person
462640012.5454 kg3 Persons136 kg1 Person454 kg3 Persons136 kg1 Person
Additional Torque Specifications may be found in Section 3.
60056AF
SKYJACK, Page 15
Page 47
Section 3
SYSTEM COMPONENT IDENTIFICATION AND SCHEMATICS
Table of Contents
Charts
3.1 Electrical Symbol Chart ..................................................................................................................................3
3.2 Hydraulic Symbol Chart ..................................................................................................................................4
3.3 Wire Number and Color Code ........................................................................................................................5
Parts List
3.4 Hydraulic Manifold and Port Identifications ....................................................................................................6
3.5 Hydraulic Schematic Parts List .......................................................................................................................7
3.6 Electrical Component Parts List .....................................................................................................................8
3.7a Platform Control Console Diagram (Toggle Switch) ....................................................................................11
3.7b Platform Control Console Diagram (Rotary Switch).....................................................................................12
3.8 Base Control Console Diagram ....................................................................................................................13
3.9 Scissor Arm Control Cable ...........................................................................................................................14
22PUR/GRN43WHT/YEL66 ORG/YEL 91 RED SHLD 118 PUR/PINK
RED/YEL/
BLK
35ORG/WHT58 WHT/PUR 81 GREY/BLK 109 GRN/YEL
WHT/RED/
BLK
60 WHT/BLU 83 BLU/GREY 110B BRN
GREY/
WHT
WHT/BLK/
PUR
108 YEL/BRN
111 GREY/GRN
This table is to be used as a wire number/color reference for all electrical drawings and schematics. All wire
numbers will retain their origional color coding, for example if wire 7 is red, wire 7A, 7B, and 7C will also be red.
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Page 51
To Left Wheel Motor
Upper Port
To Left Wheel Motor
Lower Port
To Main Manifold
3.4 Hydraulic Manifold and Port Identifications
MB2
Drive Manifold Block
2H-59
Proportional Valve
(Internal Compensator Valve)
MB2
Proportional
Manifold Block
To Main Manifold
To Right Wheel Motor
Upper Port
To Right Wheel Motor
Lower Port
To Drive
Service and MaintenanceSection 3 - System Component Identification and Schematics
To Main Manifold
To Pump
Deceleration Manifold
2H-13A (ANSI/CSA)
2H-13C (CE)
Deceleration Valve
2H-13 (ANSI/CSA)
2H-13B (CE)
Lowering Valve
4H-16
Forward Drive Valve
4H-15
Reverse Drive Valve
4H-24
Left Steering Valve
4h-23
Right Steering Valve
To Return Filter
To Drive
To Left Steering
MB10
(Model 3215)
To Cushion Manifold
To Lift Cylinder
To Right Steering
R2
Lift Relief Valve
MB5
Emergency Lowering
Manifold Block
3H-14
Lift Valve
CB1
Counterbalance Valve
2H-25
Cushion Valve
3H-17
Brake Valve
R1
System Relief Valve
To Proportional Valve
M10414AA M10561AC_1 M10589AA
SKYJACK, Page 6SJIII Compact Series
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Section 3 - System Component Identification and SchematicsService and Maintenance
4.1-1 All Controls Inoperative ...................................................................................................................................4
4.1-2 All Controls Except for Down Function Inoperative ......................................................................................4
4.1-3 All Controls Inoperative From Base Control Console ....................................................................................5
4.1-4 All Controls Inoperative From Platform Control Console ...............................................................................5
4.1-5 No Drive or Up Function from Platform or Base Controls (CE only) .............................................................5
4.1-6 No Down or Reverse Only Function from Platform Controls .........................................................................6
4.1-7 No Up or Forward Only Function from Platform Control Console .................................................................6
4.1-8 No Up Function from Platform or Base Control Console ...............................................................................6
4.1-9 No Down Function from Platform or Base Control Console (ANSI/CSA only) ..............................................7
4.1-10 No Down Function from Platform or Base Control Console (CE only) ..........................................................7
4.1-11 No Up Function from Base Control Console ..................................................................................................7
4.1-12 No Down Function from Base Control Console .............................................................................................8
4.1-13 Platform Lowers Slowly from Platform and Base (Model 3215) ....................................................................8
4.1-14 Platform does not Decelerate when Lowering (Model 3215) .........................................................................8
4.1-15 Platform Lifts Slowly from Platform and Base Control console .....................................................................8
4.1-16 Steer Only Inoperative ....................................................................................................................................8
4.1-17 Drive Only Inoperative ....................................................................................................................................8
4.1-18 No Drive or Steer when Platform Fully Lowered ............................................................................................9
4.1-19 No Drive or Steer when Platform Elevated .....................................................................................................9
4.1-20 Elevated Drive Speed Does Not Activate .......................................................................................................9
4.1-21 Work Platform Drives in Slow Speed Only .....................................................................................................9
4.1-22 Forward Drive Function Inoperative .............................................................................................................10
4.1-23 Reverse Drive Function Inoperative ..............................................................................................................10
4.1-24 Brake will not Release...................................................................................................................................10
4.1-25 Two or more Functions at one time ..............................................................................................................10
4
Hydraulic System
4.2-1 All Functions Inoperative ..............................................................................................................................11
4.2-2 All Functions Sluggish ..................................................................................................................................11
4.2-3 Platform Drifts Down .....................................................................................................................................11
4.2-5 Platform Does Not Lift ...................................................................................................................................11
4.2-6 Platform will not Lower ..................................................................................................................................12
4.2-9 Platform will not Drive in Forward or Reverse ..............................................................................................12
4.2-10 Brake(s) will not Release ..............................................................................................................................13
4.2-11 Platform does not Steer ................................................................................................................................13
SKYJACK, Page 1SJIII Compact Series
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Section 4 - Troubleshooting Information Service and Maintenance
Introduction
The following pages contain a table of Troubleshooting Information for locating and correcting most service trouble
which can develop. Careful and accurate analysis of the systems listed in the table of Troubleshooting Information
will localize the trouble more quickly than any other method. This manual cannot cover all possible troubles and
deficiencies that may occur. If a specific trouble is not listed, isolate the major component in which the trouble occurs, isolate whether the problem is electrical or hydraulic, and then isolate and correct the specific problem.
The content of this section is separated into “probable cause” and “remedy.” The information preceded by a number represents the “probable cause.” The following line, noted by a dash represents the “remedy” to the “probable
cause” directly above it. See example below for clarification.
1. Probable Cause
Remedy -
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Section 4 - Troubleshooting InformationService and Maintenance
Electrical System
4.1-1 All Controls Inoperative
1. Battery charger plugged into external power source.
Disconnect charger cord. -
2. Batteries disconnected.
Connect batteries. -
3. Dirty or loose battery terminals.
Clean and tighten connections. -
4. Battery charge low.
Check each cell with a hydrometer. Reading should be 1.275 (fully charged). Recharge if low reading. Replace if reading difference between cells is 0.050.
5. Main battery cables open or defective.
Check continuity. Replace if defective. -
6. Fuse F1 defective.
Replace fuse. -
7. Main battery disconnect switch S1 open or defective.
Close switch. Check continuity. Replace if defective. -
8. Loose or broken wire #3 from motor contactor C1 to circuit breaker CB2.
Check continuity. Replace if defective. -
9. Loose or broken wire #3A from circuit breaker CB2 to charger relay L1CR.
Check continuity. Replace if defective. -
10. Defective or tripped circuit breaker CB2.
Reset circuit breaker. Replace if defective. -
11. Defective battery charger relay L1CR.
Check relay. Replace if defective. -
12. Loose or broken wire #5 from charger relay L1CR to base emergency stop switch S28.
Check continuity. Replace if defective. -
13. Open or defective base emergency stop switch S28.
Close switch. Check switch. Replace if defective. -
14. Loose or broken wire #5A from base emergency stop switch S28 to base key switch S10.
Check continuity. Replace if defective. -
15. Open or defective base key switch S10.
Select function with switch. Check switch. Replace if defective. -
16. Loose or broken wire #00 from pump motor DCM1 to circuit breaker CB1.
Check continuity. Replace if defective. -
17. Defective or tripped circuit breaker CB1.
Reset circuit breaker. Replace if defective. -
18. Loose or broken wire #02 from circuit breaker CB1 to base terminal block.
Check continuity. Replace if defective. -
19. Loose or broken wire #7A from base terminal block to CM1 control module pin P2-12. (CE)
Check continuity. Replace if defective. -
20. Loose or broken wire #02 from base terminal block to CM1 control module pin P2-11. (CE)
Check continuity. Replace if defective. -
4.1-2 All Controls Except for Down Function Inoperative
1. Loose or broken wire #59 from base terminal block to proportional valve 2H-59.
Check continuity. Replace if defective. -
2. Loose or broken wire #02 from base terminal block to proportional valve 2H-59.
Check continuity. Replace if defective. -
3. Defective proportional valve coil.
Check coil for resistance. Reading should be 19 ohms. Replace if defective. -
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Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
4.1-3 All Controls Inoperative From Base Control Console
1. Loose or broken wire #07 from base terminal block to platform emergency stop switch S4.
Check continuity. Replace if defective. -
2. Open or defective platform emergency stop switch S4.
Close switch. Replace if defective. -
3. Loose or broken wire #7A from platform emergency stop switch S4 to base terminal block.
Check continuity. Replace if defective. -
4. Loose or broken wire #7A from base terminal block to base key switch S10.
Check continuity. Replace if defective. -
5. Open or defective base key switch S10.
Close switch. Replace if defective. -
6. Loose or broken wire #10E from base key switch S10 to base up/down switch S2.
Check continuity. Replace if defective. -
4.1-4 All Controls Inoperative From Platform Control Console
1. Loose or broken wire #8C from base key switch S10 to base terminal block.
Check continuity. Replace if defective. -
2. Loose or broken wire #8C or wire #02 from base terminal block to platform emergency stop switch
S4.
Check continuity. Replace if defective. -
3. Open or defective platform emergency stop switch S4.
Close switch. Replace if defective. -
4. Loose or broken wire #8 or wire #02 from emergency stop switch S4 to battery charge indicator
BCI.
Check continuity. Replace if defective. -
5. Loose or broken wire #8 or wire #02 from battery charge indicator BC1 to joystick S7.
Check continuity. Replace if defective. -
6. Defective joystick enable switch S7-6.
Check switch. Replace if defective. -
7. Defective joystick neutral switch S7-1.
Check switch. Replace if defective. -
8. Defective joystick S7.
Check joystick. Replace if defective. -
4.1-5 No Drive or Up Function from Platform or Base Controls (CE only)
1. Defective tilt relay 28CR1 or Aux. tilt relay 28ECR1.
Check relay. Replace if defective. -
2. Loose or broken wire #02 from base terminal block to tilt relay 28CR1 or Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
3. Loose or broken wire #28 from CM1 control module pin P3-4 to tilt relay 28CR1.
Check continuity. Replace if defective. -
4. Loose or broken wire #28E from CM1 control module pin P3-6 to Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
5. Loose or broken wire #19 from base terminal block to Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
6. Loose or broken wire #19A from Aux. tilt relay 28ECR1 to tilt relay 28CR1.
Check continuity. Replace if defective. -
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Section 4 - Troubleshooting InformationService and Maintenance
Electrical System (Continued)
7. Loose or broken wire #19B from tilt relay 28CR1 to base terminal block.
Check continuity. Replace if defective. -
8. Loose or broken wire #19B from base terminal block to motor contactor C1.
Check continuity. Replace if defective. -
4.1-6 No Down or Reverse Only Function from Platform Controls
1. Loose or broken wire “A” from proportional controller S7 to lift/drive switch S3.
Check continuity. Replace if defective. -
2. Lift/Drive switch S3 defective.
Check switch. Replace if defective. -
3. Defective PWM card on joystick S7.
Check joystick card. Replace if defective. -
4. Loose or broken wire #13 down or #15 reverse from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
4.1-7 No Up or Forward Only Function from Platform Control Console
1. Loose or broken wire “B” from proportional controller S7 to lift/drive switch S3.
Check continuity. Replace if defective. -
2. Lift/Drive switch S3 defective.
Check switch. Replace if defective. -
3. Defective PWM card on joystick S7.
Check joystick card. Replace if defective. -
4. Loose or broken wire #14 up or #16 forward from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
4.1-8 No Up Function from Platform or Base Control Console
1. Loose or broken wire #14 from base terminal block to up valve coil 3H-14.
Check continuity. Replace if defective. -
2. Defective up valve coil 3H-14.
Check continuity through coil. Replace if defective. -
3. Open diode D14-1.
Check diode. Replace if defective. -
4. Open diode D14 (ANSI/CSA) or D14-2 (CE).
Check diode. Replace if defective. -
5. Machine not level. (Above high speed limit switch)
Use on level surface. -
6. Loose or broken wire #19 from base terminal block to tilt switch TS1 (ANSI/CSA).
Check continuity. Replace if defective. -
7. Defective tilt switch TS1 (ANSI/CSA).
Test tilt switch. Replace if defective. -
8. Loose or broken wire #28 from tilt switch TS1 to tilt relay 28CR (ANSI/CSA).
Check continuity. Replace if defective. -
9. Loose or broken wire #02 from tilt switch TS1 to base terminal strip (ANSI/CSA).
Check continuity. Replace if defective. -
10. Defective tilt relay 28CR (ANSI/CSA).
Check relay. Replace if defective. -
11. Loose or broken wire #19A from tilt relay 28CR to pump motor contactor (ANSI/CSA).
Check continuity. Replace if defective. -
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Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
12. Open or defective diode D14E-1
Check diode. Replace if defective. -
13. See 4.1-5 of this section for more troubleshooting information.
4.1-9 No Down Function from Platform or Base Control Console (ANSI/CSA only)
NOTE
Down function is not proportionally controlled.
1. Loose or broken wire #13 from base terminal block to down valve 2H-13 or holding valve 2H-13-1.
Check continuity. Replace if defective. -
2. Loose or broken wire #02 from base terminal block to down valve 2H-13 or holding valve 2H-13-1.
Check continuity. Replace if defective. -
3. Defective down valve 2H-13.
Check continuity through coil. Replace if defective. -
4. Defective lift cylinder holding valve 2H-13-1.
Check continuity through coil. Replace if defective. -
4.1-10 No Down Function from Platform or Base Control Console (CE only)
NOTE
Down function is not proportionally controlled.
1. Loose or broken wire #13 from base terminal block to CM1 control module pin P2-4.
Check continuity. Replace if defective. -
2. Defective down relay 28CR2 or Aux. down relay 28ECR2.
Check relay. Replace if defective. -
3. Loose or broken wire #02 from base terminal block to down relay 28CR2 or Aux. down relay
28ECR2.
Check continuity. Replace if defective. -
4. Loose or broken wire #13 from base terminal block to Aux. down relay 28ECR2.
Check continuity. Replace if defective. -
5. Loose or broken wire #13A from Aux. down relay 28ECR2 to down relay 28CR2.
Check continuity. Replace if defective. -
6. Loose or broken wire # 13B from down relay 28CR2 to down valve 2H-13B or holding valve
2H-13B-1.
Check continuity. Replace if defective. -
7. Defective down valve 2H-13B.
Check continuity through coil. Replace if defective. -
Check continuity through coil. Replace if defective. -
9. Loose or broken wire #02 from holding valve 2H-13B-1 or down valve 2H-13B to base terminal
block.
Check continuity. Replace if defective. -
4.1-11 No Up Function from Base Control Console
1. Defective up/down switch S2.
Check switch. Replace if defective. -
2. Loose or broken wire #14E from up/down switch S2 to base terminal switch.
Check continuity. Replace if defective. -
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Section 4 - Troubleshooting InformationService and Maintenance
Electrical System (Continued)
3. Open diode D14E-1.
Check diode. Replace if defective. -
4. Open diode D14E.
Check diode. Replace if defective. -
4.1-12 No Down Function from Base Control Console
1. Defective up/down switch S2.
Check switch. Replace if defective. -
2. Loose or broken wire #13 from up/down switch S2 to base terminal block.
Check continuity. Replace if defective. -
4.1-13 Platform Lowers Slowly from Platform and Base (Model 3215)
1. Deceleration limit switch LS7 stuck, out of adjustment or is defective.
Readjust limit switch so it returns to the normally closed position at 14” before completely stowed. Check the limit switch is functioning. Replace if defective.
4.1-14 Platform does not Decelerate when Lowering (Model 3215)
1. Deceleration limit switch LS7 out of adjustment.
Readjust limit switch so it returns to the normally closed position at 14” before completely stowed. Check the limit
switch is functioning. Replace if defective. -
2. Loose or broken wire #13A (ANSI/CSA) or #13C (CE) from terminal strip to deceleration valve coil
2H-13A (ANSI/CSA) or 2H-13C (CE).
Check continuity. Replace if defective. -
3. Loose or broken wire #02 from terminal strip to deceleration valve coil 2H-13A (ANSI/CSA) or 2H-13C
(CE).
Check continuity. Replace if defective. -
4. Defective deleration valve coil 2H-13A (ANSI/CSA) or 2H-13C (CE).
Check coil. Replace if defective. -
4.1-15 Platform Lifts Slowly from Platform and Base Control console
1. Open diode D14-1.
Check diode. Replace if defective. -
4.1-16 Steer Only Inoperative
1. Defective relay 17CR.
Check relay. Replace if defective. -
2. Loose or broken wire #59D from diodes D23-1 and D24-1 to base terminal block TB1.
Check continuity. Replace if defective. -
3. Loose or broken wire #59D from 17CR steer relay to base terminal block TB1.
Check continuity. Replace if defective. -
4. Loose or broken wire #59 from 17CR steer relay to base terminal block TB1.
Check continuity. Replace if defective. -
4.1-17 Drive Only Inoperative
1. Open diode D17.
Check diode. Replace if defective. -
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Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
4.1-18 No Drive or Steer when Platform Fully Lowered
1. Loose or broken wire #71 from base terminal block to drive override limit switch LS6.
Check continuity. Replace if defective. -
2. Defective drive override switch LS6.
Check switch. Replace if defective. -
3. Loose or broken wire #19 from drive override limit switch LS6 to base terminal block.
Check continuity. Replace if defective. -
4.1-19 No Drive or Steer when Platform Elevated
1. Pothole protection bars not fully lowered.
Clear obstructions. Repair as needed. -
2. Loose or broken wire #71 from base terminal block to pothole protection limit switch LS4.
Check continuity. Replace if defective. -
3. Defective pothole protection limit switch LS4.
Check switch. Replace if defective. -
4. Loose or broken wire #72 from pothole protection limit switch LS4 to base terminal block.
Check continuity. Replace if defective. -
5. Loose or broken wire #72 from base terminal block to pothole protection limit switch LS5.
Check continuity. Replace if defective. -
6. Defective pothole protection limit switch LS5.
Check switch. Replace if defective. -
7. Loose or broken wire #19 from pothole protection limit switch LS5 to base terminal block.
Check continuity. Replace if defective. -
4.1-20 Elevated Drive Speed Does Not Activate
1. Loose or broken wire #59 from base terminal strip proportional relay 21ACR.
Check continuity. Replace if defective. -
1. Loose or broken wire #59A from proportional relay 21ACR to resistor RST2.
Check continuity. Replace if defective. -
2. Resistor RST2 open.
Check resistor ohms, it should be 30 ohms. Replace if defective. -
3. Loose or broken wire #02 from resistor RST2 to base terminal block.
Check continuity. Replace if defective. -
4. Proportional relay 21ACR defective.
Check relay, replace if defective. -
4.1-21 Work Platform Drives in Slow Speed Only
1. Open diode D17-1.
Check diode. Replace if defective. -
2. Loose or broken wire #17A from base terminal block to high speed limit switch LS1B.
Check continuity. Replace if defective. -
3. Open or defective high speed limit switch LS1B.
Check switch. Replace if defective. -
4. Loose or broken wire #21 from high speed limit switch LS1B to low voltage protection resistor RST3.
Check continuity. Replace if defective. -
5. Defective low voltage protection resistor RST3.
Check resistor. Replace if defective. -
6. Loose or broken wire #21A from low voltage protection resistor RST3 to proportional relay 21ACR.
Check continuity. Replace if defective. -
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Section 4 - Troubleshooting InformationService and Maintenance
Electrical System (Continued)
7. Proportional relay 21ACR defective.
Check relay, replace if defective. -
8. Loose or broken wire #2 from proportional relay 21ACR to base terminal block.
Check continuity. Replace if defective. -
9. Proportional controller S7 out of adjustment.
Adjust controller. Refer to Section 5, Joystick Adjusting Procedure. -
4.1-22 Forward Drive Function Inoperative
1. Loose or broken wire #16 from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
2. Loose or broken wire #16 from base terminal block to forward drive valve coil 4H-16.
Check continuity. Replace if defective. -
3. Forward drive valve coil 4H-16 defective.
Check continuity through coil. Replace if defective. -
4. Loose or broken wire #02 from forward drive valve coil 4H-16 to base terminal block.
Check continuity. Replace if defective. -
5. Open diode D16.
Check diode. Replace if defective. -
4.1-23 Reverse Drive Function Inoperative
1. Loose or broken wire #15 from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
2. Loose or broken wire #15 from base terminal block to reverse drive valve coil 4H-15.
Check continuity. Replace if defective. -
3. Reverse drive valve coil 4H-15 defective.
Check continuity through coil. Replace if defective. -
4. Loose or broken wire #02 from reverse drive valve coil 4H-15 to base terminal block.
Check continuity. Replace if defective. -
5. Open diode D15.
Check diode. Replace if defective. -
4.1-24 Brake will not Release
1. Diode D-16 forward or D-15 reverse is shorted or open.
Check diode. Replace if defective. -
2. Loose or broken wire #17 from base terminal strip to brake coil 3H-17.
Check continuity. Replace if defective. -
3. Brake valve coil 3H-17 defective.
Check continuity through coil. Replace if defective. -
4. Loose or broken wire #02 from brake valve coil 3H-17 to base terminal block.
Check continuity. Replace if defective. -
4.1-25 Two or more Functions at one time
1. Shorted diode.
Check continuity of all diodes. Replace if defective. -
SKYJACK, Page 10SJIII Compact Series
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Page 88
Section 4 - Troubleshooting Information Service and Maintenance
Hydraulic System
4.2-1 All Functions Inoperative
1. Proportional valve 2H-59 defective or is sticking.
Check valve. Replace if defective. -
2. Compensator portion of proportional valve defective or is sticking.
Check valve. Replace if defective. -
3. Pump P1 defective.
Check pump. Replace if defective. -
4.2-2 All Functions Sluggish
1. System relief valve R1 defective or not adjusted properly.
Adjust valve. Replace if defective. -
2. Hydraulic pump P1 worn.
Check pump. Replace if defective. -
4.2-3 Platform Drifts Down
1. Defective lift cylinder gland seal.
Check for hydraulic oil leaking from the gland seal. Rebuild cylinder. Replace if damaged. -
2. Combination of: Defective holding valve 2H-13-1 and either defective lowering valve 2H-13 or relief
valve R2 or manual lowering valve V1. (ANSI/CSA)
Check valves. Replace if defective. -
Combination of: Defective holding valve 2H-13B-1 and either defective lowering valve 2H-13B or relief
valve R2 or manual lowering valve V1. (CE)
Check valves. Replace if defective. -
3. Defective o-ring between lift cylinder and holding valve manifold block or loose bolts holding the
manifold.
Check for hydraulic oil leaking from between cylinder and manifold. Tighten bolts on manifold or replace o-ring. Replace manifold if damaged.
4.2-4 Platform Lifts Slowly
1. Open or leaking manual lowering valve V1.
Close valve. Replace if defective. -
2. Lift relief valve R2 defective or not adjusted correctly.
Adjust valve. Replace if defective. -
3. Open manual override on holding valve 2H-13-1 (ANSI/CSA) or 2H-13B-1 (CE).
Depress and turn manual override clockwise to close. Replace if defective. -
4. Stuck or defective deceleration valve 2H-13A (Model 3215 ANSI/CSA) or 2H-13C (Model 3215 CE).
Check valve. Replace if defective. -
4.2-5 Platform Does Not Lift
1. Open manual lowering valve V1.
Close valve. Replace if defective. -
2. Hydraulic oil level too low.
Fully lower the platform. Fill hydraulic tank with recommended fluid to appropriate level. -
Clear obstruction from valve. Replace if defective. -
143909
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Section 4 - Troubleshooting InformationService and Maintenance
Hydraulic System (Continued)
4.2-6 Platform will not Lower
NOTE
Down function is not proportionally controlled.
1. Lowering valve 2H-13 (ANSI/CSA) or 2H-13B (CE) defective or is sticking.
Clean valve. Replace if defective. -
2. Defective holding valve 2H-13-1(ANSI/CSA) or 2H-13B-1 (CE).
Clean valve. Replace if defective. -
3. Lowering orifice O2 (Model 3219) plugged or contaminated.
Clear debris. Replace Orifice. Replace if defective. -
4. Emergency lowering orifice O6 plugged or contaminated.
Clear debris. Replace Orifice. Replace if defective. -
5. Plugged deceleration valve 2H-13A (ANSI/CSA) or 2H-13C (CE).
Clear obstruction from valve. Replace if defective. -
4.2-7 Platform Lowers Slowly
1. Stuck or defective deceleration valve 2H-13A (ANSI/CSA) or 2H-13C (CE).
Check valve. Replace if defective. -
4.2-8 Platform Drives Slow
1. Free-wheeling valve V2 open or defective.
Close valve. Replace if defective. -
2. Drive motor M1 or M2 defective.
Check motors. Replace if defective. -
3. Cushion valve 2H-25 is stuck or defective.
Check valve. Replace if defective. -
4.2-9 Platform will not Drive in Forward or Reverse
1. Open free-wheeling valve V2.
Close Valve. Replace if defective. -
2. Forward drive valve 4H-16 or reverse drive valve 4H-15 defective or is sticking.
Clean Valve. Replace if defective. -
3. Counterbalance valve CB1 defective or is plugged.
Clean Valve. Replace if defective. -
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Page 90
Section 4 - Troubleshooting Information Service and Maintenance
Hydraulic System (Continued)
4.2-10 Brake(s) will not Release
1. Brake valve 3H-17 defective or is sticking.
Clean valve. Replace if defective. -
2. Brake orifice 04 plugged.
Remove orifice. Clean and reinstall. -
3. Brake cylinder C4 defective.
Rebuild cylinder. Replace if damaged. -
4.2-11 Platform does not Steer
1. Right steer valve 4H-23 or left steer valve 4H-24 defective or sticking.
Clean valve. Replace if defective. -
2. Steer cylinder C3 seals leaking.
Rebuild cylinder(s). Replace if damaged. -
3. Mechanical binding in king pins.
Check for binding. Repair as needed. -
4. Orifices 05 plugged.
Clean Orifices, and reinstall. -
143909
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Page 91
Section 5
PROCEDURES
Table of Contents
Service and Maintenance
General .........................................................................................................................................................................3
Safety and Workmanship .............................................................................................................................................3
Platform
5.1-1 OEM Controller Electronics Information ...........................................................................................................3
Test and Verify Tilt Circuit ................................................................................................................................10
Load Sensing System - CE
5.3-1 Control Module Pin Reference Chart ..............................................................................................................11
5.3-2 LED Error Codes - Quick Reference Chart .....................................................................................................12
5.3-3 LED Error Codes - Code Breakdown Chart ....................................................................................................13
5.3-4 Hand Held Calibration/Diagnostic Tool Key Functions ...................................................................................15
The following information is provided to assist you in
the use and application of servicing and maintenance
procedures contained in this chapter.
Safety and Workmanship
Your safety, and that of others, is the first consideration
when engaging in the maintenance of equipment.
Always be conscious of weight. Never attempt to move
heavy parts without the aid of a mechanical device. Do
not allow heavy objects to rest in an unstable position.
When raising a portion of the equipment, ensure that
adequate support is provided.
Platform
5.1-1 OEM Controller Electronics Information
Flow Control
Single coil or solenoid for single direction. The coil
has two connections; one is wired to the P.C. Board
(A) terminal and the other is wired to (-), or the
negative side of the supply voltage. Switches to control
directional valves may be provided on the controller.
“Threshold” Adjustments
Adjust the initial current flow or duty cycle, affecting
the function response or speed when the handle is
first moved from the off position. Deflect the handle
slowly to the position where the controller first turns on.
Adjust the threshold trimpot screw to the point where
the controlled function just starts to move, then turn
the trimpot screw one, full turn in the counterclockwise
direction. This adjustment should be done first.
“Maxout” Adjustments
Adjust the full stroke current or duty cycle affecting the
maximum function response, or speed when the handle
is deflected to its full travel. Fully deflect the handle,
and adjust the maxout trimpot for maximum desired
function response or speed. To obtain proportional
resolution, it is important that the function starts to slow
down as soon as the handle is moved back from the
fully deflected position.
The ideal adjustment occurs when the function just
begins to move when the handle is deflected, and the
output increases until it reaches its maximum desired
response or speed at the end of handle travel.
Adjustment Procedures
Adjustments are made by turning a trimpot adjustment
screw. The trimpots are multi-turn, end-to-end devices.
It may be necessary to turn the adjustment screw
several turns to observe a change in output.
Clockwise (CW) adjustment of the trimpot increases
the output.
Counter-clockwise (CCW) adjustment of the trimpot
decreases the output.
Adjustments affect output current, voltage or percentage
of duty cycle to the coil. The minimum and maximum
output is preset at the factory. However, for optimum
performa nce, they mus t be adjusted while the
equipment is operating.
Although the following adjustments affect the current/
voltage or percentage of duty cycle, the best way
to adjust the function is to observe the response or
speed of the function. The following adjustments affect
function response, or speed. There may be some
interaction between adjustments, making it necessary
to repeat the adjustment in order to achieve the desired
response.
SKYJACK, Page 3SJIII Series
Page 93
Section 5 - ProceduresService and Maintenance
5.1-2 OEM Controller Troubleshooting
Problem
1. The function will not operate when the handle is
moved. The LEDs do not light
A. Check that voltage is present at the positive
(+)input terminal.
B. Check that ground is connected to the
negative (-) terminal.
C. If there is an in-line fuse, check to see if it is
good.
D. Check the controller on/off switch and the
connectors. Voltage should be present at
the (X) terminal when the controller is turned
on.
E. Check that valve wiring is not shorted to
ground. The LEDs will not light.
F. Check that valve wiring is not open. The
LEDs will light, but the intensity will not
vary.
G. Check trimpot settings. Fully “CCW” turns
output off, “CW” turns output fully on.
2. The function jumps or lurches when turned on.
A. P e r f o r m “ T h r e s h o ld ” a d ju st me nt
procedures.
3. The function reaches maximum speed before the
handle is fully deflected,
A. Perform “Maxout” adjustment procedures.
4. The function speed remains constant regardless
of the degree of handle deflection.
A. Perform “Maxout” adjustment procedures.
IRS Option
1. Function speed reacts too slowly or too quickly
in relation to handle deflection.
A. Check “IRS” (Ramp) trimpot adjustment.
“CW ” inc r ea s e s ra m p ti m e, “ C CW ”
decreases ramp time.
Integrated Ramp System (IRS)
Provides smooth function response ,when reacting
to an abrupt change in handle deflection. “CW” rotation of the trimpot increases ramp time and slows the
response time. “CCW” decreases ramp time and increases the response time. To increase the ramp time,
turn the adjusting screw “CW” a few turns, then move
the controller handle abruptly. Continue to adjust until
a smooth response is observed. Most controllers have
on/off contacts which remove power from the P.C. Board
when the handle is returned to the off position. When
the handle is abruptly returned to neutral, the output
will not ramp down, and the function will stop.
Ramp Thru Off
The P.C. Board should be adjusted as outlined in the
IRS adjustment procedure. If the handle is abruptly
returned to neutral (OFF) the output will ramp down
to off. Ramp time is factory set to 2 seconds, unless
otherwise specified.
NOTE
Trimpots should be sealed with nail polish
or enamel based paint.
WARNING
Do not use RTV silicone.
SKYJACK, Page 4SJIII Series
Page 94
Section 5 - ProceduresService and Maintenance
DOUBLE DOT
(STEER RIGHT)
SINGLE DOT
(STEER LEFT)
ENABLE
STEER COMMON
STEER RIGHT
STEER LEFT
ENABLE OUT
+24V INPUT
WHT/GRN
WHT
BLUPWD OUT (A)
BLKGROUND (-)
YELFORWARD/UP
GRY
RED NO
S1
H1
H2
H3
H4
H5
H10
H6
H7
H8
H9
15589 PCB
BLK
REVERSE/DOWN
CONNECTOR
WHT/RED
WHT/BLU
WHT/BLK
WHT/BLK(+24V INPUT)
WHT/YEL(ENABLE)
5.1-3 OEM Controller switch wiring
WIRE CHART
COLORFROMTO
WHT/REDSTEER LEFTPIN #1
WHT/GRNSTEER COMMONPIN #2
WHTSTEER RIGHTPIN #3
YELFORWARD/UPPIN #4
WHT/BLK+24V INPUTPIN #5
GRYREVERSE/DOWNPIN #6
BLUPWM OUT (A)PIN #7
BLKGROUND (-)PIN #8
WHT/BLUENABLE OUTPIN #9
SKYJACK, Page 5SJIII Series
Page 95
Section 5 - ProceduresService and Maintenance
Base
5.2-1 System Relief Pressure Adjustment
1. Locate the system pressure quick disconnect port
on the main manifold.
2. Install a calibrated 5000 psi gauge to the system
pressure quick disconnect port.
3. Remove the platform control console the guardrail
and disconnect from the main control cable.
4. Locate the main control cable plug at the rear of
the aerial platform.
5. Disconnect the main cable and connect the
platform control console into the plug.
6. At the main manifold, loosen the locknut on the
system relief valve R1.
7. Select drive with the lift/drive select switch on the
platform control console.
8. Engaged steer right and hold.
9. Observe reading on gauge. Adjust the R1 system
relief value listed on the serial number plate.
Turning the stem on the relief valve clockwise
wi ll increa ses press ure. Tu rning th e stem
counterclockwise will decreases pressure.
10. Release steer switch and tighten the locknut.
11. Remove the gauge from system pressure test
port.
5.2-2 Lift Pressure Adjustment
NOTE
Adequate area to raise the platform to full
height is required for the following steps.
1. Locate the lift pressure test port on the main
manifold.
2. Install a calibrated 3000 psi gauge to the lift
pressure quick disconnect port.
3. At the main manifold, loosen the locknut on the
lift relief valve R2.
4. Close the manual lowering valve. Use the lift
switch at the base control console to raise the
platform to full height and hold the lift up switch
on.
5. Observe the reading on the gauge. Adjust the
R2 relief valve to the value listed on the serial
number plate. Turning the stem of the relief valve
clockwise will increases pressure. Turning the
stem counterclockwise will decreases pressure.
6. Remove the gauge from lift pressure test port.
NOTE
Pressure setting may vary as aerial platform
components wear. The lift pressure should
be set for rated load only.
SKYJACK, Page 6SJIII Series
Page 96
Section 5 - ProceduresService and Maintenance
Y AXIS
X AXIS
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
5.2-3 Electronic Tilt Switch Setup Procedure
The following information is supplied for replacement
or reprogramming of the electronic tilt switch. Also
included are test and verification instructions. Follow
the appropriate procedures below.
Tilt Switch Replacement
1. Ensure aerial platform is parked on a firm level
surface.
2. Chock or block wheels to keep the aerial platform
from rolling forward or backward.
3. Lower/Raise the platform and secure the scissors
using the maintenance bar. (Refer to Operating
manual for Maintenance Support Procedure)
4. Push in “
” emergency stop buttons and turn
main disconnect switch to “” off position.
5. Remove any covers to locate and view the tilt
switch.
6. Disconnect tilt switch from 4 pin connector.
7. Remove old tilt switch from mount.
NOTE
Ensure part number of old and new tilt
switch are the same.
8. Install new switch to mount (in the same orientation
as the old switch) and connect switch plug to 4
pin connector.
NOTE
The tilt circuit is only powered when
activating a function.
9. Disconnect all wires #02 from motor contactor.
10. Install jumper wire between #7 and #19 to
terminal strip.
11. Turn main disconnect switch to “
” ON position.
12. Verify switch is powered. (Red or green LED will
be continually blinking)
13. Program the Tilt Switch
Press and release the set up button 3 a.
times.
Observe program delay b.
/ stabilization time.
(Only the red LED will
blink for 4 seconds)
B o t h L E D s w i l l c.
flash for 1 second.
Results: The switch is
learning the new zero
position.
Bo th LEDs will turn d.
on solid for 1 second.
Results: The new zero
po s it io n ha s be e n
learned.
The green LED will flash and then the e.
red LED will turn on solid for 2 seconds.
Results: The switch is verifying the new
zero position.
T h e g r e e n L E D f.
will turn on solid.
Results: The switch
is ready fo r normal
operation.
SKYJACK, Page 7SJIII Series
Page 97
14. Turn main di s c o n nect switch to “” off
position.
15. Remove jumper wire between #7 and #19 from
terminal block.
16. Reattach all wires #02 to motor contactor.
17. Reinstall any covers that was removed.
18. Remove chock or wheel blocks.
19. Proceed to Test and Verify Tilt Circuit.
Section 5 - ProceduresService and Maintenance
SKYJACK, Page 8SJIII Series
Page 98
Section 5 - ProceduresService and Maintenance
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Red LED
Green LED
Reprogramming Existing Tilt Switch
Set up button is located on this
Light Indicators
face next to harness
1. Ensure aerial platform is parked on a firm level
surface.
2. Chock or block wheels to keep the aerial platform
from rolling forward or backward.
3. Lower/Raise the platform and secure the scissors
using the maintenance bar. (Refer to Operating
manual for Maintenance Support Procedure)
NOTE
The tilt circuit is only powered when
activating a function.
4. Remove any covers to locate and view the tilt
switch.
5. Disconnect all wires #02 from motor contactor.
9. Reprogram the Tilt Switch
Press and hold the set a.
up button for 3 seconds.
Results: Both LEDs will
be OFF.
Both LEDs will flash. b.
IMPORTANT
Step “c” must be completed within
a 5 second period, or the switch will
automatically exit program mode and
return to normal operation using previously
stored data.
Press and release set up button 3 times.c.
If 5 seco n d pe r iod has expired prior d.
completion, repeat Step “a”, “b” and “c”.
Observe program delay e.
/ stab i l i zation time.
(Only the red LED will
blink for 4 seconds)
B o t h L E D s w i l l f.
flash for 1 second.
Results: The switch is
learning the new zero
position.
6. Install jumper wire between #7 and #19 to
terminal strip.
Both LEDs will turn g.
on solid for 1 second.
Results: T he n e w
7. Turn main disconnect switch to “
” ON position.
zero position has been
learned.
8. Verify switch is powered. (Red or green LED will
be continually blinking)
The green LED will flash and then the h.
red LED will turn on solid for 2 seconds.
Results: The switch is verifying the new
zero position.
SKYJACK, Page 9SJIII Series
Page 99
Section 5 - ProceduresService and Maintenance
Red LED
Green LED
Red LED
Green LED
T h e g r e e n L E D i.
will turn on solid.
Results: The switch
is rea d y for no r mal
operation.
10. Turn main di s c o n nect switch to “
” off
position.
11. Remove jumper wire between #7 and #19 from
terminal block.
12. Reattach all wires #02 to motor contactor.
13. Reinstall any covers that was removed.
14. Remove chock or wheel blocks.
15. Proceed to Test and Verify Tilt Circuit.
Test and Verify Tilt Circuit
Set up button is located on this
Light Indicators
face next to harness
Operations of Tilt Switch
The following describes the LED’s and what they
indicate.
Illuminated whenever both tilt
axes are within the specified
deg r e e s of the zero/ home
Green LED
Red LED
Green & Red LED
learned position.
Flashes when transitioning in
or out of tilt angle limits, but
built in time delay has not fully
occurred.
Illuminated whenever tilt on one
or more axes is more than the
specified degrees out from the
zero/ home position.
On together, no blinking when
fault detected.
Tilt Circuit Test
1. Refer to section 2 for test tilt sensor procedure.
SKYJACK, Page 10SJIII Series
Page 100
Section 5 - ProceduresService and Maintenance
PLUG
PIN
#
WIRE #
AND COLOUR
WIRE FUNCTION
P1 The Calibration Connection
P2 1 Not Used Not Used
P2 2 10E Black/White Input Power From Base Terminal Strip To Confirm Lower Control Is Selected
P2 3 14 Black Raise Platform Input
P2 4 13 Orange Lower Platform Input
P2 5 Not UsedNot Used
P2 6 Not UsedNot Used
P2 7 16 White/Black Forward Direction Input
P2 8 15 Blue Reverse Direction Input
P2 9 Not Used Not Used
P2 10 18B Red/Black Input From LS1 High Speed Limit Switch To Verify ON/OFF Limits
P2 11 02 White Negative Input From Base Terminal Strip
P2 12 7A Red Main Power Input From Base Terminal Strip
P3 1 22 Red Output To FL-22 Flashing Light
P3 2 29 Black Output To BP-29 Beeper
P3 3 60 Black/White Output To Overload Warning Light On Control Box
P3 4 28 Green/Black Output To 28CR1 Tilt Relay And 28CR2 Down Relay
P3 5 02 White Negative for Flashing Light and Beeper
P3 6 28E Green/White Output To 28ECR1 Aux. Tilt Relay And 28ECR2 Aux. Down Relay
P4 1 Not Used Not Used
P4 2 60A Green Varied Input From Transducer
P4 3 28B Green Varied Input From Angle Transducer
P4 4 Not UsedNot Used
P4 5 Not UsedNot Used
P4 6 910 Black Positive Signal To Angle Transducer
P4 7 900 White Negative Signal To Angle Transducer
P4 8 902 White Negative Signal To Pressure Transducer
P4 9 910A Black Positive Signal To Pressure Transducer
M60303AG
Load Sensing System - CE
5.3-1 Control Module Pin Reference Chart
SKYJACK, Page 11SJIII Series
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