LGMG AR14J User manual

LINGONG HEAVY MACHINERY CO., LTD.
△
!WARNING
Before operation and maintenance, the
drivers and maintenance personnel are
required to read this manual thoroughly.
Otherwise, fatal accident may occur. This
manual shall be kept properly for future
reference by the personnel concerned.
Service Manual
AR14J/AR16J
Articulated Boom Mobile
Elevating Work Platform

Articulated Boom Mobile Elevating Work Platform
Service Manual
880*1230 mm sixteen format 8 printed sheet
The second edition was first printed in Mar. 2022
L I N G O N G H E AV Y M A C H I N E R Y C O . , LT D .
Add: F12,Building 3 LushangGuoao Plaza, 9777 Jingshi Road,Lixia District, Jinan,
Shandong, 250000,China
Tel: [phone] Technical service: 86-4009666569
Web: www.LGMG.com.cn Sales of accessories:86-0531-67605016

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
I
Contents
Foreword ......................................................................................................VI
Safety Notices .............................................................................................VII
Chapter 1 Safety and Environment........................................................ 1
1.1 Terms and definitions ............................................................................ 3
1.2 Compliance........................................................................................... 3
1.3 Before maintenance.............................................................................. 3
1.4 Workplace requirements ....................................................................... 4
1.5 Safety considerations for maintenance and repair................................. 4
1.6 Intended use......................................................................................... 6
1.7 Instructions............................................................................................ 6
Chapter 2 Product Introduction...................................................................... 7
2.1 Parameters of machine......................................................................... 9
2.1.1 Parameters of AR14J (A0014JNDCH20) articulated lifting platform.....................9
2.1.2 Parameters of AR16J (A0016JNDCH20) articulated lifting platform...................13
2.2 Pressure parameters of filters and valves ........................................... 15
2.3 Tightening torque of joints and plugs................................................... 16
2.4 Tightening torque of nuts and bolts ..................................................... 18
Chapter 3 Maintenance ............................................................................... 21
3.1 Platform assembly............................................................................... 23
3.1.1 Assembling the file box.......................................................................................23
3.1.2 Assembling the foot switch .................................................................................23
3.1.3 Assembling the lifting cross bar ..........................................................................23
3.1.4 Assembling the platform support ........................................................................24
3.1.5 Assembling the load cell.....................................................................................24
3.1.6 Assembling the swing motor mounting bracket...................................................25
3.1.7 Assembling the platform control unit (PCU)........................................................25
3.1.8 Assembling the anti-collision rubber pad ............................................................25
3.1.9 Assembling the platform .....................................................................................26
3.2 Axle assembly..................................................................................... 26
3.2.1 Disassembling the front axle assembly...............................................................26
3.2.2 Assembling the front axle assembly....................................................................27
3.2.3 Disassembling the rear axle assembly ...............................................................30
3.2.4 Assembling the rear axle assembly ....................................................................31
3.2.5 Disassembling the wheel....................................................................................33
3.2.6 Assembling the wheel.........................................................................................33

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
II
3.3 Jib assembly....................................................................................... 33
3.3.1 Disassembling the swing cylinder, the fly jib cylinder and the jib........................33
3.3.2 Assembling the swing cylinder, the fly jib cylinder and the jib.............................35
3.4 Engine assembly................................................................................. 38
3.4.1 Subassembling the engine .................................................................................38
3.4.2 Assembling the engine cooling system...............................................................41
3.4.3 Assembling the engine fuel pipeline ...................................................................42
3.5 Cable carrier assembly ....................................................................... 44
3.5.1 Disassembling the cable carrier..........................................................................44
3.5.2 Assembling the cable carrier...............................................................................46
3.6 Boom/extension jib assembly.............................................................. 48
3.6.1 Disassembling the boom ....................................................................................48
3.6.2 Assembling the boom assembly .........................................................................49
3.6.3 Disassembling the extension jib assembly .........................................................51
3.6.4 Assembling the extension jib assembly ..............................................................52
3.6.5 Assembling the telescopic boom assembly ........................................................54
3.7 Hydraulic tank/fuel tank....................................................................... 55
3.7.1 Assembling the hydraulic tank ............................................................................55
3.7.2 Disassembling the hydraulic tank.......................................................................57
3.7.3 Assembling the fuel tank.....................................................................................58
3.7.4 Disassembling the fuel tank................................................................................58
3.8 Cylinder assembly............................................................................... 59
3.8.1 Disassembling the boom luffing cylinder.............................................................59
3.8.2 Assembling the boom luffing cylinder..................................................................60
3.8.3 Disassembling the boom telescopic cylinder......................................................61
3.8.4 Disassembling the lower leveling cylinder ..........................................................63
3.8.5 Assembling the lower leveling cylinder ...............................................................64
3.8.6 Disassembling the upper leveling cylinder..........................................................64
3.9 Bleeding cylinder................................................................................. 66
3.9.1 Bleeding function pump......................................................................................66
3.9.2 Bleeding slewing motor.......................................................................................66
3.9.3 Bleeding walking motor.......................................................................................66
3.9.4 Bleeding steering cylinder...................................................................................66
3.9.5 Bleeding folding jib luffing cylinder......................................................................67
3.9.6 Bleeding main boom luffing cylinder and lower leveling cylinder ........................67
3.9.7 Bleeding main boom telescopic cylinder.............................................................68
3.9.8 Bleeding fly jib luffing cylinder and upper leveling cylinder.................................68
3.9.9 Bleeding platform swing cylinder ........................................................................68

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
III
3.10 Folding jib assembly.......................................................................... 70
3.10.1 Removing folding jib .........................................................................................71
3.10.2 Assembling folding jib assembly.......................................................................75
3.10.3 Removing folding jib lift cylinder .......................................................................77
3.10.4 Assembling folding jib lift cylinder .....................................................................78
3.11 Rotary table swing assembly............................................................. 79
3.11.1 Removing slewing drive assembly....................................................................79
3.11.2Assembling slewing drive assembly..................................................................80
3.11.3 Lifting rotary table .............................................................................................80
3.12 Other components............................................................................. 80
3.12.1 Assembling battery ...........................................................................................80
3.12.2 Assembling tilt sensor.......................................................................................81
3.12.3 Assembling horn...............................................................................................81
3.12.4 Assembling slewing ring grease filler hose .......................................................82
3.12.5 Assembling ground control system...................................................................82
3.12.6 Assembling hydraulic oil radiator ......................................................................83
3.13 Valve group....................................................................................... 84
3.13.1 Multi-way valve assemblyAR16JEDC-5...........................................................84
3.13.2 Platform swing control valve ST4277-AB00......................................................85
3.13.3 ST5093-AB0C walking control valve group ......................................................86
Chapter 4 Maintenance ............................................................................... 89
4.1 Observing the regulations ................................................................... 91
4.2 Checking the battery........................................................................... 91
4.3 Checking the hydraulic filter................................................................ 92
4.4 Replacing the air filter of the hydraulic tank......................................... 94
4.5 Checking the hydraulic oil level........................................................... 94
4.6 Checking the oil level of the reducer ................................................... 94
4.7 Changing the reducer gear oil............................................................. 95
4.8 Maintenance of worm-type slewing drive............................................. 96
4.9 Maintenance of Deutz engine.............................................................. 97
4.9.1 Checking the engine oil level..............................................................................97
4.9.2 Changing engine oil and replacing oil filter.........................................................98
4.9.3 Checking fuel leaks...........................................................................................100
4.9.4 Bleeding or replacing the fuel filter ...................................................................100
4.9.5 Checking the air cleaner of the engine .............................................................102
4.9.6 Cleaning or replacing the air cleaner................................................................102
4.9.7 Checking the coolant level................................................................................103
4.9.8 Adding or changing engine coolant...................................................................103

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
IV
4.9.9 Checking the engine belt..................................................................................104
4.10 Scheduled maintenance.................................................................. 105
4.11 Fault diagnosis of engine................................................................. 106
4.12 Maintenance schedule .....................................................................111
Chapter 5 Commissioning...........................................................................117
5.1 Safety instructions..............................................................................119
5.2 Commissioning process.................................................................... 120
5.3 Machine inspection ........................................................................... 121
5.4 Basic test .......................................................................................... 122
5.4.1 Start test...........................................................................................................122
5.4.2 Basic operation test of ground control unit........................................................124
5.4.3 Basic operation test of platform control system ................................................126
5.4.4 Hydraulic oil level test.......................................................................................129
5.4.5 Load test (1.1 times rated load)........................................................................130
5.4.6 Travel speed (high speed) test .........................................................................130
5.4.7 Braking distance test ........................................................................................131
5.4.8 Drive speed limit test ........................................................................................131
5.4.9 Braking distance test (at slow speed)...............................................................132
5.4.10 Drive enable system test ................................................................................132
5.4.11 Tilt sensor test.................................................................................................133
5.4.12 Gradeability test (45%)...................................................................................133
5.4.13 Gradeability test (25%)...................................................................................134
5.4.14 Floating test....................................................................................................134
5.4.15 Operation time test .........................................................................................134
5.4.16 Lifting height test ............................................................................................137
5.4.17 Load test (1.25 times).....................................................................................137
5.4.18 Rated load calibration.....................................................................................138
5.5 Pressure test..................................................................................... 138
5.5.1 Function valve relief pressure test....................................................................138
Chapter 6 Appendix................................................................................... 141
6.1 DTCs of COBO system..................................................................... 143
6.2 Schematic diagram ........................................................................... 144
6.2.1 AR14J/AR16J hydraulic schematic diagram (Rexroth).....................................144
6.2.2 AR14J/AR16J hydraulic schematic diagram (Sant main valve) ........................145
6.2.3 AR14J/AR16J electrical schematic diagram (Rexroth) .....................................146
6.2.4 AR14J/AR16J electrical schematic diagram (Sant main valve) ........................147
6.3 Diagram of common hydraulic part symbols...................................... 148
6.4 Diagram of common electrical part symbols...................................... 164

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
V
Chapter 7 Kubota EU5 Engine Content..................................................... 176
7.1 Parameters of machine..................................................................... 178
7.1.1Parameters of AR14J（A0014JNKCH21）articulated lifting platform ...............178
7.1.2 Parameters of AR16J(A0016JNKCH21) articulated lifting platform ..................180
7.2 Kubota EUⅤEngine assembly ........................................................ 183
7.2.1 Subassembling the engine ...............................................................................183
7.2.2 Assembling the engine cooling system.............................................................184
7.2.3 Assembling the engine fuel pipeline .................................................................185
7.3 Kubota EUⅤengine maintenance..................................................... 187
7.3.1 Compliance and Obedience .............................................................................187
7.3.2 Check for Batteries...........................................................................................187
7.3.3 Maintenance of worm-Type Slewing Drive........................................................187
7.3.4 Check Hydraulic Oil Level.................................................................................188
7.3.5 Check for the Oil Level in the Reducer.............................................................189
7.3.6 Replacement of the Gear Oil of Reducer..........................................................189
7.3.7 Replacement of Engine Oil and Filter...............................................................190
7.3.8 Check for Fuel Leakage....................................................................................191
7.3.9 Draining of water separator ..............................................................................191
7.3.10 Replacement of the Fuel filter.........................................................................192
7.3.11 Changing of oil separator element..................................................................193
7.3.12 Cleaning or Replacement of Air Filter.............................................................193
7.3.13 Check for Coolant Liquid Level.......................................................................194
7.3.14 Filling or Replacement of Engine Coolant.......................................................194
7.3.15 Check for Engine Belt.....................................................................................195
7.3.16 Regular Maintenance......................................................................................195
7.3.17 Kubota EUⅤEngine fault table.....................................................................196
7.3.18 Engine fault codes..........................................................................................198
7.4 Kubota EUⅤSchematic Diagram .................................................... 205

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
VI
Foreword
Thanks for purchasing the product produced by Lingong Heavy Machinery Co., Ltd. This manual
introduces the technical parameters and maintenance & adjustment data of the Articulated Boom
Mobile Elevating Work Platform, and also the troubleshooting and maintenance process for reference
by qualified professional maintenance personnel.
The information contained in this manual are correct at the time of publication, but due to the
continuous improvement of the structure and performance of our products, the design as well as
operation and maintenance instructions of the product may be subject to change without notice. For
the latest information of the machine or any question about this manual, please consult us. In
additions, readers of this manual are encouraged to feedback the errors and put forward suggestions
to Lingong Heavy Machinery Co., Ltd., which will be carefully considered in the future publication and
printing of this manual.
This manual is the property of Lingong Heavy Machinery Co., Ltd., and is not allowed to be
duplicated or reprinted without our written permission.
△!WARNING
Only the personnel who have professionally trained and qualified are
allowed to operate and maintain the machine.
Incorrect operation, maintenance and repair are dangerous and may lead to
personal injury or death.
Before operation or maintenance, please read this manual thoroughly.
Otherwise, do not operate, maintain or repair this machine.
Please load the machine in strict accordance with the rating, otherwise all
the consequences arising from overloading or unauthorized modification
will be borne by the user.
The operation instructions and precautions in this manual apply only to the
intended use of the machine. If the machine is used for an operation that is
out of the specification herein but not prohibited, always make sure that
this operation will not cause personal injury to yourself or others.

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
VII
Safety Notices
The operator shall understand and abide by the current national and local safety regulations. If such
regulations are not available, the safety instructions in this manual shall prevail.
Most accidents are caused by failure to obey operation and maintenance specifications of the
machine. To avoid unnecessary accident, please read and follow all warnings and precautions in this
manual and on the machine before operation or maintenance. Failure to comply with the instructions
and safety rules in this manual and the corresponding manual on the machine will result in death or
serious injury.
Considering the fact that not all possible hazards are foreseeable, it is impossible for safety notices
in this manual and on the machine to cover all safety precautions. If it is necessary to take steps and
operations not recommended herein, always protect the safety of yourself and others, and keep the
machine from any damage. If the safety of some operations remains uncertain, please consult us or
dealers.
Some operations to the machine require not only basic mechanical, hydraulic and electrical skills,
but also professional skills, tools, lifting equipment and suitable workshop. Considering this, it is
strongly recommended for you to get the machine maintained and repaired in the service center
authorized by Lingong Heavy Machinery Co., Ltd.
The operation and maintenance precautions referred to herein apply only to the intended use of this
machine. If the machine is to be used for other purposes than those listed herein, it is the user or
operator instead of us that shall take the safety liabilities therefrom.
In no case shall any operations expressively prohibited herein be performed.
For the purpose of this manual, the following signal words are applied to identify safety instructions:
△!DANGER - Indicating any existing dangers that, if not avoided, will cause
serious injury or even death, and also serious machine damage.
△!WARNING - Indicating any potential dangers that, if not avoided, may cause
death or serious injury, and also serious machine damage.
△!CAUTION - Indicating situations that, if not avoided, may cause minor or
moderate injury, and also machine damage or shortened machine service life.

Service Manual of the Articulated Boom
Mobile Elevating Work Platform
I