LGMG T65JE User manual

LGMG North America Inc.
Maintenance manual
T65JE/T72JE/T85JE/T92JE
Telescopic Boom
Mobile Elevating Work Platform
△
! WARNING
Before operation and maintenance, the
drivers and service personnel shall
always read and thoroughly understand
all information in this manual. Failure to
do so may result in, fatal accidents or
personal injury.
This manual must be kept with this
machine at all times.

This page left blank intentionally

LGMG North America Inc. Maintenance Manual
I
Contents
Foreword.....................................................................................................II
Safety Notices............................................................................................III
Chapter 1 Maintenance...............................................................................1
1.1 Observing the Regulations................................................................ 3
1.2 Inspection Manual............................................................................. 3
1.3 Check Labels and Decals................................................................. 3
1.4 Every day or Every 8 Hours.............................................................. 3
1.5 Every 100 Hours............................................................................... 5
1.6 Every 250 Hours............................................................................... 5
1.7 Every 500 Hours..............................................................................11
1.8 Every 1000 Hours........................................................................... 13
1.9 Every 2000 Hours........................................................................... 15
1.10 Scheduled Maintenance ............................................................... 16
1.11 Maintenance Point ........................................................................ 17
1.12 Introduction to Thermal Management Strategy of Lithium-ion
Battery ..................................................................................................... 22
Chapter 2 Schematic Diagram ..................................................................25

LGMG North America Inc. Maintenance Manual
II
Foreword
Thank you for choosing to use this Mobile Elevating Work Platform from LGMG North America. This
machine is designed according to A92.20-2021.The information specified in this manual is intended for
the safe and proper operation of this machine for its’ intended purpose.
For maximum performance and utilization of this machine, thoroughly read and understand all the
information in this manual before starting, operating, or performing maintenance on this machine.
Due to continuous product improvements, LGMG NorthAmerica reserves the right to make specification
changes without any prior notifications. For any updated information, contact LGMG NorthAmerica.
Ensure all preventive maintenance to the machine is performed according to the interval specified in the
maintenance schedule.
Keep this manual with this machine for reference at all times. When the ownership of this machine is
transferred, this manual shall be transferred with this machine. This manual must be replaced
immediately if it is lost, damaged, or becomes illegible.
This manual is copyrighted material. The reproduction or copy of this manual is not allowed without the
written approval of LGMG NorthAmerica.
The information, technical specifications and drawings in this manual are the latest available when this
manual is issued. Due to continuous improvement, LGMG North America reserves the right to change
the technical specifications and machine design without notice. If any specifications and information in
the manual are not consistent with your machine, please contact the service department of LGMG North
America.
△
! WARNING
Operators and maintenance personnel must read, understand and abide by the
safety regulations and operating instructions specified in this manual before
operating and maintaining this machine, otherwise, it may lead to casualties!
Only specially trained and qualified personnel can operate, maintain and repair
the machine.
Improper operation, maintenance and repair are dangerous and may result in
injury or death.
Users shall be familiar with the rated load, and overloading is strictly prohibited.
The users shall be responsible for all the consequences caused by overloading
or unauthorized modification.
The operating procedures and precautions provided in this manual are only
applicable to the specified purposes of this machine. If it is used for operations
other than those specified but not prohibited, make sure that there is no potential
safety hazard.

LGMG North America Inc. Maintenance Manual
III
Safety Notices
The operator of this machine shall understand and follow the existing safety regulations of state and
local governments. If these are unavailable, the safety instructions in this manual shall be followed.
To help prevent accidents, read and understand all warnings and precautions in this manual before
operation or performing maintenance.
The safety measures are specified in Chapter 1 Safety.
It is impossible to foresee every possible hazard and the safety instructions in this manual may not cover
all safety prevention measures. Always ensure the safety of all personnel and protect the machine
against any damage. If unable to confirm the safety of some operations, contact LGMG North America.
The operation & maintenance prevention measures listed in this manual are only applicable to the
specified uses of this machine. LGMG North America assumes no responsibility if this machine is used
beyond the range of this manual. The user and the operator shall be responsible for the safety of such
operations.
Do not perform any operation forbidden in this manual in any situation.
The following signal words are applicable for identifying the level of safety information in this manual.
△
! DANGER:
An imminent situation, that if not avoided, will result in severe injuries or death. This
is also applicable to situations that will cause serious machine damage, if not
avoided.
△
! WARNING:
A potentially dangerous situation, that if not avoided, may result in severe injuries or
death. This is also applicable to situations that may cause serious machine damage,
if not avoided.
△
! NOTICE:
A situation, that if not avoided, may result in minor or intermediate injury. This is also
applicable to situations that may cause machine damage or shorten machine service
life.

LGMG North America Inc. Maintenance Manual
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LGMG North America Inc. Maintenance Manual
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Chapter 1 Maintenance

LGMG North America Inc. Maintenance Manual
2

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1.1 Observing the
Regulations
1) You are properly trained and qualified to
operate and maintain the machine safely.
2) All safety regulations in this manual,
workplace safety regulations and
applicable government laws and
regulations must be read, understood and
complied.
3) Equipped with PPE, such as helmet, seat
belt, safety shoes, goggles, protective
clothing, insulating gloves, insulating shoes,
etc., and in good physical condition.
4) When maintenance and repair procedures
are being performed, many dangers
indicated in the Operation Manual will also
become potential safety hazards.
5) Scheduled maintenance and repair can
only be completed by trained and qualified
maintenance technician.
6) Dispose of waste materials in accordance
with government regulations and workplace
regulations.
7) Only parts and consumables approved by
the LGMG can be used.
8) Always perform functional tests after
maintenance.
1.2 Inspection Manual
It's necessary for safe equipment operation to
keep operation manual and maintenance
manual in good condition.An illegible or missing
manual will not provide the necessary safety
and operational information for the safe
operation.
1) Make sure that the operation manual and
maintenance manual are complete in the
file box.
2) Check each page of the inspection manual
to ensure that it is legible and in good
condition.
3) Put the manual into the file box after use.
△
! CAUTION: If the manual needs to
be replaced, please contact the LGMG
service personnel.
1.3 Check Labels and Decals
It is necessary for safe operation of equipment
to keep all safety and description labels and
decals in good condition. The label warns the
operator and staff of many possible hazards
during use of this equipment. It also provides
the user with operation and maintenance
information. The illegible label cannot warn the
staff of steps or dangers, which may also lead to
unsafe operation.
Refer to the label section of this operation
manual to check whether all label are where
they shall be.
Check the clarity and damage of all label and
immediately replace any damaged or illegible
label.
△
! CAUTION: If you need to replace
the label, please contact the LGMG
service personnel.
1.4 Every day or Every 8
Hours
1.4.1 Check for Damaged and Loose or
Missing Part
Perform this step every 8 hours or every day.
Daily equipment status checks will be necessary
for safe equipment operation and good
equipment performance. Incorrect positioning
and repair damage, and loose or missing parts
may lead to unsafe operating conditions.
1) Check the damage of the whole equipment
and incorrect installation or loss of parts,
including:
Electrical components, wiring and cable
Hydraulic hose, joint, valve block, hydraulic

LGMG North America Inc. Maintenance Manual
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cylinder
Hydraulic tank
Boom cable carriers and sliders
Tires and hubs
Limit switchs, horns
Nuts, bolts and other fasteners
Indicator lamps and alarms
Drive shafts
Check the entire machine to find:
Cracks in weld or structural parts
Whether the chassis is deformed or open
weld
Dent or damage to the machine
Ensure that all structural parts and other
key components are complete and all
relevant fastener and pin are in the correct
position and tightened
Scheduled maintenance
In extremely cold, dusty or humid working
environment, more frequent lubrication and
maintenance than specified in "scheduled
maintenance" is required. During maintenance,
the maintenance items listed in the original
requirements shall be repeated.
For example, when proceeding the
maintenance item for 500 working hours, the
maintenance items listed for every 250 working
hours and every 100 working hours shall be
carried out at the same time.
1.4.2 Check the Hydraulic Oil Level and
Hydraulic Oil Leaks
Check the hydraulic oil level every 8 hours or
every day.
△
! CAUTION: Perform this step
when the arm rod is in the stowed
position.
Park the telescopic boom lift on a flat
ground. The arm rod shall retract to the
stowed position.
Figure 1-1 Hydraulic oil dipstick
Check the oil dipstick on the hydraulic oil
tank. The liquid level shall be within the M
range as shown in Figure 1-1. If the liquid
level is lower than M, the hydraulic oil shall
be filled. Select the hydraulic oil grade
according to the temperature.
Temperature
Type
Minimum
temperature >-25 ℃
L-HV32 low
temperature
hydraulic oil
-40℃< minimum
temperature ≤-25 ℃
L-HS32 ultra-low
temperature
hydraulic oil
Minimum temperature
≤-40 ℃
No. 10 aviation
hydraulic oil
Check for hydraulic oil leaks every 8 hours or
every day.
△
! CAUTION: Danger of personal
injury: Spilled hydraulic oil can
penetrate and burn the skin, Goggles
and protective gloves must be worn.
The leakage of high-pressure oil may not
be visible to eyes. Cardboard or wood chip
shall be used as a tool to check for
hydraulic oil leakage. It is forbidden to
confirm it by hand. Check oil droplets or oil
residues on the following components:
Hydraulic tank, filter, pump, hydraulic

LGMG North America Inc. Maintenance Manual
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cylinder, motor, reducer, valve block,
hydraulic pipe
Check oil droplets or oil residues in the
following areas:
Rear of arm rod, fly jib, upper of rotary table,
upper and lower of drive chassis, ground
area under equipment
1.5 Every 100 Hours
1.5.1 Slewing Bearing and Slewing
Gear Lubrication
Fill the slewing bearing and slewing gear with
grease every 100 hours. Regular lubrication of
slewing bearings is necessary to maintain good
equipment performance and service life.
Incorrect lubrication can lead to component
damage.
Figure 1-2 Slewing mechanism
1. Slewing bearing 2. Oil pipe
3. Grease nipple 4. Adjusting bolt
5. Lock nut 6. Fixing bolt
7. Slewing reducer
As shown in Fig. 1-2, find the grease filler 3
next to the slewing reducer, connect the
greaser, and rotate the rotary table several
times while filling grease until the grease
overflows from the upper and lower fixing
surfaces of the slewing bearing. Grease
grade: lithium base grease 2#.
Check the lubrication of slewing bearing
gear and slewing reducer gears, clean the
gear surface if necessary, and apply the
grease again.
△
! CAUTION: If there is too much
dust in the working environment,
increase the frequency of filling
grease.
1.6 Every 250 Hours
1.6.1 Check the Air filter of Hydraulic
Tank
This check is performed every 250 hours or
quarterly, whichever comes first.
A hydraulic tank cap with smooth ventilation is
essential for achieving good mechanical
performance and service life. Dirty or clogged
vent caps may lead to poor performance of the
machine. Inspection shall be carried out
frequently in the harsh working environment.
①Remove the vent cap from the hydraulic
tank cover.
②Ventilation check.
Result: air can pass through the vent cap.
Result: if the air cannot pass through the vent
cap, clean or replace the vent cap. Continue
with Step 3.
Note: when checking the ventilation of the fuel
tank cap, the air shall be able to pass freely.
③Clean the tank vent cap carefully with a
mild solvent and dry it with low pressure
compressed air. Repeat step 2.
④Install the hydraulic tank vent cap.
1.6.2 Check the Battery
Check the battery once every 250 hours or
every quarter, whichever comes first.
△
! DANGER: Explosion hazard!
Danger of electric shock! Burn danger!
When operating, keep away from fireworks and

LGMG North America Inc. Maintenance Manual
6
remove all rings, watches and other accessories.
Wear goggles, protective gloves and protective
clothing if necessary. Avoid touching the spilled
electrolyte with hands or other parts of the body,
and neutralize spilled electrolyte with baking
soda.
Good battery condition is critical to machine
performance and safe operation. Unsuitable
voltage or damaged cable and wiring may
cause damage to components and create
dangerous conditions.
Check maintenance-free lead-acid battery:
Check whether the battery lock lever is
stable.
Check the wiring of the battery cable, which
shall be secure and uncorrosive.
Check whether the electrolyte is leaking
and whether the battery is dry and clean.
Check electric eye status every three months
(maintenance-free lead-acid battery)
As shown in Figure 1-3, check the battery
hydrometer color:
Figure 1-3 Battery Hydrometer
Color of
electric
eye
Meaning and processing method
White
Insufficient electrolyte. Please shut
down the machine and stop using
it.
Black
Under voltage or damage
Green
Measure the voltage of each
battery. If the voltage is lower than
11 V, it indicates that the battery is
damaged (open circuit or short
circuit);
The voltage is between 12.4 V-12.7
V, indicating that the battery is in
good condition
Table 1-1 Color and description of battery
hydrometer
If the battery hydrometer color is green and
the voltage is above 12V, but it cannot work
normally, please ask the trained
maintenance personnel who have obtained
the corresponding qualifications to further
test the battery.
This machine supports the DC-DC power
supply function, where the lithium battery
pack automatically detects and
supplements the lead-acid battery voltage.
When the lead-acid battery voltage is low,
power replenishment is started.
△
! NOTE: When the lithium battery
soc is lower than 10%, or the lithium
battery level 1 fault alarm is triggered,
stop the power replenishment.
1.6.3 Check the Tire and Nut Torque
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
Maintaining the tire and hub in good condition is
essential for the safe operation and good
performance. Failure of tire and hub may cause
the machine to roll over. If not find the failure
and repair it in time, it will also cause damage to
the machine parts.
Filled tire and solid tire do not need inflation.
1) Check the tire tread and sides for scratches,
cracks, piercing and other abnormal wear.
2) Check the hub for damage, bending and
cracking.
Check tire nut torque
Type
Torque
T65JE/T72JE/T85JE/T92JE
600±60N.m
Hydrometer

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1.6.4 Check the Clearance between the
Slewing Bearing and the Slewing
Reducer
Measured every 250 hours or quarterly,
whichever comes first.
The rotary table shall rotate smoothly without
jam and pause. Measure the backlash
between slewing bearing gear and slewing
reducer with feeler gauge. The backlash shall
be between 0.2-0.3mm. If it is out of the range,
please adjust it.
Figure 1-4 slewing mechanism
1. Slewing bearing 2. Oil pipe
3. Grease nipple 4. Adjusting bolt
5. Lock nut 6. Fixing bolt
7. Slewing reducer
Loosening fixing bolt 6 and lock nut 5
Turn adjusting bolt 4 to adjust reducer
position
Measure slewing bearing gear and slewing
reducer gear backlash with feeler gauge
If the clearance is between 0.2-0.3 mm,
tighten lock nut 5 and tighten fixing bolt 6
Measure the backlash between slewing
bearing gear and slewing reducer gear
again to verify that requirements are met.
Tighten the fixing bolt 6, torque:
595±55N•m.
1.6.5 Visual Inspection of Hydraulic Oil
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
Collect a hydraulic oil sample and place it in a
transparent container. The operation of the
visual inspection of hydraulic oil is as follows:
Color: the oil color should be transparent
and light honey.
Appearance: the oil should be clear and not
cloudy, and the viewing angle should not be
visibly distorted when viewing through the
sight glass or container. Without particles,
foreign matter or other contaminants.
The hydraulic oil can be checked by smell
(the smell of "hot" can be smelled, but not
"burnt" smell) or friction between fingers (It
should be sticky without any graininess).
If all the hydraulic oil passes the above
inspection, continue maintenance at
predetermined intervals. If the hydraulic oil fails
in any of the above checks, the hydraulic oil
must be tested.
1.6.6 Check the Oil Level of the Drive
Axle Main Reducer and Close-to-wheel
Reducer
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
△
! CAUTION: The vehicle must be
parked on a level, solid ground before
operation. Place a cushion block under
the tire to prevent the machine from
moving.
△
! CAUTION: To drain or fill oil and
check the oil level, the drive axle must
be level and installed on the vehicle.
Check main reducer oil level

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Figure 1-5
1. Filler port/sight port
2. Drain port
3. Breather
Carefully clean breather 3 and the
surrounding area.
Remove plug 1 and check if the oil level is
at the lower edge of the filler port, otherwise
add oil.
Tighten the plug.
Act on each main reducer in the same way.
Check close-to-wheel reducer oil
Figure 1-6
4. Filler port/sight port/drain port
Turn the wheel so that the plug 4 is in the
highest position, and partially loosen it to
release the pressure that may exist.
Turn the wheel so that the plug 4 is in a
horizontal position, remove the plug to
check whether the oil level is at the lower
edge of the filler port, otherwise add oil and
tighten the plug.
Work on each close-to-wheel reducer in the
same way.
1.6.7 Check the Transfer Case Oil Level
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
Figure 1-7
1. Filler port/sight port
2. Drain port
3. Breather
Carefully clean breather 3 and the
surrounding area.
Remove plug 1 and check if the oil level is
at the lower edge of the filler port, otherwise
add oil.
Tighten the plug.
1.6.8 Check the Oil Level of the
Slewing Reducer
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
Improper oil level in the reducer will reduce the
performance of the equipment, and continuous
use will lead to component damage.
1) Slewing reducer oil level inspection

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9
Figure 1-8 Slewing reducer
1. Filler port 2. Sight port
Remove the plug 2 on the reducer side and
check the oil level, as shown in Figure 1-8.
Result: the oil level should be the same as sight
port 2 height.
When it is needed, please add gear oil
through filler port 1 until the oil level is the
same as the bottom height of sight port 2.
Apply pipe thread sealant to the plug and
install the plug into the reducer.
The gear oil recommended is as the following
table
Item
Condition
Grade
Gear
oil
30°C < Minimum
temperature
85W/140
-10°C < Minimum
temperature <30°C
85W/90
-30°C <Minimum
temperature <-10°C
80W/90
Minimum temperature
<-30°C
75W
1.6.9 Check the Wires
This check should be performed every 250 h or
quarterly, whichever comes first.
It is important for safe operation and good
machine performance to keep the wires in good
conditions. Failure to find and replace the
burn-out, scratched, corroded or bent wires will
result in unsafe operating conditions and
damage to the parts.
Risk of electric shock/explosion
Contact with live circuits may cause serious
injury or death. Do not wear rings, watches or
other jewelry.
Please wear insulating gloves, insulating shoes,
etc., and in good physical condition.
1) Check the following areas for burn-out,
scratched, corroded, bent or loose wires:
Motor wiring harness
All wire harness connectors to ground
control box
All wire harness connectors to platform
control box
Hydraulic manifold wiring
Battery harness
Cables on the primary, secondary and jib
booms
2) Check whether all wire harness connectors
are coated with insulating grease:
Ground control unit
Platform control unit
Harness connectors
Sensor
1.6.10 Check the Electrical Contactor
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
Maintaining the electrical contactor in good
condition is essential for the safe operation of
the machine. Failure to detect worn or damaged
contactors in time may endanger the safety of
working conditions and cause component
damage.
1) Open the battery side cover.
2) Visually inspect the contact points of the

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10
contactors from the following aspects:
Transition burning
Transition bending
Transition pitting
△
! WARNING: Danger of motor
burning. Contact with electrical circuits
may cause death or serious physical
injury. Remove all rings, watches and
other accessories.
△
! NOTE: If any damage is found,
the contactor needs to be replaced.
1.6.11 Wire Rope Inspection
This inspection is carried out every 250 hours or
every quarter, whichever comes first.
After the equipment works for a long time, the
telescopic wire rope will extend, which will
cause problems such as the 2nd boom section
failing to extend and retract into place, the wire
rope falling out of the pulley, the 2nd boom
section jittering during extension and retraction,
and the wire rope whipping or rubbing with the
arm rod inner wall during extension and
retraction. Therefore, the condition of the wire
rope should be check regularly.
Fig. 1-9 Assembly Diagram of Telescopic
System
1. Arm rod rear enclosure plate
2. Extension wire rope counterweight
3. Extension wire rope
4. Extension pulley block
5. Second boom section side enclosure plate
6. Retraction pulley block
7. Retraction wire rope
8. Retraction wire rope counterweight
1) Luff the arm rod to a horizontal position,
extend and retract the arm rod, and check
whether the 1st and 2nd boom sections
start to operate at the same time during arm
rod extension and retraction. If the 2nd
boom section lags behind the 1st section
arm, the wire rope is loose.
2) Luff the arm rod to a horizontal position,
extend and retract the arm rod, and check
whether the 2nd boom section jitters or
whether there is a sound of wire rope
whipping on the inner wall of the arm rod
during expansion and retraction. If the
above phenomenon exists, the wire rope is
loose.
3) As shown in Fig. 1-9, open the arm rod rear
enclosure plate 1, check whether the
extension wire rope counterweight 2 is
skewed to one side, and check whether the
retraction wire rope counterweight 8 is
skewed to one side. If there is skewing, the
wire rope is loose.
4) Luff the arm rod to the horizontal position,
fully extend the arm rod, and open the rear
enclosure plate 1 of the arm rod and the
side enclosure plate 5 of the 1st boom
section. Visually inspect the working state
and wear of extension pulley block 4,
retraction pulley block 6, extension wire
rope 3, and retraction wire rope 7. The
pulley shall be fixed firmly without shaking,
the uneven wear of the pulley groove shall
be less than 3 mm, and the wear of the rim
shall be less than 10% of the original wall
thickness. The wire rope is free from
looseness, broken wires and serious rust.
There is no obvious swing of the pulley
during extension and retraction. If any
abnormality is found, please stop using it
immediately and hang the fault sign.
Replacement of the Wire Rope
It is required that this procedure should be
performed each 7000 hours or 12 years,
whichever comes first.
More frequent inspection or replacement (if

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11
necessary) is required when:
The machine is operated in harsh
environment;
The boom involves seizure or unusual noise
during operation;
The machine is out of service for a long time;
The boom is overloaded or subject to
continuous impact load;
The boom is exposed to electric arc, by
which the strands in the rope may be fused
together.
Regular replacement of wire rope is essential
for machine to maintain good performance and
safe operation.
Please refer to the Service manual for steps for
replacement of boom extend and retract cables:
How to replace the wire rope.
1.7 Every 500 Hours
1.7.1 Replace Hydraulic Filter
Figure 1-10
1. Hydraulic tank air filter
2. Return filter
Figure 1-11
3. High pressure filter
Replace the hydraulic return filter and high
pressure filter element every 500 hours or half a
year, whichever comes first.
The replacement of the hydraulic filter is
necessary to maintain good machine
performance and longevity. Dirty or clogged
filters may cause performance degradation of
hydraulic components, and continuous use may
result in component damage. Extreme operating
conditions require increased filter replacement
times.
Park the vehicle on a solid level ground. Lower
the arm rod so that the vehicle is in the stowed
position.
Replace return filter
Figure 1-12

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12
No.
Name
Torque
1
Connecting bolt between
return pipe and filter
52±5N.m
2
Return filter
-
3
Connecting bolt between filter
and tank
90±9N.m
4
Air filter
-
①Disconnect the connection between main
return pipe and return filter.
②Remove the plug on the return filter.
③Disconnect the connection between the
return filter and the hydraulic tank.
④Remove the old filter and install the new
filter.
⑤Install the main return pipe and plug.
⑥Use the marker pen to note the
replacement date on the Filter Replacement
Record.
⑦Use GCU to operate any arm rod function.
⑧Check filter components for oil leakage.
Replace high pressure filter
△
! Danger of personal injury. Be
careful with hot oil, and contact with
hot oil can cause severe burns.
△
! If the working environment is
dusty, increase the number of times to
perform this step.
This step is performed every 500 hours or every
six hours, whichever comes first.
Replacing the high pressure filter element is
essential for the good performance and service
life of the machine. Dirty or blocked filter may
affect the performance of the machine, and
continuous use will lead to part damage. Filter
element should be replaced more frequently in
harsh working environment.
Park the vehicle on a solid level ground. Lower
the arm rod so that the vehicle is in the stowed
position.
1) Place a suitable container under the filter.
2) Remove the nut at the bottom of the filter
cover with the wrench and remove the filter
cover.
3) Remove the filter element from the filter
cover.
4) Check the seal of the filter cover and
replace it if necessary.
5) Install new high pressure filter element and
tighten it.
6) Scrub off any oil droplets splashed during
installation.
7) Use the marker pen to note the
replacement date on the Filter
Replacement Record.
8) Use GCU to operate any arm rod function.
9) Check filter components for oil leakage.
1.7.2 Platform Weighing Structure
Lubrication
This operation is performed every 500 hours or
every six months, whichever comes first.
Shorten the maintenance interval in harsh
working environments.
Regular lubrication of the platform weighing
structure is necessary to maintain good
equipment performance and safe operation.
Incorrect lubrication will lead to component
damage.

LGMG North America Inc. Maintenance Manual
13
Figure 1-13
Locate the pin grease nipple at the triangle
bracket assembly.
Fill grease until grease spills on both sides of
the triangle bracket assembly. (Lithium base
grease 2#)
Wipe off spilled grease.
1.7.3 Inspection of Fixing Bolts and
Adjusting Bolts of Slewing Reducer
This inspection shall be performed every 500h
or every 6 months, whichever comes first.
An appropriate tightening of fasteners is
essential for the safe operation of the machine,
and if any fastener is loose, machine damage or
other safety hazards may be caused.
Figure 1-14
Tightening torque of bolt 1: 595±55N.m
Tightening torque of bolt 2: 190±19N.m
1.8 Every 1000 Hours
1.8.1 Replacement of Hydraulic Tank
Air Filter
Replace the hydraulic tank air filter every 1000
hours or every year, whichever comes first.
Park the machine on a level ground.
Remove the old air filter and replace it with a
new air filter.
1.8.2 Check Arm Rod Wear-resistant
Slider
Check the fixing and wearing of the
wear-resistant slider once every 1000 hours or
every year, whichever comes first.
1) The slider is located on the surface and
inner wall of the arm rod housing to reduce
friction and keep the arm rod slider in good
condition, which is necessary for safe
machine operation. Improper padding or
continuous use of extremely worn wear
gaskets could lead to component damage
and unsafe operating conditions.
2) Extend the arm rod to check whether the
slider is loose. If the slider is loose, please
tighten the fixing bolt. Check the clearance
between the slider and the arm rod. If the
clearance between the slider and the arm
rod is greater than 1 mm, increase the
gasket to obtain zero clearance and zero
resistance, and replace the slider if
necessary. As for the part number of the
slider gasket, please refer to the Parts
Catalog and select the slider gasket
according to the actual situation. After
adding gaskets, extend and retract the arm
rod several times to eliminate potential
dead points.
1.8.3 Change Drive Axle Reducer Oil
and Gear box Oil
First 500 hours or one year, whichever comes
first, thereafter every 1000 hours.

LGMG North America Inc. Maintenance Manual
14
Change drive axle main reducer oil
Figure 1-15
1. Filler port/sight port
2. Drain port
3. Breather
1. Place a suitable container under the plug 2,
first remove the plug 1, and then remove
the drain plug 2. Drain all oil. Install and
tighten drain plug 2.
2. Fill the specified oil for drive axle to the
lower edge of plug 1. Wait for 5 minutes
before checking the oil level, and fill the oil
to the specified position if necessary. Install
and tighten filler plug 1.
3. Act on each main reducer in the same way.
Change the oil of close-to-wheel
reducer of drive axle
Figure 1-16
1. Turn the wheel so that the plug 4 is in the
highest position and partially unscrew the
plug to release the possible pressure.
2. Rotate the wheel so that the drain plug 4 is
in the lowest position and place a suitable
container underneath. Remove the screw
plug and drain oil.
Figure 1-17
3. Turn the wheel so that the plug 4 is in the
horizontal position. Fill the lower edge of
the filler port with the specified oil.
4. Tighten the plug.
5. Work on each close-to-wheel reducer in the
same way.
Change gear box oil
Figure 1-18
1. Filler port/sight port
2. Drain port
3. Breather
Place a suitable container under the
transfer box.
Remove the plug 1、2 and drain oil.