LGMG T65J User manual

LGMG North America Inc.
Maintenance Manual
T65J/T85J
Mobile Elevating Work Platform
ANSI
！
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.

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LGMG North America Inc. Maintenance Manual
I
Contents
Contents.......................................................................................................I
Chapter 1 Maintenance...............................................................................1
1.1 Compliance....................................................................................... 3
1.2 Inspecting the Pivoting Support ........................................................ 3
1.3 Inspecting the Boom Wear Pad ........................................................ 3
1.4 Inspecting the Wire Rope.................................................................. 4
1.5 Inspecting the Drive Hub Oil Level.................................................... 4
1.6 Inspecting the Hydraulic Oil And Filter .............................................. 5
1.7 Check for Engine Oil Level ............................................................... 6
1.8 Replacement of Engine Oil and Filter ............................................... 6
1.9 Check for Fuel Leakage.................................................................... 8
1.10 Discharge Fuel Filter....................................................................... 8
1.11 Replacement of the Fuel filter ......................................................... 9
1.12 Check for Engine Air Filter............................................................ 10
1.13 Cleaning or Replacement of Air Filter............................................ 10
1.14 Check for Coolant Liquid Level..................................................... 10
1.15 Filling or Replacement of Engine Coolant......................................11
1.16 Check for Engine Belt....................................................................11
1.17 Regular Maintenance.................................................................... 12
1.18 Inspecting the battery ................................................................... 12
1.19 Engine fault table.......................................................................... 14
1.20 Engine fault Codes ....................................................................... 17
Chapter 2 Schematics...............................................................................29

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II
Foreword
Thank you for choosing to use this Mobile Elevating Work Platform from LGMG North America. This
machine is designed according to A92.20-2018.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 North America.
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
Only personnel who have been properly trained and qualified to operate or
maintain this machine can operate, repair and maintain this machine.
Improper operation, maintenance, and repair are dangerous and can cause
personal injury and death.
Before any operation or maintenance, the operator shall thoroughly read this
manual. Do not operate, perform any maintenance or make any repairs on this
machine before reading and understanding this manual.
The user shall load the platform strictly according to the load rating of the
platform. Do not overload the platform or make any modifications to the platform
without permission from LGMG North America.
The operation regulations and preventions in this manual are only applicable for
the specified use of this machine.

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III
Safety Precautions
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.
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.

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LGMG North America Inc. Maintenance Manual
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Chapter 1 Maintenance

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1.1 Compliance
1) You accept the proper training of safety
operation and machine maintenance, and
have corresponding aptitudes.
2) It is necessary to read, understand and
adhere to all safety regulations of this
manual, safety regulations of workplace
and applicable laws and regulations of
government.
3) Protective articles, such as safety helmet,
safety belt, work shoes, goggles and
protective clothing, have been equipped all
over the body, and the physical state is
excellent.
4) Operators can only conduct conventional
inspection and maintenance items as
specified in this manual.
5) Only technical maintenance personnel who
are trained and get corresponding
certificates may complete scheduled
maintenance.
6) Waste and old materials shall be disposed
according to government regulations and
work site rules.
7) Only LGMG North America approved parts
and consumables can be used.
8) Function test shall be always conducted
upon maintenance.
1.2 Inspecting the Pivoting
Support
1) The turntable shall rotate smoothly without
jamming, and meshing play between the
turntable bearing and the swing gearbox is
measured using a feeler gauge, which shall
be between 0.2mm and 0.3mm.
Measurement is conducted every 250 h or
quarterly.
Unscrew bolt 6 and locking nut 5
Turn adjusting bolt 4 to adjust the position
of the swing gearbox
Measure play between the turntable
bearing and the swing gearbox using a
feeler gauge
If the play ranges from 0.2mm to 0.3mm,
tighten lock nut 5 and bolt 6
Measure play between the turntable
bearing and the swing gearbox again to
verify the measurement
Tighten bolt 6, and torque to (595±5)N•m.
2) Check lubrication in the turntable bearing
and the swing gearbox at intervals of 100
hours. It is necessary for maintaining
performance and maintenance life to
lubricate the turntable bearing frequently.
Incorrect lubrication will cause damage to
components.As shown in Figure 11-1, find
the grease port 3 on the side of the bearing,
swing the turntable multiple times while
filling grease until grease overflows from
the upper and lower fixed surfaces of the
bearing. Lubricating grease must be:
Lubrication EP2 or equivalent.
3) Inspect the lubrication of the turntable
bearing and the swing gearbox, if
necessary, clean the gear surface, and
recoat with grease.
△
!Caution: In the case of an extremely dirty
working environment, increase the oil filling
frequency.
1.3 Inspecting the Boom
Wear Pad
1) Inspect the wear pad every 1,000 h or
yearly.
2) The wear pad is located on the housing
surface and inner wall of the boom to
reduce friction. It is necessary for safe
operation of the machine to maintain the
wear pad in good condition. Continuous
use of wear pads that are extremely worn
will result in damage to components and
unsafe operating conditions.
3) Extend the boom to check if the wear pad
loosens, if the wear pad loosens, torque the
securing bolt to: 28Nm. Inspect play
between the wear pad and the boom, if the
play is more than 1mm, arrange shims to

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4
achieve zero play and zero drag. Part
numbers of components and parts of shims:
2522000188 and 2522000314. Refer to the
Parts Manual, and select the correct parts..
Upon installation of the shims, it is
necessary to extend the boom multiple
times to eliminate potential binding.
1.4 Inspecting the Wire Rope
Figure 11-2 Boom Telescope System
1. Cover Plate
2. Extend Rope Anchor
3. Extend Rope
4. Extension Pulley Block
5. Cover Plate
6. Retract Pulley Block
7. Retract Rope
8. Retract Rope Anchor
After long-term operation of equipment, the wire
rope will stretch, resulting in boom sections not
synchronized, separation of wire rope from
pulley, boom shaking during extension, contact
of wire rope to inner wall of boom sections or
rubbing between wire rope and inner wall of the
boom and other problems. It is necessary to
conduct periodic checks on the condition of the
wire rope. Inspect the stretching wire rope for
stretching every 250 h or quarterly.
1) Raise the boom to horizontal, extend the
boom, and inspect if the second-section
and third-section booms are synchronized
in the extension process of the boom. If the
third-section boom lags behind the
second-section boom, this means the wire
rope is loose.
2) Raise the boom to horizontal, extend the
boom, and inspect whether or not the
third-section boom shakes or if there is “flap”
sound from the wire rope whipping the
inside of the boom section during extension.
If this happens, it indicates the wire rope is
loose.
3) Remove the rear cover plate (1) of the
boom, and see if the extend rope anchor (2)
deflects to one side. See if the retract rope
anchor (8) deflects to one side. If deflection
exists, it means the wire rope is loose.
4) Raise the boom to horizontal, extend the
boom completely, remove the rear cover
plate (1) and the side cover plate (5), and
visually inspect for wear on the extension
pulley block (4,) the retract pulley block (6),
the extend rope (3) and the retract rope (7).
The pulley shall be fixed firmly secured
without play, non-uniform wear of the pulley
groove shall be less than 3mm, and the
wear of the pulley flange shall be smaller
than 10% of the original wall thickness.
There must be no loosening, breaks, and
serious corrosion in the wire rope. During
extension and retracting, there must be no
flapping in the pulley. In the case of any
abnormalities, stop using the machine
immediately and tag out the machine.
1.5 Inspecting the Drive Hub
Oil Level
1) Inspect the oil level of the drive hubs every
250 h or quarterly. Improper oil level will
result in reduced performance. Continuous
use will result in damage to components.
2) Inspect oil level
Figure 11-3 Traveling slowdown
1. Oil filler 2. Viewing port
Drive the machine until one plug is located
at the horizontal position as shown as
shown in Figure 11-3.
Remove the viewing port plug at the

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horizontal position, and inspect oil level.
Result: Oil level shall be flush with the
bottom of the viewing port.
If necessary, add oil at the oil filler until the
oil level is flush with the bottom of the
viewing port, select gear oil by referring to
Machine Specifications section.
Coat the plugs with pipe thread sealant and
install the plugs.
Repeat this step for every drive hub.
Figure 11-4 Swing Gearbox
1. Oil filler 2. Viewing port
3) Inspect oil level of swing gearbox
Remove the plug on the side and inspect
the oil level, as shown in Figure 11-4.
Result: Oil level shall be flush with viewing port
(2).
If necessary, add gear oil at the oil filler plug
until the oil level is flush with the bottom of
the viewing port, select gear oil by referring
to the Machine Specifications section.
Coat the plugs with pipe thread sealant and
install the plugs.
4) Replace lubricant after the first 50h of use,
then every 1,000 h or yearly.
1.6 Inspecting the Hydraulic
Oil And Filter
1) Inspect hydraulic oil level every 8 h or every
day.
△
!Caution: Perform this step when
the boom is in the retracted position.
Park the vehicle on the flat site. Fully retract
the boom.
Figure 11-5 Oil Level Sight Gaugel
Examine the oil level on the hydraulic oil
tank, i.e., level shall fall within the M range
shown as Figure 11-5, and in the case of
level lower than L, it is necessary to add
hydraulic oil.
2) Inspect hydraulic oil leakage every 8 h or
daily.
△
!Caution: Personal injury danger,
i.e., leaking hydraulic oil can penetrate
or burn skin. Wear goggles and
protective gloves.
Leakage of high-pressure oil may be
invisible to eyes, use cardboard or wooden
boards as a search tool for hydraulic oil
leakage. Hands shall be prohibited from
being used for leakage confirmation.
Inspect oil drops or residual oil on the
following components:
Hydraulic oil tank, filter, pump, hydraulic oil
cylinder, motor, reduction gear, valve block
and hydraulic tubing.
Inspect oil drops or residual oil at the
following areas:
Rear of boom, fly jib, upper side of turntable,
upper and lower sides of chassis, and ground

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underneath equipment.
1) Test or replace hydraulic oil every 2,000 h
or every two years.
△ !Caution: If the oil isn’t replaced
after the two year interval, it must be
tested quarterly and replaced when it
no longer passes the testing.
1) Replace hydraulic oil suction filter, oil return
filter and high pressure filter every 500 h or
every 6 months. Replace oil suction filter,
oil return filter and high pressure filter after
first 50 h of use. It is necessary to replace
the hydraulic filter to maintain performance
and service life of the machine. Dirt or a
clogged filter may cause performance
degradation of hydraulic components, and
continuous use will cause damage to
components. In dirty work environments it
is necessary to increase the change
intervals..
1.7 Check for Engine Oil
Level
△
!Do not operate on running
engines! No smoking and open fires!
Be careful when contacting with high
temperature engine oil. Danger of
scalding!
△
!When operating on the oil system,
pay attention to the surface cleaning.
Carefully clean all areas involved. Blow
wet parts with compressed air.
△
!Please observe the safety
regulations for engine oil and relevant
local regulations. Dispose of spilled
engine oil and filter elements as
required. Waste oil cannot penetrate
into the ground.
△
!Test run shall be carried out after
each operation. At the same time, pay
attention to the sealing and lubricating
oil pressure, and then check the
engine oil level.
Check the engine oil level every 8 hours or
every day.
Insufficient or excessive engine oil may cause
damage to the engine. The engine oil level can
only be checked when the engine is placed
horizontally and closed. If the engine is hot,
close the engine and check the engine oil level
5 minutes later. Check it immediately if the
engine is cooled.
1) Insert the oil measuring rod and clean it
with a piece of clean and fiber-free cloth.
2) Insert the oil measuring rod into the bottom.
3) Pull out the oil measuring rod and read the
value of engine oil level.
4) The engine oil level shall always be
between MIN and MAX!
Fill up to the maximum liquid level if necessary.
1.8 Replacement of Engine
Oil and Filter
△
!Do not operate on running
engines! No smoking and open fires!
Be careful when contacting with high
temperature engine oil. Danger of
scalding!
△
!When operating on the oil system,
pay attention to the surface cleaning.
Carefully clean all areas involved. Blow

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7
wet parts with compressed air.
△
!Please observe the safety
regulations for engine oil and relevant
local regulations. Dispose of spilled
engine oil and filter elements as
required. Waste oil cannot penetrate
into the ground.
△
!Test run shall be carried out after
each operation. At the same time, pay
attention to the sealing and lubrication
oil pressure, and then check the
engine oil level.
It is available in the first 50-100 hours, and the
engine oil and filter shall be replaced every
1000 hours or a year. (If the ambient
temperature continues to be below -10℃. (14゜
F) or the temperature of engine oil is below 60℃
(84゜F), or the sulphur content in the diesel fuel
is 0.5 - 1%, the oil change period is reduced by
a half; if the engine oil does not reach the
replacement interval period within a year, the oil
shall be replaced at least once a year.)
△
!Danger of burn, be careful of
high-temperature engine parts and oil,
contacting with high temperature
engine oil and/or engine parts will
cause severe burns.
△
!Perform the function after engine
warm up to normal operation
temperature.
Replacement of engine oil-Kubota
engine
△
! After the filter element is replaced,
be sure to keep the engine idling at a
low speed for at least 3-5 minutes, so
that the engine has been lubricated
before being put into operation.
Figure 11-8
1) Warm up and run the engine (engine oil
temperature> 80℃).
2) Place the engine horizontally.
3) Shut down the engine.
4) Place the container under the engine oil
drain plug.
5) Screw off the engine oil drain plug to drain
the old engine oil.
6) Install the new seal ring for the engine oil
drain plug and screw in and tighten it.
7) Add engine oil at the engine oil filler.
8) Warm up and run the engine (engine oil
temperature> 80℃).
9) Place the engine horizontally.
10) Check the engine oil level and fill it if
necessary.
Figure 11-9
Replacement of the Engine Oil Filter
The engine oil filter element must also be
replaced every time the engine oil is replaced.
△
!Never fill the filter in advance. There

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8
is risk of contamination.
1) If a torsion stopper is installed, remove the
clamping clamp (optional).
2) Release and unscrew the filter element with
a wrench.
3) Contain the oil that was drained.
4) Clean the sealing surface of the filter holder
with a clean fiber-free wiper.
5) Apply a thin layer of engine oil to the seal
ring of the new filter.
6) Screw in a new filter manually until seal fit
and tighten it with 10-12 Nm.
Tighten the torque.
7) Fix the clamping clamp of a torsion stopper
(optional).
1.9 Check for Fuel Leakage
△
!The engine must be shut down!
No smoking and open fires!
Be careful when contacting high
temperature fuel!
Please observe the safety regulations for fuel
and relevant local regulations. Dispose of
spilled fuel and filter elements in accordance
with national regulations. The fuel cannot seep
into the ground.
Visually check for fuel leakage every 8 hours or
every day.
△
!There is danger of explosion and
fire. The fuel of the engine is
combustible. Check the position of the
machine. When this step is performed,
the machine shall be away from the
heater, spark, flame, and open and
well-ventilated areas with burning
tobacco. A qualified fire extinguisher
shall be placed in an easily accessible
place.
△
!There is danger of explosion and
fire. If fuel leaks, prevent any additional
person from entering the area or
operating the equipment. Repair the
leakage immediately.
1.10 Discharge Fuel Filter
△
! Risk of explosion and fire. Engine
fuel is combustible. The position
where the equipment is located shall
be inspected. When the step is
executed, equipment shall be located
in an open and well-ventilated area that
keeps away from the heater, spark,
flame and burning tobacco. A qualified
fire extinguisher shall be placed at the
location that is easily accessible.
△
!Perform the step when the engine
flames out.
Check and drain the fuel filter every 8 hours or
every day.
1) Shut down the engine, and find the fuel
filter.
2) Disconnect cable connection.
3) Loosen the drainage plug located at the
bottom of the filter cartridge, allowing the
water drained to an appropriate container.
Once any fuel starts to flow out, screw
down the drainage plug immediately.
4) Wipe up any fuel that may be splashed.
5) Start the engine from the ground control
and inspect whether or not there is leakage
in the fuel filter.
△
!Risk of explosion and fire. Where
there is fuel leakage, prevent any
irrelevant personnel from entering the
area and strictly prohibit operating the

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9
equipment. Repair the leak
immediately.
1.11 Replacement of the Fuel
filter
△
!The engine must be shut down!
No smoking and open fires!
Be careful when contacting high
temperature fuel!
△
!Do not release the injection
pipeline or the high-pressure oil
pipeline when the engine is running.
△
!Carefully clean all areas involved
in cleaning. Blow wet parts with
compressed air.
△
!Please observe the safety
regulations for fuel and relevant local
regulations. Dispose of spilled fuel and
filter elements in accordance with
national regulations. The fuel cannot
seep into the ground.
△
!After completing the operation on
the fuel system, exhaust the system,
perform the trial operation and check
the seal performance.
It is available in the first 50 hours, and
it will be replaced every 500 hours, or
quarters, but an increase in the
number of replacement filters is
required for the extremely dirty work
environment.
△
!There is danger of explosion and
fire. The fuel of the engine is
combustible. Check the position of the
machine. Execution
When this step is performed, the machine shall
be away from the heater, spark, flame, and
open and well-ventilated areas with burning
tobacco.
A qualified fire extinguisher shall be placed in an
easily accessible place.
△
!Never fill the filter in advance.
There is risk of contamination.
Figure 11-10
1) If a torsion stopper is installed, remove the
clamping clamp (optional).
2) Release and unscrew the filter element with
a wrench.
3) Contain the diesel fuel drained.
4) Clean the sealing surface of the filter holder
with a clean fiber-free wiper.
5) Apply a thin layer of diesel to the seal ring
of the new filter.
6) Screw in a new filter manually until seal fit
and tighten it with 10-12 Nm.
Tighten the torque.
7) Fix the clamping clamp of a torsion stopper
(optional).
8) Exhaust the fuel system.

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10
1.12 Check for Engine Air
Filter
Check the maintenance indicator for the air filter
every 8 hours or every day.
△
!Perform this step when the
engine is turned off.
Figure 11-11
Check the maintenance indicator of the air filter.
When the transparency of the indicator turns red,
filter element needs to be maintained and
cleaned or replaced.
1.13 Cleaning or
Replacement of Air Filter
Clean it every 500 hours or half a year.
△
!Do not operate on running
engines!
△
!Be sure to pay attention to the
cleanliness of the external surface
when operating on the engine suction
system, and close the suction inlet
when necessary. The old filter
elements are handled in an
environmentally friendly manner.
Cleaning of air filter
△
!Do not clean the filter element (3)
with gasoline or high temperature
liquid, or replace the filter element.
Figure 11-12
1) Open the locating plate (1).
2) Remove the filter cover (2) and screw off
the filter element (3).
3) Filter element (3): For slight contamination,
purge with dry compressed air (maximum 5
bar) from inside to outside for cleaning
(general cleaning times are no more than 5
times);
Replace it in case of serious contamination.
Replacement of the Safety Filter Tube of the
Air Filter
△
!Never clean the safety filter tube (4).
1) Screw off the hexagon bolt (5) and the
safety filter tube (4).
2) Install the new safety filter tube and screw
on the hexagon bolt.
3) Install the filter element (3), place the outer
cover (2) and fix it with the positioning plate.
1.14 Check for Coolant
Liquid Level
Check the coolant liquid level every 8 hours or
every day.
△
!The coolant at high temperature
has the risk of scald.
The cooling system is under pressure! The
cover can only be opened in the cooling state.

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11
Coolant must have a specified concentration of
cooling system protectant!
Please observe the safety regulations for
coolant and relevant local regulations.
Dispose of the spilled coolant as specified,
without leaving it on the ground.
Never run the engine without coolant, even if it's
a very short time.
1) Carefully open the cover for the cooling
system.
2) The coolant liquid level shall always be
between min and max! Fill up to the
maximum liquid level if necessary.
1.15 Filling or Replacement
of Engine Coolant
Replace it every 2,000 hours or two years.
△
!The coolant at high temperature
has the risk of scald.
The cooling system is under pressure! The
cover can only be opened in the cooling state.
Coolant must have a specified concentration of
cooling system protectant!
Please observe the safety regulations for
coolant and relevant local regulations.
Dispose of the spilled coolant as specified,
without leaving it on the ground.
Never run the engine without coolant, even if it's
a very short time.
Draining of the Cooling System
1) Carefully open the cooler cover.
2) Place the receiving container under the
coolant interface.
3) Drain the coolant.
4) Reconnect and tighten the coolant
interface.
5) Close the cooler cover.
Filling of the Coolant
1) Carefully open the cover for the cooling
system.
2) Loosen the cooler exhaust bolts that may
be present.
3) Fill the coolant to max or the filling limit
position.
4) Open the possible heater and switch to the
maximum gear, to fill the heating circuit and
exhaust.
5) Close the cooler cover.
6) Run the engine to the running temperature.
7) Shut down the engine.
8) Check the coolant liquid level when the
engine is cooled, and fill it to max if
necessary.
1.16 Check for Engine Belt
Check it every 8 hours or every day.
△
!Only when the engine is stationary
can the belt drive operation be carried
out.
△
!There is danger of burn. Be
cautious of high-temperature engine
components. Contact with them may
cause serious burn.
Belt Check
1) Visually inspect whether all belt drives for
damage.
2) Replace damaged components.
3) Reinstall the protector if necessary.
4) When it is a new belt, check whether the
position is correct. After running for 15
minutes, check the tension.
Replacement of belt

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12
Figure 11-13
1) Loosen bolts (1,2,3) and nuts.
2) Move the engine in direction B, until the belt
is lose.
3) Remove the old belt, and install a mew one.
4) Move the engine in direction A until the
correct belt tension is reached.
5) Check the belt tension.
6) Tighten the bolts and nuts.
1.17 Regular Maintenance
Maintenance items with period of a quarter, a
year, and two years must be completed by
qualified staff upon training in maintenance of
the machine in accordance with procedures in
the machine maintenance manual. For
machines that are idle for more than three
months, quarterly check must be performed
before they can be re-used.
1.18 Inspecting the battery
△
!Danger: Explosion Danger!
Electric Shock Danger! Burn Danger!
Keep away from fire, remove all rings,
watches and other jewelry. If necessary,
wear goggles, protective gloves and
protective clothing. Avoid contacting
overflowed electrolyte, and neutralize
any overflowed electrolyte with sodium
bicarbonate solution.
It is crucial for machine performance and
security-related operations to keep the battery
in proper condition. Improper voltage or
damaged cables and wires may cause damage
to components and danger. Inspect the battery
every 8 hours or daily.
Ensure the battery hold down hardware is
secure.
Inspect the battery cables for corrosion.
Inspect for fluid leaks, and whether or not
the battery is dry and clean.
As shown in Figure 11-7, inspect the color
of the battery hydrometer (if applicable):
Hydrometer
Color
Meaning and Handling
Method
White
Lack of battery fluid,
please shut down the
machine, and stop using
Black
Lack of electricity
Green
Measure the voltage of
each battery, and voltage
lower than 11V indicates
damage to battery; and
voltage between 12.4V
and 12.7V indicates that
the battery is in good
state
Table 11-1Color and description of hydrometer
color
If the battery hydrometer’s color is green,
and voltage is more than 12V, but cannot drive
the starter, further check the battery circuits by
personnel with machine maintenance training
and certified to perform such work.
△
!Caution: If charging the battery
with an external power supply, only

LGMG North America Inc. Maintenance Manual
13
use a charger accepted by LGMG
North America.
11.9 Periodic maintenance
1) Maintenance items every quarter, every
year and every two years must be
performed by personnel with machine
maintenance training and certified to
perform such work.
2) A machine not used for a time exceeding
three months must not be put into use
again until a quarterly inspection and
maintenance have been performed.
Figure 11-7 Battery hydrometer
Hydrometer

LGMG North America Inc. Maintenance Manual
14
1.19 Engine fault table
Faults
Cause
Measures
Engine does not start or is difficult to
start
Not disconnected (if possible)
Check coupling
Engine does not start and diagnostic
lamp flashes
Fuel tank empty
Tanks
Fuel suction pipe blocked
Check
Below starting limit temperature
Check
Cold starting device
Check/replace
Wrong SAE viscosity class of the
engine lubricating oil
Change the lubricating oil
Fuel quality does not comply with
operating manual
Change the fuel
Battery defective or discharged
Check battery
Cable connection to starter loose or
oxidized
Check cable connections
Starter defective or pinion does not
engage
Check starter
Air filter clogged / turbocharger
defective
Check/replace
Air in fuel system
Vent fuel system
Compression pressure too low
Check compression pressure
Exhaust gas backpressure too high
Check
Injection line leaks
Check injection line
High-pressure pump defective
Check/replace
Engine does not start and diagnostic
lamp flashes
Engine electronics prevents starting
Check error according to error code
and eliminate error if necessary
Engine starts, but runs irregularly or
fails
Exhaust gas backpressure too high
Check
Compression pressure too low
Check compression pressure
Cold starting device
Check/replace
Air in fuel system
Vent
Fuel filter contaminated
Clean
Fuel quality does not comply with
operating manual
Change the fuel
Injector defective
Change
Injection line leaks
Check injection line
Engine cable harness defective
Check/replace
Speed changes are possible and
diagnostic lamp lights up
Engine electronics has detected a
system error and activates an
equivalent speed
Check error according to error code
and eliminate error if necessary
Engine becomes excessively hot.
Temperature warning system activates
Vent line blocked
Clean
Lube oil cooler defective
Check/replace
Lube oil filter contaminated on the air
or lube oil side
Change
Lube oil level too high
Check lube oil level, if necessary drain
off.
Lubricating oil level too low
Fill up lube oil