1repair & maintenance_englisg-g9165
DESCRIPTION
REPAIR & MAINTENANCE MOTOR GRADER SDLG G9165TRANSCRIPT
Service Manual of G9165 Grader
1 Repair & Maintenance
SERVICE MANUAL
Service Manual for G9165 Grader
I
CONTENTS
1 Repair & Maintenance ......................................................................................... 1-1
11 Oil, Coolant and Others ....................................................................................... 1-1
111 Fuel .............................................................................................................. 1-1
112 Coolant ......................................................................................................... 1-2
113 Lubricant ...................................................................................................... 1-2
114 Storage of Oil and Fuel ................................................................................ 1-3
115 Filters ........................................................................................................... 1-3
12 Selection of Oils .................................................................................................. 1-4
121 Oil Application ............................................................................................ 1-4
122 Notes for Oil Application ............................................................................ 1-5
13 Maintenance ......................................................................................................... 1-6
131 Precautions before Maintenance.................................................................. 1-6
132 Periodic Maintenance ................................................................................ 1-10
133 Maintenance & Repair ............................................................................... 1-16
Service Manual for G9165 Grader
1-1
1 Repair &
Maintenance
11 Oil, Coolant and Others
ATTENTION
Change oil as soon as the oil is deteriorated
or is mixed with many impurities.
Add the specified volume of oil. Either too
much or too little oil may cause problems.
Clean or replace the relevant filters when
changing oil.
111 Fuel
The fuel pump is a precision instrument. If the
fuel mixes with water or dirt, the fuel pump
will not work normally.
Never let impurities or contaminants enter the
system when changing fuel filters or adding
fuel.
Strictly choose the fuel type according to
recommendations in this manual.
The fuel may be frozen at low temperatures
(particularly temperatures lower than 5°F
(-15°C)). So it may be necessary to change the
kind or blend of fuel according to the ambient
temperatures. Refer to Table 1-1 in this
chapter for details.
Always fill up the fuel tank after operating to
prevent water, which is condensed by the
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1-2
moisture in the air, from entering the fuel tank.
If the engine fails to prime with fuel or the
filters have been just replaced, purge the air in
the fuel inlet system.
112 Coolant
In order to keep sediment from blocking the
radiator and affecting the thermal performance,
use high quality glycol type antifreeze mixed
at the proper proportion with distilled water;
do not use straight water as coolant.
If the engine is overheating, the engine should
be cooled down first, then topped off with
coolant
Coolant should be added to the specified level,
if the coolant level is too low, it will result in
engine overheating and corrosion problems of
cooling system.
Antifreeze is combustible, stay away from
open flame when filling it.
It is required to choose the kind or type of
antifreeze according to the ambient
temperatures. Refer to Table 1-1 in this
chapter for details.
113 Lubricant
Lubricant can help to prevent the wear of
fitting surface and noise.
The connectors (pipe joint, connecting set) that
are not involved in this manual are only for
overhauling and not need to add lubricant. But
be sure to fill the lubricant if some parts are
difficult to operate after a long time using.
Clean the spilled lubricant after filling.
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114 Storage of Oil and Fuel
Prevent water, dirt, or other impurities from
mixing with the oil.
Follow the rule, first in - first out, to maintain
oil quality during long-term storage.
115 Filters
Filters are extremely important safety
components. They can prevent impurities in
the fuel from entering important equipment
and causing problems. Replace filters at
shorter intervals when the machine works in a
severe environment.
Never try to clean paper filter elements and
use them again. Always replace them with a
new one.
When replacing the oil filters, check whether
there are some metallic particles adhering to
the old filter. If some metal particles are found,
investigate and repair.
Never open the packaging of new filters until
they are ready to be used.
Always use authentic filters.
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1-4
12 Selection of Oils
121 Oil Application
Use the oil in strict accordance with the rules
about specified brand and quantity. (Refer to
Table 1-1).
Clean the oiler or container before filling the
fuel, hydraulic oil, grease and clean the filling
ports to prevent water, sludge and debris
entering into the oil.
Except for the grease, use a filter for filling.
Fill grease until there is grease squeezing out
of the filling point. And wipe the spilled
grease.
When replacing oil, drain the contaminated oil
out after operation. Fill cleaning oil and keep
the engine running idly for several minutes to
clean all the parts. And then fill the new oil
and keep the engine running at low speed.
Finally, fill the oil to the specified level. The
fuel tank should be cleaned regularly.
In different seasons, replace the oil or grease
according to the actual situation. Refer to
Table 1-1 in this chapter for details.
When filling oil or checking the oil level, put
the grader in a horizontal position. Apart from
the oil dipsticks and other pointers, the oil
level should be in the middle part of the oil
window, such as the drive axle, balance tank,
turbine box.
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Table 1-1 Oil selection table
Kinds of
Fluids Season Recommended Types And Standards
Application
point Qty.
Fuel
Ambient temperature≥4oC 0# common
diesel oil GB252
Ambient temperature≥-5oC -10# common
diesel oil GB252
Ambient temperature≥-14oC -20#
common diesel oil GB252
Ambient temperature≥-29oC -35#
common diesel oil GB252
Fuel tank 170L
Engine oil Full year CH-4 15W-40 Engine oil pan 16L
Hydraulic oil Full year Anti-grinding hydraulic oil L-HM46 Hydraulic oil
tank 132L
Gear oil Full year Heavy load vehicle gear oil(GL-5) 85W/90
GB 13895
Rear axle and
balancing boxes 28+23×2L
Transmission
oil Full year Diesel engine oil CH-4 15W-40 (Delo Gold)
Transmission
box 28L
Grease General lithium based grease EP2 GB
7324
All articulated
points ——
Antifreeze Full year -35# ethylene glycol-based engine coolant
NB/SH/T0521 Water tank 24L
122 Notes for Oil Application
Diesel oil in the fuel tank must be added
timely to prevent cavitation. Check whether
the fuel tank is contaminated, whether there is
sediment, and clean the oil filter every mouth.
The engine oil must be changed regularly
because the mechanical impurities in the oil
will increase over time, main causes are:
oxidation after wear, residual ballast in the
cylinder after combustion, and the dust from
outside.
When the impurity content reaches 0.4~0.5%,
oil begins to become black, physical and
chemical index will deteriorate. Replace the oil
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1-6
in hot state.
Check the cleanliness of hydraulic oil
regularly. Method: Take a few drops of oil
from the tank and drops the oil on the filter
paper (240mesh). If the paper presents a light
yellow circle, it proves that the oil can
continue to use; If the yellow circle on paper is
obvious, and the center is black, it proves the
oil is polluted and need to be replaced.
Fill the new oil through the oil filter, and do
not fill the oil directly into the fuel tank. Never
allow several brands of hydraulic oil mixed to
use. The crude oil must be cleaned when
replacing the oil.
13 Maintenance
131 Precautions before Maintenance
Put the machine in maintenance position (refer
to Page 10 in Safety & Environment).
Perform the maintenance on hard and level
ground.
Set all control levers/handles to the Neutral
position.
Pull up the parking brake handle to set the
loader in the parking brake state.
Wedge the tires with blocks.
Lock the front and rear frames with frame
locking bars.
Use warning tags
Hang a do-not-start-engine tag near the ignition
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1-7
switch before performing maintenance or repairs to
prevent inadvertent engine or machine movements.
Use genuine parts
It is highly recommended to use only genuine parts
specified by the manufacturer.
Use high quality and premium specification oils
and fuels
Use oils and fuels specified in this manual and
according to local ambient temperatures and
machine use conditions.
Use clean fluid containers for oils and fuels
Keep containers of oils and fuels clean and make
certain to use specified oils and fuels.
Keep the machine clean
Always keep the machine clean. Keep grease
fittings, pipe joints, oil level gauges, and fluid fill
caps/openings clean to prevent foreign materials
from entering these systems.
Pay attention to high-temperature oil and
coolant
It is very dangerous to drain hot oils or engine
coolant, or to remove the filters immediately after
the engine stops. Make sure the engine is cooled
down to ambient temperature. Always drain oils
when they are at temperatures of approximately
68~104°F (20~40°C), as this will ensure complete
system drainage. If the oil temperatures are lower
than this temperature, it is recommended to warm
it up to this temperature before draining it.
Inspect the oil and filters
After any systems oils are changed or filters are
replaced, inspect the oil and filters. If large
amounts of metallic particles or impurities are
found, investigate and repair.
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Retain the fuel fill strainer
Do not remove the fuel strainer while fueling.
Practice clean oil changing
Change oil in a dust-free place to keep impurities
and contaminants out of the oil.
Welding guide
Turn off the starting switch of the engine, and
the main battery switch, and remove the
battery cables from their terminals.
Disconnect all ECU connections.
Keep the distance between the grounding cable
line and welding area no more than 39in (1m).
Avoid welding near seal rings and bearings.
Never weld any pipe or take that has fuel or oil
in them.
Fire prevention
When cleaning any parts or components, use
non-flammable cleaners or light oil. Keep sparks
and cigarette lighters away from them.
Seals
When replacing O-rings or gaskets, clean the
sealing faces first, and make sure the O-rings and
gaskets are in the correct assembly position.
Inspect the front and rear frames
After a long period of operation, check for damage
of the undercarriage, frames, center joint, and for
loose or damaged bolts and nuts.
Precautions to use while washing the machine
Do not wash the machine with a hot or warm
engine. Let it cool down.
Do not allow water to spray on any electrical
components.
Machine cleaning after inclement weather
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1-9
operations
Clean the machine immediately after working in
rain and snow. Lubricate and coat anti-rust oil to
components.
Environments with airborne contaminants
Do the following when the machine works in
conditions with airborne dust or chemicals:
Inspect and clean air filter frequently to avoid
restricted inlet air.
Clean the radiator frequently to avoid
blockages and overheating.
Clean and replace fuel filter frequently.
Clean the electric components, especially the
starting motor and alternator to avoid
accumulation of dust affecting dissipation of
heat.
Refer to the accompanying Maintenance
Manual for Diesel Engine for maintenance
and replacement of air filter.
Avoid using mixed oil
Never use oil mixed from different brands. If using
a different kind of oil from the one previously used,
drain the oil from the machine, and fill with the
new brand oil completely.
Service Manual for G9165 Grader
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132 Periodic Maintenance
Fig. 1-1
A new machine must have a running-in period
of 50h. And you should choose good road for
the running-in period.
After starting the engine, avoid accelerating
suddenly; start operation when the water
temperature gets to 50oC. When driving, do
not accelerate to climb the slope.
Avoid emergency brake or using the brake for
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1-11
a long time.
You should properly carry out the maintenance
tasks before, during and after run-in period.
Do not operate the grader in full power in the
first 50~100h period. It is allowed to operate
the grader in full power in the second 50~100h
period, but the time could not be too long.
In the first 200 working hours, you should
check the engine oil level twice a day (10h).
When filling the grease to the transmission
shaft, inject the grease with low pressure rather
than high pressure to avoid too much overflow.
Fill until there is grease squeezed out of the
fitting area.
When working in dusty environment, you
should clean the water tank and radiator fins
frequently, be sure to shorten the maintenance
cycle and increase the maintenance times
according to real conditions.
Important! Check the oil level often.
Periodic maintenance is divided into every 10 hour
maintenance, every 50 hour maintenance, every
100 hour maintenance, every 250 hour
maintenance, every 500 hour maintenance, every
1000 hour maintenance, every 2000 hour
maintenance, and every 3000 hour maintenance.
Every 10 hour maintenance
Clean the grader: Clean the dust and ash on the
surface of grader; Clean the dust and oil on the
surface of parts and hydraulic components. Do
not let dirt enter oil filling port and air filter.
Check the connection and fixing of the parts of
grader. Check whether the connecting bolts
between frame and rear axle and hub are loose
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or broken. Fix or replace the loose or broken
parts.
Check the grader for leaking phenomenon and
eliminate the problem.
Check hydraulic oil level and add specified
new oil if necessary.
Every 50 hour maintenance
ATTENTION
Before putting a new grader into operation,
a running-in period of 50 hour is required.
Follow the instructions in Operation and
Maintenance Manual of Diesel Engine to
perform the running-in. After the
running-in period, maintain the machine as
per the instruction s below:
Complete the tasks of the 10 hour periodic
maintenance indicated above.
Check the tire pressure, check the wheel nuts.
Check hydraulic oil level and fill hydraulic oil
to specified level.
Check if there is leakage in the hydraulic
system, remove the problem if so, and fill
hydraulic oil to specified level.
Every 100 hour maintenance
Complete the tasks of the 10 hour and 50 hour
periodic maintenance indicated above.
Check the intake system and exhaust system,
and ensure the connectors are connected firmly.
Clean the intake and exhaust pipes if
necessary.
Check the parking brake system and adjust it if
necessary.
Check whether the connection of steering
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mechanism is loose, including nuts of steering
linkage, tighten them.
Tighten wheel nuts.
In addition, do the extra maintenance in the
first 100 hour as follows:
Replace the gear oil in rear axle. Drain all the
oil radically after warming up the grader and
then fill the new oil. (Do this maintenance
every 1000h thereafter)
Clean transmission box oil pan, oil absorption
strainer therein, and filter elements in torque
converter-transmission box oil line, replace the
transmission oil. (Do this maintenance every
500h thereafter)
Check the guide clearance of blade and adjust
it if necessary.
Tighten the wheel nuts.
Check the tension of chain of balancing box. If
it is loose, tighten it.
Every 250 hour maintenance
Complete the tasks of the 10 hour, 50 hour and
100 hour periodic maintenance indicated
above.
Check the oil level of main drive and
balancing box, add if necessary.
Remove the dust inside the generator with
compressed air and check whether the parts are
normal, and eliminate the problem if not.
Check the guide clearance of rotary frame and
adjust it if necessary.
Replace the fuel filter element.
Replace the air filter element.
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Every 500 hour maintenance
Complete the tasks of the 10 hour, 50 hour 100
hour and 250 hour periodic maintenance
indicated above.
Clean transmission box oil pan, oil absorption
strainer therein, and filter elements in torque
converter-transmission box oil line, replace the
transmission oil.
Check whether the circuits of switches and
control monitoring device are normal. Repair
if damaged.
Check whether the clearance of transmission
box to rear axle transmission shaft, engine to
working pump transmission shaft and the
cardan shaft are oversized.
Replace the fuel pre-filter element.
In addition, do the extra maintenance in the first
500 hour as follows:
Replace hydraulic oil filter elements. (Do this
maintenance every 1000h thereafter)
Replace the filters in brake system. (Do this
maintenance every 1000h thereafter)
Every 1000 hour maintenance
Complete the tasks of the 10 hour, 50 hour 100
hour, 250 hour and 500 hour periodic
maintenance indicated above.
Replace hydraulic oil. Replace hydraulic oil
return filter element. Clean the oil absorption
strainer.
Replace the filters in brake system.
Replace the rear axle oil. Warm up the
machine and empty the axle, and fill new
lubricating oil into the axle.
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Check whether the bearing of fan transmission
shaft and the tension wheel of belt are worn
seriously.
Engine should be maintained specially if the
ambient temperature is lower than 5°C.
Choose fuel that applicable to winter and
pay attention the water content in the fuel
in case of blockage of fuel circuit.
Be sure to use antifreeze (coolant)
specified by SDLG all year round. Use
water as coolant is strictly forbidden.
In cold season and areas, it is better not to
park the grader in an open area. Otherwise,
you need to preheat the engine before
starting.
Every 2000 hour maintenance
Complete the tasks of the 10 hour, 50 hour 100
hour, 250 hour, 500 hour and 1000 hour
periodic maintenance indicated above.
Replace the antifreeze, replace it every 2000
working hours or once a year, whichever comes
first.
Every 3000 hour maintenance
Complete the tasks of the 10 hour, 50 hour 100
hour, 250 hour, 500 hour, 1000 hour and 2000
hour periodic maintenance indicated above.
Clean the cooling system.
Clean the engine oil cooler.
Check the water seal in water pump, fill
grease.
The maintenance principles listed above are the
basic requirements. If the working condition is
very severe, please shorten the maintenance
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cycle and increase the maintenance times
according to the real conditions. Maintain the
diesel engine according to requirements in
operation and maintenance manual of diesel
engine strictly
133 Maintenance & Repair
Draining of transmission box oil
Overhaul the machine after it is cooled.
1. Remove the oil drain plug to discharge the
transmission oil into a clean vessel.
2. Clean the oil drain plug, coat it with sealant
and retighten it.
2
Fig. 1-2
1 Oil dipstick 2 Oil drain plug
3 Oil filling port
1 3
1
Fig. 1-3
1 Oil drain plug
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3. After filling new oil into the transmission box,
put the transmission lever (gear selector) in the
neutral “N” position, start engine and let the
engine run idly for several minutes (about
1000rpm).
4. Loosen the oil dipstick clockwise and remove
the oil dipstick. Clean it. Insert the oil dipstick
and tighten it. Then take it out to read the oil
level (do this at least twice).
When the oil temperature is 104°F (40°C), oil
level should be between bottom scale and
middle scale (ZONE COLD).
When the oil temperature is 176°F (80°C), oil
level should be between highest scale and
middle scale (ZONE HOT).
Replacement of transmission oil filter
Overhaul the machine after it is cooled.
1. Drain the oil out and then remove the filter.
2. Install new filter and tighten it according to the
instructions described in the related manual.
1 2
Fig. 1-4
1 Oil filling port 2 Oil dipstick
1
Fig. 1-5
1 Oil dipstick
1
Fig. 1-6
1 Transmission oil filter
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1-18
Clean the oil absorption filter screen of
transmission box
1. Remove the cover and clean the internal parts.
Check and ensure the parts are not damaged.
2. Install a new gasket between cover and
transmission box
3. Reassemble the absorption screen.
Draining and filling of drive axle oil
Wear protective equipment to prevent burns
caused by uncooled engine oil.
1. Remove the oil drain plug to discharge the
transmission oil into a clean vessel.
2. Clean the oil drain plug and retighten it.
3. Fill new oil into the axle via the oil filling port
to specified level. Install and tighten the oil
filler plug.
Axle oil: approx. 28L
4. The oil level can be checked via the oil level
hole, a bit of spilled oil is allowed. The lower
limit is about 8mm to the edge of the hole.
1
Fig. 1-7
1 Oil absorption filter screen location
1 2
Fig. 1-8
1 Oil level hole 2 Oil filling port
3 Oil drain plug 4 Vent cap
2 4
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Draining and filling of balancing box oil
1. Screw off the oil drain plugs on bottom of the
balancing box (each balancing box has two
oil drain plugs)
2. Clean the plugs, and install each plug with
new seal ring. Tighten the plugs.
3. Remove the vent cap and fill new oil into the
balancing box via the oil filling port to the
bottom edge of the oil level hole (the oil is
about to overflow from the hole). The volume
of each balancing box is about 23L.
4. Install and tighten the vent cap.
5. Keep the axle in horizontal position when
filling.
Tensioning of balancing box chain
1. Remove the two cover plates.
1
Fig. 1-9
1 Oil drain plug
3
Fig. 1-10
1 Oil filling port 2 Vent cap
3 Oil level hole
1 2
1
Fig. 1-11
1 Cover plate
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2. Lift up the balancing box assembly and
support it.
3. When the train is pulled, its elongation will
increase. If the sag of the loose side of chain
is greater than 18mm, the chain needs to be
re-tensioned.
ATTENTION
There are two chains in each balancing box,
the two chains need to be inspected
together. Tensioning of the chains can only
be performed by professionals.
Tensioning of the chain is realized by rotating the
eccentric bearing cap. As per the steps below:
3.1 Support the balancing box assembly to keep
the wheels off ground. Empty the balancing
box.
1
Fig. 1-12
1 Balancing box
Fig. 1-13
1
Fig. 1-14
1 Oil drain plug
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3.2 Remove the rear wheel.
3.3 Remove the drum brake.
3.4 Remove the oil cup, and install a M10 bolt to
the hole instead, screw the bolt into the hole
for about 5~8 circles.
ATTENTION
The bolt is used to prevent the chain wheel
and shaft module from slipping away from
the tapered roller bearing.
1
Fig. 1-15
1 Rear wheel
1
Fig. 1-16
1 Drum brake
1
Fig. 1-17
1 Oil cup
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3.5 Remove the fixing bolts of the connecting
plate.
3.6 Remove the fixing bolts of the bearing seat.
3.7 Rotate the connecting plate and bearing seat
in the same direction for the same angle until
the sag of the loose side is about 11.5mm.
ATTENTION
Before disassembling the connecting plate
and bearing seat, you should mark their
positions. During rotating the connecting
plate and bearing seat, be careful to avoid
damaging the O-rings.
3.8 After the adjusting, install the removed parts
orderly.
3.9 Fill oil into the balancing box and reassemble
the cover plates.
3.10 Adjust and deflate the brake system.
1
Fig. 1-18
1 Connecting plate
1
Fig. 1-19
1 Bearing seat
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Replacement of hydraulic oil
1. Lower the shovel blades to the ground and
raise the front bulldozing plate to the highest
position.
2. Shut down the engine, and operate the control
handle to lower the front bulldozing plate to
the ground.
3. Place an oil collection container under the
drain valve; Open the drain valve to discharge
the hydraulic oil into the container. Close the
valve after all oil is discharged.
4. Open the return oil filter cap and fill specified
hydraulic oil into the tank until the oil level
pointer points at the middle position.
5. Install the filter cap.
6. Start the engine and operate the control
handles repeatedly to fill the hydraulic system
with oil and bleed the air out
7. Lower all working devices to the ground, shut
down the engine and deflate the hydraulic oil
tank.
8. Check the oil level via a round oil level pointer
and add when necessary.
Hydraulic oil: 132L
ATTENTION
Special attention should be paid to the
sealing of the filter mouth, and the seal
ring should be replaced when necessary. To
prevent damaging the fine thread on filter
cap, be careful when installing the cap.
The hydraulic oil should be replaced
periodically. Additionally, during repairing
or working in dusty environment, let one
Fig. 1-20
1 4
2 3
Fig. 1-21
1 Return oil filter 2 Oil level pointer
3 Oil drain valve 4 Air filter
1 2
Fig. 1-22
1 Oil return flange
2 Oil absorption flange
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drop of the hydraulic oil fall on a filter
paper or blotting paper, if an obvious black
spot appears a few hours later, then the oil
must be replaced to avoid damaging the
hydraulic system.
Replacement or repair of working/steering
pump
1. Open the oil drain valve on bottom of
hydraulic oil tank to discharge the oil.
2. Replace or repair the working/steering pump.
3. Close the oil drain valve and fill hydraulic oil
to specified level after the replacement or
repair.
Replacement of return oil filter element
1. Remove the filter cap.
2. Take out the entire filter element.
3. Replace the filter element with a new one and
assemble it.
ATTENTION
When installing the filter assembly, you
must be careful to avoid damaging the seal
ring. Tighten the filter cap slowly and
carefully.
1 2
Fig. 1-23
1 Steering pump 2 Working pump
1
Fig. 1-24
1 Return oil filter cap
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Cleaning of fuel tank
1. Use kerosene to clean the fuel tank caps and
filter screens carefully.
2. Loosen the oil drain plug on the bottom of
fuel tank to discharge the kerosene into a
container. Retighten the plug after the
draining, and pay attention to check whether
the seal is normal.
ATTENTION
The fuel tank should be cleaned with
specified volume of kerosene (about a
quarter of the fuel tank volume). Before
the cleaning, you should keep the grader
running for a while to let the sediments in
the fuel tank gather.
Fuel filling
1. There should be no smoking or open flame
near the fueling site, and the engine must be
stopped.
2. To avoid condensation of water vapor in the
air, be sure to fill up the fuel tank.
3. Remove the filler cap.
4. Install the filler cap immediately after the
filling to prevent contamination.
1
Fig. 1-25
1 Oil drain plug
1 2
Fig. 1-26
1 Fuel filler 2 Fuel filter assembly
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Engine oil draining
1. Do the maintenance after the machine is
cooled.
2. Place the empty container under the engine
and remove the oil drain plug.
Replacement of fuel filters
1. Remove the filters with filter wrench.
2. Coat the new filter seals with new engine oil.
And tighten them according to the
requirements described in the filter manual.
3. Deflate fuel system after the replacement.
Replacement of engine air filter
1. Maintain or replace the main filter when the
filter is blocked and the alarm is triggered.
2. When maintaining the main filter element, it is
not necessary to remove the safety filter
element, because the safety filter element is
maintenance-free.
3. If the main filter element has been maintained
3 times or the alarm indicator is still on after
the maintaining, the main filter element and
safety filter element should be replaced at the
same time.
1
Fig. 1-27
1 Oil draining port
1 2
Fig. 1-28
1 Coarse fuel filter (pre-filter)
2 Fine fuel filter
1
Fig. 1-29
1 Air filter
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Engine oil filling
Fill the engine oil to the specified level. Oil level
should be between “MAX” mark and “MIN” mark
on the oil dipstick.
Engine oil: 16L
Transmission belt checking
1. Use a gauge to check tensioning condition of
belt.
2. Check whether the belt is worn, and replace it
if necessary.
1 2
Fig. 1-30
1 Engine oil filling port
2 Engine oil dipstick
1
Fig. 1-31
1 Belt
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Lubrication and adjustment of front wheel
bearing
1. Jack up the front axle and remove the front
wheel(s).
2. Remove the inside hexagonal bolts, and take
down the end cover.
3. Use a puller to remove the hub.
1
Fig. 1-32
1 Front wheel
1
Fig. 1-33
1 Inside hexagonal bolt
1 2
Fig. 1-34
1 Puller 2 Hub
Service Manual for G9165 Grader
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4. Rinse the hub, front wheel spindle, bearing
and end cover, replace the seal rings with new
ones.
5. Fill lubricating grease, install the hub and
check the bearing clearance.
6. Install the end cover fixing bolts, tighten the
inside hexagon bolts orderly and crosswise.
7. Check and make sure that the hub can rotate
freely and smoothly, without runout and
vibration.
ATTENTION
Maintaining of the front wheel bearing can
only be performed by professionals.
Lubricating grease: about 280g for
each wheel
Lubricating grease: common lithium
lubricating grease EP2 GB 7324
Adjusting of shovel blade rotary gear ring
1. Axial adjustment of rotary frame
Loosen the lock nuts and fixing nuts on
bottom of clamp plate. Take down the
rotary gear ring guide plate.
Change the number of adjusting gaskets
and use a feeler gauge to ensure the axial
clearance between the bottom of rotary
frame and wear-resisting nylon is within
1~2mm.
Tighten the fixing nuts to 755±45Nm,
and tighten the lock nuts.
Assemble the guide plate.
1 2
Fig. 1-35
1 V-shape seal ring
2 Seal ring
1 2
Fig. 1-36
1 Clamp plate 2 Guide plate
Service Manual for G9165 Grader
1-30
2. Radial adjustment of rotary frame
Loosen the nuts and bolts to adjust the
guide plate.
Tighten the nuts to 755±45Nm.
Perform turning trial, and make sure the
rotary ring can turn 360 degrees freely.
Maintenance of tires
1. Check the tires daily for cut, crack and
penetration of sharps things, and remove all
foreign matters immediately.
2. Prevent the tires from being corroded by fuel,
engine oil and lubricating grease.
3. The inflation valve must be installed with
mesh cap to avoid intrusion of impurities.
4. Leaking valve elements should be replaced
with new ones.
5. Check the tire pressure periodically, too high
or too low pressure will cause severe wear or
unilateral wear.
6. Inflation pressure for front tire is 0.21MPa,
while that for rear tire is 0.25MPa.
1
Fig. 1-37
1 Guide plate
Service Manual for G9165 Grader
1-31
Maintenance of storage battery
G9165 grader is equipped with two 6-QW-70B
maintenance-free storage batteries, the two
batteries are connected in series. You must check
the electric quantity of the battery after long-term
storage (more than 6 months). You should also
check the fixation state of the batteries constantly
to prevent looseness.
1. Inspection of battery electric quantity
The “battery eye” can be used to determine
the battery electric quantity: Check the
color of “battery eye”, if the “battery eye”
indicates green, it means the battery is fully
charged; if the “battery eye” indicates
black, then the battery power is low.
If the “battery eye” turn white, then there
might be bubbles in “battery eye”,
waggle the battery gently to drive the
bubble away. If the “battery eye” still
indicates “white” after waggling, then the
battery should be replaced.
2. Disassembly and assembly of storage battery
When disassembling, disconnect the
negative wire (-) first, and then
disconnect the positive wire (+).
When assembling, connect the positive
wire (+) first, and then connect the negative
wire (-).
The battery must be fixed on the grader
firmly, and connected to electrical system
correctly. Coat the terminals with some
Vaseline to prevent electric erosion.
1
Fig. 1-38
1 Storage battery
1
Fig. 1-39
1 Battery eye
Service Manual for G9165 Grader
1-32
Long-term storage of the grader
1. If the grader is going to be stored for long
time, you should clean and lubricate it
thoroughly. Coat the fine finished surfaces
with lubricating grease and coat the piston
rods with a thick layer of Vaseline, and warp
them up as far as possible.
2. It is better to park the grader in a shed or
house, to prevent the tires from exposing to
strong sun light and moisture, and you must
check the tire pressure regularly.
3. If the grader is going to be parked in the open
air or on uneven ground, it is better to jack up
the machine with wood block to deload the
tires, and then reduce the tire pressure by half.
In the meantime, cover the tires to avoid direct
sun light exposure.
4. To avoid corrosion, the fuel tank should be
filled up with fuel, add preservative (10% of
the total fuel quantity) if the conditions permit.
5. It is reasonable to run the grader periodically.
Run the grader every other week to warm it up,
if possible, jack the machine up to engage the
transmission gears.
6. If the grader is going to be stored for more
than four weeks, you should remove the
batteries and put them in dry and warm place,
and charge them every month.
Reset the grader back to working state
If the grader is out of work for about a year, you
should replace the hydraulic oil, transmission box
oil, axle oil, balancing box oil and engine oil
before putting it into operation again.
1. Recover the machine in the maintenance
Service Manual for G9165 Grader
1-33
position.
2. Rinse the piston rods thoroughly, and inject
all grease cups with lubricating grease.
3. Preheat and start the engine.
4. Walk around the machine to make sure that
there is no leakage.
5. Check the display screen for any warnings
regarding low oil level.
6. Check the battery electrolyte level and tire
pressure.
Preheat the grader and check the display
screen for any warnings regarding low oil
level.
Before you continue to preheat the
machine, add more hydraulic oil into the
hydraulic oil tank. And speed up the
engine to 1800rpm until the engine and
transmission box reaches working
temperature 50~90oC (122~194
oF).
Transmission oil level checking
When the machine is at working temperature and
the engine runs at idle status, the oil level of
transmission oil should be in the rated range
marked on the oil dipstick.
1
Fig. 1-40
1 Oil dipstick
Service Manual for G9165 Grader
1-34
Engine oil level checking
Oil level should be between “MAX” mark and
“MIN” mark on the oil dipstick.
Coolant level checking
1. Fill water through the coolant filling port, the
water will flow into the water tank through the
refill pipe.
2. Do not fill the water too fast, it takes about
20min to fill up the water tank for the first
time.
3. When the expansion water tank is filled up
with water, start the engine and run it idly,
check the water level through the water filling
port, and fill more water if the level is below
the baffle plate.
WARNING
It is forbidden to open the filler cap when
the system is not cooled to avoid human
injury caused by high-pressure steam.
1
Fig. 1-41
1 Engine oil dipstick
1 2
Fig. 1-42
1 Expansion water tank
2 Coolant filling port
Service Manual for G9165 Grader
1-35
Cleaning of radiator
1. Open the engine hood and remove the grille
shield device.
2. Clean the fins of radiator and condenser with
compressed air along the moving direction of
the machine.
3. Install the grid shield device.
ATTENTION
If not being dealt properly, the fins of
radiator may get damaged.
Cleaning of condenser
1. Remove the cover hood, and clean the
condenser with compressed air from outside.
2. Install the cover hood.
1
Fig. 1-43
1 Radiator
1
Fig. 1-43
1 Condenser