OPERATION

1. SUGGESTION FOR NEW MACHINE

1) It takes about 100 operation hours to enhance its

designed performance.
2) Operate according to below three steps and avoid
excessive operation for the initial 100 hours.
Avoid excessive
Service meter Load operation for ini-
Until 10 hours About 60 % tial 100 hours

Until 100 hours About 80 %

After 100 hours 100 %
侍 Excessive operation may deteriorate the
potential perfor mance of machine and
shorten lifetime of the machine.

3) Be careful during the initial 100 hours operation

(1) Check daily for the level and leakage of coolant,
engine oil, hydraulic oil and fuel.
(2) Check regularly the lubrication and fill grease 80CR94OP01
daily all lubrication points.
(3) Tighten bolts.
(4) Warm up the machine fully before operation.
(5) Check the gauges occasionally during the
operation.
(6) Check if the machine is operating normally
during operation.

4) Replace followings after initial operation hours.

Checking items Service

Engine oil
Engine oil filter element
50
Hydraulic oil tank drain filter cartridge
Fuel filter
Hydraulic oil return filter element
250
Line filter element

4-1
2. CHECK BEFORE STARTING THE ENGINE

1) Look around the machine and under the machine

to check for loosen nut or bolts, collection of dirt, or
leakage of oil, fuel or coolant and check the condi- Check before
starting
tion of the work equipment and hydraulic system.
Check also loosen wiring, and collection of dust at
places which reach high temperature.
侍 Refer to the daily check on the chapter 6, main-
tenance.
2) Adjust seat to fit the contours of the operator's
body for the pleasant operation.
80CR94OP02
3) Adjust the rear view mirror.

4-2
3. STARTING AND STOP THE ENGINE

1) CHECK INDICATOR LIGHTS

(1) Check if all the operating lever is on the neutral
position.
(2) Turn the starting switch to the ON position, and
START
check following.
Η If all the lamps light ON and buzzer sounding
for 6 seconds. OFF

Θ Only below lamps will light ON and all the other

lights will turn OFF after 2 seconds.
ÂBattery charging warning lamp (2)
ÂEngine oil pressure warning lamp (1)
Ι The preheat pilot lamp (3) will light ON when
the coolant temperature is below 10˚C .
Κ The warming up pilot lamp (4) will light ON
when the coolant temperature is below 30˚C .
ö If the ESL function is set to the YES, enter
the password to start engine.
ö If the password has failed 5 times, please
wait 30 minutes before re-attempting to enter
the password.
ö Refer to page 3-8 for the ESL function. 5594OP01

4-3
2) STARTING ENGINE
ö Sound hor n to war n surroundings after
checking if there are obstacles in the area.
ö Replace the engine oil and fuel referring to
recommended oils at page 2-11.
ö Fill anti-freeze solution to the coolant as
required.
(1) Check if all levers are on the neutral position.
(2) Turn the starting switch to ON position.
(3) Check if the preheat pilot lamp (1) is turned ON.
ö When the preheat pilot lamp is turned ON, the
preheating function is actuated within 15
seconds.
ö After the preheat pilot lamp is turned OFF,
START
engine start within 10 seconds.
ON
(4) Start engine by turning the starting switch to the OFF
START position.
5594OP02

(5) Release the starting switch immediately after

starting engine to avoid possible damage to the
starting motor.
ö If the engine is started before the preheat pilot
lamp goes OFF, it keeps the lamp ON within
15 seconds even after the engine is started.
ö Be aware that batter y can be easily
discharged after long time with head light,
work lamp and air-conditioner turned on
together under the condition of the low engine
rpm.

4-4
3) INSPECTION AFTER ENGINE START
Inspect and confirm the following after engine
starts.
(1) Is the level gauge of hydraulic oil tank in the
normal level?
(2) Are there leakages of oil or water?
(3) Are all the warning lamps OFF (2~7)?
(4) Is the indicator of engine coolant temperature
1
gauge (1) in the normal zone?
2 5
(5) Is the engine sound and the color of exhaust gas
3
normal? 4 6
(6) Are the sound and vibration normal? 7
ö Do not increase engine speed quickly after
starting, it can damage engine or turbochar-
ger.
ö If there are problems in the control panel, stop
the engine immediately and correct problem
as required. 5594OP03

4) WARMING-UP OPERATION
侍 The most suitable temperature for the hydraulic
oil is about 50˚C (122˚F ).
It can cause serious trouble in the hydraulic sys-
tem by sudden operation when the hydraulic oil 50 C
temperature is below 25˚C (77˚F ).
Then temperature must be raised to at least
25˚C (77˚F ) before starting work.
(1) Run the engine at low idling for 5 minutes.
(2) Speed up the idling and run the engine at mid-
range speed.
(3) Operate bucket lever for 5 minutes.
侍 Do not operate anything except bucket lever.
(4) Run the engine at the high speed and operate
the bucket lever and arm lever for 5-10 minutes.
侍 Operate only the bucket lever and arm lever.
(5) This warming-up operation will be completed by
operation of all cylinders several times, and
operation of swing and traveling.
侍 Increase the warming-up operation during
winter. 80CR94OP04

4-5
5) TO STOP THE ENGINE
侍 If the engine is abruptly stopped before it has
cooled down, engine life may be greatly
shortened. Consequently, do not abruptly Low idling for
stop the engine apart from an emergency. 5 minutes
侍 In particularly if the engine has overheated,
do not abruptly stop it but run it at medium
speed to allow it to cool gradually, then stop it.
(1) Down the bucket on the ground then put all
the levers in the neutral position.
(2) Run the engine at low idling speed for about 5
minutes.
(3) Return the key of starting switch to the OFF
position.
(4) Remove the key to prevent other people using
START
the machine and LOCK safety lever.
ON
(5) Lock the cab door. OFF

80CR94OP03

4-6
4. OPERATION OF WORKING DEVICE

侍 Confirm the operation of control lever and

working device.
1) Left control lever controls arm and swing.
2) Right control lever controls boom and bucket.
7 6
3) When you release the control lever, control lever 5 8
returns to neutral position automatically. 3 2 10
1 4 9
侍 When operating swing, consider the swing
distance by inertia.

11074OP43

侍 Left control lever

1 Arm roll-out 3' 3
2 Arm roll-in 4'
1 4
3 Swing right
4 Swing left
2
侍 Boom swing (boom offset switch selected)
3' Boom swing right
4' Boom swing left
侍 Refer to page 3-16 for boom offset switch. 80CR94OP05

侍 Right control lever

5 Boom lower 6
6 Boom raise
7
7 Bucket roll-out
8 Bucket roll-in 5
8 9
侍 Dozer control lever
9 Dozer blade up
10
10 Dozer blade down
80CR94OP06

4-7
5. TRAVELING OF THE MACHINE

1) BASIC OPERATION
(1) Traveling position
It is the position which the traveling motor is in
the rear and the working device is forward.
Be careful as the traveling direction will be
reversed when the whole machine is swinged
180#degree
degree1
(2) Traveling operation
It is possible to travel by either travel lever or Travel motor
pedal.
侍 Do not travel continuously for a long time.
侍 Reduce the engine speed and travel at a low
80CR94OP07
speed when traveling on uneven ground.

(3) Forward and backward traveling

When the left and right travel lever or pedal are
pushed at the same time, the machine will travel
forward or backward.
侍 The speed can be controlled by the operation
stroke of lever or pedal and change of
direction will be controlled by difference of the
left and right stroke.
21074OP10

(4) Pivot turning

Operating only one side of lever or pedal make
the change of direction possible by moving
only one track.

21074OP11

(5) Counter rotation

It is to change the direction at the original place
by moving the right and left track. Both side of
lever or pedal are operated to the other way at
the same time.

21074OP12

4-8
2) TRAVELING ON A SLOPE
(1) Make sure that the travel lever is properly
maneuvered by confirming the travel motor is in
the right location.
(2) Lower the bucket 20 to 30 cm (1 ft) to the ground
so that it can be used as a brake in an 20~
30c
emergency. m

(3) If the machine starts to slide or loses stability,

lower the bucket immediately and brake the
machine. Travel motor
(4) When parking on a slope, use the bucket as a
brake and place blocks behind the tracks to
prevent sliding.
侍 Machine cannot travel effectively on a slope
when the oil temperature is low. Do the
warming-up operation when it is going to
travel on a slope.
Travel motor
Be careful when working on slopes. It may
cause the machine to lose its balance and
turn over.
20~30cm(1ft)
Be sure to keep the travel speed switch on
the LOW (turtle mark) while traveling on a
80CR94OP08
slope.

3) TRAVELING ON SOFT GROUND

侍 If possible, avoid to operate on soft ground.
(1) Move forward as far as machine can move.
(2) Take care not to go beyond the depth where
90 ~ 110
towing is impossible on soft ground.
(3) When driving becomes impossible, lower bucket
and use boom and arm to pull the machine.
Operate boom, arm, and travel lever at the same
80CR94OP09
time to avoid the machine sinking.

4-9
4) TOWING THE MACHINE
Tow the machine as follows when it can not move
on it's own.
(1) Tow the machine by other machine after hook
the wire rope to the frame as shown in picture at
right.
(2) Hook the wire rope to the frame and put a
support under each part of wire rope to prevent
damage.
侍 Never tow the machine using only the tie
hole, because this may break.
Make sure no personnel are standing close to
the tow rope.

21074OP14A

4-10
6. EFFICIENT WORKING METHOD

1) Do the digging work by arm.

Use the pulling force of arm for digging and use
together with the digging force of the bucket if
necessary.

80CR94OP10

2) When lowering and raising the boom operate

softly for the beginning and the end.
In particularly, sudden stops while lowering the
boom may cause damage to the machine.

80CR94OP11

3) The digging resistance and wearing of tooth can

be reduced by putting the end of bucket tooth to
the digging direction.

13034OP39

4) Set the tracks parallel to the line of the ditch to be

excavated when digging ditch. Do not swing while
digging.

Parallel

80CR94OP12

4-11
5) Dig slowly with keeping the angle of boom and
arm, 90-110 degree when maximum digging force
is required.

90~110

80CR94OP13

6) Operate leaving a small safety margin of cylinder Magin

stroke to prevent damage of cylinder when
working with the machine.

80CR94OP14

7) Keep the bucket to the dumping position and the

arm horizontal when dumping the soil from the
bucket.
Operate bucket lever 2 or 3 times when hard to
dump.
侍 Do not use the impact of bucket tooth when
dumping.

80CR94OP15

8) Operate stop of swing considering the swing slip

distance is created by inertia after neutralizing the
swing lever.
Inertia

Swing stop
80CR94OP16

4-12
9) Do not use the dropping force of the work
equipment for digging.
The machine can be damaged by the impact.

80CR94OP17

10) Do not use the bucket to crack hard objects like

concrete or rocks.
This may break a tooth or pin, or bend boom.

80CR94OP18

11) Do not use the bucket to crack hard objects like Incorrect
concrete or rocks.
This may break a tooth or pin, or bend boom.

80CR94OP19

12) NEVER CARRY OUT EXCESSIVE OPERATIONS Incorrect

Operation exceeding machine performance may
result in accident or failure.
Carry out lifting operation within specified load
limit.
Never carry out operations which may damage
the machine such as overload or over-impact-
load.
Never travel while carrying a load.
In case you need installing over load warning
device for object handling procedure, please
contact Hyundai distributor. 80CR94OP28

4-13
13) BUCKET WITH HOOK
When carrying out lifting work, the special lifting
hook is necessary.
The following operations are prohibited.
余#Lifting loads with a wire rope fitted around the
bucket teeth. Hook
余#Lifting loads with the wire rope wrapped directly
around the boom or arm.
When performing lifting operation, securely hook
the wire rope onto the special lifting hook.
When performing lifting operation, never raise or
lower a person.
Due to the possible danger of the load falling or of
collision with the load, no persons shall be
allowed in the working area.
Before performing lifting operation, designate an
operation supervisor.
Always execute operation according to his
instructions.
余#Execute operating methods and procedures
under his direction.
余#S elect a person responsible for signaling.
Operate only on signals given by such person. R5574OP30

Never leave the operator's seat while lifting a load.

4-14
7. OPERATION IN THE SPECIAL WORK SITES

1) OPERATION THE MACHINE IN A COLD WEATHER

(1) Use proper engine oil and fuel for the weather.
(2) Fill the required amount of antifreeze in the
coolant.
(3) Refer to the starting engine in cold weather.
Start the engine and extend the warming up
operation.
(4) Be sure to open the heater cock when using the
heater.
(5) Always keep the battery completely charged.
ö Discharged batteries will freeze more easily
than fully charged.
(6) Clean the machine and park on the wood plates. 80CR94OP01

2) OPERATION IN SANDY OR DUSTY WORK SITES

(1) Inspect air cleaner element frequently. Clean or

replace element more frequently, if warning
lamp comes ON and buzzer sounds
simultaneously, regardless of inspection period.
ö Replace the inner and outer element after 4
times of cleaning.
(2) Inspect radiator, oil cooler and condenser
frequently, and keep cooling fins clean.
(3) Prevent sand or dust from getting into fuel tank
and hydraulic tank during refilling.
(4) Prevent sand or dust from penetrating into
hydraulic circuit by tightly closing breather cap of
hydraulic oil tank. Replace hydraulic oil filter and
air breather element frequently. Also, replace the
fuel filter frequently.
(5) Keep all lubricated part, such as pins and
bushings, clean at all times.
(6) If the air conditioner and heater filters clogged,
the heating or cooling capacity will drop. Clean
or replace the filter element more frequently.
(7) Clean electrical components, especially the
star ting motor and alter nator to avoid
accumulation of dust.

4-15
3) SEA SHORE OPERATION
(1) Prevent ingress of salt by securely tightening
plugs, cocks and bolts of each part.
(2) Wash machine after operation to remove salt
residue.
Pay special attention to electrical parts, and
hydraulic cylinders and track tension cylinder to
prevent corrosion.
(3) Inspection and lubrication must be carried out
more frequently.
Supply sufficient grease to replace all old grease
in bearings which have been submerged in
water for a long time.

4) OPERATION IN MUD, WATER OR RAIN

WORK SITES
(1) Perform a walk around inspection to check for
any loose fittings, obvious damage to the
machine or any fluid leakage.
(2) After completing operations, clean mud, rocks or
debris from the machine. Inspect for damage,
cracked welds or loosened parts.
(3) Perform all daily lubrication and service.
(4) If the operations were in salt water or other
corrosive materials, make sure to flush the
affected equipment with fresh water.

5) OPERATION IN ROCKY WORK SITES

(1) Check for damage to the undercarriage and for
looseness, flaws, wear and damage in bolts and
nut.
(2) Loosen the track tension a little when working in
such areas.
(3) Do not turn the undercarriage directly over the
sharp edge rock.

4-16
8. NORMAL OPERATION OF EXCAVATOR

Followings may occur during operation due to the

nature of a hydraulic excavator.

1) When rolling in the arm, the roll-in movement stop

momentary at point X in the picture shown, then
recovers speed again after passing point X.
The reason for this phenomenon is that movement
by the arm weight is faster than the speed of oil
flow into the cylinder.
2) When lowering the boom, one may hear continu- X
ous sound.
This is caused by oil flow in the valve.
3) Overloaded movement will produce sound
caused by the relief valves, which are for the pro-
tection of the hydraulic systems.
4) When the machine is started swing or stopped, a
noise near the swing motor may be heard. The
noise is generated when the brake valve relieves. 80CR94OP20

4-17
9. ATTACHMENT LOWERING (when engine is stopped)

1) On machines equipped with an accumulator, for a

short time (within 2 minutes) after the engine is
stopped, the attachment will lower under its own
weight when the attachment control lever is shifted
to LOWER. That is happen only starting switch
ON position and safety lever UNLOCK position.
After the engine is stopped, set the safety lever to
the LOCK position.
Be sure no one is under or near the attachment
before lowering the boom.
2) The accumulator is filled with high-pressure
nitrogen gas, and it is extremely dangerous if it is
handled in the wrong way. Always observe the
Accumulator
following precautions.
Never make any hole in the accumulator expose
it to flame or fire.
Do not weld anything to the accumulator.
侍 When carrying out disassembly or maintenance of
the accumulator, or when disposing of the
accumulator, it is necessary to release the gas
from the accumulator. A special air bleed valve is
necessary for this operation, so please contact
your Hyundai distributor.
80CR94OP26

4-18
10. STORAGE

Maintain the machine taking care of following to

prevent the deterioration of machine when storing
the machine for a long time, over 1 month.
1) BEFORE STORAGE
4 5 4 3 2 1
(1) Cleaning the machine
Clean the machine. Check and adjust tracks.
Grease each lubrication part.
(2) Lubrication position of each part
Change all oil.
ö Be particularly careful when you reuse the 6 7 8
machine. 1 Boom and frame connection pin (2EA)
As oil can be diluted during storage. 2 Boom cylinder pin (1EA)
3 Arm cylinder manifold (1EA)
Apply an anticorrosive lubricant on the
4 Arm cylinder pin (2EA)
exposed part of piston rod of cylinder and in 5 Boom and arm connection pin (1EA)
places where the machine rusts easily. 6 Arm and bucket (5EA)
7 Dozer blade and cylinder (4EA)
8 Boom swing post (2EA)
80CR94OP21

(3) Master switch

Turn OFF the master switch mounted on the Rear trim assy
rear trim assy.
(4) Be sure to mix anticorrosive antifreezing solution Master switch
in the radiator.

OFF

80CR94OP27

(5) Prevention of dust and moisture

Keep machine dry. Store the machine setting
wood on the ground.
ö Cover exposed part of piston rod of cylinder.
ö Lower the bucket to the ground and set a sup-
port under track.

80CR94OP22

4-19
2) DURING STORAGE
Start engine and move the machine and work
equipment once a month and apply lubrication to
each part. Lubricating
operation
ö Check the level of engine oil and coolant and once a month
fill if required when starting engine.
ö Clean the anticorrosive on the piston rod of cyl-
inder.
ö Operate the machine such as traveling, swing
and work equipment operation to make sure
enough lubrication of all functional compo-
nents.

80CR94OP01

ö BATTERY
刮 Once a month, start the engine for 15 minutes (or use a charger) to charge the battery.
刯 Every 2 months, check the battery voltage and keep battery voltage over 12.54V.
到 If the machine stock period is over 6 months, disconnect the battery negative (-) terminal.

3) AFTER STORAGE
Carry out the following procedure when taking out of a long time storage.
(1) Wipe off the anticorrosive lubricant on the hydraulic piston rod.
(2) Completely fill fuel tank, lubricate and add oil.
(3) When storage period is 6 months over
If the machine stock period is over 6 months, carry out the following procedure.
This procedure is to drain condensation water for the swing reduction gear durability.
ö Remove the drain port plug and drain the water until the gear oil comes out and then tighten the
drain plug.
ö Refer to the service instruction, section 6 for the drain plug location.
ö If the machine is stored without carrying out the monthly lubricating operation, consult your
Hyundai dealer for service.

4-20
11. RCV LEVER OPERATING PATTERN (STD)

RH 侍##Whenever a change is made

1 2
4 3 to the machine control pat-
LH
4 tern also exchange the pat-
3 2 1
tern label in the cab to match
the new pattern.

E
D
F
H
B G
J
A

TERMINAL ASSY 80CR94OP23

Operation Hose connection (port)

Pattern Control function RCV Change of Terminal block
Left Right
lever From To
1 5 1
Arm out 刯 D -
# ISO Type
2
Arm in 刱 E -
Left
3
Swing right 到 B -
4 3 7
8 4
Swing left 刮 A -
5
Boom lower 刱 G -
6
Boom raise 刯 F -
Right
6 7
Bucket out 刮 H -
Hyundai 2
8
Bucket in 到 J -
A Type 1 1
Boom lower 刯 D J
5
2
Boom raise 刱 E H
Left
3
Swing right 到 B -
4 3 8 7
4
Swing left 刮 A -
5
Arm out 刱 G D
6
Arm in 刯 F E
Right
7
Bucket out 刮 H -
2 6
8
Bucket in 到 J -
B Type 1
Boom lower 刯 D J
1 5
2
Boom raise 刱 E H
Left
3
Bucket in 到 B F
4 3 8 7 4
Bucket out 刮 A G
5
Arm out 刱 D D
6
Arm in 刯 F E
Right
2 7
Swing right 刮 H B
6
8
Swing left 到 J A
C Type 1 1 Swing right 刯 D J
5
2 Swing left 刱 E H
Left
4 3 Arm in 到 B F
3 8 7 4 Arm out 刮 A G

Right Same as ISO type

6
2

4-21
RCV LEVER OPERATING PATTERN (option, A type)

RH
1 2
4 3
LH
4
3 2 1

B H
J
A J3
J1

J4
TERMINAL ASSY
J2
80CR94OP24

Operation Hose connection (port)

Pattern Control function
Left Right RCV lever MCV port
1 1
Boom lower 刯 J1
1
2
Boom raise 刱 J3
Left
3 3
Bucket out 到 B
4 3 4 4
Bucket in 刮 A
A ype
5
Arm out 刱 J2
6
Arm in 刯 J4
Right
7
Swing right 刮 H
2 2
8
Swing left 到 J

1) The machine control pattern can easily be

MULTIMODE
changed from the "ISO" type to the "A" type by SELECTOR VALVE
changing the position of the lever.
A TYPE(OPT)
Before starting the machine, check the lever ISO TYPE(STD)
position of multimode selector valve and actual
operating of attachment.

80CR94OP25

2) Change of operating pattern (ISO 供 A type)

(1) Loosen bolt (11). ISO TYPE(STD) A TYPE(OPT)
(2) Move lever from the "ISO" type to "A" type
position.
(3) After setting the lever, tighten bolt to secure
lever.
Lever
11 11
Lever

1607A4OP91

4-22
12. HANDLING THE RUBBER TRACKS

1) USING THE RUBBER TRACKS PROPERLY

Rubber tracks have some advantages over steel tracks.
However, you cannot take full advantage of them if you use them in the same manner as steel
ones. Use care in operating with rubber tracks in accord with the conditions of the work site and the
type of work.
Comparison table of rubber and steel tracks
Rubber Steel
Low vibration Excellent Ordinary
Smooth travel Excellent Good
Silent travel Excellent Ordinary
Less damage to paved roads Excellent Ordinary
Simple handling Excellent Ordinary
Susceptibility to damage (strength) Ordinary Excellent
Drawber full Excellent Excellent

Rubber tracks have many advantages inherent in the unique properties of the material. On the
other hand, however, they are low in strength. It is essential that you fully understand the properties
of rubber tracks, and observe the precautions for operating and handling them to prolong their life
and get the most out of them. Be sure to read this section for using the rubber tracks before using
them.

2) WARRANTY FOR RUBBER TRACKS

The rubber tracks are not warranted for free repair or replacement if they are damaged because of
misuse by the customer, including the failure to comply with the prohibitions and the instructions for
safe operation; (for example, the failure to check the tension of the rubber tracks or service the
rubber tracks properly, or "using the rubber tracks on surfaces and terrains which could physically
damage them".)

3) PROHIBITIONS FOR USING THE RUBBER TRACKS

(1) Do not operate or turn on surfaces of terrains that have sharp stones, a hard, uneven rock base,
or that expose the tracks to steel rods, scrap iron, or edges of iron plates. Failure to observe these
prohibitions may damage the rubber tracks.
(2) Do not operate the machine on a stony surface like a riverbed. Doing this may damage the
rubber tracks by catching gravel in the tracks or may cause the tracks to come off. Forcibly
pushing obstacles will also shorten the life of the rubber tracks.
(3) Prevent the rubber tracks from getting exposed to oil, fuel or chemical solvents. If they are
exposed, immediately wipe them. Also, do not travel on roads which have oily surfaces.
(4) When storing the rubber tracks for a long time period (more than three months), avoid placing
them in a place subject to direct exposure to sunlight or rain.

4-2
(5) Do not operate the machine when the tracks will be exposed to heat, (i.e., near an open-air fire,
on a steel plate that has been exposed to the blazing sun, or on a hot asphalt road.)
(6) Never run on one rubber track while the other is held above the ground with the implement. Doing
this may damage the rubber track or cause it to come off.

4) PRECAUTIONS FOR USING THE RUBBER TRACKS

Observe the following precautions when operating the machine :
(1) Never spin-turn on concrete or asphalt roads.
(2) Do not change course suddenly. Doing this will cause the rubber track to wear early or be
damaged.
(3) Do not turn the machine across a large level gap while traveling . Remember that running over a
level gap at a right angle will prevent the track from coming off.
(4) Slowly lower the machine after it has been lifted above the ground with the implement.
(5) It is not recommended that the machine be used to handle any materials that become oily after
being crushed (e.g., soybeans, corn, rapeseed oil seeds, etc.). After unavoidably using the
machine to handle such materials, clean the tracks with water.
(6) It is not recommended that the machine be used to handle materials such as salt, ammonium
sulfate, potassium chloride, potassium sulfate, or superbiphosphate of lime. Handling these
materials may affect the core metal adversely. After using the machine to handle such materials,
clean the tracks with water.
(7) Do not operate the machine at the seashore. Doing this may affect the core metal adversely due
to the salt content.
(8) If a rubber track is cracked, it could be easily damaged when exposed to salt, sugar, wheat, or
soybeans. Be sure to repair any cracks in the rubber track to prevent rubber chips from getting
into the materials being handled.
(9) Do not allow the rubber track to rub aginst a concrete wall.
(10) The rubber tracks are prone to slip on snow or on a frozen road. Be careful of skidding when
traveling or operating on a slope in cold weather.
(11) Operating the machine in extremely cold weather will deteriorate the rubber tracks, shortening
their life.
(12) Use the rubber tracks between -25¶C to +55¶C (-13¶F to +131¶F) because of the physical
characteristics of rubber.
(13) Be careful not to damage the rubber tracks with the bucket while operating the machine.

4-24
5) BE CAREFUL NOT TO COME OFF THE RUBBER TRACKS
Keep the tracks in appropriate tension to prevent them from coming off.
If the tension is too low, the rubber tracks may come off under the following conditions.
Even if the tension is adequate, take care when operating the tracks under these conditions.
Some illustrations in this section can be different from your machine.

(1) Do not steer the machine at an angle other than

90 degrees across a large level gap created by a
curbstone or a rock [approximately more than
20 cm (8")]. Run over a level gap at a right angle
only to prevent the tracks from coming off.

1694OP31

(2) Do not steer the machine across a boundary

between the flat ground and a slope, while mov-
ing backwards. If such travel is not avoidable,
slow down the speed.

1694OP32

(3) Do not travel with the track on one side on a slope

or on convex ground (causing a machine angle of
more than 10 degrees), and with the track on the
other side on flat ground, to prevent the rubber
track from being damaged. Be sure to travel with
the tracks on both sides on the same level sur-
face.

1694OP33

4-25
(4) The three cases illustrated above are those which
could cause the rubber tracks to loosen. In addi-
tion, do not subject machine to such ground con-
ditions as are illustrated in the figure at the right.

1694OP34

HOW THE RUBBER TRACKS COME OFF

(5) When running over a level gap, a clearance is
created between the tracks and the track rollers. Rubber track
At this point, the tracks tend to come off.

Track roller
1694OP35

(6) If the machine is traveling in reverse, clearance

may also be created between the track rollers
and the rubber tracks, and between the idlers and
the rubber tracks, causing the rubber tracks to Idler
come off.

1694OP36

1694OP37

(7) Other situations to be avoided.

Η When the machine changes the travel direction
while the rubber tracks are blocked sideways by Rubber track side Frame side

an obstacle or the like.

P
Θ When the idler and the track rollers are mis-
aligned from the core metal, due to rubber track
misalignment. F

Detail of P

4-26
Ι Traveling in reverse under the condition illustrat-
ed will cause the rubber tracks to come off.

1694OP38

Κ Changing the travel direction of the machine

under the condition illustrated will cause the
rubber tracks to come off.

1694OP39

4-27