PDF Service Manual Hyundai R320LC-7A Crawler Excavator - 1 MB
This is the complete service manual for the Hyundai R320LC-7A Crawler Excavator.
It contains all the technical data, troubleshooting procedures, and repair instructions you need.
From the engine to the hydraulic system, this manual provides comprehensive guidance for professional technicians.
PDF Viewer
Viewer loads when you scroll here
SHARE THIS MANUAL
Download the PDF Manual
PDF viewer loading area
Text Preview from This Manual
The text below was extracted from the visible preview pages to help you confirm the manual contents before download.
--- Page 1 ---
CONTENTS
Foreword - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0-1 6. Traveling of the machine - - - - - - - - - - - - - - - - - - - - - - - - - - 4-14
Before servicing this machine - - - - - - - - - - - - - - - - - - - - - - - - 0-2 7. Efficient working method - - - - - - - - - - - - - - - - - - - - - - - - - 4-17
EC regulation approved - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0-3 8. Operation in the special work sites - - - - - - - - - 4-21
Table to enter S/No and distribution - - - - - - - - - - - - - - - 0-4 9. Normal operation of excavator - - - - - - - - - - - - - - - - 4-23
Safety labels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0-5 10. Attachment lowering - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-24
Machine data plate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0-15 11. Storage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-25
Guide(Direction, S/No, Symbol) - - - - - - - - - - - - - - - - - - - - - 0-16 12. RCV lever operating pattern - - - - - - - - - - - - - - - - - - - - 4-27
13. Switching hydraulic attachment circuit - - - - - 4-28
SAFETY HINTS
1. Before operating the machine - - - - - - - - - - - - - - - - - 1-1 TRANSPOTATION
2. During operating the machine - - - - - - - - - - - - - - - - - 1-6 1. Preparation for transportation - - - - - - - - - - - - - - - - - - 5-1
3. During maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-13 2. Dimension and weight - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
4. Parking - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-16 3. Loading the machine - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-4
4. Fixing the machine - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-6
SPECIFICATIONS 5. Loading and unloading by crane - - - - - - - - - - - - - 5-7
1. Major components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1
2. Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2 MAINTENANCE
3. Working range - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-3 1. Instruction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
4. Weight - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4 2. Tightening torque - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-6
5. Lifting capacities - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5 3. Fuel, coolant and lubricants - - - - - - - - - - - - - - - - - - - - - 6-9
6. Bucket selection guide - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-8 4. Maintenance check list - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-11
7. Undercarriage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-10 5. Maintenance chart - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-16
8. Specification for major components - - - - - - - - 2-12 6. Service instruction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-18
9. Recommended oils - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-16 7. Electrical system - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-42
8. Air conditioner and heater - - - - - - - - - - - - - - - - - - - - - - - 6-45
CONTROL DEVICES
1. Cab devices - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1 TROUBLESHOOTING GUIDE
2. Cluster - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2 1. Engine - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
3. Switches - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-9 2. Electrical system - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
4. Levers and pedals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-14 3. Others - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-3
5. Air conditioner and heater - - - - - - - - - - - - - - - - - - - - - - - 3-16
6. Others - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-23 HYDRAULIC BREAKER
1. Selecting hydraulic breaker - - - - - - - - - - - - - - - - - - - - - 8-1
OPERATION 2. Circuit configuration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2
1. Suggestion for new machine - - - - - - - - - - - - - - - - - - - 4-1 3. Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-3
2. Check before starting the engine - - - - - - - - - - - - 4-2 4. Precautions while operating the breaker - 8-4
3. Starting and stop the engine - - - - - - - - - - - - - - - - - - - 4-3 5. Quick clamp - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-6
4. Mode selection system - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6
5. Operation of the working device - - - - - - - - - - - - - - 4-13 INDEX - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9-1
--- Page 3 ---
13) SHEARING-ENGINE HOOD(Item 17)
This warning label is positioned on the
engine hood.
Do not open the engine hood during the
engine's running.
Do not touch exhaust pipe or it may
cause severe burn.
21070FW15
14) NO STEP-ENGINE HOOD(Item 18)
This warning label is positioned on the
engine hood.
Do not step on the engine hood.
21070FW16
15) TRANSPORTING(Item 19)
This warning label is positioned right side of
upper frame.
Study the operator's manual before
transporting the machine, if provided and
tie down arm and track to the carrier with
lashing wire.
※ See page 5-6 for details.
14070FW17
16) CONTROL IDEOGRAM(Item 21)
This warning label is positioned in right
window of the cab.
Check the machine control pattern for
conformance to pattern on this label. If
not, change label to match pattern before
operating machine.
Failure to do so could result in injury or
36070FW19
death.
※ See page 4-13 for details.
0-10
--- Page 4 ---
ROTATING BEACON
Beacon
When you operate a machine on a road or
beside a road, a rotating beacon is required to
avoid any traffic accident.
Please contact your Hyundai distributor to install
it.
21071SH03
PRECAUTIONS FOR ATTACHMENTS
When installing and using an optional
attachment, read the instruction manual for the
attachment and the information related to
attachments in this manual.
Do not use attachments that are not authorized
by Hyundai or your Hyundai distributor. Use of
unauthorized attachments could create a safety
problem and adversely affect the proper
operation and useful life of the machine.
Any injuries, accidents, product failures resulting
from the use of unauthorized attachments are
not the responsibility of Hyundai.
SAFETY RULES
Only trained and authorized personnel can
operate and maintain the machine.
Follow all safety rules, precautions and
instructions when operating or performing
maintenance on the machine.
When working with another operator or a person
on worksite traffic duty, be sure all personnel
understand all hand signals that are to be used.
1-4
--- Page 5 ---
There is the danger of fire in fuel and oil.
Store in cool and dry area, away from any open
flames.
13031SH37
Do not touch exhaust pipe, or may cause severe
burn.
13031SH38
Do not open the engine hood and covers while
the engine is running.
13031SH39
Be careful of not hitting the edges when you
service engine.
13031SH40
1-14
--- Page 6 ---
2) R320LC-7A HIGH WALKER
R320LC-7A HIGH WALKER
Item
kg lb
Upperstructure assembly 14520 31590
Main frame weld assembly 2680 5900
Engine assembly 590 1300
Main pump assembly 180 380
Main control valve assembly 200 440
Swing motor assembly 310 680
Hydraulic oil tank assembly 230 490
Fuel tank assembly 210 450
Counterweight 6200 13670
Cab assembly 310 680
Radiator total assy 280 620
Lower chassis assembly 13360 29450
Track frame weld assembly 5825 12840
Swing bearing 410 900
Travel motor assembly 390 860
Turning joint 50 110
Tension cylinder 210 450
Idler 250 540
Sprocket 80 170
Carrier roller 40 80
Track roller 60 120
Track-chain assembly(600mm standard triple grouser shoe) 1860 4100
Front attachment assembly(6.45m boom, 3.2m arm,
6390 14090
1.44m3 SAE heaped bucket)
6.45m boom assembly 2530 5580
3.2m arm assembly 1160 2560
1.44m3 SAE heaped bucket 1120 2470
Boom cylinder assembly 280 620
Arm cylinder assembly 380 840
Bucket cylinder assembly 270 570
Bucket control linkage assembly 370 820
2-8
--- Page 7 ---
(2) 6.45m(21' 2") boom, 2.2m(7' 3") arm equipped with 1.44m3(SAE heaped) bucket and 600mm (24")
triple grouser shoe and 6200kg(13670lb) counterweight.
Load radius At max. reach
Load point 3.0m(10.0ft) 4.5m(15.0ft) 6.0m(20.0ft) 7.5m(25.0ft) Capacity Reach
height
m(ft)
7.5m kg *6560 5750 8.27
(25.0ft) lb *14460 12680 (27.1)
6.0m kg *7790 *7790 *7160 6690 *6620 4760 9.07
(20.0ft) lb *17170 *17170 *15790 14750 *14590 10490 (29.8)
4.5m kg *12070 *12070 *9100 *9100 *7740 6480 6310 4250 9.53
(15.0ft) lb *26610 *26610 *20060 *20060 *17060 14290 13910 9370 (31.3)
3.0m kg *10580 8810 *8490 6220 6030 4030 9.71
(10.0ft) lb *23320 19420 *18720 13710 13290 8880 (31.9)
1.5m kg *11750 8400 8960 5990 6060 4040 9.62
(5.0ft) lb *25900 18520 19750 13210 13360 8910 (31.6)
Ground kg *17060 12870 *12310 8190 8810 5850 6440 4290 9.25
Line lb *37610 28370 *27140 18060 19420 12900 14200 9460 (30.3)
-1.5m kg *15230 *15230 *16370 12940 *12160 8160 8790 5830 7320 4910 8.56
(-5.0ft) lb *33580 *33580 *36090 28530 *26810 17990 19380 12850 16140 10820 (28.1)
-3.0m kg *19910 *19910 *14770 13190 *11100 8300 *7210 6270 7.45
(-10.0ft) lb *43890 *43890 *32560 29080 *24470 18300 *15900 13820 (24.4)
-4.5m kg *11560 *11560
(-15.0ft) lb *25490 *25490
(3) 6.45m(21' 2") boom, 2.5m(8' 2") arm equipped with 1.44m3(SAE heaped) bucket and 600mm (24")
triple grouser shoe and 6200kg(13670lb) counterweight.
Load radius At max. reach
Load point 3.0m(10.0ft) 4.5m(15.0ft) 6.0m(20.0ft) 7.5m(25.0ft) 9.0m(30.0ft) Capacity Reach
height
7.5m kg *6190 5470 8.53
(25.0ft) lb *13650 12060 (28.0)
6.0m kg *6830 6730 *6290 4560 9.31
(20.0ft) lb *15060 14840 *13870 10050 (30.5)
4.5m kg *11350 *11350 *8700 *8700 *7440 6490 6070 4080 9.76
(15.0ft) lb *25020 *25020 *19180 *19180 *16400 14310 13380 8990 (32.0)
3.0m kg *14550 13750 *10220 8840 *8230 6210 6800 4550 5790 3860 9.93
(10.0ft) lb *32080 30310 *22530 19490 *18140 13690 14990 10030 12760 8510 (32.6)
1.5m kg *16520 12990 *11480 8380 8930 5960 5810 3850 9.84
(5.0ft) lb *36420 28640 *25310 18470 19690 13140 12810 8490 (32.3)
Ground kg *17000 12760 *12160 8130 8750 5790 6140 4080 9.48
Line lb *37480 28130 *26810 17920 19290 12760 13540 8990 (31.1)
-1.5m kg *15490 *15490 *16510 12790 *12150 8060 8710 5750 6930 4620 8.82
(-5.0ft) lb *34150 *34150 *36400 28200 *26790 17770 19200 12680 15280 10190 (28.9)
-3.0m kg *20890 *20890 *15120 13010 *11300 8180 *7250 5800 7.75
(-10.0ft) lb *46050 *46050 *33330 28680 *24910 18030 *15980 12790 (25.4)
-4.5m kg *16640 *16640 *12290 *12290
(-15.0ft) lb *36680 *36680 *27090 *27090
2-18
--- Page 8 ---
7) REMOTE CONTROL VALVE
Item Specification
Type Pressure reducing type
Minimum 6.5kgf/cm2(92psi)
Operating pressure
Maximum 26kgf/cm2(370psi)
Lever 61mm(2.4in)
Single operation stroke
Pedal 123mm(4.84in)
8) CYLINDER
Item Specification
Bore dia×Rod dia×Stroke Ø150×Ø105×1480mm
Boom cylinder
Cushion Extend only
Bore dia×Rod dia×Stroke Ø160×Ø110×1685mm
Arm cylinder
Cushion Extend and retract
Bore dia×Rod dia×Stroke Ø140×Ø100×1285mm
Bucket cylinder
Cushion Extend only
※ Discoloration of cylinder rod can occur when the friction reduction additive of lubrication oil spreads on
the rod surface.
※ Discoloration does not cause any harmful effect on the cylinder performance.
9) SHOE
Item Width Ground pressure Link quantity Overall width
Standard ☆600mm(24") 0.62kgf/cm2(8.82psi) 48 3280mm(10' 9")
☆700mm(28") 0.54kgf/cm2(7.68psi) 48 3380mm(11' 1")
R320LC-7A
Option ☆800mm(32") 0.48kgf/cm (6.83psi)
2
48 3480mm(11' 5")
☆900mm(36") 0.43kgf/cm2(6.11psi) 48 3580mm(11' 9")
R320NLC-7A Standard ☆600mm(24") 0.61kgf/cm (8.67psi)
2
48 2990mm( 9' 10")
Standard ☆600mm(24") 0.67kgf/cm2(9.53psi) 48 3470mm(11' 5")
R320LC-7A ☆700mm(28") 0.58kgf/cm (8.25psi)
2
48 3570mm(11' 9")
H/WALKER Option ☆800mm(32") 0.51kgf/cm2(7.25psi) 48 3670mm(12' 0")
★710mm(28") 0.58kgf/cm (8.25psi)
2
48 3580mm(11' 9")
☆ : Triple grouser
★ : Double grouser
2-28
--- Page 9 ---
(3) Auto deceleration switch
Η This switch is used to actuate or cancel the auto deceleration
function.
When the switch actuated and all control levers and pedals are
at neutral position, engine speed will be lowered automatically
to save fuel consumption.
21073CD22 ÂLight ON : Auto deceleration function is selected.
ÂLight OFF : Auto deceleration function is cancelled so that the
engine speed increased to previous setting value.
Θ Operating the auto deceleration function makes the decel
indicating lamp on the LCD panel ON.
(4) Power mode switch
Η The lamp of selected mode is turned ON by pressing the
switch( ).
ÂH : High power work.
ÂS : Standard power work.
21073CD23
(5) Travel speed control switch
Η This switch is to control the travel speed which is changed to
high speed(Rabbit mark) by pressing the switch and low
speed(Turtle mark) by pressing it again.
21073CD24
(6) Buzzer stop switch
Η When the starting switch is turned ON first, normally the alarm
buzzer sounds for 2 seconds during lamp check operation.
Θ The red lamp lights ON and the buzzer sounds when the
machine has a problem.
In this case, press this switch and buzzer stops, but the red
21073CD25 lamp lights until the problem is cleared.
(7) Select switch
Η This switch is used to select the monitor display function.
ö Refer to the page 4-11 for details.
Θ If the switch is pressed for 3 seconds in time display mode, it
moves to time adjusting function, and you can adjust the time
as below.
21073CD25A ÂHour by auto decel( )switch
ÂMinute by buzzer stop( ) switch.
Ι After time set, the switch is pressed, it returns to clock display.
3-8
--- Page 10 ---
6) SWITCH PANEL
Work mode switch Power mode switch
Travel speed switch
User mode switch
Buzzer stop switch
Auto deceleration switch Select switch
1607A3CD19
ö When the switches (Work mode, Power mode, Auto decel, Travel speed control) are select-
ed, the pop-up icon is displayed on the LCD.
Refer to the page 3-4 for details.
(1) Work mode switch
Η This switch is to select the machine operation mode, which
shifts from general operation mode to heavy operation mode
and breaker mode in a raw by pressing the switch.
 : Heavy duty work mode
 : General work mode
21073CD20 Â : Breaker operation mode
ö Refer to the page 4-6, 4-12-1 for details.
(2) User mode switch
Η This switch is to select the maximum power or user mode.
ÂM : Maximum power
ÂU : Memorizing operators preferable power setting.
ö Refer to the page 4-6, 4-12-1 for details.
1607A3CD21
3-8-10
--- Page 11 ---
1) POWER SWITCH
(1) This switch makes the system and the LED simultaneously ON or OFF.
(2) Default setting values
Function Air conditioner Fan speed Temperature Outlet Inlet
Value OFF 1 Max cool Face Recirculation
21073CD53
2) AIR CONDITIONER SWITCH(Compressor switch)
(1) Operating this switch turns the compressor and the LED
simultaneously ON or OFF.
(2) In accordance with the evaporator temperature, compressor turns on
or off automatically without changing LED state.
ö Air conditioner operates to remove vapor and drains water
through a drain hose. Water can be sprayed into the cab in case
21073CD53
that the vacuum valve of drain hose has a problem.
In this case, exchange the vacuum valve.
3) FAN SPEED SWITCH
(1) It is possible to control the fan to four steps.
(2) The first step or the fourth step gives 5 times beeps.
21073CD52
4) TEMPERATURE CONTROL SWITCH
(1) There are 9 steps to control temperature from max cool to max warm
controlled up and down by 1 step.
(2) Max cool and max warm arouse 5 times beeps.
Cool
(3) For the max warm or the max cool it's better to be configured as
Warm following table.
21073CD50
Temperature Air conditioner Fan speed Outlet Inlet
Max cool ON 4 Face Recirculation
Max warm OFF 3 Foot Fresh
3-16
--- Page 13 ---
11) J1939 SERIAL CONNECTOR
(1) ECM communicates the engine data with cummins INLINE-II adapter
through J1939 connector.
Η ECM fault code check
Θ ECM program change
Ι Engine data monitoring & test
29073CD59
12) UPPER WINDSHIELD
(1) Perform the following procedure in order to open the upper
windshield.
Η Release both latches(1) in order to release the upper windshield.
Θ Hold both grips that are located at the bottom of the windshield
frame and at the top of the windshield frame push the windshield
upward.
Ι Hold both grips that are provided on the windshield frame and back
into the storage position until auto lock latch(2) is engaged, move the
14073CD70
levers of both latches(1) into the locked position. Push the levers
toward the rear of the cab in order to hold the windshield in storage
position.
Latch 2 (2) Perform the following procedure in order to close the upper windshield.
Η Move the lever of the auto lock latch(2) in the direction of the arrow in
order to release the auto lock latch.
Θ Reverse step Η through step Ι in order to close the upper
windshield.
29073CD71
3-22
--- Page 14 ---
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
initial 100 hours
Until 10 hours About 60%
Until 100 hours About 80%
After 100 hours 100%
ö Excessive operation may deteriorate the
potential performance 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 29074OP01
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 50 hours of
operation
Checking items Service
Engine oil
Engine oil filter element
Hydraulic oil return filter element
Replace
Hydraulic oil tank drain filter cartridge
Line filter element
Fuel filter
4-1
--- Page 15 ---
(6) Monitoring system
Information of machine performance as moni-
tored by the MCU controller can be displayed on
the monitoring display.
ö Refer to 4-11 page for details.
(7) Self diagnostic system
Η MCU controller
The MCU controller diagnoses problems in the
CAPO system caused by electric parts' mal-
function and by open or short circuit, which are
displayed on the monitoring display as error
codes(2digit).
ö Consult hyundai or hyundai dealer for details.
Θ Engine controller(ECM) Electric box
If the engine or relevant system has problem
MCU
ECM diagnoses and displays on the monitoring Controller
display as fault codes(3 digit).
ö Consult hyundai or hyundai dealer for details.
(8) Anti-restart system
The system protects the starter from inadvertent
restarting after the engine is already operational.
2907A4OP08A
2) HOW TO OPERATE MODE SELECTION
SYSTEM
(1) When start key is turned ON
Η When start key is turned ON, all illumination
lamps are ON and all lamps are OFF automati-
cally after 5 seconds. But a battery charging
warning lamp and an engine oil pressure warn-
ing lamp keep turned ON until engine starting.
Θ After lamp checkÖC CL : 2.0×, the version of
cluster program, is displayed on Monitoring
display for 2 seconds.
Ι After the version of program is displayed, the
cluster returns to default. Exactly engine rpm,
battery charging warning lamp and engine oil
pressure warning lamp are turned ON and S
mode, auto decel, low travel speed(Turtle mark)
are displayed.
Κ In default condition self-diagnostic function
including trouble detecting of electric system
can be carried out.
ö Refer to 4-11 page for details.
50074OP03
4-8
--- Page 16 ---
5. OPERATION OF WORKING DEVICE
ö 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 5 8
lever returns to neutral position automatically. 32
1 4
ö When operating swing, consider the swing
distance by inertia.
2107A4OP06A