Doosan DX235LCR 2018 Manual

Operation &
Maintenance
Manual
DX235LCR
Serial Number 5001 and Up
950106-00082DE
September 2018
EXCAVATOR

Copyright Doosan 2011Operation and Maintenance Manual
Operation & Maintenance Manual
DX235LCR EXCAVATOR
Serial Number 5001 and Up
950106-00082DE
September 2018
© Doosan Infracore 2018
DOOSAN and the DOOSAN logo are registered
trademarks of DOOSAN Corporation in the United
States and various other countries around the
world.

Table of Contents
I
DX235LCR
Table of Contents
EC Declaration of Conformity ............................................................0-1
Safety..........................................................................................1-1
To the Operator of a DOOSAN Excavator.........................................1-1
Safety Decals..................................................................................... 1-4
Visibility Information.........................................................................1-18
Summary of Safety Precautions for Lifting in Digging Mode............ 1-20
Unauthorized Modifications..............................................................1-21
General Hazard Information.............................................................1-21
Before Starting Engine.....................................................................1-30
Machine Operation...........................................................................1-35
Maintenance ....................................................................................1-43
Battery..............................................................................................1-52
Towing .............................................................................................1-54
Shipping and Transportation............................................................ 1-55
Excavator Rated Lift Capacity Tables..............................................1-56
Operating Controls....................................................................2-1
Component Locations........................................................................2-2
Operator's Area.................................................................................. 2-4
Operational Controls and Panels.......................................................2-6
Instrument Panel..............................................................................2-19
Multifunction Gauge and Graphic Information .................................2-25
Mode Selector Buttons.....................................................................2-31
Setting Main Menu...........................................................................2-33
Flow Control.....................................................................................2-42
Operation Selection Display.............................................................2-44
Heater and Air Conditioner Control Panel........................................2-47
Stereo ..............................................................................................2-52

DX235LCRTable of Contents
II
Miscellaneous Electrical Devices.....................................................2-53
Seat Adjustment...............................................................................2-55
Ceiling Cover ...................................................................................2-59
Front Windows.................................................................................2-60
Door Side Latch...............................................................................2-62
Cabin Storage Compartments .........................................................2-63
Ashtray.............................................................................................2-63
Sun Visor .........................................................................................2-64
Hanger............................................................................................. 2-64
Cup Holder.......................................................................................2-64
Emergency Glass Breaking Tool .....................................................2-65
Miscellaneous Access Covers and Doors........................................2-66
Operation....................................................................................3-1
To Handle a New Excavator..............................................................3-1
Starting and Stopping the Engine......................................................3-2
Safety Lever.....................................................................................3-13
Travel...............................................................................................3-14
Operating Instructions......................................................................3-21
Operating Precautions.....................................................................3-27
Parking Excavator............................................................................3-32
Towing Procedure............................................................................3-33
Hydraulic Attachments (Optional).................................................... 3-34
Adjusting the Pump Flow.................................................................3-39
Lifting Objects..................................................................................3-42
Operation Under Unusual Conditions.............................................. 3-44
Inspection, Maintenance and Adjustment...............................4-1
Preventive Maintenance ....................................................................4-1
Preliminary Work Machine Setup for Maintenance............................4-4
Table of Recommended Lubricants...................................................4-6
Fluid Capacities .................................................................................4-9
Lubrication and Service Chart..........................................................4-10

Table of Contents
III
DX235LCR
Maintenance Intervals...................................................................... 4-13
10 Hour / Daily Service.................................................................... 4-15
50 Hour / Weekly Service ................................................................4-27
250 Hour / Monthly Service..............................................................4-30
500 Hour / 3 Month Service.............................................................4-36
1,000 Hour / 6 Month Service..........................................................4-46
2,000 Hour / Yearly Service.............................................................4-56
4,000 Hour / Biennial Service ..........................................................4-62
12,000 Hour / 6 Year Service...........................................................4-63
Air-Conditioning System ..................................................................4-64
Bucket..............................................................................................4-65
Electrical System .............................................................................4-67
Engine Cooling System....................................................................4-71
Fuel Transfer Pump (Optional) ........................................................4-74
Handling of Accumulator.................................................................. 4-77
Track Tension..................................................................................4-78
Venting and Priming Hydraulic System............................................4-80
Long Term Storage..........................................................................4-82
Maintenance in Special Conditions..................................................4-83
Transportation ...........................................................................5-1
Loading and Unloading......................................................................5-1
Lifting Machine...................................................................................5-6
Specification ..............................................................................6-1
Standard Specification.......................................................................6-1
Overall Dimensions............................................................................6-2
Working Range.................................................................................. 6-4
Approximate Weight of Workload Materials.......................................6-6
Index ...........................................................................................7-1

DX235LCRTable of Contents
IV

0-1
DX235LCR
EC DECLARATION OF CONFORMITY
Doosan Benelux SA, Drève Richelle 167, 1410 Waterloo, (Belgium), 
as authorized representative in the European Community of Doosan Infracore Co., Ltd. (Korea), 
certifies that the construction equipment machinery.
Type of Machine : HYDRAULIC CRAWLER EXCAVATOR
Manufacturer : Doosan Infracore Co., Ltd., 489, Injung-ro, Dong-gu, Incheon, Korea
Technical file : Doosan Benelux SA, Drève Richelle 167, 1410 Waterloo, (Belgium)
Brand : Doosan
Model Name : DX235LCR
Serial Number :
Year of Manufacturing. :
Engine Manufacturer : Doosan
Engine Model : DL06
Net Installed Power : 128.7 kW / 1,900 rpm (SAE J1995)
Net Power : 123.5 kW / 1,900 rpm (SAE J1349)
Pertinent EC noise emission requirement :
Has been manufactured in conformity with the provisions of the Directive 2000/14/EC, 
as stated below;
Certificate No. : SNCH*2000/14*2005/88*2508*00
Certification Issued Date : November 12th, 2014
Conformity Assessment Procedure : Annex VIII Full Quality Assurance
Notified Body Involved : Société Nationale de Certification et d'Homologation (SNCH) 
2a. Kalchesbruck, L-1852 Luxemburg (Luxembourg)
Notified Body 0499 for EC Directive 2000/14/EC
Measured Sound Power Level : 102 dB(A)
Guaranteed Sound Power Level : 103 dB(A)
Has been manufactured in conformity with the provisions of 
2006/42/EC (Machinery), 97/68/EC (Exhaust Gas Emission),
2004/108/EC or 2014/30/EU (Electromagnetic Compatibility)
Designed and manufactured in accordance with the sound engineering practice as valid for Class I
or Article 3.3 items of 97/23/EC.
B1410 - Waterloo
Signature
Sales Director

DX235LCR0-2

Safety
1-1
DX235LCR
1Safety
TO THE OPERATOR OF A
DOOSAN EXCAVATOR
Please respect the importance of taking responsibility for your
own safety, and that of other people who may be affected by
your actions.
The safety information on the following pages is organized into
the following sections:
1. "Safety Decals" on page 1-4
2. "Visibility Information" on page 1-18
3. "Summary of Safety Precautions for Lifting in Digging
Mode" on page 1-20
4. "Unauthorized Modifications" on page 1-21
5. "General Hazard Information" on page 1-21
6. "Before Starting Engine" on page 1-30
7. "Machine Operation" on page 1-35
8. "Maintenance" on page 1-43
9. "Battery" on page 1-52
10. "Towing" on page 1-54
11. "Shipping and Transportation" on page 1-55
12. "Excavator Rated Lift Capacity Tables" on page 1-56
DANGER
AVOID DEATH
Unsafe use of the excavator could lead to serious injury or
death. Operating procedures, maintenance and equipment
practices or traveling or shipping methods that do not
follow the safety guidelines on the following pages could
cause serious, potentially fatal injuries or extensive
damage to the machine or nearby property.

DX235LCRSafety
1-2
WARNING
Improper operation and maintenance of this machine can
be hazardous and could result in serious injury or death.
Operator and maintenance personnel should read this
manual thoroughly before beginning operation or
maintenance.
Keep this manual in the storage compartment to the rear of
the operator's seat, and have all personnel involved in
working on the machine read the manual periodically.
Some actions involved in operation and maintenance of the
machine can cause a serious accident, if they are not done
in a manner described in this manual.
The procedures and precautions given in this manual apply
only to intended uses of the machine.
If you use your machine for any unintended uses that are
not specifically prohibited, you must be sure that it is safe
for any others. In no event should you or others engage in
prohibited uses or actions as described in this manual.
DOOSAN delivers machines that comply with all applicable
regulations and standards of the country to which it has
been sent. If this machine has been purchased in another
country or purchased from someone in another country, it
may lack certain safety devices and specifications that are
necessary for use in your country. If there is any question
about whether your product complies with the applicable
standards and regulations of your country, consult
DOOSAN or your DOOSAN distributor before operating the
machine.
SAFETY ALERT SYMBOL
Be Prepared - Get to Know All Operating and Safety
Instructions.
This is the Safety Alert Symbol. Wherever it appears in this
manual or on safety signs on the machine you must be alert
to the potential for personal injury or accidents. Always
observe safety precautions and follow recommended
procedures.

Safety
1-3
DX235LCR
Learn Signal Words Used with Safety Alert
Symbol
The words "CAUTION", "WARNING", and "DANGER" used
throughout this manual and on decals on the machine indicate
degree of risk of hazards or unsafe practices. All three degrees
of risk indicate that safety is involved. Observe precautions
indicated whenever you see the Safety Alert "Triangle", no
matter which signal word appears next to "Exclamation Point"
symbol.
Other Signal Words
In addition to safety signal words, the following signal words are
used to indicate proper and effective use of machine.
NOTE: The word "NOTE" identifies information for effective
use.
CAUTION
This word is used on safety messages and safety labels and
indicates potential of a hazardous situation that, if not
avoided, could result in minor or moderate injury. It may
also be used to alert against a generally unsafe practice.
WARNING
This word is used on safety messages and safety labels and
indicates potential threat of a hazardous situation that, if
not avoided, could result in serious injury or death. It may
also be used to alert against highly unsafe practice.
DANGER
This word is used on safety messages and safety labels and
indicates an imminent hazard of a situation that, if not
avoided, is very likely to cause death or extremely serious
injury. It may also be used to alert against equipment that
may detonate or explode if handled or treated carelessly.
IMPORTANT
This signal word identifies procedures which must be
followed to avoid damage to machine.

DX235LCRSafety
1-4
SAFETY DECALS
Safety decals are attached to the machine to alert the operator
or maintenance person about potential hazards, the
consequences of potential injury, and instructions and/or actions
required to avoid the hazard. The location of the safety decals
and the description of the decals are reviewed in the following
section. Please become familiarized with all safety decals and
their messages.
Make sure that all the safety decals are in their correct location
and legible. Clean or replace the safety decals if they are
damaged, missing, or the texts and pictorials are not legible.
When you clean the safety decals, use a soft cloth, water, and
soap. Do not use solvent, gasoline, or other harsh chemicals to
clean the safety decals because this could loosen the adhesive
that secures the decals to the machine. Remember, if a safety
decal is attached to a part that is replaced, install a new safety
decal on the replacement part.
This machine uses safety decals with and without text. The type
and number of safety decals can vary depending upon
geographical regions and machine models.
Safety Decals With Text
Safety decals with text consist of a signal word, pictorial and a
text message panel. In some cases, a pictorial panel may not be
part of the safety decal.

Safety
1-5
DX235LCR
Safety Decals Without Text (No-Text)
Safety decals without text consist of a safety sign and safety
information panel. The safety sign panel is located at the top or
left side and the safety information panel is located at the bottom
or right side of the decal depending on its configuration. The
safety sign panel uses a black triangular band and a pictorial to
identify the hazard and the potential consequences of the failure
to follow instructions. The safety information panel uses
pictorials and/or prohibition signs to identify the actions
necessary to avoid the hazard.
Horizontal Configuration
Vertical Configuration
Hazard
Panel
Avoidance
Panel
Hazard
Panel Avoidance Panel
FG018723
Figure 1

DX235LCRSafety
1-6
Information and Location for Safety Decals
EX1402438
18
33
14
23 23
2
24 21 15 1
Figure 2

Safety
1-7
DX235LCR
Information and Location for Safety Decals (Continued)
EX1402439
413
22 9 22
10
17
12
11
465
7, 8
Figure 3

DX235LCRSafety
1-8
1. General Hazard (950205-03804)
WARNING
AVOID DEATH OR SERIOUS INJURY
• Never use excavator without instructions.
• Read Operation & Maintenance Manual before
operation.
• Sound the horn to alert bystanders before
operating.
• Always fasten your seat belt.
• Explosion or electrocution can occur if machine
contacts utility lines or pipes. Check for overhead
or underground lines before operating.
• Secure and lock front window when it is in raised
position.
• Attachment interference can cause death, serious
injury or machine damage. Check attachment to
machine clearance through full working cycle
before operation.
• Keep bystanders out of swing area and travel
path and always look in the travel direction.
• Ensure mirrors and rear view camera are clean
and working properly.
• Never operate machine from outside the
operator's position.
• TO LEAVE THE EXCAVATOR:
1) Lower the attachment and dozer blade (if
equipped) to the ground and make sure all
controls are in neutral.
2) Stop engine and remove key.
3) Lower safety lever to LOCK position.
EX1301176
1
2
3

Safety
1-9
DX235LCR
2. Warning Tag - "Do Not Operate" (950205-03802)
3. Keep Bystanders Away (950205-03803)
4. Hot Pressurized Fluid (950205-03781)
5. Entanglement in Rotating Parts (950205-03791)
EX1301177
WARNING
AVOID DEATH OR SERIOUS INJURY
• Stop engine and remove key.
• Attach "DO NOT OPERATE" warning tag to the
controls before servicing the machine.
• Do not operate when performing inspection or
maintenance.
WARNING
AVOID DEATH OR SERIOUS INJURY
• Keep out of swing area and travel path.
• Always look in the travel direction.
• Make sure swing area is clear of bystanders and
objects.
EX1301180
WARNING
HOT PRESSURIZED FLUID CAN CAUSE
SERIOUS BURNS
• Do not loosen or open cap when hot.
• Before opening:
1) Turn engine off.
2) Allow machine to cool.
3) Tip cap and open slowly to relieve pressure.
EX1301181
WARNING
ROTATING PARTS CAN CAUSE DEATH OR
SERIOUS INJURY
Keep away from belt and rotating parts. Stop engine
before servicing.

DX235LCRSafety
1-10
6. Rotating Fan (950205-03788)
7. Battery Explosion (950205-03785)
8. Battery Disconnection (950205-03784)
EX1301182
950205-03788
WARNING
CONTACT WITH ROTATING FAN CAN CAUSE
DEATH OR SERIOUS INJURY
Keep away from fan and rotating parts. Stop engine
before servicing.
EX1301183
WARNING
AVOID DEATH OR SERIOUS INJURY
• Read and follow instructions in Operation &
Maintenance Manual for battery maintenance.
• Keep arcs, sparks, flames, and lighted tobacco
away.
• Do not store metal tools or flammable materials
on or around batteries.
• Wear safety goggles and rubber gloves when
working with batteries.
• If battery acid contact occurs:
1) Flush your skin with water immediately and
apply baking soda or lime to neutralize the
acid.
2) Flush your eyes with water for 10 - 15
minutes.
3) Get medical attention immediately.
IMPORTANT
AVOID ELECTRICAL COMPONENT DAMAGE
Disconnecting the battery while the engine is running
can cause damage to electrical components.
Disconnect battery only when the engine is turned
OFF.