CASE CX20B MINI EXCAVATOR Service Repair Manual Instant Download

1
HYDRAULIC EXCAVATOR
CX20B CX22B CX27B
SHOP MANUAL
model
INDEX
1 SPECIFICATIONS
2 MAINTENANCE
3 SYSTEM
4 DISASSEMBLING
5 TROUBLESHOOTING
6 ENGINE
7 INSTALLATION PROCEDURES FOR OPTIONAL ATTACHMENT
8 SUPPORTING DATA
No. 9-91841 EN
Printed by Studio ti - 53004 - 2004.12
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SAFETY PRECAUTIONS
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SAFETY PRECAUTIONS

• alert against possible damage to the machine and
  its components and is represented as fol- lows
• SCAUTION
• It is very difficult to forecast every danger
  that may occur during operation. However, safety
  can be en- sured by fully understanding proper
  operating pro- cedures for this machine
  according to methods recommended by
  Manufacturer.
• While operating the machine, be sure to perform
  work with great care, so as not to damage the ma-
  chine, or allow accidents to occur.
• Continue studying the manual until all Safety,
  Oper- ation and Maintenance procedures are
  completely understood by all persons working
  with the ma- chine.

GENERAL SAFETY INFORMATION
SWARNING Do not operate or perform any
maintenance on this machine until all
instructions found in the OPERA- TION
MAINTENANCE MANUAL have been thor- oughly read
and understood. Improper operation or maintenance
of this machine may cause accidents and could
result in serious in- jury or death. Always keep
the manual in storage. If it is missing or
damaged, place an order with an authorized our
Distributor for a replacement. If you have any
questions, please consult an au- thorized our
Distributor.

1. Most accidents, which occur during operation, are
   due to neglect of precautionary measures and
   safe- ty rules. Sufficient care should be taken
   to avoid these accidents. Erroneous operation,
   lubrication or maintenance services are very
   dangerous and may cause injury or death of
   personnel. Therefore all precautionary measures,
   NOTES, DANGERS, WARNINGS and CAUTIONS contained
   in the man- ual and on the machine should be
   read and under- stood by all personnel before
   starting any work with or on the machine.
2. Operation, inspection, and maintenance should be
   carefully carried out, and safety must be given
   the first priority. Messages of safety are
   indicated with marks. The safety information
   contained in the manual is intended only to
   supplement safety codes, insurance requirements,
   local laws, rules and regulations.

• Messages of safety appear in the manual and on
  the machine All messages of safety are
  identified by either word of "DANGER", "WARNING"
  and "CAUTION".
• DANGER- Indicates an imminently hazardous
  situation which, if not avoided, will result in
  death or serious injury and is represented as
  follows
• SDANGER
• WARNING- Indicates a potentially hazardous
  situation which, if not avoided, could result in
  death or serious injury and is represented as
  follows
• SWARNING
• CAUTION- Indicates a potentially hazardous
  situation which, if not avoided, may result in
  mi- nor or moderate injury. It may also be used
  to
• 0-2

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SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
SWARNING Do not operate this machine unless you
have read and understand the instructions in the
OPERATORS MANUAL. Improper machine operation
is dangerous and could result in in- jury or
death.
SWARNING The proper and safe lubrication and
maintenance for this machine, recommended by
Manufacturer, are outlined in the OPERATORS
MANUAL for the machine. Improper performance of
lubrication or mainte- nance procedures are
dangerous and could result in injury or death.
Read and understand the MAN- UAL before
performing any lubrication or mainte- nance.

1. Relieve all pressure in air, oil or water systems
   be- fore any lines, fittings or related items
   are discon- nected or removed. Always make sure
   all raised components are blocked correctly and
   be alert for possible pressure when
   disconnecting any device from a system that
   utilizes pressure.
2. Lower the bucket, dozer, or other attachments to
   the ground before performing any work on the ma-
   chine. If this cannot be done, make sure the
   buck- et, dozer, ripper or other attachment is
   blocked correctly to prevent it from dropping
   unexpectedly.

The serviceman or mechanic may be unfamiliar with
many of the systems on this machine. This makes
it important to use caution when performing
service work. A knowledge of the system and or
components is im- portant before the removal or
disassembly of any com- ponent. Because of the
size of some of the machine compo- nents, the
serviceman or mechanic should check the weights
noted in this manual. Use proper lifting proce-
dures when removing any components. Weight of com-

1. Use steps and grab handles when mounting or
   dismounting a machine. Clean any mud or debris
   from steps, walkways or work platforms before us-
   ing. Always face to the machine when using
   steps, ladders and walkways. When it is not pos-
   sible to use the designed access system, provide
   ladders, scaffolds, or work platforms to perform
   safe repair operations.
2. To avoid back injury, use a hoist when lifting
   com- ponents which weigh 20 kg (45 lbs) or more.
   Make sure all chains, hooks, slings, etc., are
   in good condition and are the correct capacity.
   Be sure hooks are positioned correctly. Lifting
   eyes are not to be side loaded during a lifting
   operation.

ponents table is shown in the section
SPECIFICATIONS. The following is a list of basic
precautions that must al- ways be observed.

1. Read and understand all Warning plates and de-
   cal on the machine before Operating, Maintaining
   or Repairing this machine.
2. Always wear protective glasses and protective
   shoes when working around machines. In partic-
   ular, wear protective glasses when using ham-
   mers, punches or drifts on any part of the
   machine or attachments. Use welders gloves,
   hood/gog- gles, apron and the protective
   clothing appropriate to the welding job being
   performed. Do not wear loose fitting or torn
   clothing. Remove all rings from fingers, loose
   jewelry, confine long hair and loose clothing
   before working on this machinery.
3. Disconnect the battery and hang a "Do Not Oper-
   ate" tag in the Operators Compartment. Remove
   ignition keys.
4. If possible, make all repairs with the machine
   parked on a level, hard surface. Block the ma-
   chine so it does not roll while working on or
   under the machine. Hang a "Do Not Operate" tag
   in the Operators Compartment.
5. Do not work on any machine that is supported only
   by lift, jacks or a hoist. Always use blocks or
   jack stands, capable of supporting the machine,
   before performing any disassembly.

1. To avoid burns, be alert for hot parts on
   machines which have just been stopped and hot
   fluids in lines, tubes and compartments.
2. Be careful when removing cover plates. Gradually
   back off the last two capscrews or nuts located
   at opposite ends of the cover or device and
   carefully pry cover loose to relieve any spring
   or other pres- sure, before removing the last
   two capscrews or nuts completely.
3. Be careful when removing filler caps, breathers
   and plugs on the machine. Hold a rag over the
   cap or plug to prevent being sprayed or splashed
   by liquids under pressure. The danger is even
   greater if the machine has just been stopped be-
   cause fluids can be hot.
4. Always use the proper tools that are in good con-
   dition and that are suited for the job at hand.
   Be

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SAFETY PRECAUTIONS

• sure you understand how to use them before per-
  forming any service work.
• Reinstall all fasteners with the same part
  number. Do not use a lesser quality fastener if
  replace- ments are necessary.
• Repairs which require welding should be per-
  formed only with the benefit of the appropriate
  ref- erence information and by personnel
  adequately trained and knowledgeable in welding
  proce- dures. Determine type of metal being
  welded and select correct welding procedure and
  electrodes, rods or wire to provide a weld metal
  strength equivalent at least to that of the
  parent metal. Make sure to disconnect battery
  before any weld- ing procedures are attempted.
• Do not damage wiring during removal operations.
  Reinstall the wiring so it is not damaged nor
  will be damaged in operation of the machine by
  contact- ing sharp corners, or by rubbing
  against some ob- ject or hot surface. Do not
  connect wiring to a line containing fluid.
• Be sure all protective devices including guards
  and shields are properly installed and
  functioning correctly before starting a repair.
  If a guard or shield must be removed to perform
  the repair work, use extra caution and replace
  the guard or shield after repair is completed.
• The maintenance and repair work while holding
  the bucket raised is dangerous due to the
  possibil- ity of a falling attachment. Dont
  fail to lower the at- tachment and place the
  bucket to the ground before starting the work.
• Loose or damaged fuel, lubricant and hydraulic
  lines, tubes and hoses can cause fires. Do not
  bend or strike high pressure lines or install
  ones which have been bent or damaged. Inspect
  lines, tubes and hoses carefully. Do not check
  for leaks with your hands. Very small (pinhole)
  leaks can re- sult in a high velocity oil stream
  that will be invisi- ble close to the hose. This
  oil can penetrate the skin and cause personal
  injury. Use card-board or paper to locate
  pinhole leaks.
• Tighten connections to the correct torque. Make
  sure that all heat shields, clamps and guards are
  installed correctly to avoid excessive heat,
  vibra- tion or rubbing against other parts
  during opera- tion. Shields that protect against
  oil spray onto hot exhaust components in event
  of a line, tube or seal failure must be
  installed correctly.
• Do not operate a machine if any rotating part is
  damaged or contacts any other part during opera-
  tion. Any high speed rotating component that has

been damaged or altered should be checked for
balance before reusing. (22) Be careful when
servicing or separating the tracks (crawlers).
Chips can fly when removing or install- ing a
track (crawlers) pin. Wear safety glasses and
long sleeve protective clothing. Tracks
(crawlers) can unroll very quickly when
separated. Keep away from front and rear of
machine. The ma- chine can move unexpectedly
when both tracks (crawlers) are disengaged from
the sprockets. Block the machine to prevent it
from moving.
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SAFETY PRECAUTIONS
CX20B CX22B CX27B
INDEX
Title Index No.
SPECIFICATIONS OUTLINE 1
SPECIFICATIONS SPECIFICATIONS 2
SPECIFICATIONS ATTACHMENT DIMENSIONS 3
MAINTENANCE TOOLS 11
MAINTENANCE STANDARD MAINTENANCE TIME TABLE 12
MAINTENANCE MAINTENANCE STANDARDS AND TEST PROCEDURES 13
SYSTEM HYDRAULIC SYSTEM 22
SYSTEM ELECTRICAL SYSTEM 23
SYSTEM COMPONENTS SYSTEM 24
DISASSEMBLING WHOLE DISASSEMBLING ASSEMBLING 31
DISASSEMBLING ATTACHMENTS 32
DISASSEMBLING UPPER SLEWING STRUCTURE 33
DISASSEMBLING TRAVEL SYSTEM 34
TROUBLESHOOTING HYDRAULIC SYSTEM 42
TROUBLESHOOTING ELECTRICAL SYSTEM 43
TROUBLESHOOTING ENGINE 44
E/G ENGINE 51
OPT.
OPT.
DATA SUPPORTING DATA 71
APPLICABLE MACHINES
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SAFETY PRECAUTIONS
NOTE This Manual is prepared as a technical
material in which the information necessary for
the maintenance and repairing services of our
hydraulic excavators are collected, and is
categorized into 8 Chapters, Specifica- tion,
Maintenance, System, Disassembly, Trouble-
shooting, Engine, and Installation Procedures for
Optional Attachment, and Supporting Data.
This Manual may be properly revised due to the
im- provement of products, modification of
specifications, etc. And there are cases where
the system on actual machine and a part of the
contents of this manual may differ due to the
variations of specification by countries. For
the section in which the description is hardly
under- stood, contact our distributor.
The number is assigned to every part handled in
this Manual on account of the description, but
the parts, which cannot be supplied as service
parts are con- tained. Therefore, the order must
be placed with re- spective formal number with
due confirmation on the Parts Manual for
applicable machine

• The Chapter "Specification" describes the
  specifi- cations for entire machine and
  material, which are instructive for replacement
  and repairing of attach- ments.
• The Chapter "Maintenance" describes the material,
  which is helpful for maintenance service and
  adjust- ments for entire machine.
• The Chapter "System" describes the operating sys-
  tem like hydraulic system, electric system,
  compo- nents, and so on.
• The Chapter "Disassembly" describes the removal
  and installing of assembly mounted on the upper
  structure and undercarriage, and the assembling
  and disassembling of the associated hydraulic
  equipment.
• The Chapter "Troubleshooting" describes how to
  find the fault equipment.
• The Chapter "Engine" describes the engines mak-
  ing use of the "Maintenance Manual" provided by
  the suppliers.
• The Chapter "Installation Procedures for Optional
  Attachment" describes the supplements added on
  request as required.
• The Chapter "Supporting Data" describes the con-
  tents of added material in A3 size like hydraulic
  cir- cuit diagram, electric circuit diagram, and
  so on. It is recommended to use together with
  the texts in re- spective Chapter and Section.

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1. OUTLINE
TABLE OF CONTENTS 1.1 GENERAL PRECAUTIONS FOR
REPAIRS ..........................................
........... 1-3 1.1.1 PREPARATION BEFORE
DISASSEMBLING ...................................
........... 1-3 1.1.2 SAFETY IN DISASSEMBLING AND
ASSEMBLING ....................................
1-3 1.1.3 DISASSEMBLING AND ASSEMBLING HYDRAULIC
EQUIPMENT ............ 1-3 1.1.4 ELECTRICAL
EQUIPMENT ........................................
.................................. 1-4 1.1.5
HYDRAULIC PARTS ..................................
..................................................
. 1-5 1.1.6 WELDING REPAIR ......................
..................................................
............... 1-5 1.1.7 ENVIRONMENTAL MEASURE
..................................................
................... 1-5 1.2 INTERNATIONAL UNIT
CONVERSION SYSTEM ................................
........... 1-6
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1. OUTLINE
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1. OUTLINE
GENERAL PRECAUTIONS FOR REPAIRS PREPARATION BEFOR
E DISASSEM- BLING

1. Suspend warning tag "DO NOT OPERATE" from the
   doorknob or the operating lever, and have a
   preliminary meeting before starting work.
2. Stop the engine before starting inspection and
   maintenance to prevent the operator being caught
   in machine.
3. Identify the location of a first-aid kit and a
   fire extin- guisher, and also where to make
   contact in a state of emergency.
4. Choose a hard, level and safe place, and place
   the attachment on the ground securely.
5. Use a lifter such as a crane to remove heavy
   parts (20 kg 45 lbs or more) from the machine.
6. Use proper tools, and replace or repair defective
   tools.
7. Support the machine and attachment with supports
   or blocks if the work is performed in the lifted
   condi- tion.

1.1
1.1.1

• Understanding operating procedure
• Read OPERATION MAINTENANCE MANUAL
• carefully to understand the operating procedure.
• Cleaning machines
• Remove soil, mud, and dust from the machine be-
  fore carrying it into the service shop to prevent
  loss of work efficiency, damage of parts, and
  difficulty in rust prevention and dust
  protection while reassem- bling.
• Inspecting machines
• Identify the parts to be disassembled before
  start- ing work, determine the disassembling
  procedure by yourself considering the workshop
  situations etc., and request procurement of
  necessary parts in advance.
• Recording
• Record the following items for communication and
  prevention of recurring malfunction.

DISASSEMBLING AND ASSEMBLING HY- DRAULIC
EQUIPMENT
1.1.3
(1) Removing hydraulic equipment

1. Before disconnecting pipes, release the hy-
   draulic pressure of the system, or open the re-
   turn side cover and take out the filter.
2. Carefully drain oil of the removed pipes into a
   containers without spilling on the floor.
3. Apply plugs or caps on the pipe ends to avoid
   oil spillage and dust intrusion.
4. Clean off the external surface of the equipment
   before disassembling, and drain hydraulic and
   gear oil before placing it on the workbench.

1. Inspection date and place
2. Model name, applicable machine number, and hour
   meter read
3. Trouble condition, place and cause.
4. Visible oil leakage, water leakage and damage
5. Clogging of filters, oil level, oil quality, oil
   con- tamination and loosening of connections
6. Result of consideration if any problem exists
   based on the operation rate per month calculat-
   ed from hour meter indication after the last in-
   spection date.

(2) Disassembling hydraulic equipment

1. Do not disassemble, reassemble or modify the
   hydraulic equipment without the permission of
   the manufacturer, who is not responsible for the
   performance and function of the product after
   modification.
2. When disassembling and reassembling for un-
   avoidable reason, refer the work to qualified
   personnel who have the specific knowledge or
   completed the parts service training.
3. Provide matching marks to facilitate reassem-
   bling work.
4. Before starting the work, read the manual of
   disassembling procedure, if it is provided, and
   decide whether the work can be performed by
   yourself.

(5) Arrangement and cleaning in service shop

1. Tools required for repair work.
2. Prepare space to place the disassembled parts.
3. Prepare oil containers for draining oil etc.

SAFETY IN DISASSEMBLING AND AS- SEMBLING
1.1.2
(1) Wear appropriate clothes with long sleeves,
safety shoes, safety helmet and protective
glasses.
1-3
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1. OUTLINE

1. Use the special jig and tools without fail if
   they are specified.
2. If it is hard to remove a part according to the
   procedure, do not try it by force but investigate
   the cause.
3. Place the removed parts in order and attach tags
   to facilitate the reassembling.
4. Note the location and quantity of parts com-
   monly applied to multiple locations.

SWARNING Operation of the hydraulic equipment
with- out filling hydraulic oil or lubricant or
with- out performing air bleeding will result in
damage to the equipment.

• Perform air bleeding of the hydraulic pump and
  slewing motor after loosening the upper drain
  plug, starting the engine and keep it in low idle
  condition.
• Complete the air bleeding when seeping of hy-
  draulic oil is recognized, and tightly plug.
• Perform air bleeding of the travel motor and the
  hydraulic cylinders by running the engine for
  more than 5 minutes at low speed without load.

(3) Inspecting parts

1. Ensure that the disassembled parts are free from
   seizure, interference and uneven contact.
2. Measure and record wear condition of parts and
   clearance.
3. If the problem is found in a part, repair or re-
   place it with a new one.

SWARNING Do not allow the hydraulic cylinder to
bot- tom on the stroke end just after the
mainte- nance.
(4) Reassembling hydraulic equipment
1) Turn ON the ventilation fan or open windows to
maintain good ventilation prior to starting the
cleaning of parts.

1. Perform rough and finish cleaning before as-
   sembling.
2. Remove washing oil by air and apply clean hy-
   draulic or gear oil for assembling.
3. Always replace the removed O-rings, backup rings
   and oil seals with new ones by applying grease
   in advance.
4. Remove dirt and moisture from and perform de-
   greasing on the surface where liquid gasket to
   be applied.
5. Remove rust preventive agent from the new parts
   before use.
6. Fit bearings, bushings and oil seals using spe-
   cial jigs.
7. Assemble the parts utilizing matching marks.
8. Ensure all the parts are completely assembled
   after the work.

1. Perform air bleeding of pilot line by performing
   a series of digging, slewing and travel.
2. Check hydraulic oil level after placing the at-
   tachment to the oil check position, and replen-
   ish oil if necessary.

1.1.4
ELECTRICAL EQUIPMENT

1. Do not disassemble electrical equipment.
2. Handle it carefully not to drop and give a shock.
3. Turn the key OFF prior to connecting and discon-
   necting work.
4. Disconnect the connector by holding it and press-
   ing the lock. Do not pull the wire to apply
   force to the caulking portion.
5. Connect the connector and ensure it is completely
   locked.
6. Turn the key OFF prior to touching the terminal
   of starter or generator.
7. Remove the ground (earth) terminal of battery
   when handling tools around the battery or its
   relay.
8. Do not splash water on the electrical equipment
   and connectors during machine washing.
9. Check for moisture adhesion inside the waterproof
   connector after pulling it out, since it is hard
   to re- move moisture from the connector.

• Installing hydraulic equipment
• Ensure hydraulic oil and lubricant are properly
  supplied.
• Perform air bleeding when

1. Hydraulic oil changed
2. Parts of suction side piping replaced
3. Hydraulic pump installed
4. Slewing motor installed
5. Travel motor installed
6. Hydraulic cylinder installed

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1. OUTLINE

• 1.1.6 WELDING REPAIR
• Refer repair welding to qualified personnel
  accord- ing to the appropriate procedure.
• Disconnect the ground (earth) cable of the
  battery before starting the repair.
• Failure to do so will cause damage to the
  electrical equipment.
• Move away the articles in advance that may cause
  fire if exposed to sparks.
• Before starting the repair of the attachment, do
  not fail to cover the plated surface of the
  piston rod with flameproof sheet to prevent it
  from being exposed to sparks.
• 1.1.7 ENVIRONMENTAL MEASURE
• Run the engine at the place that is sufficiently
  ven- tilated.
• Industrial waste disposal
• Dispose of the following parts according to the
  rel- evant regulations
• Waste oil and waste container Battery
• Precautions for handling hydraulic oil
• Exposure of eyes to hydraulic oil will cause
  inflam- mation. Wear protective glasses before
  handling to avoid an accident. If an eye is
  exposed to the oil, take the following emergency
  measures

If moisture adhesion is found, dry it completely
be- fore the connection.
SWARNING Battery electrolyte is
hazardous. Battery electrolyte is dilute sulfuric
acid. Exposure of skin or eyes to this liquid
will cause burning or loss of eyesight. If the
exposure occurs, take the following emergen- cy
measures and seek the advice of a medical spe-
cialist.

• When skin exposed
• Wash with water and soap sufficiently.
• When eyes exposed
• Immediately wash away with city water continu-
  ously for more than 10 minutes.
• When a large amount of the liquid flows out
  Neutralize with sodium bicarbonate or wash away
  with city water.
• When swallowed
• Drink a large amount of milk or water.
• When clothes exposed Immediately undress and
  wash.

1.1.5 HYDRAULIC PARTS

• When an eye exposed
• Immediately wash away with city water suffi-
  ciently till stimulative feeling vanishes.
• When swallowed
• Do not let vomit, and receive medical treatment
  immediately.
• When skin exposed
• Wash with water and soap sufficiently.

(1) O-ring

• Ensure O-rings have elasticity and are not dam-
  aged before use.
• Use the appropriate O-rings. O-rings are made of
  various kinds of materials having different
  hardness to apply to a variety of parts, such as
  the part for moving or fixed portion, subjected
  to high pressure, and exposed to corrosive
  fluid, even if the size is same.
• Fit the O-rings without distortion and bend.
• Always handle floating seals as a pair.

(4) Others Use replacement parts and lubricants
authorized as the manufacturers genuine parts.

• Flexible hose (F hose)
• Use the appropriate parts. Different parts are
  used depending on the working pressure even the
  size of fitting and the total length of the hose
  is same.
• Tighten the fitting at the specified torque.
  Ensure no kink, tension, interference nor oil
  leakage is recognized.

1-5
14
1. OUTLINE
(3) Derived Units Table 1-3
INTERNATIONAL UNIT CON- VERSION SYSTEM (Based on
MARKS STANDARD
1.2
QUANTITY UNIT SYMBOL
Area square meter cubic meter meter per second meter per second squared kilogram per cubic meter m2
Volume square meter cubic meter meter per second meter per second squared kilogram per cubic meter m3
Velocity square meter cubic meter meter per second meter per second squared kilogram per cubic meter m/s
Acceleration square meter cubic meter meter per second meter per second squared kilogram per cubic meter m/s2
Density square meter cubic meter meter per second meter per second squared kilogram per cubic meter kg/m3

• HANDBOOK FOR MECHANI- CAL ENGINEERS)
• Introduction
• Although this manual includes International
  System of Unit and Foot-Pound System of Units,
  if you need SI unit, refer to the following
  international system of units. Given hereinafter
  is an excerpt of the units that are re- lated to
  this manual.
• Etymology of SI Unites
• French Le Systeme International d Unites
  English International System of Units
• Construction of SI Unit System

(4) Derived Units bearing Peculiar
Designations Table 1-4
QUANTITY UNIT SYMBOL FORMULA
Frequency hertz Hz 1/s
Force newton N kg m/s 2
Pressure and Stress pascal Pa N/m2
Energy, Work and Quantity of heat joule J Nm
Power watt W J/s
Quantity of electricity coulomb C As
Electric poten- tial difference, Voltage, and Electromotive force volt V W/A
Quantity of static electrici- ty and Electric capacitance farad F C/V
Electric resistance ohm V/A
Celsius temperature celsius degree or degree C (t273.15)K
Illuminance lux lx lm/m2
Base units Table 1-1
Derived units of base units Table 1-2
Supplemen- tary units Table 1-2
SI units
SI unit system
Derived units bearing peculiar designations
Table 1-4
Derived units
Prefixes of SI (n-th power of 10, where n is an
integer) Table 1-5
(1) Base units Table 1-1
QUANTITY UNIT SYMBOL
Length meter m
Mass kilogram kg
Time second s
Electric current ampere A
Thermodynamic temperature kelvin K
Amount of sub- stance mol mol
Luminous intensity candela cd
(2) Supplementary units Table 1-2
QUANTITY UNIT SYMBOL
Plane angle radian rad
Solid angle steradian sr
1-6
15
1. OUTLINE
(5) Prefixes of SI Table 1-5
PREFIX SYMBOL MULTIPLICATION FACTORS
giga G 109
mega M 106
kilo k 103
hecto h 102
deca da 10
deci d 101
centi c 102
milli m 103
micro ? 106
nano n 109
pico p 1012
(6) Unit Conversion Table 1-6
QUANTITY Gravitational SI CONVERSION FACTOR
Mass kg kg
Force kgf N 1 kgf 9.807 N
Torque kgfm Nm kgfm 9.807 Nm
Pressure kgf/cm2 MPa 1 kgf/cm2 0.09807 MPa
Motive Power PS kW 1 PS 0.7355 kW
Revolution rpm min1 r/min 1
1 Units that are allowed to use.
1-7
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2. SPECIFICATIONS
TABLE OF CONTENTS 2.1 COMPONENTS NAME
..................................................
................................... 2-3 2.2
MACHINE DIMENSIONS ...............................
..................................................
. 2-4 2.3 SPECIFICATIONS AND PERFORMANCE
..................................................
..... 2-6 2.4 MACHINE COMPONENTS WEIGHT (DRY)
.................................................
2-7 2.5 TRANSPORTATION .........................
..................................................
.............. 2-9 2.6 TYPE OF CRAWLER SHOES
..................................................
...................... 2-11 2.7 TYPE OF BUCKET
..................................................
....................................... 2-11 2.8
ENGINE SPECIFICATIONS ...........................
.................................................
2-13 2.8.1 SPECIFICATIONS .......................
..................................................
............. 2-13 2.8.2 ENGINE PERFORMANCE CURVE
..................................................
.......... 2-14
17
2. SPECIFICATIONS
2-1
18
2. SPECIFICATIONS
2.1
COMPONENTS NAME
32
33
30 31
36
15
16 17 8 18 12
34
35
37
19 3 5 4 6 1
13
14
11 29 20 7
28 27 24
2 10 21
25
26
23
22
9
No. NAME No. NAME No. NAME No. NAME
1 Engine 2 Oil filter 3 Radiator 4 Reservoir tank
5 Air cleaner 6 Muffler 7 Fuel tank 8 Hydraulic reservoir
9 Hydraulic pump 10 Slewing motor 11 Swing cylinder 12 Control valve
13 Travel lever 14 Safety lock lever 15 Canopy 16 Operating lever
17 Dozer operating lever 18 Throttle lever 19 Monitor panel (gauge cluster) Monitor panel (gauge cluster) Monitor panel (gauge cluster)
20 Battery 21 Swivel joint 22 Travel motor 23 Slewing bearing
24 Idler assy 25 Lower roller 26 Upper roller 27 Rubber track
28 Dozer blade 29 Dozer cylinder 30 Boom 31 Boom cylinder
32 Dipper cylinder 33 Light 34 Dipper 35 Link
36 Bucket cylinder 37 Bucket
2-3
19
2. SPECIFICATIONS 2.2 MACHINE DIMENSIONS (1)
CX20B (CANOPY)
Unit mm (ftin)
170(6.7")
1400 (47.1") 610 (20.0") 555 (19.9") 90 (3.5")
55
R700
(23.6")
60
45 (1.8")
3820 (126.4")
1670 (55.7") 1310 (43.6")
1400 (47.1")
700 (23.6")
2460 (80.9")
3050 (113.86")
250 (9.8")
480 (16.9")
1350 (45.1")
250
1490 (410.7")
(9.8")
1150 (39.3")
1870 (61.6")
1400 (47.1")
2260 (75.0")
(2) CX22B (CAB)
170(6.7")
1400 (47.1") 610 (20.0") 555 (19.9") 90 (3.5")
55
R740
(25.1")
60
45 (1.8")
3820 (126.4") 1710 (57.3")
1350 (45.1")
1400 (47.1")
740 (25.1")
2460 (80.9")
3050 (113.86")
250 (9.8")
480 (16.9")
1350 (45.1")
250
1490 (410.7")
(9.8")
1150 (39.3")
1870 (61.6")
1400 (47.1")
2260 (75.0")
2-4
20
2. SPECIFICATIONS Unit mm (ftin)
(3) CX27B (CANOPY)
170(6.7")
1500 (411.1") 610 (20.0") 555
(19.9") 90 (3.5")
55
R750
(25.5")
60
45 (1.8")
4130 (136.6") 1720 (57.7")
1360 (45.5")
1400 (47.1")
750 (25.5")
2500 (82.4")
3050 (113.86")
250 (9.8")
520 (18.5")
1440 (48.7")
250
1590 (52.6")
(9.8")
1250 (41.2")
1980 (66.0")
1500 (411.1")
2410 (710.9")
(4) CX27B (CAB)
170(6.7")
1500 (411.1") 610 (20.0") 555
(19.9") 90 (3.5")
55
R750
(25.5")
60
45 (1.8")
4130 (136.6") 1720 (57.7")
1360 (45.5")
1400 (47.1")
750 (25.5")
2500 (82.4")
3050 (113.86")
250 (9.8")
520 (18.5")
1440 (48.7")
250
1590 (52.6")
(9.8")
1250 (41.2")
1980 (66.0")
1500 (411.1")
2410 (710.9")
2-5
21
2. SPECIFICATIONS 2.3 SPECIFICATIONS AND
PERFORMANCE SPEED AND GRADEABILITY
Model Model CX20B / 22B CX20B / 22B CX20B / 22B CX20B / 22B CX27B CX27B CX27B CX27B
Applicable machines Applicable machines PM07-07001 PM07-07001 PM07-07001 PM07-07001 PV10-27001 PV10-27001 PV10-27001 PV10-27001
Shoe Type Shoe Type Rubber shoe Rubber shoe Iron shoe (OPT) Iron shoe (OPT) Rubber shoe Rubber shoe Iron shoe (OPT) Iron shoe (OPT)
Slewing Speed min-1 rpm 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7
Travel Speed km/h (mph) Low (1st) High (2nd) Low (1st) High (2nd) Low (1st) High (2nd) Low (1st) High (2nd)
Travel Speed km/h (mph) 2.3 4.1 2.3 4.1 2.3 4.1 2.3 4.1
Gradeability (degree) 58 (30) 58 (30) 58 (30) 58 (30) 58 (30) 58 (30) 58 (30) 58 (30)
ENGINE
Model (YANMAR) Model (YANMAR) 3TNV82A-SYB
Type Type Water-cooled, 4-cycle type Swirl chamber type diesel engine
Number of cylinders-Bore ? Stroke Number of cylinders-Bore ? Stroke 3 - ø82 mm ? 84 mm (3.23 in ? 3.31 in)
Total Displacement L 1.330 (81.2 cuin)
Output Rating kW/min-1 PS/rpm 15.9 / 2200 21.6/2200
Intermediate Torque (Net) Nm/min-1 (lbfft/rpm) 79.0 86.0 / 1320 ? 100 (58.3 63.4 / 1320 ? 100)
Starting Motor V ? kW 12 ? 1.7
Generator V ? A 12 ? 40
HYDRAULIC COMPONENTS
Hydraulic Pump Variable displacement axial piston gear pump
Hydraulic Motor Axial piston
Hydraulic Motor w/Reducer (Travel) 2-Axial piston, 2-Speed motor
Control Valve 10-spool multiple control valve
Cylinder (Boom, Dipper, Swing, Bucket, Doz- er) Double action cylinder
Return Filter Safety valve containing/Filter Type (30?)
SIDE DIGGING DOZER
Type Type Boom swing by hydraulic cylinder Boom swing by hydraulic cylinder
Boom Swing Angle Right 55 55
Boom Swing Angle Left 70 70
Stroke of Dozer (above/below) mm (in) 425 / 290 (16.7/11.4) 445 / 335 (17.5/13.2)
WEIGHT
Machine Weight kg (lb) Rubber shoe Iron shoe Rubber shoe Iron shoe
Machine Weight kg (lb) 2100 (4630) 2240 (4940) 2490 (5490) 2620 (5780)
Upper slewing body kg (lb) 1090 (2400) ? 1310 (2890) ?
Travel system kg (lb) 720 (1590) 850 (1870) 830 (1830) 960 (2120)
Attachment (BoomSTD DipperSTD Bucket) kg (lb) 240 (530) 240 (530) 300 (660) 300 (660)
Oil Water kg (lb) 50 (110) 50 (110) ? ?
Note This figure is calculated with standard
bucket.
2-6
22
2. SPECIFICATIONS
2.4
MACHINE COMPONENTS WEIGHT (DRY)
Unit kg (lb)
MODEL CX20/22B CX20/22B CX20/22B CX20/22B
MODEL RUBBER SHOE RUBBER SHOE IRON SHOE IRON SHOE
MODEL CANOPY CAB CANOPY CAB
COMPLETE MACHINE 2100 (4630) 2240(4940) 2230 (4920) 2370 (5230)
UPPER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 1090 (2400) 1230 (2710) 1090 (2400) 1230 (2710)
UPPER FRAME 265 (584) ? ? ?
CANOPY / CAB 80 (176) 220 (485) 80 (176) 220 (485)
ENGINE 130 (287) ? ? ?
HYDRAULIC PUMP 18 (40) ? ? ?
RADIATOR 3 (7) ? ? ?
HYDRAULIC TANK 30 (66) ? ? ?
FUEL TANK 4 (9) ? ? ?
SWING BRACKET 59 (130) ? ? ?
SWING CYLINDER 23 (51) ? ? ?
SLEWING MOTOR 32 (71) ? ? ?
CONTROL VALVE 24 (53) ? ? ?
COUNTERWEIGHT 110 (243) 290 (639) 110 (243) 290 (639)
GUARD BONNET 97 (214) ? ? ?
BOOM CYLINDER 23 (51) ? ? ?
LOWER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 720 (1890) ? 850 (1870) ?
LOWER FRAME 259 (571) ? ? ?
SLEWING BEARING 36 (79) ? ? ?
TRAVEL MOTOR 27x2 (60x2) ? ? ?
LOWER ROLLER 6x6 (13x6) ? ? ?
FRONT IDLER IDLER ADJUSTER SPROCKET 17x2 (37x2) 11x2 (24x2) 5x2 (11x2) ? ? ? ? ? ? ? ? ? ?
250 mm (9.8) RUBBER CRAWLER SHOE 250 mm (9.8) IRON SHOE 75 (165) X2 ? ? ? ? 140 (309) X2 ?
SWIVEL JOINT 11 (24) ? ? ?
DOZER 100 (220) ? ? ?
DOZER CYLINDER 19 (42) ? ? ?
ATTACHMENT ASSEMBLY (ASSY OF FOLLOWINGS) 240 (530) ? ? ?
BOOM ASSEMBLY 105 (232) ? ? ?
BOOM 72 (159) ? ? ?
DIPPER CYLINDER 22 (49) ? ? ?
DIPPER ASSEMBLY 75 (165) ? ? ?
ARM 44 (97) ? ? ?
BUCKET CYLINDER 15 (33) ? ? ?
BUCKET LINK 6 (13) ? ? ?
IDLER LINK 2?2 (4?2) ? ? ?
BUCKET ASSEMBLY (STD) 57 (126) ? ? ?
FLUIDS (ASSY OF FOLLOWINGS) 50 (110) ? ? ?
HYDRAULIC OIL 24 (53) ? ? ?
FUEL 22 (49) ? ? ?
COOLANT 4 (9) ? ? ?
Note Bucket weight is shown with standard bucket
weight. 2-7
23
2. SPECIFICATIONS
Unit kg (lb)
MODEL CX27B CX27B CX27B CX27B
MODEL RUBBER SHOE RUBBER SHOE IRON SHOE IRON SHOE
MODEL CANOPY CAB CANOPY CAB
COMPLETE MACHINE 2490 (5490) 2630 (5800) 2620 (5780) 2760 (6090)
UPPER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 1310 (2890) 1450 (3200) 1310 (2800) 1450 (3200)
UPPER FRAME 265 (584) ? ? ?
CANOPY / CAB 80 (176) 220 (485) 80 (176) 220 (485)
ENGINE 130 (287) ? ? ?
HYDRAULIC PUMP 18 (40) ? ? ?
RADIATOR 3 (7) ? ? ?
HYDRAULIC TANK 30 (65) ? ? ?
FUEL TANK 4 (9) ? ? ?
SWING BRACKET 59 (130) ? ? ?
SWING CYLINDER 23 (51) ? ? ?
SLEWING MOTOR 32 (71) ? ? ?
CONTROL VALVE 24 (58) ? ? ?
COUNTERWEIGHT 290 (639) ? ? ?
GUARD BONNET 97 (214) ? ? ?
BOOM CYLINDER 24 (53) ? ? ?
LOWER FRAME ASSEMBLY (ASSY OF FOLLOWINGS) 830 (1830) ? 960 (2120) ?
LOWER FRAME 328 (723) ? ? ?
SLEWING BEARING 36 (79) ? ? ?
TRAVEL MOTOR 27X2 (60X2) ? ? ?
LOWER ROLLER 6X8 (13X8) ? ? ?
FRONT IDLER 17X2 (37X2) ? ? ?
IDLER ADJUSTER 11X2 (24X2) ? ? ?
SPROCKET 5X2 (11X2) ? ? ?
250 mm (9.8) RUBBER CRAWLER SHOE 80 (176) X2 ?
250 mm (9.8") IRON SHOE 147 (324) X2 ?
SWIVEL JOINT 11 (24) ? ? ?
DOZER 117 (260) ? ? ?
DOZER CYLINDER 20 (44) ? ? ?
ATTACHMENT ASSEMBLY (ASSY OF FOLLOWINGS) 300 (662) ? ? ?
BOOM ASSEMBLY 125 (276) ? ? ?
BOOM 88 (194) ? ? ?
DIPPER CYLINDER 28 (62) ? ? ?
DIPPER ASSEMBLY 95 (209) ? ? ?
DIPPER 51 (112) ? ? ?
BUCKET CYLINDER 17 (37) ? ? ?
BUCKET LINK 6 (13) ? ? ?
IDLER LINK 2 ? 2 (4?2) ? ? ?
BUCKET ASSEMBLY (STD) 64 (141) ? ? ?
FLUIDS (ASSY OF FOLLOWINGS) 50 (110) ? ? ?
HYDRAULIC OIL 24 (53) ? ? ?
FUEL 22 (49) ? ? ?
COOLANT 4 (9) ? ? ?
Note Bucket weight is shown with standard bucket
weight.
2-8
24
2. SPECIFICATIONS

• 2.5 TRANSPORTATION
• LOADING MACHINE ON A TRAILER
• Keep trailer bed clean. Put chocks against truck
  wheels.
• Use a ramp or loading deck. Ramps must be strong
  enough, have a low angle, and correct height.
  Load and unload machine on a level surface.
• Travel machine onto ramps slowly. Center the
  machine over the trailer.
• Lower all attachment.
• Stop engine. Remove key from switch.
• SWARNING
• Do not put chains over or against hydraulic lines
  or hoses.
• Fasten machine to trailer with chains or cables.
• During transportation, the bucket or attachments
  may hit the canopy or the cab. Therefore, set the
  machine in the transporting position by
  observing following points
• 1.Extend the bucket cylinder fully. 2.Extend the
  dipper cylinder fully. 3.Lower the boom.
• 4.If machine cannot be transported with dipper
  cylinder fully extended, remove bucket or
  attachment and extend dipper cylinder.
• TRANSPORTATION DIMENSION AND WEIGHT OF ATTACHMENT
• BOOM WITH DIPPER CYLINDER

Model CX20B / 22B CX27B
L ? H ? W mm (ftin) 1960 ? 760 ? 220 (65.2") (25.9") (8.7") 2230 ? 730 ? 220 (73.8") (24.7") (8.7")
Weight w/dipper cyl. kg (lb) 100 (220) 125 (276)
H
L
2) DIPPER BUCKET
Model CX20B / 22B CX27B
L ? H ? W 1870 ? 400 ? 450 2050 ? 400 ? 500
mm (ftin) (61.6") (13.7") (15.7") (68.7") (13.7") (17.7")
Weight kg (lb) 130 (287) 160 (353)
H
L
2-9
25
2. SPECIFICATIONS 3) ARM
Model CX20B / 22B CX27B
L ? H ? W 1280 ? 390 ? 250 1690 ? 430 ?250
mm (ftin) (42.4") (13.4") (9.8") (48.7") (17.7") (9.8")
Weight kg (lb) 75 (165) 95 (209)
H
L
4) BUCKET (Standard bucket)
Model CX20B / 22B CX27B
Heaped capacity m3(cuyd) 0.066 (0.086) 0.08 (0.105)
L ? H ? W mm (in) 640 ? 530 ? 450 (21.2") (18.9") (15.7") 650 ? 550 ? 500 (21.6") (19.7") (17.7")
Weight kg (lb) 44 (97) 46 (101)
H
L
5) DOZER w/o cylinder weight
Model CX20B / 22B CX27B
L ? H ? W 1020 ? 285 ? 1400 1,280 ? 330 ? 1,700
mm (in) (34.2") (11,2") (47.1") (37.7") (11.4") (411.1")
Weight kg (lb) 100 (220) 117 (258)
H
L
2-10
26
2. SPECIFICATIONS
2.6
TYPE OF CRAWLER SHOES
Type Model Shoe width mm (in) Total Crawler width mm (ftin) Number of Link Ground pressure kPa (psi) Ground pressure kPa (psi)
Type Model Shoe width mm (in) Total Crawler width mm (ftin) Number of Link CANOPY CAB
Rubber shoe CX20B / 22B 250 (9.8") 1400 (47.1") 76 26 (3.8) 27 (3.9)
Rubber shoe CX27B 250 (9.8") 1500 (411.1") 80 28 (4.1) 30 (4.4)
Iron shoe (option) CX20B / 22B 250 (9.8") 1400 (47.1") 39 27 (3.9) 29 (4.2)
Iron shoe (option) CX27B 250 (9.8") 1500 (411.1") 41 30 (4.4) 31 (4.5)
2.7
TYPE OF BUCKET
TYPE TYPE DIPPER DIPPER DIPPER DIPPER
Width mm (ftin) Heaped capacity m3 (cu.yd) (ISO 7451) Weight kg (lb) CX20B /22B Length 1280 mm (42.39 in) CX27B Length 1440 mm (48.69 in)
Digging buckets 250 (9.84) 0.030 (0.04) 32.92 (72.58) ? ? ? ?
Digging buckets 300 (11.81) 0.035 (0.05) 36.65 (80.80) ? ? ? ?
Digging buckets 350 (11.78) 0.040 (0.05) 40.38 (89.02) ? ? ? ?
Digging buckets 450 (15.62) 0.066 (0.09) 44.60 (98.33) ? ? ? ?
Digging buckets 500 (17.68) 0.080 (010) 46.68 (102.91) ? ? ? ?
Digging buckets 600 (111.62) 0.088 (0.11) 54.60 (120.37) ? ? ? ?
Digging buckets 700 (23.55) 0.096 (0.12) 59.56 (131.31) ? ?
Digging buckets 1000 (33.37) 0.102 (0.13) 47.23 (104.12) ? ? ? ?
Cleaning buckets 1200 (311.24) 0.118 (0.15) 53.78 (118.56) ? ? ? ?
2-11
27
2. SPECIFICATIONS SWARNING u The buckets with
this length, during left dipper slewing higher
than 1 m from ground, can interfere with the
cabin. For a safe use, consult the Dealer and ask
for left slewing limiter of the dipper
support. l Width with lateral cutter m Width
without lateral cutter ? Generic digging for
digging and sand loading operations, gravel,
clay, earth in general, etc.. The specific
weight of the material should not be higher than
1400 kg/m3. n Digging for light applications for
operations of digging,sand loading/unloading of
gravel, clay, earth in friabile and dry state,
ditch cleaning, etc.
2-12
28
2. SPECIFICATIONS
2.8 2.8.1
ENGINE SPECIFICATIONS SPECIFICATIONS
Model Model CX20B / 22B, CX27B CX20B / 22B, CX27B
Engine Model Engine Model 3TNV82A-SYB 3TNV82A-SYB
Type Type Vertical, 4-cycle water-cooled diesel engine Vertical, 4-cycle water-cooled diesel engine
No. of cylinders - Bore ? Stroke No. of cylinders - Bore ? Stroke 3 - 82 mm (3.23 in) ? 84 mm (3.31 in) 3 - 82 mm (3.23 in) ? 84 mm (3.31 in)
Total displacement Total displacement 1.330 liter (81 cuin) 1.330 liter (81 cuin)
Compression ratio Compression ratio 19.2 19.2
Rated output Rated output 15.9 kW (21.6 PS) at 2200 rpm 15.9 kW (21.6 PS) at 2200 rpm
Maximum torque Maximum torque 79.0 86.0 Nm (58.3 63.4 lbfft) at 1320 100 rpm 79.0 86.0 Nm (58.3 63.4 lbfft) at 1320 100 rpm
Low idling Low idling 1200 25 rpm 1200 25 rpm
High idling High idling 2375 25 rpm 2375 25 rpm
Fuel consumption rate Fuel consumption rate 242 10 g / kWh (178 7 g / PSh) 242 10 g / kWh (178 7 g / PSh)
Allowable tilting angles Allowable tilting angles Continuous 30 for all direction Continuous 30 for all direction
Rotating direction Rotating direction Counterclockwise as seen from flywheel side Counterclockwise as seen from flywheel side
Firing order Firing order 1-3-2-1 1-3-2-1
Stating fuel injection timing Automatic injection advance range Stating fuel injection timing Automatic injection advance range (FIT) (at 2.5 mm) b.T.D.C. 16.0 1 (FIR) b.T.D.C. 2.5 1 (FIT) (at 2.5 mm) b.T.D.C. 16.0 1 (FIR) b.T.D.C. 2.5 1
Fuel injection pressure Fuel injection pressure 19.6 MPa (2840 psi) 19.6 MPa (2840 psi)
Valve action Open Close
Valve action Intake valve b.T.D.C. 15 5 a.B.D.C. 45 5
Valve action Exhaust valve b.T.D.C. 56 5 a.B.D.C. 18 5
Valve clearance Intake valve 0.2 mm (0.008 in) in cold condition 0.2 mm (0.008 in) in cold condition
Valve clearance Exhaust valve 0.2 mm (0.008 in) in cold condition 0.2 mm (0.008 in) in cold condition
Thermostat action Thermostat action Start 71 1.5 C (160 3 F) / Full open 85 C (185 F) Start 71 1.5 C (160 3 F) / Full open 85 C (185 F)
Compression pressure Compression pressure 3.16 0.1 MPa (460 14 psi) at 250 rpm 3.16 0.1 MPa (460 14 psi) at 250 rpm
Lubrication oil pressure Lubrication oil pressure 0.392 MPa (57 psi) at 2200 rpm 0.392 MPa (57 psi) at 2200 rpm
Dimensions L ? W ? H Dimensions L ? W ? H 565 ? 494 ? 611 mm (22.2 ? 19.4 ? 24.1 in) 565 ? 494 ? 611 mm (22.2 ? 19.4 ? 24.1 in)
Dry weight Dry weight 128 kg (282 lb) 128 kg (282 lb)
Governor Governor Mechanical centrifugal governor (All speed type) Mechanical centrifugal governor (All speed type)
Fuel filtration Fuel filtration cartridge type paper filter cartridge type paper filter
Lubrication system Lubrication system Forced lubrication with trochoid pump Forced lubrication with trochoid pump
Cooling system Cooling system Liquid cooling / Radiator Liquid cooling / Radiator
Starter capacity Starter capacity 12 V ? 1.7 kW 12 V ? 1.7 kW
Generator capacity Generator capacity 12 V ? 40 A 12 V ? 40 A
Starting aid Starting aid Air heater (12 V - 400 W) Air heater (12 V - 400 W)
Cooling water capacity Max / Engine Cooling water capacity Max / Engine 4.0 / 1.8 liter (1.06 / 0.48 gal) 4.0 / 1.8 liter (1.06 / 0.48 gal)
Engine oil volume Max / Effective Engine oil volume Max / Effective 5.5 / 1.9 liter (1.45 / 0.50 gal) 5.5 / 1.9 liter (1.45 / 0.50 gal)
2-13
29
2. SPECIFICATIONS 2.8.2 ENGINE PERFORMANCE CURVE
CX20B / 22B, CX27B Model 3TNV82A-SYB Rated
Output 15.9 kW / 2200 min-1 (21.6 PS / 2200 rpm)
6 Sd 4
Sd
2
0 600
GT
(Ibf ft)
N m (74) 100
500
400 GT
T
T
(59) 80
300
(44) 60
200
(30) 40
100
(15) 20
PS
15 (20)
0 g/PSh g/kWh
PS
12.5 (17) 10 (14) 7.5 (10) 5 (7)
F
(257) 350
(239) 325
(221) 300
(202) 275
(184) 250
(165) 225
(147) 200
2.5 (3) ps
F
0 KW
800
1000 1200
2600
1400
1600
1800
2000
2200
2400
min 1rpm
F
X P X ?
Fuel consumption volume
? X 1000 242
X 15.9 X ?

0.835 X 1000
4.61 ? F. Fuel consumption rate (g/kWh) P.
Shaft output (kW) ?? Specific gravity
T. Shaft torque F. Fuel consumption rate
PS.Power output GT. Exhaust temperature
?. Standard load factory (0.60 0.70)
Fuel consumption in normal operation 2.77 3.23
L/h Sd. Smoke Bosch (load factor (0.60 0.70)
2-14
30
3. ATTACHMENT DIMENSIONS
3
TABLE OF CONTENTS 3.1 BOOM ...................
..................................................
..........................................
3-3 3.1.1 BOOM DIMENSIONAL DRAWINGS
..................................................
........... 3-3 3.1.2 BOOM MAINTENANCE STANDARDS
..................................................
....... 3-4 3.2 ARM ...........................
..................................................
................................... 3-10 3.2.1
ARM DIMENSIONAL DRAWINGS .........................
..................................... 3-10 3.2.2
ARM MAINTENANCE STANDARDS ........................
.................................. 3-12 3.3
BUCKET ...........................................
..................................................
............. 3-17 3.3.1 BUCKET DIMENSIONAL
DRAWINGS .........................................
.............. 3-17 3.3.2 DETAIL DIMENSIONAL
DRAWINGS OF LUG SECTION ..........................
3-18 3.4 DOZER .................................
..................................................
......................... 3-19 3.4.1 DOZER
DIMENSIONAL DRAWINGS .............................
............................ 3-19 3.4.2 DOZER
MAINTENANCE STANDARDS ...........................
.......................... 3-20 3.5 SWING
..................................................
..................................................
........ 3-23 3.5.1 SWING BRACKET DIMENSIONAL
DRAWINGS ........................................
3-23 3.5.2 SWING PORTION MAINTENANCE STANDARDS
.................................... 3-24
31
3. ATTACHMENT DIMENSIONS
3-1
32
3. ATTACHMENT DIMENSIONS
3.1 3.1.1
BOOM BOOM DIMENSIONAL DRAWINGS
Fig. 3-1 Boom Dimensional Drawings Table 3-1
Unit mm(ft-in)
No. NAME DIMENSIONS DIMENSIONS
No. NAME CX20B / 22B CX27B
A Boom length 1880 (62.02") 2150 (70.65
B Distance between pins of boss R1040 (34.94") R1030.5 (34.57")
C Distance between pins of bracket R1028.5 (34.49") R1084.5 (36.70")
D Height of boom cylinder rod pin 277 (10.91") 262 (10.31")
E Height of Dipper cylinder (head side) pin 678.5 (22.71") 640 (21.20")
F G H J K Boom width 160 (6.30") ?
F G H J K Inner width of bracket for boom cylinder (rod side) mount- ing 56 (2.20") ?
F G H J K Boom end inner width 125 (4.92") ?
F G H J K Boom end outer width 195 (7.78") ?
F G H J K Inner width of bracket for dipper cylinder (head side) 51 (2.01") ø56 (2.20)
d1 Boom pin dia. Bushing outer dia. ø40 (1.57") ø50 (1.97") ?
d2 Boom cylinder (rod side) pin dia. ø40 (1.75") ?
d3 Pin dia. of dipper end ø40 (1.75") ?
d4 Dipper cylinder (head side) pin dia. ø35 (1.38") ø40 (1.57)
3-3
33
3. ATTACHMENT DIMENSIONS 3.1.2 BOOM MAINTENANCE
STANDARDS (1) Clearance of pin and bushing on
boom section

• Fig. 3-2 Clearance of pin and bushing on boom
  section Table 3-2
• CX20B / 22B

Unit mm (in)
Pos. Item Standard dimensions Standard dimensions Standard dimensions Clearance Clearance Clearance Remedy
Pos. Item Pin dia. Tolerance on pin dia. Tolerance on bushing bore dia. Standard value Standard value for repair Serviceabi lity limit Remedy
A Boom ø40 (1.5748) 0.02 0.05 (-0.0008) (-0.0020) 0.06 0.01 (0.0024) (0.0004) 0.03 0.11 (0.0012 0.0043) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
B Boom cylinder (Head side) ø40 (1.5748) 0.02 0.08 (-0.0008) (-0.0031) 0.18 0.05 (0.0071) (0.0020) 0.07 0.26 (0.0028 0.0102) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
C Boom cylinder (Rod side) ø40 (1.5748) 0.02 0.05 (-0.0008) (-0.0020) 0.18 0.05 (0.0071) (0.0020) 0.09 0.23 (0.0028 0.0091) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
D Dipper cylinder (Head side) ø35 (1.3780) 0.02 0.05 (-0.0008) (-0.0020) 0.18 0.05 (0.0071) (0.0020) 0.09 0.23 (0.0028 0.0091) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin

• (Note)
• The tolerance for bushing inside diameter means
  the dimension after fitting of it into place.
• The part number for pins may be changed owing to
  improvement, use them only for reference.

3-4
34
3. ATTACHMENT DIMENSIONS
Table 3-3

• CX27B

Unit mm (in)
Pos. Item Standard dimensions Standard dimensions Standard dimensions Clearance Clearance Clearance Remedy
Pos. Item Pin dia. Tolerance on pin dia. Tolerance on bushing bore dia. Standard value Standard value for repair Serviceabi lity limit Remedy
A Boom foot ø40 (1.5748) 0.02 0.05 (-0.0008) (-0.0020) 0.06 0.01 (0.0024) (0.0004) 0.03 0.11 (0.0012 0.0043) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
B Boom cylinder (Head side) ø40 (1.5748) 0.02 0.08 (-0.0008) (-0.0031) 0.18 0.05 (0.0071) (0.0020) 0.07 0.26 (0.0028 0.0102) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
C Boom cylinder (Rod side) ø40 (1.5748) 0.02 0.05 (-0.0008) (-0.0020) 0.18 0.05 (0.0071) (0.0020) 0.09 0.23 (0.0028 0.0091) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin
D Dipper cylinder (Head side) ø40 (1.5748) 0.02 0.05 (-0.0008) (-0.0020) 0.18 0.05 (0.0071) (0.0020) 0.09 0.23 (0.0028 0.0091) 0.7 (0.028) 1.0 (0.039) Replace bushing or pin

• (Note)
• The tolerance for bushing inside diameter means
  the dimension after fitting of it into place.
• The part number for pins may be changed owing to
  improvement, use them only for reference.

3-5
35
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3. ATTACHMENT DIMENSIONS (2) Clearance in thrust
direction on boom and cylinder installation
section
D
D
C
C
A
B
A B
PL 1 L 1
A-A
D-D
C-C
B-B
Fig. 3-3 Clearance in thrust direction on boom
section
3-6
37
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