wsm B2420 Instruction manual

B2420
WORKSHOP MANUAL
TRACTOR
KiSC issued 06, 2012 A

TO THE READER
This Workshop Manual tells the servicing personnel about the mechanism, servicing and
maintenance of the B2420. It contains 4 parts: "Information", "General", "Mechanism" and
"Servicing".
QInformation
This section contains information below.
• Safety First
• Safety Decal
• Specification
• Dimension
QGeneral
This section contains information below.
• Engine Identification
• Model Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
• Special Tools
QMechanism
This section contains information on the structure and the function of the unit. Before you continue
with the subsequent sections, make sure that you read this section.
Refer to the latest version of Workshop Manual (Code No. 9Y021-01870 / 9Y021-18200) for the
diesel engine / tractor mechanism that this workshop manual does not include.
QServicing
This section contains information below.
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing
All illustrations, photographs and specifications contained in this manual are of the newest
information available at the time of publication.
KUBOTA reserves the right to change all information at any time without notice.
February, 2010
© KUBOTA Corporation 2010
KiSC issued 06, 2012 A

I INFORMATION
KiSC issued 06, 2012 A

CONTENTS
1. SAFETY FIRST .............................................................................................................................. I-1
2. SAFETY DECALS .......................................................................................................................... I-4
3. SPECIFICATIONS.......................................................................................................................... I-6
4. TRAVELING SPEEDS.................................................................................................................... I-7
5. DIMENSIONS ................................................................................................................................. I-8
INFORMATION
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-1
1. SAFETY FIRST
WSM000001INI0001US1
BEFORE YOU START SERVICE
• Read all instructions and safety instructions in this
manual and on your machine safety decals.
• Clean the work area and machine.
• Park the machine on a stable and level ground, and
set the parking brake.
• Lower the implement to the ground.
• Stop the engine, then remove the key.
• Disconnect the battery negative cable.
• Hang a "DO NOT OPERATE" tag in the operator
station.
WSM000001INI0010US1
START SAFELY
• Do not do the procedures below when you start the
engine.
– short across starter terminals
– bypass the safety start switch
• Do not alter or remove any part of machine safety
system.
• Before you start the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
• Do not start the engine when you stay on the ground.
Start the engine only from operator's seat.
WSM000001INI0015US0
SAFETY FIRST
• This symbol, the industry's "Safety Alert Symbol", is used throughout this manual and on labels on the
machine itself to warn of the possibility of personal injury. Read these instructions carefully.
• It is essential that you read the instructions and safety regulations before you attempt to repair or use
this unit.
DANGER
• Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
• Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
• Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
IMPORTANT
• Indicates that equipment or property damage could result if instructions are not followed.
NOTE
• Gives helpful information.
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-2
OPERATE SAFELY
• Do not use the machine after you consume alcohol
or medication or when you are tired.
• Put on applicable clothing and safety equipment.
• Use applicable tools only. Do not use alternative
tools or parts.
• When 2 or more persons do servicing, make sure
that you do it safely.
• Do not operate below the machine that only a jack
holds. Always use a safety stand to hold the
machine.
• Do not touch the hot parts or parts that turn when the
engine operates.
• Do not remove the radiator cap when the engine
operates, or immediately after it stops. If not, hot
water can spout out from the radiator. Only remove
the radiator cap when it is at a sufficiently low
temperature to touch with bare hands. Slowly loosen
the cap to release the pressure before you remove it
fully.
• Released fluid (fuel or hydraulic oil) under pressure
can cause damage to the skin and cause serious
injury. Release the pressure before you disconnect
hydraulic or fuel lines. Tighten all connections before
you apply the pressure.
• Do not open a fuel system under high pressure.
The fluid under high pressure that stays in fuel lines
can cause serious injury. Do not disconnect or repair
the fuel lines, sensors, or any other components
between the fuel pump and injectors on engines with
a common rail fuel system under high pressure.
• Put on an applicable ear protective device (earmuffs
or earplugs) to prevent injury against loud noises.
• Be careful about electric shock. The engine
generates a high voltage of more than DC100 V in
the ECU and is applied to the injector.
WSM000001INI0012US1
PREVENT A FIRE
• Fuel is very flammable and explosive under some
conditions. Do not smoke or let flames or sparks in
your work area.
• To prevent sparks from an accidental short circuit,
always disconnect the battery negative cable first
and connect it last.
• The battery gas can cause an explosion. Keep the
sparks and open flame away from the top of battery,
especially when you charge the battery.
• Make sure that you do not spill fuel on the engine.
WSM000001INI0005US1
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-3
KEEP A GOOD AIRFLOW IN THE WORK AREA
• If the engine is in operation, make sure that the area
has good airflow. Do not operate the engine in a
closed area. The exhaust gas contains poisonous
carbon monoxide.
WSM000001INI0006US1
DISCARD FLUIDS CORRECTLY
• Do not discard fluids on the ground, down the drain,
into a stream, pond, or lake. Obey related
environmental protection regulations when you
discard oil, fuel, coolant, electrolyte and other
dangerous waste.
WSM000001INI0007US1
PREVENT ACID BURNS
• Keep electrolyte away from your eyes, hands and
clothing. Sulfuric acid in battery electrolyte is
poisonous and it can burn your skin and clothing and
cause blindness. If you spill electrolyte on yourself,
clean yourself with water, and get medical aid
immediately.
WSM000001INI0008US1
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher ready at all
times.
• Keep the emergency contact telephone numbers
near your telephone at all times.
WSM000001INI0009US1
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-4
2. SAFETY DECALS
The following safety decals (pictorial safety labels) are installed on the machine. If a decal becomes
damaged, illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
WSM000001INI0014US0
9Y1210436INI0008US0
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-5
9Y1210436INI0009US0
CARE OF PICTORIAL SAFETY LABELS
1. Keep pictorial safety labels clean and free from obstructing material.
2. Clean pictorial safety labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing pictorial safety labels with new labels.
4. If a component with pictorial safety label(s) affixed is replace with new part, make sure new label(s) is (are)
attached in the same locations(s) as the replace component.
5. Mount new pictorial safety labels by applying on a clean dry surface and pressure any bubbles to outside edge.
9Y1210436INI0005US0
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-6
3. SPECIFICATIONS
NOTE
• *Manufacture's estimate
The company reserves the right to change the specifications without notice.
9Y1210436INI0001US0
Model B2420
PTO power* 14.3 kW (19.4 HP)*
Engine
Maker KUBOTA
Model D1105-D22I
Type E-TVCS, liquid-cooled, 3-cylinder diesel
Number of cylinder 3
Bore and stroke 78.0 × 78.4 mm (3.07 × 3.09 in.)
Total displacement 1123 cm3(68.53 cu.in.)
Engine gross power* 17.9 kW (24.0 HP)*
Rated revolution 2600 min-1 (rpm)
Maximum torque 70 N·m (52 Ibf·ft)
Battery 55B24L(S)-MF
Capacities
Fuel tank 26 L (6.9 U.S.gals, 5.7 Imp.gals)
Engine crankcase
(with filter) 3.1 L (3.3 U.S.qts, 2.7 Imp.qts)
Engine coolant 3.9 L (4.1 U.S.qts, 3.4 Imp.qts)
Transmission case 14 L (3.7 U.S.gals, 3.1 Imp.gals)
Dimensions
Overall length (with 3P) 2410 mm (94.88 in.)
Overall width 990 to 1331 mm (39.0 to 52.40 in.)
Overall height
(Top of
ROPS)
Rear mount
ROPS type 2300 to 2350 mm (90.56 to 92.51 in.)
Mid mount
ROPS type 2030 to 2055 mm (79.9 to 80.9 in.)
Wheel base 1563 mm (61.54 in.)
Minimum ground clearance 267 to 313 mm (10.6 to 12.3 in.)
Tread Front 797 to 815 mm (31.4 to 32.0 in.)
Rear 734 to 1088 mm (28.9 to 42.83 in.)
Weight 722 to 748 kg (1600 to 1640 lbs)
Clutch Dry single plate
Travelling
system
Tires Front 6-12
Rear 9.5-16
Steering Integral type power steering
Transmission Gear shift, 9 forward and 3 reverse
Brake Wet disk type
Min. turning radius
(with brake) 2.1 m (6.9 feet)
Hydraulic unit
Hydraulic control system Quarter inching valve
Pump capacity 3P: 16.6 L / min (4.39 U.S.gals / min, 3.65 Imp.gals / min)
Power steering: 9.8 L / min (2.6 U.S.gals / min., 2.2 Imp.gals / min)
3-point hitch SAE Category 1
Max. lift force
At lift points 615 kg (1360 lbs)
600 mm
behind lift
point
480 kg (1060 lbs)
PTO system Rear PTO
Shaft SAE 1-3/8, 6 splines
PTO / Engine
speed rpm 540 min-1 (rpm) at 2600 min-1 (rpm), 960 min-1 (rpm) at 2552 min-1 (rpm)
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-7
4. TRAVELING SPEEDS
NOTE
• The company reserves the right to change the specifications without notice.
9Y1210436INI0002US0
Model B2420
Tire size (Rear) 8-16 Farm 9.5-16 Farm 9.5-18 Farm
Range gear
shift lever
Main gear
shift lever km/h (mph) km/h (mph) km/h (mph)
Forward
1
Low
1 1.0 (0.62) 1.1 (0.68) 1.2 (0.75)
2 2 1.5 (0.93) 1.6 (0.99) 1.7 (1.1)
3 3 2.7 (1.7) 2.8 (1.7) 3.0 (1.9)
4
High
1 3.3 (2.0) 3.6 (2.2) 3.8 (2.4)
5 2 4.8 (3.0) 5.1 (3.2) 5.4 (3.4)
6 3 8.6 (5.3) 9.2 (5.7) 9.8 (6.1)
7
High
1 6.5 (4.0) 6.9 (4.3) 7.3 (4.5)
8 2 9.2 (5.7) 9.9 (6.2) 10.4 (6.46)
9 3 16.7 (10.4) 17.8 (11.1) 18.9 (11.7)
Reverse
1 Low 1 1.3 (0.81) 1.4 (0.87) 1.5 (0.93)
2 Middle 2 4.2 (2.6) 4.4 (2.7) 4.7 (2.9)
3 High 3 8.0 (5.0) 8.6 (5.3) 9.1 (5.7)
KiSC issued 06, 2012 A

INFORMATION
B2420, WSM
I-8
5. DIMENSIONS
9Y1210436INI0006US0
KiSC issued 06, 2012 A

G GENERAL
KiSC issued 06, 2012 A

CONTENTS
1. TRACTOR IDENTIFICATION....................................................................................................... G-1
[1] MODEL NAME AND SERIAL NUMBER ................................................................................ G-1
[2] CYLINDER NUMBER ............................................................................................................. G-1
2. GENERAL PRECAUTIONS.......................................................................................................... G-2
3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING .................................... G-3
[1] WIRING .................................................................................................................................. G-3
[2] BATTERY ............................................................................................................................... G-5
[3] FUSE ...................................................................................................................................... G-5
[4] CONNECTOR ........................................................................................................................ G-5
[5] HANDLING OF CIRCUIT TESTER ........................................................................................ G-6
[6] COLOR OF WIRING ..............................................................................................................G-7
4. LUBRICANTS, FUEL AND COOLANT......................................................................................... G-8
5. TIGHTENING TORQUES........................................................................................................... G-10
[1] GENERAL USE SCREWS, BOLTS AND NUTS .................................................................. G-10
[2] STUD BOLTS ....................................................................................................................... G-10
[3] METRIC SCREWS, BOLTS AND NUTS .............................................................................. G-11
[4] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF
THREADS ............................................................................................................................ G-11
[5] PLUGS ................................................................................................................................. G-11
6. MAINTENANCE CHECK LIST ................................................................................................... G-12
7. CHECK AND MAINTENANCE ................................................................................................... G-14
[1] DAILY CHECK...................................................................................................................... G-14
[2] CHECK POINTS OF INITIAL 50 HOURS ............................................................................ G-15
[3] CHECK POINTS OF EVERY 50 HOURS ............................................................................ G-17
[4] CHECK POINTS OF EVERY 100 HOURS .......................................................................... G-20
[5] CHECK POINTS OF EVERY 200 HOURS .......................................................................... G-24
[6] CHECK POINTS OF EVERY 400 HOURS .......................................................................... G-25
[7] CHECK POINT OF EVERY 800 HOURS ............................................................................. G-27
[8] CHECK POINT OF EVERY 1500 HOURS ........................................................................... G-27
[9] CHECK POINT OF EVERY 3000 HOURS ........................................................................... G-27
[10]CHECK POINT OF 1 YEAR ................................................................................................. G-27
[11]CHECK POINTS OF EVERY 2 YEARS ............................................................................... G-28
[12]OTHERS............................................................................................................................... G-31
8. SPECIAL TOOLS ....................................................................................................................... G-33
[1] SPECIAL TOOLS FOR ENGINE .......................................................................................... G-33
[2] SPECIAL TOOLS FOR TRACTOR ...................................................................................... G-39
9. TIRES ......................................................................................................................................... G-46
[1] TIRE PRESSURE................................................................................................................. G-46
[2] TREAD ADJUSTMENT ........................................................................................................ G-47
(1) Front Wheels .................................................................................................................. G-47
(2) Rear Wheels................................................................................................................... G-48
[3] TIRE LIQUID INJECTION .................................................................................................... G-49
10. IMPLEMENT LIMITATIONS ....................................................................................................... G-51
GENERAL
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-1
1. TRACTOR IDENTIFICATION
[1] MODEL NAME AND SERIAL NUMBER
When contacting your local KUBOTA distributor, always specify
engine serial number, tractor serial number, ROPS serial number
and hour meter reading.
9Y1210436GEG0028US0
[2] CYLINDER NUMBER
The cylinder numbers of KUBOTA diesel engine are designated
as shown in the figure.
The sequence of cylinder numbers is given as No.1, No.2 and
No.3 starting from the gear case side.
9Y1210436GEG0029US0
(1) Tractor Identification Plate
(2) Tractor Serial Number
(3) Engine Serial Number
(4) Hour Meter
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-2
2. GENERAL PRECAUTIONS
• When you disassemble, carefully put the parts in a clean area
to make it easy to find the parts. You must install the screws,
bolts and nuts in their initial position to prevent the reassembly
errors.
• When it is necessary to use special tools, use KUBOTA special
tools. Refer to the drawings when you make special tools that
you do not use frequently.
• Before you disassemble or repair machine, make sure that you
always disconnect the ground cable from the battery first.
• Remove oil and dirt from parts before you measure.
• Use only KUBOTA genuine parts for replacement to keep the
machine performance and to make sure of safety.
• You must replace the gaskets and O-rings when you assemble
again. Apply grease (1) to new O-rings or oil seals before you
assemble.
• When you assemble the external or internal snap rings, make
sure that the sharp edge (3) faces against the direction from
which force (2) is applied.
• When inserting spring pins, their splits must face the direction
from which a force is applied. See the figure left side.
• To prevent damage to the hydraulic system, use only specified
fluid or equivalent.
WSM000001GEG0092US0
(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement
(A) External Snap Ring
(B) Internal Snap Ring
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-3
3. HANDLING PRECAUTIONS FOR ELECTRICAL
PARTS AND WIRING
To ensure safety and prevent damage to the machine and
surrounding equipment, heed the following precautions in handling
electrical parts and wiring.
IMPORTANT
• Check electrical wiring for damage and loosened
connection every year. To this end, educate the customer
to do his or her own check and at the same time
recommend the dealer to perform periodic check for a fee.
• Do not attempt to modify or remodel any electrical parts
and wiring.
• When removing the battery cables, disconnect the negative
cable first. When installing the battery cables, connect the
positive cable first.
WSM000001GEG0062US1
[1] WIRING
• Securely tighten wiring terminals.
WSM000001GEG0063US1
• Do not let wiring contact dangerous part.
WSM000001GEG0064US1
• Repair or change torn or aged wiring immediately.
WSM000001GEG0065US1
(1) Negative Terminal (2) Positive Terminal
(1) Correct
(Securely Tighten)
(2) Incorrect
(Loosening Leads to Faulty Contact)
(1) Dangerous Part (Sharp Edge)
(2) Wiring (Incorrect)
(3) Wiring (Correct)
(4) Dangerous Part
(1) Aged
(2) Torn
(3) Insulating Vinyl Tape
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-4
• Securely insert grommet.
WSM000001GEG0066US1
• Securely clamp, being careful not to damage wiring.
WSM000001GEG0067US1
• Clamp wiring so that there is no twist, unnecessary sag, or
excessive tension, except for movable part, where sag be
required.
WSM000001GEG0068US1
• In installing a part, take care not to get wiring caught by it.
WSM000001GEG0069US1
• After installing wiring, check protection of terminals and
clamped condition of wiring, only connect battery.
WSM000001GEG0070US1
(1) Grommet (A) Correct
(B) Incorrect
(1) Clamp
(Wind Clamp Spirally)
(2) Wire Harness
(3) Clamp
(4) Welding Dent
(1) Wiring
(2) Clamp
(A) Correct
(B) Incorrect
(1) Wiring (A) Incorrect
(1) Cover
(Securely Install Cover)
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-5
[2] BATTERY
• Take care not to confuse positive and negative terminal posts.
• When removing battery cables, disconnect negative cable first.
When installing battery cables, check for polarity and connect
positive cable first.
• Do not install any battery with capacity other than is specified
(Ah).
• After connecting cables to battery terminal posts, apply high
temperature grease to them and securely install terminal covers
on them.
• Do not allow dirt and dust to collect on battery.
CAUTION
• Take care not to let battery liquid spill on your skin and
clothes. If contaminated, wash it off with water
immediately.
• Before recharging the battery, remove it from the machine.
• Before recharging, remove cell caps.
• Do recharging in a well-ventilated place where there is no
open flame nearby, as hydrogen gas and oxygen are
formed.
WSM000001GEG0071US1
[3] FUSE
• Use fuses with specified capacity.
Neither too large or small capacity fuse is acceptable.
• Never use steel or copper wire in place of fuse.
• Do not install working light, radio set, etc. on machine which is
not provided with reserve power supply.
• Do not install accessories if fuse capacity of reserve power
supply is exceeded.
WSM000001GEG0072US1
[4] CONNECTOR
• For connector with lock, push lock to separate.
WSM000001GEG0073US1
• In separating connectors, do not pull wire harnesses.
• Hold connector bodies to separate.
WSM000001GEG0074US1
(1) Fuse
(2) Fusible Link
(3) Slow Blow Fuse
(A) Push
(A) Correct (B) Incorrect
KiSC issued 06, 2012 A

GENERAL
B2420, WSM
G-6
• Use sandpaper to remove rust from terminals.
• Repair deformed terminal. Make certain there is no terminal
being exposed or displaced.
WSM000001GEG0075US1
• Make certain that there is no female connector being too open.
WSM000001GEG0076US1
• Make certain plastic cover is large enough to cover whole
connector.
WSM000001GEG0077US1
[5] HANDLING OF CIRCUIT TESTER
• Use tester correctly following manual provided with tester.
• Check for polarity and range.
WSM000001GEG0078US1
(1) Exposed Terminal
(2) Deformed Terminal
(3) Sandpaper
(4) Rust
(A) Correct (B) Incorrect
(1) Cover (A) Correct
(B) Incorrect
KiSC issued 06, 2012 A