Kubota B2320 Instruction manual

B2320,B2620,B2920
WORKSHOP MANUAL
TRACTOR
KiSC issued 05, 2011 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of B2320, B2620 and B2920.
It is divided into three parts, “General”, “Mechanism” and “Servicing”.
QGeneral
Information on the tractor identification, the general precautions, maintenance check
list, check and maintenance and special tools are described.
QMechanism
Information on the construction and function are included. This part should be
understood before proceeding with troubleshooting, disassembling and servicing.
Refer to Diesel Engine / Tractor Mechanism Workshop Manual (Code No. 9Y021-
01874 / 9Y021-18201) for the one which has not been described to this workshop
manual.
QServicing
Information on the troubleshooting, servicing specification lists, tightening torque,
checking and adjusting, disassembling and assembling, and servicing which cover
procedures, precautions, factory specifications and allowable limits.
All information illustrations and specifications contained in this manual are based on
the latest product information available at the time of publication.
The right is reserved to make changes in all information at any time without notice.
Due to covering many models of this manual, information or picture being used have
not been specified as one model.
November 2007
© KUBOTA Corporation 2007
KiSC issued 05, 2011 A
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1
B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
BEFORE SERVICING AND REPAIRING
• 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 firm and level ground, and set
the parking brake.
• Lower the implement to the ground.
• Stop the engine, and remove the key.
• Disconnect the battery negative cable.
• Hang a “DO NOT OPERATE” tag in operator
station.
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.
QIMPORTANT : Indicates that equipment or property damage could result if instructions are not
followed.
QNOTE : Gives helpful information.
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B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.
• Do not alter or remove any part of machine safety
system.
• Before starting the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
• Never start the engine while standing on ground.
Start the engine only from operator’s seat.
SAFETY WORKING
• Do not work on the machine while under the influence
of alcohol, medication, or other substances or while
fatigued.
• Wear close fitting clothing and safety equipment
appropriate to the job.
• Use tools appropriate to the work. Makeshift tools,
parts, and procedures are not recommended.
• When servicing is performed together by two or more
persons, take care to perform all work safely.
• Do not work under the machine that is supported
solely by a jack. Always support the machine by
safety stands.
• Do not touch the rotating or hot parts while the engine
is running.
• Never remove the radiator cap while the engine is
running, or immediately after stopping. Otherwise, hot
water will spout out from radiator. Only remove
radiator cap when cool enough to touch with bare
hands. Slowly loosen the cap to first stop to relieve
pressure before removing completely.
• Escaping fluid (fuel or hydraulic oil) under pressure
can penetrate the skin causing serious injury. Relieve
pressure before disconnecting hydraulic or fuel lines.
Tighten all connections before applying pressure.
• Do not open high-pressure fuel system.
High-pressure fluid remaining in fuel lines can cause
serious injury. Do not disconnect or attempt repair
fuel lines, sensors, or any other components between
the high-pressure fuel pump and injectors on engines
with high pressure common rail fuel system.
• High voltage exceeding 100 V is generated in the
ECU, and is applied to the injector.
Pay sufficient caution to electric shock when
performing work activities.
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B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
AVOID FIRES
• Fuel is extremely flammable and explosive under
certain conditions. Do not smoke or allow flames or
sparks in your working area.
• To avoid sparks from an accidental short circuit,
always disconnect the battery negative cable first and
connect it last.
• Battery gas can explode. Keep sparks and open
flame away from the top of battery, especially when
charging the battery.
• Make sure that no fuel has been spilled on the engine.
VENTILATE WORK AREA
• If the engine must be running to do some work, make
sure the area is well ventilated. Never run the engine
in a closed area. The exhaust gas contains poisonous
carbon monoxide.
PREVENT ACID BURNS
• Sulfuric acid in battery electrolyte is poisonous. It is
strong enough to burn skin, clothing and cause
blindness if splashed into eyes. Keep electrolyte
away from eyes, hands and clothing. If you spill
electrolyte on yourself, flush with water, and get
medical attention immediately.
DISPOSE OF FLUIDS PROPERLY
• Do not pour fluids into the ground, down a drain, or
into a stream, pond, or lake. Observe relevant
environmental protection regulations when disposing
of oil, fuel, coolant, electrolyte and other harmful
waste.
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B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher handy at all
times.
• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.
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5
B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
The following safety decals 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.
SAFETY DECALS
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6
B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
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B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
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B2320, B2620, B2920, WSM SAFETY INSTRUCTIONS
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9
B2320, B2620, B2920, WSM SPECIFICATIONS
SPECIFICATIONS
W10281170
Model B2320DT B2320HSD B2620HSD B2920HSD
PTO power 13.4 kW (18.0 HP)* 12.7 kW (17.0 HP)* 14.2 kW (19.0 HP)* 15.7 kW (21.0 HP)*
Engine
Maker KUBOTA
Model D1005-E3-D22 D1105-E3-D22 D1305-E3-D22
Type E-TVCS, liquid-cooled, 3-cylinder diesel
Number of cylinders 3
Bore and stroke 76 x 73.6 mm (3.0 x 2.9 in.) 78 x 78.4 mm
(3.1 x 3.1 in.)
78 x 88 mm
(3.1 x 3.5 in.)
Total displacement 1001 cm3(61.1 cu.in.) 1123 cm3(68.5 cu.in.) 1261 cm3(77.0 cu.in.)
Engine gross power 17.2 kW (23.0 HP)* 19.4 kW (26.0 HP)* 21.6 kW (29.0 HP)*
Rated revolution 2800 min-1 (rpm)
Maximum torque 60 N·m (40 Ibf·ft) 71 N·m (52 Ibf·ft) 78 N·m (58 Ibf·ft)
Battery 12 V, RC : 79 min, CCA : 433 A
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) 3.5 L (3.7 U.S.qts, 3.1 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) 15 L (4.0 U.S.gals, 3.3 Imp.gals)
Dimensions
Overall length
(without 3P) 2385 mm (93.9 in.) 2415 mm (95.1 in.)
Overall width 1145 mm (45.1 in.) 1245 mm (49.0 in.)
Overall height
(with ROPS) 2130 mm (83.9 in.) 2160 mm (85.0 in.)
Wheel base 1563 mm (61.5 in.)
Minimum ground
clearance 305 mm (12.0 in.) 325 mm (12.8 in.)
Tread Front 800 mm (31.5 in.) 815 mm (32.1 in.)
Rear 900 mm (35.5 in.) 950 mm (37.4 in.)
Weight (with ROPS) 650 kg (1433 lbs) 670 kg (1477 lbs) 705 kg (1554 lbs)
Clutch Dry single plate
Travelling
system
Tires Front 6 - 12 7 - 12
Rear 9.5 - 16 11.2 - 16
Steering Integral type power steering
Transmission Gear shift, 9 forward and
3 reverse Main-hydrostatic transmission, 3 range gear shift (3 forward, 3 reverse)
Brake Wet disk type
Min. turning radius
(with brake) 2.1 m (6.9 feet)
KiSC issued 05, 2011 A

10
B2320, B2620, B2920, WSM SPECIFICATIONS
Note : * Manufacture’s estimate
The company reserves the right to change the specifications without notice.
W10303710
Model B2320DT B2320HSD B2620HSD B2920HSD
Hydraulic
system
Hydraulic control
system Quarter inching valve
Pump capacity 3P : 17.9L / min (4.7 U.S.gals / min, 3.9 Imp.gals min)
Power steering : 13.5 L / min (3.6 U.S.gals / min., 3.0 Imp.gals / min)
Three point hitch SAE Category 1
Max. lift
force
At lift points 615 kg (1356 lbs)
24 in.
behind lift
points
480 kg (1058 lbs)
PTO system
Rear
PTO
Shaft SAE 1-3/8, 6 splines
PTO /
Engine
speed rpm
540 min-1 (rpm) at 2876 min-1 (rpm), 960 min-1 (rpm) at 2722 min-1 (rpm)
Mid
PTO
Shaft U.S.A. No.5 (KUBOTA 10-tooth) involute spline
PTO /
Engine
speed rpm
2500 min-1 (rpm) at 2750 min-1 (rpm)
KiSC issued 05, 2011 A

11
B2320, B2620, B2920, WSM TRAVELLING SPEEDS
TRAVELLING SPEEDS
HST Model
W10323900
Manual Transmission Model
Note : The company reserves the right to change the specifications without notice.
W10330350
Model B2320 B2620 / B2920
Tire size (Rear) 9.5 -16 Farm 33 x 12.5 -15 Turf 11.2 -16 Farm 33 x 12.5 -15 Turf
Range gear
shift lever km/h mph km/h mph km/h mph km/h mph
Forward
Low 0 to 5.6 0 to 3.5 0 to 5.6 0 to 3.5 0 to 6.0 0 to 3.7 0 to 5.6 0 to 3.5
Middle 0 to 9.3 0 to 5.8 0 to 9.3 0 to 5.8 0 to 9.9 0 to 6.2 0 to 9.3 0 to 5.8
High 0 to 18.9 0 to 11.7 0 to 18.9 0 to 11.7 0 to 20.2 0 to 12.6 0 to 18.9 0 to 11.7
Reverse
Low 0 to 4.5 0 to 2.8 0 to 4.5 0 to 2.8 0 to 4.8 0 to 3.0 0 to 4.5 0 to 2.8
Middle 0 to 7.4 0 to 4.6 0 to 7.4 0 to 4.6 0 to 7.9 0 to 4.9 0 to 7.4 0 to 4.6
High 0 to 15.1 0 to 9.4 0 to 15.1 0 to 9.4 0 to 16.1 0 to 10.0 0 to 15.1 0 to 9.4
Model B2320
Tire size (Rear) 9.5 -16 Farm 33 x 12.5 - 15 Turf
Range gear
shift lever
Main gear
shift lever km/h mph km/h mph
Forward
1
Low
1 1.1 0.7 1.1 0.7
2 2 1.6 1.0 1.6 1.0
3 3 2.9 1.8 2.9 1.8
4
Middle
1 3.6 2.2 3.6 2.2
5 2 5.1 3.2 5.1 3.2
6 3 9.3 5.8 9.3 5.8
7
High
1 7.0 4.4 7.0 4.4
8 2 9.9 6.2 9.9 6.2
9 3 18.0 11.2 18.0 11.2
Reverse
1 Low R 1.4 0.9 1.4 0.9
2 Middle R 4.5 2.8 4.5 2.8
3 High R 8.7 5.4 8.7 5.4
KiSC issued 05, 2011 A

12
B2320, B2620, B2920, WSM DIMENSIONS
DIMENSIONS
KiSC issued 05, 2011 A

G GENERAL
KiSC issued 05, 2011 A

CONTENTS
GENERAL
1. TRACTOR IDENTIFICATION ......................................................................... G-1
[1] MODEL NAME AND SERIAL NUMBER ................................................ G-1
[2] CYLINDER NUMBER ............................................................................... G-2
2. GENERAL PRECAUTIONS ............................................................................ G-3
3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING .. G-4
[1] WIRING...................................................................................................... G-4
[2] BATTERY................................................................................................... G-6
[3] FUSE.......................................................................................................... G-6
[4] CONNECTOR ............................................................................................ G-7
[5] HANDLING OF CIRCUIT TESTER......................................................... G-8
4. LUBRICANTS, FUEL AND COOLANT ......................................................... G-9
5. TIGHTENING TORQUES ............................................................................. G-11
[1] GENERAL USE SCREWS, BOLTS AND NUTS................................. G-11
[2] STUD BOLTS.......................................................................................... G-11
[3] METRIC SCREWS, BOLTS AND NUTS ............................................. G-12
[4] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC
OR UNF THREADS ............................................................................... G-12
[5] PLUGS ..................................................................................................... G-12
6. MAINTENANCE CHECK LIST ..................................................................... G-13
7. CHECK AND MAINTENANCE ..................................................................... G-15
[1] DAILY CHECK ........................................................................................ G-15
[2] CHECK POINTS OF INITIAL 50 HOURS ........................................... G-16
[3] CHECK POINTS OF EVERY 50 HOURS ........................................... G-19
[4] CHECK POINTS OF EVERY 100 HOURS ......................................... G-22
[5] CHECK POINTS OF EVERY 200 HOURS ......................................... G-26
[6] CHECK POINTS OF EVERY 400 HOURS ......................................... G-27
[7] CHECK POINTS OF EVERY 800 HOURS ......................................... G-28
[8] CHECK POINTS OF EVERY 1500 HOURS ....................................... G-28
[9] CHECK POINTS OF EVERY 3000 HOURS ....................................... G-28
[10]CHECK POINTS OF 1 YEAR .............................................................. G-28
[11]CHECK POINTS OF EVERY 2 YEARS.............................................. G-29
[12]OTHERS .................................................................................................. G-32
8. SPECIAL TOOLS.......................................................................................... G-34
[1] SPECIAL TOOLS FOR ENGINE .......................................................... G-34
[2] SPECIAL TOOLS FOR TRACTOR....................................................... G-40
9. TIRES............................................................................................................. G-46
[1] TIRE PRESSURE ................................................................................... G-46
[2] TREAD ADJUSTMENT........................................................................... G-47
(1) Front Wheels...................................................................................... G-47
(2) Rear Wheels ...................................................................................... G-49
[3] TIRE LIQUIE INJECTION ...................................................................... G-51
10. IMPLEMENT LIMITATIONS.......................................................................... G-53
KiSC issued 05, 2011 A

G-1
B2320, B2620, B2920, WSM G GENERAL
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.
W1010593
(1) Tractor Identification Plate
(2) Tractor Serial Number
(3) Engine Serial Number
(4) ROPS Identification Plate
(5) Hour Meter
KiSC issued 05, 2011 A

G-2
B2320, B2620, B2920, WSM G GENERAL
[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.
W1011077
KiSC issued 05, 2011 A

G-3
B2320, B2620, B2920, WSM G GENERAL
2. GENERAL PRECAUTIONS
• During disassembly, carefully arrange removed parts in a clean
area to prevent confusion later. Screws, bolts and nuts should be
installed in their original position to prevent reassembly errors.
• When special tools are required, use KUBOTA genuine special
tools. Special tools which are not frequently used should be
made according to the drawings provided.
• Before disassembling or servicing electrical wires, always
disconnect the ground cable from the battery first.
• Remove oil and dirt from parts before measuring.
• Use only KUBOTA genuine parts for parts replacement to
maintain machine performance and to assure safety.
• Gaskets and O-rings must be replaced during reassembly. Apply
grease to new O-rings or oil seals before assembling. See the
figure left side.
• When reassembling external snap rings or internal snap rings,
they must be positioned so that sharp edge faces against the
direction from which a force is applied. See the figure left side.
• 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.
W1010787
(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement
(A) External Snap Ring
(B) Internal Snap Ring
KiSC issued 05, 2011 A

G-4
B2320, B2620, B2920, WSM G GENERAL
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.
IMPORTANTQ
• 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.
W1011102
[1] WIRING
• Securely tighten wiring terminals.
W1011256
• Do not let wiring contact dangerous part.
W1011360
• Repair or change torn or aged wiring immediately.
W1011482
(1) Negative Terminal (2) Positive Terminal
(1) Correct (Securely Tighten) (2) Incorrect (Loosening Leads to Faulty
Contact)
(1) Dangerous Part
(2) Wiring (Incorrect)
(3) Wiring (Correct)
(4) Dangerous Part
(1) Aged
(2) Torn
(3) Insulating Vinyl Tape
KiSC issued 05, 2011 A