Kubota B2301, B2601 Service Manual

B2301,B2601

WORKSHOP MANUAL

TRACTOR

KiSC issued 11, 2014 A

TO THE READER

This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the B2301 and B2601. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing".

 Information

This section primarily contains information below.

• Safety First

• Safety Decal

• Specifications

• Dimensions

 General

This section primarily contains information below.

• Engine Identification

• Model Identification

• General Precautions

• Maintenance Check List

• Check and Maintenance

• Special Tools

 Mechanism

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.

 Servicing

This section primarily 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.

Since this manual includes many models, information or illustrations and photographs can show more than one model.

November, 2014

KiSC issued 11, 2014 A

I INFORMATION

KiSC issued 11, 2014 A

CONTENTS

1. SAFETY FIRST .............................................................................................................................. I-1

2. SAFETY DECALS .......................................................................................................................... I-4

3. SPECIFICATIONS.......................................................................................................................... I-7

4. TRAVELING SPEEDS.................................................................................................................... I-8

5. DIMENSIONS ................................................................................................................................. I-9

INFORMATION

KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-1

1. SAFETY FIRST

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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.

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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.

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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 try 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 11, 2014 A

INFORMATION

B2301, B2601, 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.

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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.

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KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, 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.

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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.

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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.

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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.

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KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-4

2. SAFETY DECALS

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.

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KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-5

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KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-6

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CARE OF DANGER, WARNING AND CAUTION LABELS

1. Keep danger, warning and caution labels clean and free from obstructing material.

2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.

3. Replace damaged or missing danger, warning and caution labels with new labels.

4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new label(s) is (are) attached in the same location(s) as the replace component.

5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to outside edge.

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KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-7

3. SPECIFICATIONS

NOTE

• * Manufacturer's estimate The company reserves the right to change the specifications without notice.

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Model B2301 B2601

PTO power *1 17.5 kW (13.0 HP) 19.5 kW (14.5 HP)

Engine

Maker KUBOTA

Model D1005-E4-D32 D1105-E4-D32

Type E-TVCS. Liquid-cooled, 3-cylinder diesel

Number of cylinders 3

Bore and stroke 76 × 73.6 mm (3.0 × 2.9 in.) 78 × 78.4 mm (3.1 × 3.1 in.)

Total displacement 1001 cc (61.1 cu.in.) 1123 cc (68.5 cu.in.)

Engine gross power *1 22 kW (16.4 HP) 25.5 kW (19.0 HP)

Rated revolution 2800 min

-1

(rpm)

Low idling revolution 1000 to 1100 min

-1

(rpm)

Maximum torque 60 N·m (6.1 kgf· m, 44 lbf·ft) 71 N·m (7.2 kgf·m, 52 lbf·ft)

Battery 12 V, RC: 80 min, CCD: 430 A

Capacities

Fuel tank 23 L (6.1 U.S.gals, 5.1 Imp.gals)

Engine crankcase (with filter) 3.1 L (3.3 U.S.qts, 2.7 Imp.qts)

Engine coolant 3.8 L (4.0 U.S.qts, 3.3 Imp.qts)

Transmission case 15 L (4.0 U.S.gals, 3.3 Imp.gals)

Dimensions

Overall length (without 3P) 2380 mm (93.7 in.) 2410 mm (94.9 in.)

Overall width (min. tread) 1150 mm (45.3 in.) 1245 mm (49.0 in.)

Overall height 2130 mm (83.9 in.) 2160 mm (85.0 in.)

Wheel base 1560 mm (61.4 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 710 kg (1566 lbs) 740 kg (1632 lbs)

Clutch Not applicable

Traveling system

Tires

Front 6-12 7-12

Rear 9.5-16 11.2-16

Steering Hydraulic type power steering

Transmission HST (3 range)

Brake Wet disk type

Minimum turning radius (with brake)

2.1 m (6.9 feet)

Hydraulic unit

Hydraulic control system Position Control Valve

Pump capacity 31.4 L/min (8.3 gals/min)

3-point hitch SAE Category 1

Max. lift force

At lift points 820 kg (1808 lbs)

24 in. behind lift point

640 kg (1411 lbs)

PTO

Rear-PTO SAE 1-3/8, 6 splines

PTO / Engine speed

540 min

-1

(rpm) / 2768 min-1 (rpm)

Mid-PTO USA No.5 (KUBOTA 10-tooth) involute spline

PTO / Engine speed

2500 min

-1

(rpm) / 2753 min-1 (rpm)

KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-8

4. TRAVELING SPEEDS

(At rated engine rpm)

The company reserves the right to change the specification without notice.

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Model B2301HSD

Tire size (Rear) 9.5-16 Farm / 33 × 12.5-15 Turf / 12-16.5 Industry

Range gear shift

lever

km/h (mile/h)

Forward

Low 0 to 5.6 (0 to 3.5)

Middle 0 to 8.8 (0 to 5.5)

High 0 to 19.1 (0 to 11.8)

Reverse

Low 0 to 4.2 (0 to 2.6)

Middle 0 to 6.6 (0 to 4.1)

High 0 to 14.3 (0 to 8.9)

Model B2601HSD

Tire size (Rear) 11.2-16 Farm 33 × 12.5-15 Turf / 12-16.5 Industry

Range gear shift

lever

km/h (mile/h)

Forward

Low 0 to 6.0 (0 to 3.7) 0 to 5.6 (0 to 3.5)

Middle 0 to 9.5 (0 to 5.9) 0 to 8.8 (0 to 5.5)

High 0 to 20.4 (0 to 12.7) 0 to 19.1 (0 to 11.8)

Reverse

Low 0 to 4.5 (0 to 2.8) 0 to 4.2 (0 to 2.6)

Middle 0 to 7.1 (0 to 4.4) 0 to 6.6 (0 to 4.1)

High 0 to 15.3 (0 to 9.5) 0 to 14.3 (0 to 8.9)

KiSC issued 11, 2014 A

INFORMATION

B2301, B2601, WSM

I-9

5. DIMENSIONS

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KiSC issued 11, 2014 A

G GENERAL

KiSC issued 11, 2014 A

CONTENTS

1. TRACTOR IDENTIFICATION ....................................................................................................... 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-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 EVERY 50 HOURS ............................................................................ G-19

[3] CHECK POINTS OF EVERY 100 HOURS .......................................................................... G-21

[4] CHECK POINTS OF EVERY 200 HOURS .......................................................................... G-25

[5] CHECK POINTS OF EVERY 400 HOURS .......................................................................... G-28

[6] CHECK POINT OF EVERY 800 HOURS ............................................................................. G-30

[7] CHECK POINT OF EVERY 1500 HOURS ........................................................................... G-30

[8] CHECK POINT OF EVERY 3000 HOURS ........................................................................... G-30

[9] CHECK POINT OF EVERY 1 YEAR .................................................................................... G-30

[10]CHECK POINTS OF EVERY 2 YEARS ............................................................................... G-31

[11]OTHERS............................................................................................................................... G-33

8. SPECIAL TOOLS ................................................................................................................

....... G-35

[1]

SPECIAL TO

OLS FOR ENGINE .......................................................................................... G-35

[2] SPECIAL TOOLS FOR TRACTOR ...................................................................................... G-42

9. TIRES ......................................................................................................................................... G-45

[1] TIRE PRESSURE................................................................................................................. G-45

[2] WHEEL ADJUSTMENT........................................................................................................ G-46

(1) Front Wheels .................................................................................................................. G-46

(2) Rear Wheels................................................................................................................... G-48

[3] BALLAST.............................................................................................................................. G-50

10. IMPLEMENT LIMITATIONS ....................................................................................................... G-52

GENERAL

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-1

1. TRACTOR IDENTIFICATION

When contacting your local KUBOTA distributor, always specify

engine serial number, tractor serial number and hour meter reading.

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(1) Tractor Identification Plate (2) Tractor Serial Number (3) Engine Serial Number

(4) ROPS Identification Plate

(ROPS Serial Number)

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, 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.

• Clean the parts before you measure them.

• Tighten the fittings to the specified torque. Too much torque can cause damage to the hydraulic units or the fittings. Not sufficient torque can cause oil leakage.

• When you use a new hose or pipe, tighten the nuts to the specified torque. Then loosen (approx. by 45 °) and let them be stable before you tighten to the specified torque (This is not applied to the parts with seal tape).

• When you remove the two ends of a pipe, remove the lower end first.

• Use two pliers in removal and installation. One to hold the stable side, and the other to turn the side you remove to prevent twists.

• Make sure that the sleeves of flared connectors and tapers of hoses are free of dust and scratches.

• After you tighten the fittings, clean the joint and apply the maximum operation pressure 2 to 3 times to check oil leakage.

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(1) Grease (2) Force (3) Sharp Edge (4) Axial Force (5) Rotating Movement

(A) External Circlip (B) Internal Circlip

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-3

3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING

To ensure safety and prevent damage to the machine and surrounding equipment, obey 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 try 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.

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[1] WIRING

• Securely tighten wiring terminals.

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• Do not let wiring contact dangerous part.

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• Repair or change torn or aged wiring immediately.

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(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 11, 2014 A

GENERAL

B2301, B2601, WSM

G-4

• Securely insert grommet.

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• Securely clamp, being careful not to damage wiring.

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• Clamp wiring so that there is no twist, unnecessary sag, or excessive tension, except for movable part, where sag be required.

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• In installing a part, be careful not to get wiring caught by it.

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• After installing wiring, check protection of terminals and clamped condition of wiring.

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(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 11, 2014 A

GENERAL

B2301, B2601, WSM

G-5

[2] BATTERY

• Be careful not to confuse positive and negative terminal posts.

• When you remove battery cables, disconnect negative cable first. When you install battery cables, check for polarity and connect positive cable first.

• Do not install any battery with capacity other than is specified (Ah).

• After you connect 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.

DANGER

To avoid serious injury or death:

• Be careful not to let battery liquid spill on your skin and clothes. If contaminated, wash it off with water immediately.

• Before you recharge the battery, remove it from the machine.

• Before you recharge, remove cell caps.

• Recharge in a well-ventilated place where there is no open flame nearby, as hydrogen gas and oxygen are formed.

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[3] FUSE

• Use fuses with specified capacity. Neither too large nor small capacity fuse is acceptable.

• Never use steel nor 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.

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[4] CONNECTOR

• For connector with lock, push lock to separate.

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• In separating connectors, do not pull wire harnesses.

• Hold connector bodies to separate.

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(1) Fuse (2) Fusible Link

(3) Slow Blow Fuse

(A) Push

(A) Correct (B) Incorrect

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-6

• Use sandpaper to remove rust from terminals.

• Repair deformed terminal. Make sure that there is no terminal being exposed or displaced.

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• Make sure that there is no female connector being too open.

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• Make sure that plastic cover is large enough to cover whole connector.

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[5] HANDLING OF CIRCUIT TESTER

• Use tester correctly following manual provided with tester.

• Check for polarity and range.

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(1) Exposed Terminal (2) Deformed Terminal

(3) Sandpaper (4) Rust

(A) Correct (B) Incorrect

(1) Cover (A) Correct

(B) Incorrect

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-7

[6] COLOR OF WIRING

• Colors of wire are specified to the color codes.

• This symbol of "/" shows color with stripe(s).

(An example)

Red stripe on white color: W/R

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Color of wiring Color code

Black B

Brown Br

Green G

Gray Gy or Gr

Blue L

Light Green Lg

Orange Or

Pink P

Purple Pu or V

Red R

Sky Blue Sb

White W

Yell ow Y

(1) Wire Color (2) Stripe

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-8

4. LUBRICANTS, FUEL AND COOLANT

NOTE

• *KUBOTA UDT or SUPER UDT fluid --- KUBOTA original transmission hydraulic fluid

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No. Place

Capacity

Lubricants, fuel and coolant

B2301 B2601

1 Fuel tank

23 L

6.1 U.S.gals

5.1 Imp.gals

• No. 2-D diesel fuel

• No. 1-D diesel fuel if temperature is below –10 °C (14 °F)

Coolant (with recovery tank)

3.8 L

4.0 U.S.qts

3.3 Imp.qts

Fresh clean soft water with anti-freeze

Engine crankcase (with filter)

3.1 L

3.3 U.S.qts

2.7 Imp.qts

Engine oil: Refer to next page

• Above 25 °C (77 °F) SAE30, SAE10W-30 or 15W-40

• −10 to 25 °C (14 to 77 °F) SAE20, SAE10W-30 or 15W-40

• Below −10 °C (14 °F) SAE10W-30

4 Transmission case

15 L

4.0 U.S.gals

3.3 Imp.gals

KUBOTA SUPER UDT-2 fluid*

5 Front axle case

3.5 L

3.7 U.S.qts

3.1 Imp.qts

KUBOTA SUPER UDT-2 fluid* or SAE80 - SAE90 gear oil

Greasing No. of greasing point Capacity Type of grease

5. TIGHTENING TORQUES

Tighten screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual

according to the table below.

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[1] GENERAL USE SCREWS, BOLTS AND NUTS

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[2] STUD BOLTS

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Indication on top of bolt

No-grade or 4T 7T 9T

Indication on top of nut

No-grade or 4T

Material of opponent part Ordinariness Aluminum Ordinariness Aluminum Ordinariness

Unit N·m kgf·m lbf·ft N·m kgf·m lbf·ft N·m kgf·m lbf·ft N·m kgf·m lbf·ft N·m kgf·m lbf·ft

7.9 to

9.3

0.80 to

0.95

5.8 to

6.8

7.9 to

8.8

0.80 to

0.90

5.8 to

6.5

9.81 to

11. 2

1.00 to

1.15

7.24 to

8.31

7.9 to

8.8

0.80 to

0.90

5.8 to

6.5

12.3 to

14.2

1.25 to

1.45

9.05 to

10.4

1.8 to

2.1

1.7 to

2.0

2.4 to

2.8

1.8 to

2.1

3.0 to

3.5

M10

4.0 to

4.6

3.2 to

3.5

4.9 to

5.7

4.0 to

4.5

6.2 to

7.2

M12

6.4 to

7.4

to 53–––

7.9 to

9.2

6.4 to

7.4

103

117

10.5 to

12.0

76.0 to

86.7

M14

108

125

11. 0 to

12.8

79.6 to

92.5

–––

124

147

12.6 to

15.0

91.2 to

108

–––

196

17.0 to

20.0

123

144

M16

167

191

17.0 to

19.5

123

–––

197

225

20.0 to

23.0

145

166

–––

260

304

26.5 to

31.0

192

224

M18

246

284

25.0 to

29.0

181

209

–––

275

318

28.0 to

32.5

203

235

–––

344

402

35.0 to

41.0

254

296

M20

334

392

34.0 to

40.0

246

289

–––

368

431

37.5 to

44.0

272

318

–––

491

568

50.0 to

58.0

362

419

Material of opponent part Ordinariness Aluminum

Unit N·m kgf·m lbf·ft N·m kgf·m lbf·ft

1.2 to

1.6

8.7 to

8.9 to

0.90 to

1.2

6.5 to

8.6

M10

2.5 to

3.2

2.0 to

2.6

M12

3.0 to

5.0

to 3631 3.2 23

M14

6.3 to

7.5

to 54–––

M16

98.1 to

112

10.0 to

11. 5

72.4 to

83.1

–––

M18

172

201

17.5 to

20.5

127

148

–––

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-12

[3] METRIC SCREWS, BOLTS AND NUTS

WSM000001GEG0003US0

[4] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH

UNC OR UNF THREADS

WSM000001GEG0008US0

[5] PLUGS

WSM000001GEG0005US0

Grade

Property class 8.8 Property class 10.9

Unit N·m kgf·m lbf·ft N·m kgf·m lbf·ft

M8 24 to 27 2.4 to 2.8 18 to 20 30 to 34 3.0 to 3.5 22 to 25

M10 48 to 55 4.9 to 5.7 36 to 41 61 to 70 6.2 to 7.2 45 to 52

M12 78 to 90 7.9 to 9.2 58 to 66 103 to 117 10.5 to 12.0 76.0 to 86.7

M14 124 to 147 12.6 to 15.0 91.2 to 108 167 to 196 17.0 to 20.0 123 to 144

M16 197 to 225 20.0 to 23.0 145 to 166 260 to 304 26.5 to 31.0 192 to 224

Grade

SAE GR.5 SAE GR.8

Unit N·m kgf·m lbf·ft N·m kgf·m lbf·ft

1/4 11.7 to 15.7 1.20 to 1.60 8.63 to 11.5 16.3 to 19.7 1.67 to 2.00 12.0 to 14.6

5/16 23.1 to 27.7 2.36 to 2.82 17.0 to 20.5 33 to 39 3.4 to 3.9 25 to 28

3/8 48 to 56 4.9 to 5.7 36 to 41 61 to 73 6.3 to 7.4 45 to 53

1/2 110 to 130 11.3 to 13.2 81.2 to 95.8 150 to 178 15.3 to 18.1 111 to 131

9/16 150 to 178 15.3 to 18.1 111 to 131 217 to 260 22.2 to 26.5 160 to 191

5/8 204 to 244 20.8 to 24.8 151 to 179 299 to 357 30.5 to 36.4 221 to 263

Shape Size

Material of opponent part

Ordinariness Aluminum

N·m kgf·m lbf·ft N·m kgf·m lbf·ft

Tapered screw

R1/8 13 to 21 1.3 to 2.2 9.4 to 15 13 to 19 1.3 to 2.0 9.4 to 14

R1/4 25 to 44 2.5 to 4.5 18 to 32 25 to 34 2.5 to 3.5 18 to 25

R3/8 49 to 88 5.0 to 9.0 37 to 65 49 to 58 5.0 to 6.0 37 to 43

R1/2 58.9 to 107 6.00 to 11.0 43.4 to 79.5 59 to 78 6.0 to 8.0 44 to 57

Straight screw G1/4 25 to 34 2.5 to 3.5 18 to 25 – – –

G3/8 62 to 82 6.3 to 8.4 46 to 60 – – –

G1/2 49 to 88 5.0 to 9.0 37 to 65 – – –

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-13

6. MAINTENANCE CHECK LIST

No. Item

Indication on hour meter

Interval

Refer-

ence page

50 100 150 200 250 300 350 400 450 500 550 600 650 700 800

1 Engine oil Change 

every

200 Hr

G-26

2 Engine oil filter Replace 

every

200 Hr

G-25

3 Transmission oil filters [HST] Replace 

every

200 Hr

G-26

4 Hydraulic oil filter Replace 

every

400 Hr

G-29

5 Transmission fluid Change 

every

400 Hr

G-28

6 Front axle case oil Change 

every

400 Hr

G-29

7 Front axle pivot Adjust 

every

400 Hr

G-30

8 Engine start system Check 

every 50 Hr

G-19

9 Greasing – 

every 50 Hr

G-20

10 Wheel bolt torque Check 

every 50 Hr

G-20

11 Battery condition Check 

every

100 Hr

G-21 *4

Air cleaner element [Double element type] Primary element

Clean 

every

100 Hr

G-23 *1

Replace

every 1

year

G-30 *2

Air cleaner element [Double element type] Secondary element

Replace

every 1

year

G-30

13 Fuel filter element

Clean 

every

100 Hr

G-24

Replace 

every

400 Hr

G-30

14 Fan belt Adjust 

every

100 Hr

G-24

15 Brake Adjust



every

100 Hr

G-25

16 Radiator

hose and clamp

Check 

every

200 Hr

G-27

Replace

every 2

years

G-33

17 Fuel line

Check 

every

100 Hr

G-25

Replace

every 2

years

G-33 *3

18 Intake air line

Check 

every

200 Hr

G-27

Replace

every 2

years

G-33 *3

19 Toe-in Adjust 

every

200 Hr

G-28

20 Engine valve clearance Adjust 

every

800 Hr

G-30

Fuel injection nozzle injection pressure

Check

every

1500 Hr

G-30 @

22 Injection pump Check

every

3000 Hr

G-30 @

23 Cooling system Flush

every 2

years

G-31

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-14

IMPORTANT

• The jobs indicated by  must be done after the first 50 hours of operation. *1 Air cleaner should be cleaned more often in severe dusty conditions. *2 Every year or after 6 cleanings. *3 Replace only if necessary. *4 When the battery is used for less than 100 hours per year, check the fluid level annually.

• The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction. Please see the Warranty Statement in detail.

9Y1211156GEG0004US0

24 Coolant Change

every 2

years

G-31

25 Fuel system Bleed

Service

as re-

quired

G-33

26 Clutch housing water Drain G-33

27 Fuse Replace G-34

28 Light bulb Replace G-34

No. Item

Indication on hour meter

Interval

Refer-

ence page

50 100 150 200 250 300 350 400 450 500 550 600 650 700 800

KiSC issued 11, 2014 A

GENERAL

B2301, B2601, WSM

G-15

7. CHECK AND MAINTENANCE

[1] DAILY CHECK

WARNING

To avoid personal injury or death: Take the following precautions when checking the tractor.

• Park the machine on firm and level ground.

• Set the parking brake.

• Lower the implement to the ground.

• All residual pressure of the hydraulic system released.

• Stop the engine and remove the key.

9Y1211156GEG0005US0

Walk Around Inspection

1. Look around and under the tractor for such items as loose bolts, trash build-up, oil or coolant leaks, broken or worn parts.

9Y1211156GEG0006US0

Checking and Refueling

WARNING

To avoid personal injury or death:

• Do not smoke while refueling.

• Be sure to stop the engine before refueling.

1. Turn the key switch to "ON", check the amount of fuel by fuel gauge.

2. Fill fuel tank when fuel gauge shows 1/4 or less fuel in tank.

3. Use grade No.2-Diesel fuel at temperatures above −10 °C (14 °F). Use grade No.1-Diesel fuel at temperatures below −10 °C (14 °F).

IMPORTANT

• Do not permit dirt or trash to get into the fuel system.

• Be careful not to let the fuel tank become empty, otherwise air will enter the fuel system, necessitating bleeding before next engine start.

• Be careful not to spill during refueling. If you should spill, wipe it off at once, or it may cause a fire.

• To prevent condensation (water) accumulation in the fuel tank, fill the tank before parking overnight.

9Y1211156GEG0007US0

Fuel tank capacity

23 L

6.1 U.S.gals

5.1 Imp.gals

(1) Fuel Tank Cap

KiSC issued 11, 2014 A

+ 311 hidden pages

Kubota B2301, B2601 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

I INFORMATION

1. SAFETY FIRST

2. SAFETY DECALS

3. SPECIFICATIONS

4. TRAVELING SPEEDS

G GENERAL

1. TRACTOR IDENTIFICATION

2. GENERAL PRECAUTIONS

3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING

4. LUBRICANTS, FUEL AND COOLANT

5. TIGHTENING TORQUES

6. MAINTENANCE CHECK LIST

7. CHECK AND MAINTENANCE