Kubota BX1860 Instruction manual

BX1860,BX2360,BX2660,
RCK48-18BX,RCK54-23BX,
RCK60B-23BX,RCK48P-18BX,
RCK54P-23BX,LA203,LA243
WORKSHOP MANUAL
TRACTOR,ROTARY MOWER,
FRONT LOADER
KiSC issued 06, 2009 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of KUBOTA Tractor BX1860,
BX2360, BX2660, KUBOTA Rotary Mower RCK48-18BX, RCK54-23BX, RCK60B-
23BX, RCK48P-18BX, RCK54P-23BX and KUBOTA Front Loader LA203, LA243. It is
divided into three parts, “General”, “Mechanism” and “Servicing” for each section.
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-
01875 / 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.
August 2008
© KUBOTA Corporation 2008
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SAFETY INSTRUCTIONS
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SAFETY INSTRUCTIONS
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SAFETY INSTRUCTIONS
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SPECIFICATIONS
SPECIFICATIONS
NOTE: * Manufacture’s estimate The company reserves the right to change the specifications without notice.
** See and check “IMPLEMENT LIMITATIONS”.
W1028103
Model BX1860 BX2360 BX2660
PTO power 10.2 kW (13.7 HP)* 13.2 kW (17.7 HP)* 14.5 kW (19.5 HP)*
Engine
Maker KUBOTA
Model D722-E3-BX-2 D902-E3-BX-2 D1005-E3-BX
Type Indirect Injection, vertical, water-cooled, 4-cycle diesel
Number of cylinders 3
Bore and stroke 67 ×68 mm
(2.64 ×2.68 in.)
72 ×73.6 mm
(2.83 ×2.90 in.)
76 ×73.6 mm
(2.99 ×2.90 in.)
Total displacement 719 cm3(43.9 cu.in.) 898 cm3(54.8 cu.in.) 1001 cm3(61.1 cu.in.)
Engine gross power 13.4 kW (18.0 HP) 17.1 kW (23.0 HP) 19.0 kW (25.5 HP)
Rated revolution 3200 min-1 (rpm)
Maximum torque 44.9N·m (4.6kgf·m, 33.1
lbf·ft)
56.1 N·m (5.7kgf·m,
41.4lbf·ft)
60.2 N·m (6.1 kgf·m, 44.4
lbf·ft)
Battery 12 V, RC : 62 min., CCA :
435 A 12 V, RC : 80 min., CCA : 535 A
Fuel Diesel fuel No. 1 [below −10 °C (14 °F)], Diesel fuel No. 2 [above −10 °C (14 °F)]
Capacities
Fuel tank 25 L (6.6 U.S.gals, 5.5 Imp.gals.)
Engine crankcase (with filter) 2.9 L (3.1 U.S.qts., 2.6
Imp.qts.)
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 2.5 L (2.6 U.S.qts., 2.2
Imp.qts.)
2.7 L (2.8 U.S.qts., 2.4
Imp.qts.)
2.9 L (3.1 U.S.qts., 2.6
Imp.qts.)
Recovery tank 0.4 L (0.4 U.S.qts., 0.4 Imp.qts.)
Transmission case 11.6 L (3.06 U.S.gals, 2.55 Imp.gals.)
Dimensions
Overall length (without 3P) 2035 mm (80.1 in.) 2120 mm (83.5 in.)
Overall length (with 3P) 2340 mm (92.1 in.) 2425 mm (95.5 in.)
Overall width (min. tread) 1145 mm (45.1 in.)
Overall height (with ROPS) 1760 mm (69.3in.) 1785 mm (70.3 in.)
Overall height (Top of seat) 1230 mm (48.4 in.) 1255 mm (49.4 in.) 1330 mm (52.4 in.)
Wheel base 1340 mm (52.8 in.) 1400 mm (55.1 in.)
Minimum ground clearance 150 mm (5.9 in.) 175 mm (6.9 in.)
Tread Front 880 mm (34.6 in.) 910 mm (35.8 in.)
Rear 820 mm (32.2 in.)
Weight (with ROPS) 570 kg (1256.6 lbs) 585 kg (1289.7 lbs) 636 kg (1402.1 lbs)
Clutch N / A
Travelling
system
Tires Front 16 ×7.50 – 8 18 ×8.50 – 10
Rear 24 ×12.00 – 12 26 ×12.00 – 12
Steering Hydrostatic type power steering
Transmission Main: hydrostatic transmission, High-Low gear shift (2 forward and 2 reverse)
Brake Wet disk type
Min. turning radius (without brake) 2.18 m (7.15 feet) 2.3 m (7.5 feet)
Hydraulic
system
Hydraulic control system Directional control, auto-return lever system
Pump capacity 23.5 L/min. (6.2 U.S.gals./min., 5.2 Imp.gals./min.)
Three point hitch SAE Category I
Max. lift force
At lift points 5390 N (1210 lbs)**
24 in. behind lift
points 3040 N (680 lbs)**
PTO
Rear PTO PTO shaft SAE 1-3/8, 6 splines
Revolution 1 speed (540 min-1 (rpm) at engine 3142 min-1 (rpm))
Mid PTO shaft USA No. 5 (KUBOTA 10-tooth) involute spline
Revolution 1 speed (2500 min-1 (rpm) at engine 3043 min-1 (rpm))
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM TRAVELING SPEEDS
TRAVELING SPEEDS
(At rated engine rpm)
The company reserves the right to change the specifications without notice.
W1035065
Model BX1860 BX2360
BX2660
Tire size (Rear) 24 ×12.00 – 12 26 ×12.00 – 12
Range gear shift lever km/h mph km/h mph
Forward Low 0 to 5.5 0 to 3.4 0 to 6.0 0 to 3.7
High 0 to 12.0 0 to 7.5 0 to 13.0 0 to 8.1
Reverse Low 0 to 4.5 0 to 2.5 0 to 4.5 0 to 2.8
High 0 to 9.0 0 to 5.6 0 to 10.0 0 to 6.2
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM DIMENSIONS
DIMENSIONS
KiSC issued 06, 2009 A

G GENERAL
KiSC issued 06, 2009 A

CONTENTS
GENERAL
1. TRACTOR IDENTIFICATION ......................................................................... G-1
[1] 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
4. LUBRICANTS, FUEL AND COOLANT ......................................................... G-7
5. TIGHTENING TORQUES ............................................................................... G-9
[1] GENERAL USE SCREWS, BOLTS AND NUTS................................... G-9
[2] STUD BOLTS............................................................................................ G-9
[3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC
OR UNF THREADS ............................................................................... G-10
[4] PLUGS ..................................................................................................... G-10
6. MAINTENANCE CHECK LIST ..................................................................... G-11
7. CHECK AND MAINTENANCE ..................................................................... G-12
[1] DAILY CHECK ........................................................................................ G-12
[2] CHECK POINTS OF INITIAL 50 HOURS ........................................... G-13
[3] CHECK POINTS OF EVERY 50 HOURS ........................................... G-15
[4] CHECK POINTS OF EVERY 100 HOURS ......................................... G-17
[5] CHECK POINTS OF EVERY 200 HOURS ......................................... G-22
[6] CHECK POINTS OF EVERY 400 HOURS ......................................... G-24
[7] CHECK POINT OF EVERY 500 HOURS ........................................... G-25
[8] CHECK POINT OF EVERY 800 HOURS ........................................... G-25
[9] CHECK POINT OF EVERY 1500 HOURS ......................................... G-25
[10]CHECK POINT OF EVERY 3000 HOURS ......................................... G-25
[11]CHECK POINT OF EVERY 1 YEAR................................................... G-25
[12]CHECK POINTS OF EVERY 2 YEARS.............................................. G-26
[13]OTHERS .................................................................................................. G-30
8. SPECIAL TOOLS.......................................................................................... G-32
[1] SPECIAL TOOLS FOR ENGINE .......................................................... G-32
[2] SPECIAL TOOLS FOR TRACTOR....................................................... G-37
9. TIRES............................................................................................................. G-41
[1] TIRE PRESSURE ................................................................................... G-41
[2] WHEEL TREAD ...................................................................................... G-42
(1) Front Wheels...................................................................................... G-42
(2) Rear Wheels ...................................................................................... G-43
[3] BALLAST ................................................................................................. G-44
(1) Front Ballast....................................................................................... G-44
(2) Rear Ballast ....................................................................................... G-45
10. IMPLEMENT LIMITATIONS.......................................................................... G-46
KiSC issued 06, 2009 A

G-1
BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM G GENERAL
1. TRACTOR IDENTIFICATION
[1] SERIAL NUMBER
When contacting your local KUBOTA distributor, always specify
engine serial number, tractor serial number and hour meter reading.
W1010590
[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
(1) Tractor Identification Plate
(2) Tractor Serial Number
(3) Engine Serial Number
(4) Hour Meter
KiSC issued 06, 2009 A

G-2
BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
W10109040
(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement
(A) External Snap Ring
(B) Internal Snap Ring
KiSC issued 06, 2009 A

G-3
BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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.
W10111140
[1] WIRING
• Securely tighten wiring terminals.
W10112160
• Do not let wiring contact dangerous part.
W10113130
• Securely insert grommet.
W10113880
(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) Grommet (A) Correct
(B) Incorrect
KiSC issued 06, 2009 A

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BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM G GENERAL
• Securely clamp, being careful not to damage wiring.
W10114580
• Clamp wiring so that there is no twist, unnecessary sag, or
excessive tension, except for movable part, where sag be
required.
W10115870
• In installing a part, take care not to get wiring caught by it.
W10116700
• After installing wiring, check protection of terminals and clamped
condition of wiring, only connect battery.
W10117350
(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, 2009 A

G-5
BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM G GENERAL
[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.
W10118160
[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.
W10120920
[4] CONNECTOR
• For connector with lock, push lock to separate.
W10122110
• In separating connectors, do not pull wire harnesses.
• Hold connector bodies to separate.
W10122720
(1) Fuse (2) Slow Blow Fuse
(A) Push
(A) Correct (B) Incorrect
KiSC issued 06, 2009 A