Kubota L4400 Instruction manual

WORKSHOP MANUAL
TRACTOR
L4400
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TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of L4400. It is divided into
three parts, “General”, “Mechanism” and “Servicing” for each section.
■General
Information on the tractor identification, the general precautions, maintenance check
list, check and maintenance and special tools are described.
■Mechanism
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.
■Servicing
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.
December 2004
© KUBOTA Corporation 2004
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1
L4400 , 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.
■IMPORTANT : Indicates that equipment or property damage could result if instructions are not
followed.
■NOTE : Gives helpful information.
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2
L4400 , 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 to 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 injector.
Pay sufficient caution to electric shock when
performing work activities.
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3
L4400 , 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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4
L4400 , 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
L4400 , 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
L4400 , WSM SAFETY INSTRUCTIONS
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7
L4400 , WSM SAFETY INSTRUCTIONS
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8
L4400 , WSM SPECIFICATIONS
SPECIFICATIONS
NOTE: * Manufacture’s estimate. The company reserves the right to change the specifications without notice. W1028103
Model L4400
2WD 4WD
PTO power kW (HP) / rpm 28.0 (37.5) / 2600
Engine
Maker KUBOTA
Model V2203-M-E2A
Type Indirect injection, vertical, water-cooled 4 cycle diesel
Number of cylinders 4
Bore and stroke mm (in.) 87 X 92.4 (3.4 X 3.6)
Total displacement L (cu. in.) 2.197 (134.1)
Engine net power kW (HP) / rpm 32.1 (43.0) / 2600
Rated revolution rps (rpm) 43.4 (2600)
Maximum torque N·m (ft-lbs) 139.5 (102.9)
Battery 12 V. RC : 133 min., CCA : 582 A
Fuel Diesel fuel No.1 [below -10 °C (14 °F)]
Diesel fuel No.2 [below -10 °C (14 °F)]
Capacities
Fuel tank L (U.S.gals) 42 (11.1)
Engine crankcase (with filter)
L (U.S.qts) 7.6 (8.0)
Engine coolant L (U.S.qts) 6.5 (6.9)
Transmission case L (U.S.gals) 40 (10.6)
Dimensions
Overall length (without 3P) mm (in.) 3115 (122.6) 3005 (118.3)
Overall width (min. tread) mm (in.) 1585 (62.4)
Overall height (with ROPS) mm (in.) 2170 (85.4)
Overall height (Top of steering wheel)
mm (in.) 1495 (58.9)
Wheel base mm (in.) 1850 (72.8) 1845 (72.6)
Min. ground clearance mm (in.) 385 (15.2)
Tread Front mm (in.) 1280 (50.4), 1380 (54.3),
1480 (58.3), 1580 (62.2) 1155 (45.5)
Rear mm (in.) 1180 (46.5), 1200 (47.2), 1300 (51.2), 1450 (57.1), 1545 (60.8)
Weight (with ROPS) kg (lbs) 1375 (3031) 1430 (3153)
Clutch Dry type single stage
Traveling
system
Tires AG Front 7.5L - 15 8.3 - 16
AG Rear 14.9 - 24
Indust (option) Front / Rear 10 - 16.5 / 17.5L - 24
Steering Hydrostatic power steering
Transmission Gear shift, 8 forward and 4 reverse
Brake Mechanical, wet disk type
Min. turning radius (without brake)
m (feet) 2.6 (8.5)
Hydraulic
unit
Hydraulic control system Position control
Pump capacity (main) L /min (gal/min) 29.4 (7.8)
Pump capacity (PS) L /min (gal/min) 17.9 (4.7)
Three point hitch Category I
Max. lift force At lift points kg (lbs) 1300 (2870)
24 in. behind lift points
kg (lbs) 1053 (2310)
System pressure MPa (kgf/cm2) [psi] 17.7 (180) [2560]
PTO Rear PTO SAE 1-3/8, 6 splines
PTO / Engine speed rpm 540 / 2475
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9
L4400 , WSM DIMENSIONS
DIMENSIONS
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G GENERAL
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CONTENTS
GENERAL
1. TRACTOR INDENTIFICATION....................................................................... 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-7
4. LUBRICANTS, FUEL AND COOLANT ......................................................... G-8
5. TIGHTENING TORQUES ............................................................................... G-9
[1] GENERAL USE SCREWS, BOLTS AND NUTS................................... G-9
6. MAINTENANCE ............................................................................................. G-10
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-16
[4] CHECK POINT OF EVERY 100 HOURS ........................................... G-19
[5] CHECK POINTS OF EVERY 200 HOURS......................................... G-25
[6] CHECK POINTS OF EVERY 400 HOURS......................................... G-28
[7] CHECK POINTS OF EVERY 600 HOURS......................................... G-28
[8] CHECK POINT OF EVERY 800 HOURS ........................................... G-28
[9] CHECK POINT OF EVERY 1500 HOURS ......................................... G-28
[10]CHECK POINT OF EVERY 3000 HOURS ......................................... G-29
[11]CHECK POINT OF EVERY 1 YEAR................................................... G-29
[12]CHECK POINTS OF EVERY 2 YEARS.............................................. G-29
[13]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-49
[1] TIRE PRESSURE................................................................................... G-49
[2] TREADS ADJUSTMENT ........................................................................ G-50
(1) Front Wheels...................................................................................... G-50
(2) Rear Wheels ...................................................................................... G-53
[3] TIRE LIQUID INJECTION...................................................................... G-54
[4] IMPLEMENT LIMITATIONS.................................................................... G-58
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G-1
L4400 , WSM G GENERAL
1. TRACTOR INDENTIFICATION
W1010590
(1) Tractor Identification Plate
(2) Tractor Serial Number (3) Engine Serial Number (4) Hour Meter
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G-2
L4400 , 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.
W1010794
(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement
(A) External Snap Ring
(B) Internal Snap Ring
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G-3
L4400 , 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.
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.
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
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G-4
L4400 , 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
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G-5
L4400 , 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
(1) Fuse (2) Fusible Link
(A) Push
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G-6
L4400 , WSM G GENERAL
• In separating connectors, do not pull wire harnesses.
• Hold connector bodies to separate.
W10122720
• Use sandpaper to remove rust from terminals.
• Repair deformed terminal. Make certain there is no terminal
being exposed or displaced
W10259430
• Make certain that there is no female connector being too open.
W10263490
• Make certain plastic cover is large enough to cover whole
connector.
W10264410
(A) Correct (B) Incorrect
(1) Exposed Terminal
(2) Deformed Terminal (3) Sandpaper (4) Rust
(A) Correct (B) Incorrect
(1) Cover (A) Correct
(B) Incorrect
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G-7
L4400 , WSM G GENERAL
[5] HANDLING OF CIRCUIT TESTER
• Use tester correctly following manual provided with tester.
• Check for polarity and range.
W10267220
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