MODELS V2607-DI-T-E3-B
1G777-8911-6
V3307-DI-T-E3-B
1ABAHAAAP0140
[V2607-DI-T-E3-B]
1ABAHAAAP0010
[V3307-DI-T-E3-B]
ENGLISH
FOREWORDFOREWORD
You are now the proud owner of a KUBOTA Engine. This engine is a
product of KUBOTA quality engineering and manufacturing. It is made
of fi ne materials and under a rigid quality control system. It will give you
long, satisfactory service. To obtain the best use of your engine, please
read this manual carefully. It will help you become familiar with the
operation of the engine and contains many helpful hints about engine
maintenance. It is KUBOTA’s policy to utilize as quickly as possible every
advance in our research. The immediate use of new techniques in the
manufacture of products may cause some small parts of this manual to be
outdated. KUBOTA distributors and dealers will have the most up-to-date
information. Please do not hesitate to consult with them.
3
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 assemble
or use this unit.
DANGER : Indicates an imminently hazardous situation which, if
3
SAFETY FIRSTSAFETY FIRST
not avoided, will result in death or serious injury.
WARNING : Indicates a potentially hazardous situation which, if not
3
CAUTION : Indicates a potentially hazardous situation which, if not
3
IMPORTANT : Indicates that equipment or property damage could
NOTE : Gives helpful information.
avoided, COULD result in death or serious injury.
avoided, MAY result in minor or moderate injury.
result if instructions are not followed.
CONTENTS
SAFE OPERATION .............................................................................................. 1
SERVICING OF THE ENGINE .................................................................................. 1
NAMES OF PARTS ................................................................................................... 2
PRE-OPERATION CHECK........................................................................................ 3
BREAK-IN............................................................................................................. 3
DAILY CHECK...................................................................................................... 3
OPERATING THE ENGINE....................................................................................... 4
STARTING THE ENGINE(NORMAL)................................................................... 4
COLD WEATHER STARTING.............................................................................. 5
STOPPING THE ENGINE .................................................................................... 6
CHECKS DURING OPERATION ......................................................................... 6
Radiator Cooling water(Coolant) ...................................................................................... 6
Oil pressure lamp ............................................................................................................. 7
Charge lamp .....................................................................................................................7
Fuel .................................................................................................................................. 7
Color of exhaust ............................................................................................................... 7
Immediately stop the engine if;......................................................................................... 7
REVERSED ENGINE REVOLUTION AND REMEDIES ...................................... 7
How to tell when the engine starts running backwards .................................................... 7
Remedies ......................................................................................................................... 7
MAINTENANCE......................................................................................................... 8
SERVICE INTERVALS ......................................................................................... 9
PERIODIC SERVICE............................................................................................... 11
FUEL................................................................................................................... 11
Fuel level check and refueling ........................................................................................ 11
Air bleeding the fuel system ........................................................................................... 11
Checking the fuel pipes .................................................................................................. 13
Cleaning the fuel filter pot............................................................................................... 13
Fuel filter cartridge replacement..................................................................................... 14
ENGINE OIL ....................................................................................................... 14
Checking oil level and adding engine oil ........................................................................ 14
Changing engine oil........................................................................................................ 15
Replacing the oil filter cartridge ...................................................................................... 16
RADIATOR ......................................................................................................... 16
Checking coolant level, adding coolant .......................................................................... 17
Changing coolant ........................................................................................................... 18
Remedies for quick decrease of coolant ........................................................................ 18
Checking radiator hoses and clamp bands .................................................................... 18
Precaution at overheating .............................................................................................. 18
Cleaning radiator core(outside) ...................................................................................... 18
Anti-freeze ...................................................................................................................... 19
AIR CLEANER.................................................................................................... 20
Cleaning Primary Air Filter Element ............................................................................... 20
Evacuator valve.............................................................................................................. 20
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CONTENTS
ENGLISH
For the air cleaner with a dust cup (optional) ................................................................. 20
Dust indicator (optional) ................................................................................................. 21
ELECTRIC WIRING............................................................................................ 21
FAN BELT........................................................................................................... 21
Adjusting Fan Belt Tension ............................................................................................ 21
CARRIAGE AND STORAGE ................................................................................... 22
CARRIAGE ......................................................................................................... 22
STORAGE .......................................................................................................... 22
TROUBLESHOOTING............................................................................................. 23
SPECIFICATIONS ................................................................................................... 25
WIRING DIAGRAMS ............................................................................................... 26
SAFE OPERATION
1SAFE OPERATION
Careful operation is your best assurance against an accident. Read and understand this
section carefully before operating the engine. All operators, no matter how much
experience they may have, should read this and other related manuals before operating
the engine or any equipment attached to it. It is the owner's obligation to provide all
operators with this information and instruct them on safe operation.
Be sure to observe the following for safe operation.
1. OBSERVE SAFETY INSTRUCTIONS
A Read and understand carefully this "OPERATOR'S
MANUAL" and "LABELS ON THE ENGINE" before
attempting to start and operate the engine.
A Learn how to operate and work safely. Know your
equipment and its limitations. Always keep the engine
in good condition.
A Before allowing other people to use your engine,
explain how to operate and have them read this manual
before operation.
A DO NOT modify the engine. UNAUTHORIZED
MODIFICATIONS to the engine may impair the
function and/or safety and affect engine life. If the
engine does not perform properly, consult your local
Kubota Engine Distributor first.
2. WEAR SAFE CLOTHING AND PERSONAL PROTECTIVE EQUIPMENT (PPE)
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A DO NOT wear loose, torn or bulky clothing around the
machine that may catch on working controls and
projections or into fans, pulleys and other moving parts
causing personal injury.
A Use additional safety items-PPE, e.g. hard hat, safety
protection, safety goggles, gloves, etc., as appropriate
or required.
A DO NOT operate the machine or any equipment
attached to it while under the influence of alcohol,
medication, or other drugs, or while fatigued.
A DO NOT wear radio or music headphones while
operating the engine.
2 SAFE OPERATION
3. CHECK BEFORE STARTING & OPERATING THE ENGINE
A Be sure to inspect the engine before operation. Do not
ENGLISH
operate the engine if there is something wrong with it.
Repair it immediately.
A Ensure all guards and shields are in place before operating
the engine. Replace any that are damaged or missing.
A Check to see that you and others are a safe distance
from the engine before starting.
A Always keep the engine at least 3 feet (1 meter) away
from buildings and other facilities.
A DO NOT allow children or livestock to approach the
machine while the engine is running.
A DO NOT start the engine by shorting across starter
terminals. The machine may start in gear and move. Do
not bypass or defeat any safety devices.
4. KEEP THE ENGINE AND SURROUNDINGS CLEAN
A Be sure to stop the engine before cleaning.
A Keep the engine clean and free of accumulated dirt,
grease and trash to avoid a fire. Store flammable fluids
in proper containers and cabinets away from sparks
and heat.
A Check for and repair leaks immediately.
A DO NOT stop the engine without idling; Allow the
engine to cool down, first. Keep the engine idling for
about 5 minutes before stopping unless there is a
safety problem that requires immediate shut down.
5. SAFE HANDLING OF FUEL AND LUBRICANTS -KEEP AWAY FROM FIRE
A Always stop the engine before refueling and/or
lubricating.
A DO NOT smoke or allow flames or sparks in your work
area. Fuel is extremely flammable and explosive under
certain conditions.
A Refuel at a well ventilated and open place. When fuel
and/or lubricants are spilled, refuel after letting the
engine cool down.
A DO NOT mix gasoline or alcohol with diesel fuel. The
mixture can cause a fire or severe engine damage.
A Do not use unapproved containers e.g. buckets,
bottles, jars. Use approved fuel storage containers and
dispensers.
6. EXHAUST GASES & FIRE PREVENTION
A Engine exhaust fumes can be very harmful if allowed to
accumulate. Be sure to run the engine in a well
ventilated location and where there are no people or
livestock near the engine.
A The exhaust gas from the muffler is very hot. To
prevent a fire, do not expose dry grass, mowed grass,
oil or any other combustible materials to exhaust gas.
Keep the engine and muffler clean at all times.
A To avoid a fire, be alert for leaks of flammable
substances from hoses and lines. Be sure to check for
leaks from hoses or pipes, such as fuel and hydraulic
fluid by following the maintenance check list.
A To avoid a fire, do not short across power cables and
wires. Check to see that all power cables and wirings
are in good condition. Keep all electrical connections
clean. Bare wire or frayed insulation can cause a
dangerous electrical shock and personal injury.
7. ESCAPING FLUID
A Relieve all pressure in the air, the oil and the cooling
systems before disconnecting any lines, fittings or
related items.
A Be cautious of possible pressure relief when
disconnecting any device from a pressurized system
that utilizes pressure. DO NOT check for pressure
leaks with your hand. High pressure oil or fuel can
cause personal injury.
A Escaping fluid under pressure has sufficient force to
penetrate skin causing serious personal injury.
A Fluid escaping from pinholes may be invisible. Use a
piece of cardboard or wood to search for suspected
leaks: do not use hands and body. Use safety goggles
or other eye protection when checking for leaks.
A If injured by escaping fluid, see a medical doctor
immediately. This fluid can produce gangrene or
severe allergic reaction.
3SAFE OPERATION
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4 SAFE OPERATION
8. CAUTIONS AGAINST BURNS & BATTERY EXPLOSION
A To avoid burns, be cautious of hot components, e.g.
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muffler, muffler cover, radiator, hoses, engine body,
coolants, engine oil, EGR, etc. during operation and
after the engine has been shut off.
A DO NOT remove the radiator cap while the engine is
running or immediately after stopping. Otherwise hot
water will spout out from the radiator. Wait until the
radiator is completely cool to the touch before removing
the cap. Wear safety goggles.
A Be sure to close the coolant drain valve, secure the
pressure cap, and fasten the pipe band before
operating. If these parts are taken off, or loosened, it
will result in serious personal injury.
A The battery presents an explosive hazard. When the
battery is being charged, hydrogen and oxygen gases
are extremely explosive.
A
DO NOT use or charge the battery if its fluid level is below
the LOWER mark.
Otherwise, the component parts may deteriorate earlier
than expected, which may shorten the service life or cause
an explosion. Immediately, add distilled water until the
fluid level is between the UPPER and LOWER marks.
A Keep sparks and open flames away from the battery,
especially during charging. DO NOT strike a match
near the battery.
A
DO NOT check the battery charge by placing a metal object
across the terminals. Use a voltmeter or hydrometer.
A DO NOT charge a frozen battery. There is a risk of
explosion. When frozen, warm the battery up to at least
16°C (61°F).
9. KEEP HANDS AND BODY AWAY FROM ROTATING PARTS
A Be sure to stop the engine before checking or adjusting
the belt tension and cooling fan.
A Keep your hands and body away from rotating parts,
such as the cooling fan, V-belt, fan drive pulley or
flywheel. Contact with rotating parts can cause severe
personal injury.
A DO NOT run the engine without safety guards. Install
safety guards securely before operation.
10.ANTI-FREEZE & DISPOSAL OF FLUIDS
A Anti-freeze contains poison. Wear rubber gloves to
avoid personal injury. In case of contact with skin, wash
it off immediately.
A
DO NOT mix different types of Anti-freeze. The mixture can
produce a chemical reaction causing harmful substances.
Use approved or genuine KUBOTA Anti-freeze.
A Be mindful of the environment and the ecology. Before
draining any fluids, determine the correct way to
dispose of them. Observe the relevant environmental
protection regulations when disposing of oil, fuel,
coolant, brake fluid, filters and batteries.
A When draining fluids from the engine, place a suitable
container underneath the engine body.
A DO NOT pour waste onto the ground, down a drain, or
into any water source. Dispose of waste fluids
according to environmental regulations.
11.CONDUCTING SAFETY CHECKS & MAINTENANCE
A When inspecting the engine or servicing, place the
engine on a large flat surface. DO NOT work on
anything that is supported ONLY by lift jacks or a hoist.
Always use blocks or the correct stands to support the
engine before servicing.
A Disconnect the battery from the engine before
conducting service. Put a "DO NOT OPERATE!" tag on
the key switch to avoid accidental starting.
A To avoid sparks from an accidental short circuit always
disconnect the battery's ground cable (-) first and
reconnect it last.
A Be sure to stop the engine and remove the key when
conducting daily and periodic maintenance, service
and cleaning.
A
Check or conduct maintenance after the engine, coolant,
muffler, or muffler cover have cooled off completely.
A Always use the appropriate tools and fixtures. Verify
that they are in good condition before performing any
service work. Make sure you understand how to use
them before service.
A Use ONLY correct engine barring techniques for
manually rotating the engine. DO NOT attempt to rotate
the engine by pulling or prying on the cooling fan and
V-belt. This practice can cause serious personal injury
or premature damage to the cooling fan and belt.
5SAFE OPERATION
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6 SAFE OPERATION
A Replace fuel pipes and lubricant pipes with their hose
clamps every 2 years or earlier whether they are
damaged or not. They are made of rubber and age
gradually.
A When servicing is performed together by two or more
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persons, take care to perform all work safely.
A Keep a first aid kit and fire extinguisher handy at all
times.
12. WARNING AND CAUTION LABELS
Part No.19077-8724-1 or 16667-8724-1
(55mm in diameter) (37mm in diameter)
Part No.TA040-4957-1
Stay clear of engine
fan and fan belt
13. CARE OF WARNING AND CAUTION LABELS
1. Keep warning and caution labels clean and free from obstructing material.
2. Clean warning and caution labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing warning and caution labels with new labels from your local
KUBOTA dealer.
4. If a component with warning and caution label(s) affixed is replaced with a new part, make sure
the new label(s) is (are) attached in the same location(s) as the replaced component.
5. Mount new warning and caution labels by applying to a clean dry surface and pressing any
bubbles to the outside edge.
SERVICING OF THE ENGINE
1SERVICING OF THE ENGINE
Your dealer is interested in your new engine and has the
desire to help you get the most value from it. After
reading this manual thoroughly, you will find that you
can do some of the regular maintenance yourself.
However, when in need of parts or major service, be
sure to see your KUBOTA dealer.
For service, contact the KUBOTA Dealership from
which you purchased your engine or your local
KUBOTA dealer.
When in need of parts, be prepared to give your dealer
the engine serial number.
Locate the serial number now and record them in the
space provided.
Type Serial No.
Engine
Date of
Purchase
Name of Dealer
(To be filled in by purchaser)
[V2607-DI-T-E3-B]
ENGLISH
[V3307-DI-T-E3-B]
(1) Engine serial number
2 NAMES OF PARTS
NAMES OF PARTS
[V2607-DI-T-E3-B]
ENGLISH
[V3307-DI-T-E3-B]
(1) Intake manifold
(2) Speed control lever
(3) Engine stop lever
(4) Injection pump
(5) Fuel feed pump
(6) Cooling fan
(7) Fan drive pulley
(8) Oil filter cartridge
(9) Oil filler plug
(10) Exhaust manifold
(11) Alternator
(12) Starter
(13) Oil level gauge
(14) Oil pressure switch
(15) Flywheel
(16) Oil drain plug
(17) Oil pan
(18) Turbo charger
(19) Engine hook
(20) EGR cooler
PRE-OPERATION CHECK
3PRE-OPERATION CHECK
BREAK-IN
During the engine break-in period, observe the following by all means:
1. Change engine oil and oil filter cartridge after the first 50 hours of operation (See "ENGINE OIL" in "PERIODIC
SERVICE" Section).
2. When ambient temperature is low, operate the machine after the engine has been completely warmed up.
DAILY CHECK
To prevent trouble from occurring, it is important to know the conditions of the engine well. Check it before starting.
CAUTION
To avoid personal injury:
A Be sure to install shields and safeguards attached to the engine when operating.
A Stop the engine at a flat and wide space when checking.
A Keep dust or fuel away from the battery, wiring, muffler and engine to prevent a fire.
Check and clear them before operating everyday. Pay attention to the heat of the
exhaust pipe or exhaust gas so that it can not ignite trash.
Item Ref. page
1. Parts which had trouble in previous operation -
2. By walking around the machine (1) Oil or water leaks 14, 16
(2) Engine oil level and contamination 14
(3) Amount of fuel 11
(4) Amount of coolant 17
(5) Dust in air cleaner dust cup 20
(6) Damaged parts and loosened bolts and nuts -
3. By inserting the key into the starter
switch
4. By starting the engine (1) Color of exhaust fumes 7
(1) Proper functions of meters and pilot lamps; no stains on
these parts
(2) Proper function of glow lamp timer -
(2) Unusual engine noise 7
-
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4 OPERATING THE ENGINE
OPERATING THE ENGINE
STARTING THE ENGINE(NORMAL)
ENGLISH
CAUTION
To avoid personal injury:
A Do not allow children to approach
the machine while the engine is
running.
A Be sure to install the machine on
which the engine is installed, on a
flat place.
A Do not run the engine on gradients.
A Do not run the engine in an enclosed
area. Exhaust gas can cause air
pollution and exhaust gas
poisoning.
A Keep your hands away from rotating
parts (such as fan, pulley, belt,
flywheel etc.) during operation.
A Do not operate the machine while
under the influence of alcohol or
drugs.
A Do not wear loose, torn or bulky
clothing around the machine. It may
catch on moving parts or controls,
leading to the risk of accident. Use
additional safety items, e.g. hard
hat, safety boots or shoes, eye and
hearing protection, gloves, etc., as
appropriate or required.
A Do not wear radio or music
headphones while operating engine.
A Check to see if it is safe around the
engine before starting.
A Reinstall safeguards and shields
securely and clear all maintenance
tools when starting the engine after
maintenance.
1. Set the fuel lever to the "ON" position.
(1) Fuel lever (A) "ON"
2. Place the engine stop lever to the
"START" position.
3. Place the speed control lever at more
than half "OPERATION".
[V2607-DI-T-E3-B]
(B) "OFF"
A Do not use ether or any starting fluid for starting the
engine, or a severe damage will occur.
A When starting the engine after a long storage (of
more than 3 months), first set the stop lever to the
"STOP" position and then activate the starter for
about 10 seconds to allow oil to reach every engine
part.
5OPERATING THE ENGINE
[V3307-DI-T-E3-B]
(1) Engine stop lever
(2) Speed Control lever
(A) "STOP"
(B) "START"
(C) "IDLING"
(D) "OPERATION"
4. Insert the key into the key switch and
turn it "ON".
6. Turn the key to the "STARTING"
position and the engine should start.
Release the key immediately when the
engine starts.
7. Check to see that the oil pressure lamp
and charge lamp are off. If the lamps are
still on, immediately stop the engine,
and determine the cause.
(See "CHECKS DURING OPERATION" in
"OPERATING THE ENGINE" Section)
A If the oil pressure lamp should be still on,
immediately stop the engine and check;
- if there is enough engine oil.
- if the engine oil has dirt in it.
- if the wiring is faulty.
8. Warm up the engine at medium speed
without load.
A If the glow lamp should redden too quickly or too
slowly, immediately ask your KUBOTA dealer to
check and repair it.
A If the engine does not catch or start at 10 seconds
after the starter switch is set at "STARTING"
position, wait for another 30 seconds and then begin
the engine starting sequence again. Do not allow the
starter motor to run continuously for more than 20
seconds.
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(A) "SWITCHED OFF"
(B) "OPERATION"
(C) "PREHEATING"
(D) "STARTING"
(A) "PREHEATING"
(B) "SWITCHED OFF"
(C) "OPERATION"
(D) "STARTING"
5. Turn the starter switch to the
"PREHEATING" position to allow the
glow lamp to redden.
(with lamp timer in use)
A The glow lamp goes out in about 5 seconds when
the lamp timer is up. Refer to this for pre-heating.
Even with the glow lamp off, the glow plug can be
pre-heated by turning the starter switch to the
"PREHEATING" position.
COLD WEATHER STARTING
If the ambient temperature is below -5°C(23°F)* and the
engine is very cold, start it in the following manner:
Take steps (1) through (4) above.
5. Turn the key to the "PREHEATING
(GLOW)" position and keep it there for a
certain period mentioned below.
A Shown below are the standard preheating times for
various temperatures. This operation, however, is
not required, when the engine is warmed up.
Ambient temperature Preheating time
Above 10°C (50°F) NO NEED
10°C (50°F) to -5°C (23°F) Approx. 5 seconds
*Below -5°C (23°F) Approx. 10 seconds
Limit of continuous use 20 seconds
6 OPERATING THE ENGINE
6. Turn the key to the "ST (STARTING)"
position and the engine should start.
(If the engine fails to start after 10 seconds,
turn off the key for 5 to 30 seconds. Then
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repeat steps (5) and (6).)
A Do not allow the starter motor to run continuously for
more than 20 seconds.
A Be sure to warm up the engine, not only in winter, but
also in warmer seasons. An insufficiently warmed-up
engine can shorten its service life.
A When there is fear of temperature dropping below
-15°C (5°F) detach the battery from the machine,
and keep it indoors in a safe area, to be reinstalled
just before the next operation.
STOPPING THE ENGINE
1. Return the speed control lever to low
idle and run the engine under idling
conditions.
A If equipped with a turbo-charger, allow the engine to
idle for 5 minutes before shutting it off after a full load
operation.
Failure to do so may lead to turbo-charger trouble.
2. The engine should stop with the starter
switch placed at the "OFF" position. (In
case of non-stopping, set the engine
stop lever to the "STOP" position
manually.)
[V2607-DI-T-E3-B]
[V3307-DI-T-E3-B]
(1) Engine stop lever (A) "STOP"
CHECKS DURING OPERATION
While running, make the following checks to see that all
parts are working correctly.
BRadiator Cooling water(Coolant)
3. After stopping the engine, remove the
key. (Be sure to return the engine stop
lever to the "START" position to be
ready for the next starting in case of
manually stopping.)
WARNING
To avoid personal injury:
A Do not remove radiator cap until
coolant temperature is well below
its boiling point. Then loosen cap
slightly to the stop position, to
relieve any pressure, before
removing cap completely.
If the coolant temperature warning lamp lights up or if
steam or coolant does not stop squirting from the
radiator overflow pipe, turn off the load and keep the
engine idling (COOLING-DOWN) for at least 5
minutes to let it cool down gradually. Then stop the
engine and take the following inspection and servicing.
7OPERATING THE ENGINE
1. Check to see if the coolant runs short or if there is any
coolant leak;
2. Check to see if there is any obstacle around the
cooling air inlet or outlet;
3. Check to see if there is any dirt or dust between
radiator fins and tube;
4. Check to see if the fan belt is too loose; and
5. Check to see if radiator water pipe is clogged.
BOil pressure lamp
The lamp lights up to warn the operator that the engine
oil pressure has dropped below the prescribed level. If
this should happen during operation or should not go off
even after the engine is accelerated more than
1000rpm, immediately stop the engine and check the
following:
1. Engine oil level (See "ENGINE OIL" in
"MAINTENANCE" Section).
BCharge lamp
The lamp lights up to warn the operator that the battery
charge is low. If this should happen during operation,
immediately stop the engine and check the following:
1. Cable broken
2. Poor connection at alternator terminal
3. Fan belt too loose or damaged
BFuel
WARNING
To avoid personal injury:
A Fluid escaping from pinholes may
be invisible. Do not use hands to
search for suspected leaks; Use a
piece of cardboard or wood,
instead. If injured by escaping fluid,
see a medical doctor at once. This
fluid can produce gangrene or a
severe allergic reaction.
A Check any leaks from fuel pipes or
fuel injection pipes. Use eye
protection when checking for leaks.
Be careful not to empty the fuel tank. Otherwise air may
enter the fuel system, requiring fuel system bleeding.
(See "FUEL" in Periodic service Section).
BColor of exhaust
While the engine is run within the rated output range:
A The color of exhaust remains colorless.
A If the output slightly exceeds the rated level, exhaust
may become a little colored with the output level kept
constant.
A If the engine is run continuously with dark exhaust
emission, it may lead to trouble with the engine.
BImmediately stop the engine if;
A The engine suddenly slows down or accelerates.
A Unusual noises are suddenly heard.
A Exhaust fumes suddenly become very dark.
A The oil pressure lamp or the water temperature
alarm lamp lights up.
REVERSED ENGINE REVOLUTION AND
REMEDIES
CAUTION
To avoid personal injury:
A Reversed engine operation can
make the machine reverse and run it
backwards. It may lead to serious
trouble.
A Reversed engine operation may
make exhaust gas gush out into the
intake side and ignite the air
cleaner; It could catch fire.
Reversed engine revolution must be stopped
immediately since engine oil circulation is cut quickly,
leading to serious trouble.
BHow to tell when the engine starts running
backwards
1. Lubricating oil pressure drops sharply. Oil pressure
warning light, if used, will light.
2. Since the intake and exhaust sides are reversed, the
sound of the engine changes, and exhaust gas will
come out of the air cleaner.
3. A louder knocking sound will be heard when the
engine starts running backwards.
BRemedies
1. Immediately set the engine stop lever to the "STOP"
position to stop the engine.
2. After stopping the engine, check the air cleaner,
intake rubber tube and other parts, and then replace
parts as needed.
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8 MAINTENANCE
MAINTENANCE
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CAUTION
To avoid personal injury:
A Be sure to conduct daily checks,
periodic maintenance, refueling or
cleaning on a level surface with the
engine shut off and remove the key.
A Before allowing other people to use
your engine, explain how to operate,
and have them read this manual
before operation.
A When cleaning any parts, do not use
gasoline but use regular cleanser.
A Always use proper tools, that are in
good condition. Make sure you
understand how to use them, before
performing any service work.
A When installing, be sure to tighten
all bolts lest they should be loose.
Tighten the bolts by the specified
torque.
A Do not put any tools on the battery,
or battery terminals may short out.
Severe burns or fire could result.
Detach the battery from the engine
before maintenance.
A Do not touch muffler or exhaust
pipes while they are hot; Severe
burns could result.
SERVICE INTERVALS
Observe the following for service and maintenance.
9MAINTENANCE
No. Item
1 Check of fuel pipes and clamp bands 13 @
2 Cleaning of air cleaner element 20 *1 @
3 Cleaning of fuel filter 13
4 Check of fan belt tightness 21
5 Check of radiator hoses and clamp bands 18
6 Check of intake air line -@
7 Replacing the oil filter cartridge 16
8 Replacement of fuel filter cartridge 14 @
9 Removal of sediment in fuel tank -
10 Cleaning of water jacket (radiator interior) 17
11 Replacement of fan belt 21
12 Check of valve clearance Every 1000 hours 23
Check of fuel injection nozzle injection
13
pressure
14 Check of turbo charger Every 3000 hours - *3 @
15 Check of injection pump Every 3000 hours - *3 @
16 Replacement of air cleaner element Every one years 20 *2 @
17 Change of radiator coolant (L.L.C.) Every two years 17
Replacement of radiator hoses and clamp
18
bands
19 Replacement of fuel pipes and clamp bands Every two years 13 *3 @
20 Replacement of intake air line Every two years - *4 @
21 Changing engine oil See NOTE 15
100 200 250 300 400 500
Interval
Every 1500 hours - *3 @
Every two years 18
Ref.page
ENGLISH
A The jobs indicated by must be done after the first 50 hours of operation.
*1 Air cleaner should be cleaned more often in dusty conditions than in normal conditions.
*2 After 6 times of cleaning.
*3 Consult your local KUBOTA Dealer for this service.
*4 Replace only if necessary.
A 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.
10 MAINTENANCE
A Changing interval of engine oil
Models Interval
V2607-DI-T-E3-B,
V3307-DI-T-E3-B
ENGLISH
Initial 50 Hrs
A API service classification: above CF grade
A Ambient temperature: below 35°C (95°F)
Lubricating oil
With the emission control now in effect, the CF-4 and CI-4 lubricating oils have been developed for use of a lowsulfur fuel on on-road vehicle engines.
A Lubricating oil recommended when a low-sulfur or high-sulfur fuel is employed.
: Recommendable - : Not recommendable
Lubricating
oil class
CF - *TBN 10
CI-4 -
Low sulfur High sulfur
* TBN: Total Base Number
A Oil used in the engine should have an American Petroleum Institute (API) service classification and Proper SAE
Engine Oil according to the ambient temperatures as shown below:
500 Hrs or 1 year
whichever comes first
Fuel
Remarks
Above 25°C
(77°F)
-10°C to 25°C
(14°F to 77°F)
Below -10°C
(14°F)
A Recommended API categorization
Third Stage Exhaust Emissions Regulations Specification.
Fuel used Engine oil grade
Ultra Low Sulfur
Fuel
(< 15 ppm)
EGR: Exhaust Gas Re-circulation
A The CJ-4 engine oil is intended for DPF (Diesel Particulate Filter) type engines
SAE30, SAE10W-30 or 15W-40
SAE10W-30 or 15W-40
SAE10W-30
CF or CI-4
(Class CF-4, CG-4 and CH-4
engine, oils cannot be used on
EGR type engines)
PERIODIC SERVICE
11PERIODIC SERVICE
FUEL
Fuel is flammable and can be dangerous. You should
handle fuel with care.
CAUTION
To avoid personal injury:
A Do not mix gasoline or alcohol with
diesel fuel. This mixture can cause
an explosion.
A Be careful not to spill fuel during
refueling. If fuel should spill, wipe it
off at once, or it may cause a fire.
A Do not fail to stop the engine before
refueling. Keep the engine away
from the fire.
A Be sure to stop the engine while
refueling or bleeding and when
cleaning or changing fuel filter or
fuel pipes. Do not smoke when
working around the battery or when
refueling.
A Check the above fuel systems at a
well ventilated and wide place.
A When fuel and lubricant are spilled,
refuel after letting the engine cool
off.
A Always keep spilled fuel and
lubricant away from engine.
BFuel level check and refueling
1. Check to see that the fuel level is above the lower
limit of the fuel level gauge.
2. If the fuel is too low, add fuel to the upper limit. Do
not overfill.
A No.2-D is a distillate fuel oil of lower volatility for
engines in industrial and heavy mobile service.
(SAE J313 JUN87)
A Diesel fuels specified to EN 590 or ASTM D975 are
recommended.
Distillation
Tempera-
tures,
°C(°F)
90% Point
Min Max Min Max Min Max Max Max Min
282
(540)
A Cetane number of 45 minimum. Cetane number
greater than 50 is preferred, especially for
temperatures below -20°C (-4°F) or elevations
above 1500 m (5000 ft).
A If diesel fuel with sulfur content greater than 0.5 %
sulfur content is used, reduce the service interval for
engine oil and filter by 50%.
A DO NOT use diesel fuel with sulfur content greater
than 1.0%.
A
This engine conforms to EPA Tier 4 and Interim Tier 4.
The law specifies the use of ultra low sulfur fuel at EPA
regulated area (North America). To comply with this law,
use No.1-D S15 diesel fuel as an alternative to No.1-D
when the temperature is below -10°C (-14°F).
A Be sure to use a strainer when filling the fuel tank, or
dirt or sand in the fuel may cause trouble in the fuel
injection pump.
A For fuel, always use diesel fuel. You are required not
to use alternative fuel, because its quality is
unknown or it may be inferior in quality. Kerosene,
which is very low in cetane rating, adversely affects
the engine. Diesel fuel differs in grades depending
on the temperature.
A Be careful not to let the fuel tank become empty, or
air can enter the fuel system, necessitating bleeding
before next engine start.
Viscosity
Kinematic
cSt or mm2/s
at 40°C
338
1.9 4.1 32.6 40.1 0.50 No. 3 40
(640)
Viscosity
Saybolt,
SUS at
37.8°C
(100°F)
Sul-
fur,
weight
%
Cop-
per
Strip
Corro-
sion
Cetane
Num-
ber
BAir bleeding the fuel system
ENGLISH
Flash Point,
°C
(°F)
Min Max Max Max
52
(125)
Water and
Sediment,
volume
%
0.05 0.35 0.01
Carbon
Residue on,
10 percent
Residuum,
%
Ash,
weight
%
CAUTION
To avoid personal injury;
A Do not bleed a hot engine as this
could cause fuel to spill onto a hot
exhaust manifold creating a danger
of fire.
12 PERIODIC SERVICE
Air bleeding of the fuel system is required if;
A after the fuel filter and pipes have been detached
and refitted;
A after the fuel tank has become empty; or
A before the engine is to be used after a long storage.
ENGLISH
[PROCEDURE ] (gravity feed fuel tanks only)
1. Fill the fuel tank to the fullest extent. Open the fuel
filter lever.
2. Open the joint bolt on top of the fuel injection pump.
3. Turn the engine, continue it for about 10 seconds
and then stop it, or move the fuel feed pump lever by
hand (optional).
4. Close the joint bolt on top of the fuel injection pump.
A Always keep the air vent cock on the fuel injection
pump closed except when air is vented, or it may
cause the engine to stop.
[GRAVITY FEED SYSTEM]
[V2607-DI-T-E3-B]
[V3307-DI-T-E3-B]
[PROCEDURE ] (fuel tanks lower than injection
pump)
1. For fuel tanks that are lower than the injection pump.
The fuel system must be pressurized by the fuel
system electric fuel pump.
2. If an electric fuel pump is not used, you must
manually actuate the pump by lever to bleed.
3. The primary fuel filter must be on the pressure side
of the pump if the fuel tank is lower than the injection
pump.
4. To bleed, follow (2) through (4) above.
A Tighten air vent plug of the fuel injection pump
except when bleeding, or it may stop the engine
suddenly.
[TANK BELOW INJECTION PUMP SYSTEM]
(1) Fuel tank below injection pump
(2) Pre-filter
(3) Electric or Mechanical pump
(4) Main Filter
(5) Injection pump
(1) Joint bolt
(2) Fuel feed pump
A For the engine equipped with automatic venting
(optional) no manual bleeding of fuel lines is
required.
13PERIODIC SERVICE
BChecking the fuel pipes
CAUTION
To avoid personal injury;
A Check or replace the fuel pipes after
stopping the engine. Broken fuel
pipes can cause fires.
Check the fuel pipes every 50 hours of operation. When
if;
1. If the clamp band is loose, apply oil to the screw of
the band, and tighten the band securely.
2. If the fuel pipes, made of rubber, become worn out,
replace them and clamp bands every 2 years.
3. If the fuel pipes and clamp bands are found worn or
damaged before 2 years' pass, replace or repair
them at once.
4. After replacement of the pipes and bands, air-bleed
the fuel system.
A When the fuel pipes are not installed, plug them at
both ends with clean cloth or paper to prevent dirt
from entering. Dirt in the pipes can cause fuel
injection pump malfunction.
[V2607-DI-T-E3-B]
BCleaning the fuel filter pot
Every 250 hours of operation, clean the fuel filter in a
clean place to prevent dust intrusion.
1. Close the fuel filter lever.
(1) Fuel filter lever
(2) Fuel filter pot
2. Remove the top cap, and rinse the inside with diesel
fuel.
3. Take out the element, and rinse it with diesel fuel.
4. After cleaning, reinstall the fuel filter, keeping out of
dust and dirt.
5. Air-bleed the injection pump.
A Entrance of dust and dirt can cause a malfunction of
the fuel injection pump and the injection nozzle.
Wash the fuel filter cup periodically.
(A) "OFF"
(B) "ON"
ENGLISH
[V3307-DI-T-E3-B]
(1) Clamp band
(2) Fuel pipe
(1) O ring
(2) Filter element
(3) Spring
(4) Filter bowl
(5) Screw ring
14 PERIODIC SERVICE
BFuel filter cartridge replacement
1. Replace the fuel filter cartridge with a new one every
500 operating hours.
2. Apply fuel oil thinly over the gasket and tighten the
cartridge into position by hand-tightening only.
3. Finally, vent the air.
ENGLISH
A Do not operate a diesel engine when engine oil is
overfilled. This oil can drain through the air intake
system, which cause engine disacceleration and oil
leaks from breather pipings. It could result in a overrunning or oil hammering of engine in case of the
engine with suction blow-by gases breathed in.
A Replace the fuel filter cartridge periodically to
prevent wear of the fuel injection pump plunger or
the injection nozzle, due to dirt in the fuel.
(1) Fuel filter cartridge
(2) Air vent plug
(3) O ring
(4) Pipe joint
(5) Cover
A The fuel filter cartridge and water separator should
be replaced more earlier according to the fuel
classification in use.
ENGINE OIL
CAUTION
To avoid personal injury:
A Be sure to stop the engine before
checking and changing the engine
oil and the oil filter cartridge.
A Do not touch muffler or exhaust pipes
while they are hot; Severe burns
could result. Always stop the engine
and allow it to cool before conducting
inspections, maintenance, or for a
cleaning procedure.
A Contact with engine oil can damage
your skin. Put on gloves when using
engine oil. If you come in contact
with engine oil, wash it off
immediately.
BChecking oil level and adding engine oil
1. Check the engine oil level before starting or more
than 5 minutes after stopping the engine.
2. Remove the oil level gauge, wipe it clean and
reinstall it.
3. Take the oil level gauge out again, and check the oil
level.
[V2607-DI-T-E3-B]
[V3307-DI-T-E3-B]
(1) Oil level gauge
(2) Oil filler plug
4. If the oil level is too low, remove the oil filler plug, and
add new oil to the prescribed level.
5. After adding oil, wait more than 5 minutes and check
the oil level again. It takes some time for the oil to
drain down to the oil pan.
[Lower end of oil level gauge]
(A) Engine oil level within this
range is proper.
15PERIODIC SERVICE
Models Engine oil quantity
V2607-DI-T-E3-B 10.2 L (2.24 U.S.gals.)
V3307-DI-T-E3-B 11.2 L (2.95 U.S.gals.)
*API service classification: above CF grade
A Engine oil should be MIL-L-2104C or have
properties of API classification CF grades or higher.
Change the type of engine oil according to the
ambient temperature.
above 25°C (77°F)
-10°C to 25°C (14°F to 77°F)
below -10°C (14°F) SAE10W-30
A When using oil of different brands from the previous
one, be sure to drain all the previous oil before
adding the new engine oil.
A Be sure to inspect the engine, locating it on a level
place. If placed on gradients accurately,oil quantity
may not be measured.
SAE30 or SAE10W-30
SAE15W-40
SAE10W-30 or
SAE15W-40
BChanging engine oil
CAUTION
To avoid personal injury:
A Be sure to stop the engine before
draining engine oil.
A When draining engine oil, place
some container underneath the
engine and dispose it according to
local regulations.
A Do not drain oil after running the
engine. Allow engine to cool down
sufficiently.
1. Change oil after the initial 50 hours of operation and
every 500 hours thereafter.
When the annual operating hours are below 500,
replace the oil every year.
2. Remove the drain plug at the bottom of the engine,
and drain all the old oil. Drain oil will drain easier
when the oil is warm.
3. When letting out the oil, remove the filler plug too.
With the filler plug still in place, it would be difficult to
discharge the oil completely .
[V2607-DI-T-E3-B]
[V3307-DI-T-E3-B]
(1) Oil drain plug
4. Add new engine oil up to the upper limit of the oil
level gauge. Be careful not to add oil above the
upper limit of the oil level gauge.
ENGLISH
16 PERIODIC SERVICE
BReplacing the oil filter cartridge
CAUTION
To avoid personal injury:
A Be sure to stop the engine before
ENGLISH
changing the oil filter cartridge.
A Allow engine to cool down sufficiently,
oil can be hot and cause burns.
1. Replace the oil filter cartridge. Oil filter cartridge
should be replaced, after the initial 50 hours of
operation and every 500 hours thereafter.
2. Remove the old oil filter cartridge.
3. Apply a film of oil to the gasket for the new cartridge.
4. Screw in the cartridge by hand. When the gasket
contacts the seal surface, tighten the cartridge
enough by hand. Because, if you tighten the
cartridge with a wrench, it will be tightened too much.
[V2607-DI-T-E3-B]
RADIATOR
Coolant will last for one day's work if filled all the way up
before operation start. Make it a rule to check the
coolant level before every operation.
WARNING
To avoid personal injury:
A Do not stop the engine suddenly,
stop it after about 5 minutes of
unloaded idling.
A Work only after letting the engine
and radiator cool off completely
(more than 30 minutes after it has
been stopped).
A Do not remove the radiator cap
while coolant is hot. When cool to
the touch, rotate cap to the first stop
to allow excess pressure to escape.
Then remove cap completely.
If overheats should occur, steam
may gush out from the radiator or
recovery tank; Severe burns could
result.
[V3307-DI-T-E3-B]
(1) Oil filter cartridge
5. After the new cartridge has been replaced, the
engine oil level normally decreases a little. Thus, run
the engine for a while and check for oil leaks through
the seal before checking the engine oil level. Add oil
if necessary.
A Wipe off any oil sticking to the machine completely.
17PERIODIC SERVICE
BChecking coolant level, adding coolant
1. Remove the radiator cap, after the engine has
completely cooled, and check to see that coolant
reaches the supply port.
(1) Radiator pressure cap
2. If the radiator is provided with a recovery tank, check
the coolant level of the recovery tank. When it is
between the "FULL" and "LOW" marks, the coolant
will last for one day's work.
3. When the coolant level drops due to evaporation,
add water only up to the full level.
4. Check to see the drain cock; which is at the lower
part of the radiator as figures below.
(1) Coolant drain cock
A If the radiator cap has to be removed, follow the
caution and securely retighten the cap.
A If coolant should be leak, consult your local KUBOTA
dealer.
A Make sure that muddy or sea water does not enter
the radiator.
A Use clean, fresh water and 50% anti-freeze to fill the
recovery tank.
A Do not refill recovery tank with coolant over the
"FULL" level mark.
A Be sure to close the radiator cap securely. If the cap
is loose or improperly closed, coolant may leak out
and decrease quickly.
ENGLISH
(1) recovery tank (A) "FULL"
(B) "LOW"
18 PERIODIC SERVICE
BChanging coolant
1. To drain coolant, always open both drain cocks and
simultaneously open the radiator cap as well. With
the radiator cap kept closed, a complete drain of
water is impossible.
2. Remove the overflow pipe of the radiator pressure
ENGLISH
cap to drain the recovery tank.
3. Prescribed coolant volume (U.S.gallons)
Models Quantity
V2607-DI-T-E3-B 6.0 L (1.32 U.S.gals.)
V3307-DI-T-E3-B 6.3 L (1.67 U.S.gals.)
A Coolant quantities shown are for standard radiators.
4. An improperly tightened radiator cap or a gap
between the cap and the seat quickens loss of
coolant.
5. Check and clean the plug threads and surface and
the packing of the water drain plug to prevent dirt
and debris from the entering the engine.
6. Coolant (Radiator cleaner and anti-freeze)
Season Coolant
All seasons
7. After flushing, fill with clean water and anti-freeze
until the coolant level is just below the radiator cap.
Install the radiator cap securely.
8. Fill with coolant up to the "FULL" mark of recovery
tank.
9. Start and operate the engine for few minutes.
10.Stop the engine, remove the key and let cool.
11.Check coo lant level of recovery tank and add coolant
if necessary.
Pure water and anti-freeze
(See "Anti-freeze" in
RADIATOR section)
BRemedies for quick decrease of coolant
1. Check any dust and dirt between the radiator fins
and tube. If any, remove them from the fins and the
tube.
2. Check the tightness of the fan belt. If loose, tighten it
securely.
3. Check the internal blockage in the radiator hose. If
scale forms in the hose, clean with the scale inhibitor
or its equivalent.
BChecking radiator hoses and clamp bands
CAUTION
To avoid personal injury:
A Be sure to check radiator hoses and
clamp bands periodically. If radiator
hose is damaged or coolant leaks,
overheats or severe burns could
occur.
Check to see if radiator hoses are properly fixed every
250 hours of operation or 6 months, whichever comes
first.
1. If clamp bands are loose or water leaks, tighten hose
clamp securely.
2. Replace hoses and tighten clamp bands securely, if
radiator hoses are swollen, hardened or cracked.
Replace hoses and clamp bands every 2 years or
earlier, if checked and found that hoses are swollen,
hardened or cracked.
BPrecaution at overheating
The event that the coolant temperature is nearly or more
than the boiling point is called "OVERHEATING".
While running, make the following checks to see that all
parts are working correctly. If anything is unusual,
inspect it, referring to the relevant description in
"MAINTENANCE" and "PERIODIC SERVICE"
section.
C Coolant
If the coolant temperature warning lamp lights up or if
steam or coolant does not stop squirting from the
radiator overflow pipe, turn off the load and keep the
engine idling (COOLING-DOWN) for at least 5
minutes to let it cool down gradually. Then stop the
engine and take the following inspection and servicing.
1. Check to see if the coolant runs short or if there is
any coolant leak;
2. Check to see if there is any obstacle around the
cooling air inlet or outlet;
3. Check to see if there is any dirt or dust between
radiator fins and tube;
4. Check to see if the fan belt is too loose; and
5. Check to see if radiator water pipe is clogged.
BCleaning radiator core(outside)
If dust is between the fin and tube, wash it away with
running water.
A Do not clean radiator with firm tools such as spatulas
or screwdrivers. They may damage specified fin or
tube. It can cause coolant leaks or decrease cooling
performance.
19PERIODIC SERVICE
BAnti-freeze
CAUTION
To avoid personal injury:
A When using anti-freeze, put on some
protection such as rubber gloves (Antifreeze contains poison.).
A If should drink anti-freeze, throw up at
once and take medical attention.
A When anti-freeze comes in contact
with the skin or clothing, wash it off
immediately.
A Do not mix different types of anti-
freeze. The mixture can produce
chemical reaction causing harmful
substances.
A Anti-freeze is extremely flammable and
explosive under certain conditions.
Keep fire and children away from antifreeze.
A When draining fluids from the engine,
place some container underneath the
engine body.
A Do not pour waste onto the grounds,
down a drain, or into any water source.
A Also, observe the relevant
environmental protection regulations
when disposing of anti-freeze.
Vol %
Anti-freeze
50 -37 -34 108 226
*At 1.013 × 10 Pa (760 mmHg) pressure
(atmospheric). A higher boiling point is obtained by
using a radiator pressure cap which permits the
development of pressure within the cooling system.
5. Adding the LLC
(1) Add only water if the coolant level reduces in the
cooling system by evaporation.
(2) If there is a coolant leak, add the LLC of the
same manufacturer and type in the same cool-
ant percentage.
*Never add any long-life coolant of different manufacturer. (Different brands may have different additive components, and the engine may fail to perform
as specified.)
6. When the LLC is mixed, do not employ any radiator
cleaning agent. The LLC contains anti-corrosive
agent. If mixed with the cleaning agent, sludge may
build up, adversely affecting the engine parts.
7. Kubota's genuine long-life coolant has a service life
of 2 years. Be sure to change the coolant every 2
years.
A The above data represent industry standards that
necessitate a minimum glycol content in the
concentrated anti-freeze.
Freezing Point Boiling Point *
°C °F °C °F
ENGLISH
Always use a 50/50 mix of long-life coolant and clean
soft water in KUBOTA engines.
Contact KUBOTA concerning coolant for extreme
conditions.
1. Long-life coolant (hereafter LLC) comes in several
types. Use ethylene glycol (EG) type for this engine.
2. Before employing LLC-mixed cooling water, flush
the radiator with fresh water. Repeat this procedure
2 or 3 times to clean up the radiator and engine block
from inside.
3. Mixing the LLC
Premix 50% LLC with 50% clean soft water. When
mixing, stir it up well, and then fill into the radiator.
4. The procedure for the mixing of water and antifreeze differs according to the make of the antifreeze. Refer to SAE J1034 standard, more
specifically also to SAE J814c.
20 PERIODIC SERVICE
AIR CLEANER
Since the air cleaner employed on this engine is a dry
type, never apply oil to it.
1. Open the evacuator valve once a week under
ordinary conditions - or daily when used in a dusty
place. This will get rid of large particles of dust and
ENGLISH
dirt.
2. Wipe the inside air cleaner clean with cloth if it is dirty
or wet.
3. Avoid touching the primary element except when
cleaning.
4. When dry dust adheres to the element, blow
compressed air from the inside turning the element.
Pressure of compressed air must be under 205kPa
(2.1kgf/cm
5. Replace the primary element every year or every 6
cleanings. If the primary element is stained heavily,
replace it soon. At this time, replace the secondary
element too.
6. The secondary element should be removed only if it
is to be replaced.
7. To protect the engine, do not remove the secondary
element in servicing the primary element.
2
, 30psi).
BCleaning Primary Air Filter Element
To clean the element, use clean dry compressed air on
the inside of the element.Air pressure at the nozzle must
not exceed 205 kPa (2.1 kgf/cm; 30 psi).
Maintain reasonable distance between the nozzle and
the filter.
BEvacuator valve
Open the evacuator valve once a week under ordinary
conditions - or daily when used in a dusty place - to get
rid of large particles of dust and dirt.
BFor the air cleaner with a dust cup
(optional)
Remove and clean out the dust cup before it becomes
half full with dust; usually once a week, or even every
day if the working surroundings are dusty.
Install the air cleaner dust cup with "TOP" indicated on
the rear of the cup in the upside. (However, it may be
installed in either direction when the cover is placed at
the lower part.)
A If the dust cup is mounted incorrectly, dust or dirt
does not collect in the cup, and direct attachments of
the dust to the element will cause its lifetime to
shorten to a great extent.
(1) Air cleaner body
(2) Cover
(3) Secondary element
(4) Primary element
(5) Evacuator valve
A Make sure hooking clip for cover for the element is
tight enough. If it is loose, dust and dirt may be
sucked in, wearing down the cylinder liner and piston
ring earlier, and thereby resulting in poor power
output.
A Do not overservice the air cleaner element.
Overservicing may cause dirt to enter the engine
causing premature wear. Use the dust indicator as a
guide on when to service.
(1) Air cleaner body
(2) Secondary element
(3) Primary element
(4) Dust cup
(5) "TOP" mark
21PERIODIC SERVICE
BDust indicator (optional)
If the red signal on the dust indicator attached to the air
cleaner is visible, the air cleaner has reached the
service level.
Clean the element immediately, and reset the signal
with the "RESET" button.
(1) "RESET" button
(2) Dust indicator
(3) Service level
(4) Signal
ELECTRIC WIRING
CAUTION
To avoid personal injury:
C Shorting of electric cable or wiring
may cause a fire.
A Check to see if electric cables
and wiring are swollen,
hardened or cracked.
A Keep dust and water away from
all power connections.
Loose wiring terminal parts,
make bad connections. Be sure
to repair them before starting
the engine.
FAN BELT
BAdjusting Fan Belt Tension
CAUTION
To avoid personal injury:
A Be sure to stop the engine and
remove the key before checking the
belt tension.
A Be sure to reinstall the detached
safety shield after maintenance or
checking.
Proper fan belt
tension
1. Stop the engine and remove the key.
2. Apply moderate thumb pressure to belt between
pulleys.
3. If tension is incorrect, loosen the alternator mounting
bolts and, using a lever placed between the
alternator and the engine block, pull the alternator
out until the deflection of the belt falls within
acceptable limits.
4. Replace fan belt if it is damaged.
A If belt is loosen or damaged and the fan is damaged,
it could result in overheats or insufficient charging.
Correct or replace belt.
A deflection of between 10 to 12 mm
(0.39 to 0.47 in.) when the belt is
pressed in the middle of the span.
ENGLISH
Damaged wiring reduces the capacity of electrical parts.
Change or repair damaged wiring immediately.
(1) Fan belt
(2) Bolt and nut
(A) 10 to 12 mm (0.39 to 0.47 in.)
(under load of 10kgf (22 lbs))
22 CARRIAGE AND STORAGE
CARRIAGE AND STORAGE
CARRIAGE
ENGLISH
CAUTION
To avoid personal injury:
A Fix the engine securely not to fall
during operation.
A Do not stand near or under the
engine while carrying it.
A The engine is heavy. In handling it,
be very alert not to get your hands
and body caught in.
1. Use carrier such as crane when carrying the engine,
or hurt your waist and yourself. Support the engine
securely with rope not to fall while carrying it.
2. When lifting the engine, put the hook securely to
metal fittings attached to the engine. Use strong
hook and fittings enough to hang the engine.
STORAGE
CAUTION
To avoid personal injury:
A Do not clean the machine with
engine running.
A To avoid the danger of exhaust fume
poisoning, do not operate the
engine in a closed building without
proper ventilation.
A When storing the engine just after
running, let the engine cool off.
Before storing the engine for more than a few months,
remove any dirt on the machine, and:
1. Drain the coolant in the radiator. Open the cock at
the bottom of the radiator, and remove the pressure
cap to drain water completely. Leave the cock open.
Hang a note written "No water" on the pressure cap.
Since water may freeze when the temperature drops
below 0°C (32°F), it is very important that no water is
left in the machine.
2. Remove dirty engine oil, fill with new oil and run the
engine for about 5 minutes to let the oil penetrate to
all the parts.
3. Check all the bolts and nuts, and tighten if
necessary.
4. Remove the battery from the engine, adjust the
electrolyte level, and recharge it. Store the battery in
a dry and dark place.
5. When the engine is not used for a long period of
time, run it for about 5 minutes under no load every
2-3 months to keep it free from rust. If the engine is
stored without any running, moisture in the air may
condense into dew over the sliding parts of the
engine, resulting in rust there.
6. If you forget to run the engine for longer than 5-6
months, apply enough engine oil to the valve guide
and valve stem seal and make sure the valve works
smoothly before starting the engine.
7. Store the engine in a flat place and remove the key
from engine.
8. Do not store the engine in a place where has
flammable materials such as dry grass or straw.
9. When covering the engine for storage, let engine
and muffler cool off completely.
10.Operate the engine after checking and repairing
damaged wirings or pipes, and clearing flammable
materials carried by mouse.
TROUBLESHOOTING
23TROUBLESHOOTING
If the engine does not function properly, use the following chart to identify and correct the cause.
BWhen it is difficult to start the engine BWhen output is insufficient
Cause Countermeasures
*
Check the fuel tank and fuel filter.
*
Remove water, dirt and other
Fuel is thick and
doesn't flow.
Air or water mixed
in fuel system
Engine oil
becomes thick in
cold weather and
engine cranks
slow.
Battery is
discharged and
the engine will not
crank.
impurities.
*
As all fuel will be filtered by the filter,
if there should be water or other
foreign matters on the filter, clean the
filter with kerosene.
*
If air is in the fuel filter or injection
lines, the fuel pump will not work
properly.
*
To attain proper fuel injection
pressure, check carefully for
loosened fuel line coupling, loose cap
nut, etc.
*
Loosen joint bolt stop fuel filter and air
vent screws of fuel injection pump to
eliminate all the air in the fuel system.
* Change grade of oil according to the
weather (temperature.)
*
Charge battery.
*
In winter, always remove battery from
machine, charge fully and keep
indoors. Install in machine at time of
use.
A If the cause of trouble can not be found, contact your KUBOTA dealer.
Cause Countermeasures
Fuel is
insufficient.
Overheating of
moving parts
Air cleaner is dirty
Injection pump
wear
* Check fuel system.
*
Check lubricating oil system.
*
Check to see if lubricating oil filter is
working properly.
*
Filter element deposited with
impurities would cause poor
lubrication. Change element.
* Clean the element every 100 hours of
operation.
*
Do not use poor quality fuel as it will
cause wea r of the pump. Only use No.
2-D diesel fuel.(See "FUEL" in
"PERIODIC SERVICE" Section)
ENGLISH
24 TROUBLESHOOTING
BWhen engine suddenly stops
Cause Countermeasures
*
Check the fuel tank and refill the fuel,
Lack of fuel
ENGLISH
Bad nozzle
Moving parts are
overheated due to
shortage of
lubrication oil or
improper
lubrication.
if necessary.
*
Also check the fuel system for air or
leaks.
* If necessary, replace with a new
nozzle.
*
Check amount of engine oil with oil
level gauge.
*
Check lubricating oil system.
*
At every 2 times of oil change, oil
filter cartridge should be replaced.
BWhen color of exhaust is especially bad
Cause Countermeasures
Fuel is of
extremely poor
quality.
Nozzle is bad.
B
When engine must be stopped immediately
Cause Countermeasures
Color of exhaust
suddenly turns
dark.
Bearing parts are
overheated.
Oil lamp lights up
during operation.
* Select good quality fuel.
Use No. 2-D diesel fuel only.
* If necessary, replace with new
nozzle.
* Check the fuel injection system,
especially the fuel injection nozzle.
* Check the lubricating system.
*
Check the lubricating system.
*
Check the function of the relieve
valve in the lubricating system.
*
Check pressure switch.
*
Check filter base gasket.
BWhen engine overheats
Cause Countermeasures
Engine oil
insufficient
Fan belt broken or
elongated
Coolant insufficient * Replenish coolant.
Excessive
concentration of
antifreeze
Radiator net or
radiator fin clogged
with dust
Inside of radiator or
coolant flow route
corroded
Fan or radiator or
radiator cap
defective
Thermostat
defective
Temperature
gauge or sensor
defective
Overload running * Reduce load.
Head gasket
defective or water
leakage
Unsuitable fuel
used
* Check oil level. Replenish oil as
required.
* Change belt or adjust belt tension.
* Add water only or change to coolant
with the specified mixing ratio.
* Clean net or fin carefully.
* Clean or replace radiator and parts.
* Replace defective parts.
* Check thermostat and replace if
necessary.
* Check temp erature wi th
thermometer and replace if
necessary.
* Replace parts.
* Use the specified fuel.
SPECIFICATIONS
25SPECIFICATIONS
Model V2607-DI-T-E3-B V3307-DI-T-E3-B
Type Vertical, water-cooled, 4-cycle diesel engine
Number of cylinders 4
Bore and stroke mm (in.)
3
Total di spl acement cm
Combustion type Direct Injection Type (E-CDIS)
SAE NET Intermittent kW / rpm
H.P. (SAEJ1349) (HP / rpm)
SAE NET Continuous kW / rpm
H.P. (SAEJ1349) (HP / rpm)
Maximum bare speed rpm 2900 2800
Maximum bare idling speed rpm 825 to 875 775 to 825
Order of firing 1-3-4-2
Direction of rotation Counter-clockwise (viewed from flywheel side)
Injection pump Bosch Type mini pump
Injection pressure
Injection timing (T.D.C.) -0.022 rad (-1.25°) 0.023 rad (1.3°)
Compression ratio 19.0 20.0
Fuel Diesel Fuel No.2-D
Lubricant (API classification) above CF grade
Di men si on m m (i n.)
(length x width x height)
Dry weight (BB Spec.) kg (lbs.) 235 (518) 268 (591)
Starting system Cell starter (with glow plug)
Starting motor 12 V 2.5 kW 12 V 3.0 kW
Charging generator 12 V 720 W 12 V 720 W
Recommended battery capacity 12 V 92 Ah 12 V 108 Ah
(cu.in.)
87 x 110
(3.43 x 4.33)
2,615
(160.04)
49.2 / 2700
(66.0 / 2700)
42.7 / 2700
(57.2 / 2700)
1st opening pressure
18.63 Mpa (190 kgf/cm
2nd opening pressure
21.57 Mpa (220 kgf/cm
650 x 475 x 680
(25.6 x 18.7 x 26.8)
2
)
2
)
94 x 120
(3.70 x 4.72)
3,331
(203.27)
53.7 / 2600
(73.0 / 2600)
45.6 / 2600
(62.1 / 2600)
1st opening pressure
18.63 Mpa (190 kgf/cm
2nd opening pressure
22.56 Mpa (230 kgf/cm
674 x 506 x 739
(26.5 x 19.9 x 29.1)
ENGLISH
2
)
2
)
A Specifications are subject to change without notice.
26 WIRING DIAGRAMS
WIRING DIAGRAMS
ENGLISH
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