Kubota WSM 07-E3B Series Instruction manual

WORKSHOP MANUAL
DIESEL ENGINE
07-E3B SERIES
KiSC issued 06, 2020 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of 07-E3B series. It is divided
into three parts, “General”, “Mechanism” and “Servicing”.
General
Information on the engine 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 Mechanism Workshop Manual (Code No. 9Y021-01877) 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.
Due to covering many models of this manual, information or picture being used, have
not been specified as one model.
November 2007
© KUBOTA Corporation 2007
KiSC issued 06, 2020 A

Record of Revisions
For pdf, use search function {Search word} to find all the revised locations.
Last digit
of the
Code No.
Month of
Revision Main Revised Point and Corrective Measures {Search word} Reference
Page
62013.11 Correction of Workshop Manual
Model Name and Engine Serial Number
Battery Specific Gravity
Fuel System
G-1, G-2
G-21, S-32
M-11 to
M-16
72019.04 Correction of Workshop Manual
•Tightening Torque of Cylinder head mounting screw S-20,
S-49
82020.06 Added the information due to design change
•Tightening torque of cylinder head mounting screw [V3007, V3307] S-20,
S-49,
S-82
KiSC issued 06, 2020 A

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07-E3B SERIES, WSM SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
BEFORE SERVICING AND REPAIRING
• Read all instructions and safety instructions in this
manual and on your engine safety decals.
• Clean the work area and engine.
• Park the machine on a firm and level ground.
• Allow the engine to cool before proceeding.
• 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.
KiSC issued 06, 2020 A

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07-E3B SERIES, WSM SAFETY INSTRUCTIONS
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.
• Unauthorized modifications to the engine may impair
the function and / or safety and affect engine life.
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 touch the rotating or hot parts while the engine
is operating.
• Never remove the radiator cap while the engine is
operating, 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.
• Wear a suitable hearing protective device such as
earmuffs or earplugs to protect against objectionable
or uncomfortable loud noises.
• 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 is applied to the injector.
Pay sufficient caution to electric shock when
performing work activities.
KiSC issued 06, 2020 A

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07-E3B SERIES, 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 operating to do some work,
make sure the area is well ventilated. Never operate
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, 2020 A

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07-E3B SERIES, 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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07-E3B SERIES, WSM SPECIFICATIONS
SPECIFICATIONS
* The specification described above is of the standard engine of each model.
* Conversion Formula : HP = 0.746 kW, PS = 0.7355 kW
W1028103
Model V2607-DI-E3B V2607-DI-T-E3B
Number of Cylinder 4
Type Vertical, water-cooled, 4-cycle DI diesel engine
Bore Stroke 87.0 110 mm (3.43 4.33 in.)
Total Displacement 2615 cm3(159.6 cu.in.)
ISO Net Continuous 30.4 kW / 2700 min-1 (rpm)
(40.8 HP / 2700 min-1 (rpm))
41.3 kW / 2700 min-1 (rpm)
(55.4 HP / 2700 min-1 (rpm))
ISO / SAE Net Intermittent 35.0 kW / 2700 min-1 (rpm)
(46.9 HP / 2700 min-1 (rpm))
47.5 kW / 2700 min-1 (rpm)
(63.7 HP / 2700 min-1 (rpm))
SAE Gross Intermittent 36.5 kW / 2700 min-1 (rpm)
(48.9 HP / 2700 min-1 (rpm))
49.2 kW / 2700 min-1 (rpm)
(66.0 HP / 2700 min-1 (rpm))
Maximum Bare Speed 2920 min-1 (rpm)
Minimum Bare Idling Speed 825 to 875 min-1 (rpm)
Combustion Chamber Reentrant Type, Center Direct Injection Type (E-CDIS)
Fuel Injection Pump Bosch PFR4KZ Type Mini Pump
Governor All speed mechanical governor
Direction of Rotation Counter-clockwise (Viewed from flywheel side)
Injection Nozzle Bosch P Type
Injection Timing 0.0393 rad (2.25 ) before T.D.C.
[Serial No. : 8G0001 to 8V9999]
0.0044 rad (0.25 ) after T.D.C.
[Serial No. : 8W0001 and above]
0.0044 rad (0.25 ) before T.D.C.
Firing Order 1-3-4-2
Injection Pressure
1st stage 18.63 MPa
(190.0 kgf/cm2, 2702 psi),
2nd stage 21.57 MPa
(220.0 kgf/cm2, 3129 psi),
Compression Ratio 20.0 19.0
Lubricating System Forced lubrication by trochoid pump
Oil Pressure Indicating Electrical Type Switch
Lubricating Filter Full Flow Paper Filter (Cartridge Type)
Cooling System Pressurized radiator, forced circulation with water pump
Starting System Electric Starting with Starter
Starting Motor 12 V, 2.5 kW
Starting Support Device By Glow Plug in Combustion Chamber
EGR None External EGR (EGR Cooler + Mechanical water-
cooled EGR Valve + Reed Valve)
Battery 12 V, 92 AH equivalent
Charging Alternator 12 V, 540 W
Fuel Recommended fuels vary depending on the contents of the emission control regulations, the ambient
temperature, and the fuel specifications. Therefore, please refer to the detailed description on page G-6.
Lubricating Oil Class CF lubricating oil as per API classification is recommended.
For details on recommended lubricating oils, see page G-6 and page G-9.
Lubricating Oil Capacity 10.2 L (2.69 U.S.gals)
Weight (Dry) 225 kg (496 lbs) 235 kg (518 lbs)
KiSC issued 06, 2020 A

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07-E3B SERIES, WSM SPECIFICATIONS
* The specification described above is of the standard engine of each model.
* Conversion Formula : HP = 0.746 kW, PS = 0.7355 kW
W1028103
Model V3007-DI-T-E3B V3307-DI-T-E3B
Number of Cylinder 4
Type Vertical, water-cooled, 4-cycle DI diesel engine
Bore Stroke 94.0 110 mm (3.70 4.33 in.) 94.0 120 mm (3.70 4.72 in.)
Total Displacement 3053 cm3(186.3 cu.in.) 3331 cm3(203.3 cu.in.)
ISO Net Continuous 39.8 kW / 2600 min-1 (rpm)
(53.4 HP / 2600 min-1 (rpm))
45.6 kW / 2600 min-1 (rpm)
(61.2 HP / 2600 min-1 (rpm))
ISO / SAE Net Intermittent 46.9 kW / 2600 min-1 (rpm)
(62.9 HP / 2600 min-1 (rpm))
53.7 kW / 2600 min-1 (rpm)
(72.0 HP / 2600 min-1 (rpm))
SAE Gross Intermittent 48.5 kW / 2600 min-1 (rpm)
(65.0 HP / 2600 min-1 (rpm))
55.4 kW / 2600 min-1 (rpm)
(74.3 HP / 2600 min-1 (rpm))
Maximum Bare Speed 2820 min-1 (rpm)
Minimum Bare Idling Speed 775 to 825 min-1 (rpm)
Combustion Chamber Reentrant Type, Center Direct Injection Type (E-CDIS)
Fuel Injection Pump Bosch PFR4KZ Type Mini Pump
Governor All speed mechanical governor
Direction of Rotation Counter-clockwise (Viewed from flywheel side)
Injection Nozzle Bosch P Type
Injection Timing 0.010 rad (0.60 ) after T.D.C. 0.023 rad (1.3 ) after T.D.C.
Firing Order 1-3-4-2
Injection Pressure 1st stage 18.63 MPa (190.0 kgf/cm2, 2702 psi),
2nd stage 22.56 MPa (230.0 kgf/cm2, 3271 psi),
Compression Ratio 20.0
Lubricating System Forced lubrication by trochoid pump
Oil Pressure Indicating Electrical Type Switch
Lubricating Filter Full Flow Paper Filter (Cartridge Type)
Cooling System Pressurized radiator, forced circulation with water pump
Starting System Electric Starting with Starter
Starting Motor 12 V, 3.0 kW
Starting Support Device By Glow Plug in Combustion Chamber
EGR External EGR (EGR Cooler + Mechanical water-cooled EGR Valve + Reed Valve)
Battery 12 V, 120 AH equivalent
Charging Alternator 12 V, 540 W
Fuel Recommended fuels vary depending on the contents of the emission control regulations, the ambient
temperature, and the fuel specifications. Therefore, please refer to the detailed description on page G-6.
Lubricating Oil Class CF lubricating oil as per API classification is recommended.
For details on recommended lubricating oils, see page G-6 and page G-9.
Lubricating Oil Capacity 11.2 L (2.96 U.S.gals)
Weight (Dry) 263 kg (580 lbs) 275 kg (606 lbs)
KiSC issued 06, 2020 A

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07-E3B SERIES, WSM PERFORMANCE CURVES
PERFORMANCE CURVES
V2607-DI-E3B
(1) Brake Horsepower
(2) Engine Speed
(3) B.S.F.C.
(4) Torque
(5) Gross Intermittent Torque
(6) Gross Intermittent B.H.P.
(7) Gross Intermittent B.S.F.C.
KiSC issued 06, 2020 A