Kubota WSM J Series Instruction manual

WORKSHOP MANUAL
DIESEL GENERATOR
J SERIES
KiSC issued 10, 2016 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of KUBOTA Generator J
Series. It is divided into two parts, “Mechanism” and “Servicing”.
Mechanism
Information on the construction and function are included. This part should be
understood before proceeding with troubleshooting, disassembling and servicing.
Servicing
Under the heading “General” comes general precautions, check and maintenance
and special tools. For each Engine and Generator section, there are troubleshooting,
servicing specification lists, 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, illustration being used, have not been
specified as one model.
October 2000
© KUBOTA Corporation 2000
KiSC issued 10, 2016 A

Record of Revisions
For pdf, use search function {Search word} to find all the revised locations.
Last digit
of the
Code No.
Issue
month Main Revised Point and Corrective Measures {Search word} Reference
Page
52016.10 AVR circuit changed. M-10 to
M-32
KiSC issued 10, 2016 A

1
SAFETY INSTRUCTIONS
J SERIES, WSM
SAFETY INSTRUCTIONS
BEFORE SERVICING AND REPAIRING
• Read all instructions and safety instructions in this
manual and on your generator safety decals.
• Clean the work area and generator.
• Place the generator 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.
SAFETY FIRST
This symbol, the industry’s “Safety Alert Symbol”, is used throughout this manual and decals on the
generator 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 10, 2016 A

2
J SERIES, WSM SAFETY INSTRUCTIONS
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals.
• Unauthorized modifications to the engine may impair
the function and / or safety and affect engine life.
SAFETY WORKING
• Do not work on the generator 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 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) under pressure can penetrate the
skin causing serious injury. Relieve pressure before
disconnecting 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.
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.
KiSC issued 10, 2016 A

3
SAFETY INSTRUCTIONS
J SERIES, WSM
VENTILATE WORK AREA
• If the generator 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.
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher handy at all
times.
• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.
KiSC issued 10, 2016 A

4
J SERIES, WSM SAFETY INSTRUCTIONS
The following safety decals are installed on the generator.
If a decal becomes damaged, illegible or is not on the generator, replace it.
The decal part number is listed in the parts list.
SAFETY DECALS

KiSC issued 10, 2016 A

5
SPECIFICATIONS
J SERIES, WSM
SPECIFICATIONS
[50Hz]
W10275180
Model J106 J108 J112 J116
-STD -AUS -STD -AUS -STD -AUS -STD -AUS
Generator
Type Revolving-field, brush type, separate and self - excitation system, AC generator
Insulation
class Rotor coil: F Stator coil: B
Frequency 50 Hz
Standby
output 6.0 kVA (6.0 kW) 8.8 kVA (8.8 kW) 13.2 kVA (13.2 kW) 17.6 kVA (17.6 kW)
Prime output 5.5 kVA (5.5 kW) 8.0 kVA (8.0 kW) 12 kVA (12 kW) 16 kVA (16 kW)
Voltage 220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V
Rated
amperage 25.0 A 22.9 A 36.4 A 33.3 A 54.5 A 50.0 A 72.7 A 66.7 A
Number of
phases Single
Number of
poles 2
Power factor 100 %
Engine
Model Z482-B-SEC D722-B-SEC D1005-BG-SEC V1305-BG-SEC
Design Vertical, liquid cooled, 4 cycle, diesel engine
Number of
cylinders 234
Bore x Stroke 67 x 68 mm (2.52 x 2.68 in.) 76 x 73.6 mm (2.99 x 2.90 in.)
Displacement 479 cm3(29.23 cu.in.) 719 cm3(43.89 cu.in.) 1001 cm3(61.08 cu.in.) 1335 cm3(81.46 cu.in.)
Combustion
system Spherical combustion chamber
Compression
ratio 23:1 22:1
Cooling
system Pressurized radiator, forced circulation with water pump
Lubricating
system Forced lubrication by trochoid pump
Lubricating oil Higher than CD class (API)
Starting
system Electric type
Stop solenoid Energized to stop Energized to run
Battery 38B20R 55B24R 80D26R (S)
Fuel tank
capacity
37 L
(9.8 U.S.gals, 8.1 Imp. gals.)
79 L
(20.9 U.S. gals, 17.4 Imp. gals.)
Cooling
system
capacity
2.3 L
(2.4U.S.qts.,2.0 Imp.qts.)
3.0L
(3.2U.S.qts.,2.6 Imp.qts.)
3.3 L
(3.5U.S.qts.,2.9 Imp.qts.)
3.5 L
(3.7U.S.qts.,3.1 Imp.qts.)
Crankcase oil
capacity
2.2 L
(2.3U.S.qts.,2.0 Imp.qts.)
3.4 L
(3.6U.S.qts.,3.0 Imp.qts.)
4.3 L
(4.6U.S.qts.,3.8 Imp.qts.)
5.7 L
(6.0U.S.qts.,5.0 Imp.qts.)
Continuous operating
hours (at 3/4 load) 19.0 Hr 13.5 Hr 20.0 Hr 16.5 Hr
Net weight 225 kg (496 lbs) 255 kg (562 lbs) 340 kg (750 lbs) 380 kg (838 lbs)
Emergency stop
mechanism
During engine operation, automatic shutdown will
occur when either the oil pressure or the water
temperature is abnormal.
During engine operation, automatic shutdown will
occur when either the oil pressure or the water
temperature is abnormal or when the fan belt breaks.
With Caster Option None
KiSC issued 10, 2016 A

6
J SERIES, WSM SPECIFICATIONS
W10308040
Model J310 J315 J320
-STD -AUS -STD -AUS -STD -AUS
Generator
Type Revolving-field, brush type, separate and self - excitation system, AC generator
Insulation
class Rotor coil: F Stator coil: B
Frequency 50 Hz
Standby
output 11 kVA (8.8 kW) 16.5 kVA (13.2 kW) 22 kVA (17.6 kW)
Prime output 10 kVA (8 kW) 6 kVA
(6 kW) 15 kVA (12 kW) 9 kVA (9 kW) 20 kVA (16 kW) 10.8 kVA (10.8 kW)
Voltage 380 V 415 V 240 V 380 V 415 V 240 V 380 V 415 V 240 V
Rated
amperage 15.2 A 13.9 A 8.3 x 3 A 22.8 A 20.9 A 12.5 x 3 A 30.4 A 27.8 A 15 x 3 A
Number of
phases Three
Number of
poles 2
Power factor 80 % 100 % 80 % 100 % 80 % 100 %
Engine
Model D722-B-SEC D1005-BG-SEC V1305-BG-SEC
Design Vertical, liquid cooled, 4 cycle, diesel engine
Number of
cylinders 34
Bore x Stroke 67 x 68 mm (2.52 x 2.68 in.) 76 x 73.6 mm (2.99 x 2.90 in.)
Displacement 719 cm3(43.89 cu.in.) 1001 cm3(61.08 cu.in.) 1335 cm3(81.46 cu.in.)
Combustion
system Spherical combustion chamber
Compression
ratio 23:1 22:1
Cooling
system Pressurized radiator, forced circulation with water pump
Lubricating
system Forced lubrication by trochoid pump
Lubricating oil Higher than CD class (API)
Starting
system Electric type
Stop solenoid Energized to stop Energized to run
Battery 55B24R 80D26R (S)
Fuel tank
capacity
37 L
(9.8U.S.gals., 8.1 Imp. gals.)
79 L
(20.9U.S.gals., 17.4 Imp.gals.)
Cooling
system
capacity
3.0 L
(3.2U.S.qts., 2.6 Imp.qts.)
3.3 L
(3.5U.S.qts., 2.9 Imp.qts.)
3.5 L
(3.7U.S.qts., 3.1 Imp.qts.)
Crankcase oil
capacity
3.4 L
(3.6U.S.qts., 3.0 Imp.qts.)
4.3 L
(4.6U.S.qts., 3.8 Imp.qts.)
5.7 L
(6.0U.S.qts., 5.0 Imp.qts.)
Continuous operating
hours (at 3/4 load) 13.5 Hr 20.0 Hr 16.5 Hr
Net weight 255 kg (562 lbs) 340 kg (750 lbs) 380 kg (838 lbs)
Emergency stop
mechanism
During engine operation,
automatic shutdown will occur
when either the oil pressure or
the water temperature is
abnormal.
During engine operation, automatic shutdown will occur when either the oil
pressure or the water temperature is abnormal or when the fan belt breaks.
With Caster Option None
KiSC issued 10, 2016 A

7
SPECIFICATIONS
J SERIES, WSM
[60Hz]
W10439640
Model J107 J110 J114 J119
-STD -SA -STD -SA -STD -SA -STD -SA
Generator
Type Revolving-field, brush type, separate and self - excitation system, AC generator
Insulation
class Rotor coil: F Stator coil: B
Frequency 60 Hz
Standby
output 7.1 kVA (7.1 kW) 11.0 kVA (11.0 kW) 15.4 kVA (15.4 kW) 20.6 kVA (20.6 kW)
Prime output
6.5 kVA (6.5 kW) 10 kVA (10 kW) 14 kVA
(14 kW)
11.5 kVA
(11.5 kW) /
14 kVA
(14 kW)
18.8 kVA
(18.8 kW)
11.5 kVA
(11.5 kW) /
18.8 kVA
(18.8 kW)
Voltage 110 / 220V 127 / 220V 110 / 220V 127 / 220V 110 / 220V 127 / 220V 110 / 220V 127 / 220V
Rated
amperage
59.1 /
29.5A
51.2 /
29.5A
90.9 /
45.5A
78.7 /
45.5A
63.6 x 2 /
63.6 A
90.6 /
63.6A
85.5 x 2 /
85.5 A
90.6 /
85.5A
Number of
phases Single
Number of
poles 2
Power factor 100 %
Engine
Model Z482-B-SEC D722-B-SEC D1005-BG-SEC V1305-BG-SEC
Design Vertical, liquid cooled, 4 cycle, diesel engine
Number of
cylinders 234
Bore x Stroke 67 x 68 mm (2.52 x 2.68 in.) 76 x 73.6 mm (2.99 x 2.90 in.)
Displacement 479 cm3(29.23 cu.in.) 719 cm3(43.89 cu.in.) 1001 cm3(61.08 cu.in.) 1335 cm3(81.46 cu.in.)
Combustion
system Spherical combustion chamber
Compression
ratio 23:1 22:1
Cooling
system Pressurized radiator, forced circulation with water pump
Lubricating
system Forced lubrication by trochoid pump
Lubricating oil Higher than CD class (API)
Starting
system Electric type
Stop solenoid Energized to stop Energized to run
Battery 38B20R 55B24R 80D26R (S)
Fuel tank
capacity
37 L
(9.8U.S.gals., 8.1 Imp.gals.)
79 L
(20.9U.S.gals.,17.4 Imp.gals.)
Cooling
system
capacity
2.3 L
(2.4U.S.qts.,2.0 Imp.qts.)
3.0 L
(3.2U.S.qts.,2.6 Imp.qts.)
3.3 L
(3.5U.S.qts.,2.9 Imp.qts.)
3.5 L
(3.7U.S.qts.,3.1 Imp.qts.)
Crankcase oil
capacity
2.2 L
(2.3U.S.qts.,2.0 Imp.qts.)
3.4 L
(3.6U.S.qts.,3.0 Imp,qts.)
4.3 L
(4.6U.S.qts.,3.8 Imp.qts.)
5.7 L
(6.0U.S.qts.,5.0 Imp.qts.)
Continuous operating
hours (at 3/4 load) 15.5 Hr 10.5 Hr 16.0 Hr 13.0 Hr
Net weight 225 kg (496 lbs) 255 kg (562 lbs) 340 kg (750 lbs) 380 kg (838 lbs)
Emergency stop
mechanism
During engine operation, automatic shutdown will
occur when either the oil pressure or the water
temperature is abnormal.
During engine operation, automatic shutdown will
occur when either the oil pressure or the water
temperature is abnormal or when the fan belt breaks.
With Caster Option None
KiSC issued 10, 2016 A