Kubota WG1605-G-E3, WG1605-L-E3, WG1605-N-E3, WG1605-LN-E3, WG1605-GLN-E3 Workshop Manual
...
WORKSHOP MANUAL
KiSC issued 05, 2014 A
GASOLINE,LPG,
NATURAL GAS ENGINE
WG1605-E3
TO THE READER
KiSC issued 05, 2014 A
This Workshop Manual tells the servicing personnel about the mechanism, servicing and
maintenance of the WG1605-E3. It contains 4 parts: "Information", "General", "Mechanism" and
"Servicing".
Information
This section contains information below.
• Safety First
• Specification
• Important Items of Exhaust Emission Regulation
• Performance Curve
• Dimension
• Wiring Diagram
General
This section contains information below.
• Engine Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
• Special Tools
Mechanism
This section contains information on the structure and the function of the unit. Before you continue
with the subsequent sections, make sure that you read this section.
Servicing
This section contains information below.
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing
All illustrations, photographs and specifications contained in this manual are of the newest
information available at the time of publication.
KUBOTA reserves the right to change all information at any time without notice.
Since this manual includes many models, information or illustrations and photographs can show
more than one model.
January, 2012
© KUBOTA Corporation 2012
Record of Revisions
KiSC issued 05, 2014 A
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}
2 2014.05 Added the models
(WG1605-N-E3, WG1605-LN-E3, WG1605-GLN-E3)
Reference
Page
–
I INFORMATION
KiSC issued 05, 2014 A
INFORMATION
KiSC issued 05, 2014 A
CONTENTS
1. SAFETY FIRST .............................................................................................................................. I-1
2. SPECIFICATIONS.......................................................................................................................... I-4
3. IMPORTANT ITEMS OF EXHAUST EMISSION REGULATION.................................................... I-8
[1] THREE-WAY CATALYST ........................................................................................................ I-9
[2] VAPORIZER AND LOCK OFF VALVE
(WG1605-L-E3, WG1605-N, WG1605-GL-E3, WG1605-LN-E3, WG1605-GLN-E3)............... I-9
[3] LENGTH OF THE VAPOR HOSE
(WG1605-L-E3, WG1605-N, WG1605-GL-E3, WG1605-LN-E3, WG1605-GLN-E3).............. I-9
[4] IMPORTANT NOTICE .............................................................................................................. I-9
[5] EMISSION-RELATED INSTALLATION INSTRUCTIONS........................................................ I-9
(1) Exhaust System.................................................................................................................. I-9
(2) Intake System..................................................................................................................... I-9
(3) Crankcase Ventilation Connections.................................................................................... I-9
(4) Gasoline Fuel System ........................................................................................................ I-9
(5) Gaseous Fuel System ...................................................................................................... I-10
(6) Engine Control Unit (ECU) ............................................................................................... I-10
(7) Vehicle Interface Connectors ........................................................................................... I-10
(8) Malfunction Indicator Light (MIL) ...................................................................................... I-10
4. PERFORMANCE CURVES .......................................................................................................... I-11
5. DIMENSIONS ............................................................................................................................... I-12
6. WIRING DIAGRAM....................................................................................................................... I-14
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
SAFETY FIRST
DANGER
WARNING
CAUTION
IMPORTANT
NOTE
KiSC issued 05, 2014 A
INFORMATION
1. 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 try to repair or use this
unit.
• Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
• Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
• Indicates that equipment or property damage could result if instructions are not followed.
• Gives helpful information.
WSM000001INI0001US1
BEFORE YOU START SERVICE
• 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 stable and level ground.
• Let the temperature of the engine decrease before
you start a job.
• Stop the engine, then remove the key.
• Disconnect the battery negative cable.
• Hang a "DO NOT OPERATE" tag in the operator
station.
WSM000001INI0002US0
START SAFELY
• Do not do the procedures below when you start the
engine.
– short across starter terminals
– bypass the safety start switch
• Do not make unauthorized modifications to the
engine. This can cause damage and decrease the
engine life.
WSM000001INI0003US0
I-1
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
OPERATE SAFELY
• Do not use the machine after you consume alcohol
or medication or when you are tired.
• Put on applicable clothing and safety equipment.
• Use applicable tools only. Do not use alternative
tools or parts.
• When 2 or more persons do servicing, make sure
that you do it safely.
• Do not touch the hot parts or parts that turn when the
engine operates.
• Do not remove the radiator cap when the engine
operates, or immediately after it stops. If not, hot
water can spout out from the radiator. Only remove
the radiator cap when it is at a sufficiently low
temperature to touch with bare hands. Slowly loosen
the cap to release the pressure before you remove it
fully.
• Released fluid (fuel or hydraulic oil) under pressure
can cause damage to the skin and cause serious
injury. Release the pressure before you disconnect
hydraulic or fuel lines. Tighten all connections before
you apply the pressure.
• Do not open a fuel system under high pressure.
The fluid under high pressure that stays in fuel lines
can cause serious injury. Do not disconnect or repair
the fuel lines, sensors, or any other components
between the fuel pump and injectors on engines with
a common rail fuel system under high pressure.
• Put on an applicable ear protective device (earmuffs
or earplugs) to prevent injury against loud noises.
9Y1210661INI0015US0
PREVENT A FIRE
• Fuel is very flammable and explosive under some
conditions. Do not smoke or let flames or sparks in
your work area.
• To prevent sparks from an accidental short circuit,
always disconnect the battery negative cable first
and connect it last.
• The battery gas can cause an explosion. Keep the
sparks and open flame away from the top of battery,
especially when you charge the battery.
• Make sure that you do not spill fuel on the engine.
WSM000001INI0005US0
KEEP A GOOD AIRFLOW IN THE WORK AREA
• If the engine is in operation, make sure that the area
has good airflow. Do not operate the engine in a
closed area. The exhaust gas contains poisonous
carbon monoxide.
WSM000001INI0006US0
I-2
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
DISCARD FLUIDS CORRECTLY
• Do not discard fluids on the ground, down the drain,
into a stream, pond, or lake. Obey related
environmental protection regulations when you
discard oil, fuel, coolant, electrolyte and other
dangerous waste.
WSM000001INI0007US0
PREVENT ACID BURNS
• Keep electrolyte away from your eyes, hands and
clothing. Sulfuric acid in battery electrolyte is
poisonous and it can burn your skin and clothing and
cause blindness. If you spill electrolyte on yourself,
clean yourself with water, and get medical aid
immediately.
WSM000001INI0008US0
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher ready at all
times.
• Keep the emergency contact telephone numbers
near your telephone at all times.
WSM000001INI0009US0
I-3
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
2. SPECIFICATIONS
INFORMATION
Model
WG1605-G-E3 WG1605-L-E3
Gasoline fuel LPG fuel
Number of Cylinder 4
Type
Vertical, water cooled,
4-cycle Gasoline engine
Vertical, water cooled,
4-cycle LPG engine
Bore × Stroke 79.0 × 78.4 mm (3.11 × 3.09 in.)
Total Displacement 1.537 L (93.79 cu.in.)
-1
SAE Gross Intermittent
ISO / SAE Net Intermittent
ISO Net Continuous
Maximum Bare Speed
42.5 kW (57.0 HP) / 3600 min
37.0 kW (49.6 HP) / 3000 min
38.5 kW (51.6 HP) / 3600 min
33.5 kW (44.9 HP) / 3000 min
30.8 kW (41.3 HP) / 3600 min
26.8 kW (35.9 HP) / 3000 min
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
3575 to 3625 min
2975 to 3025 min
Minimum Bare Idling Speed 725 to 775 min
41.0 kW (55.0 HP) / 3600 min
36.0 kW (48.3 HP) / 3000 min
37.1 kW (49.8 HP) / 3600 min
32.5 kW (43.6 HP) / 3000 min
29.7 kW (39.8 HP) / 3600 min
26.1 kW (35.0 HP) / 3000 min
-1
(rpm)
-1
(rpm)
-1
(rpm)
Cylinder Head Overhead-Valve
Ignition System Full Transistor Battery Ignition Type
Governor Electronic Governor
Direction of Rotation Counter-Clockwise (Viewed from Flywheel Side)
Spark Plug Type / Spark Plug Gap NGK IFR6F8DN 0.70 to 0.80 mm (0.028 to 0.031 in.)
0.35 rad (20 °) before T.D.C. /
-1
3000 min
750 min
(rpm), 3600 min-1 (rpm)
0.17 rad (10 °) before T.D.C. /
-1
(rpm), 800 min-1 (rpm)
Ignition Timing
0.45 rad (26 °) before T.D.C. /
-1
3000 min
750 min
(rpm), 3600 min-1 (rpm)
0.17 rad (10 °) before T.D.C. /
-1
(rpm), 800 min-1 (rpm)
Firing Order 1-3-4-2
Compression Ratio 9.1: 1
Lubricating System Forced Lubrication by Trochoid Pump
Oil Pressure Indication 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, 1.0 kW
Battery 12 V, 52 AH or Equivalent
Charging Alternator 12 V, 480 W, 720 W
Fuel *Unleaded Automobile Gasoline Commercial LPG
Lubricating Oil Better than SL Class (API) SAE 10W-30
Lubricating Oil Capacity 6.0 L (1.6 U.S.gals)
Catalytic Muffler / Converter Three Way Catalyst
Weight (Dry) 119 kg (262 lbs) 120 kg (265 lbs)
Application General Power Source
*The specification described above is of the standard engine of each model.
*Conversion Formula: HP = 0.746 kW, PS = 0.7355 kW
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
*KUBOTA RECOMMENDED LPG FUEL SPECIFICATIONS
• Commercial Propane gas only.
• Equivalent to Propanes H-D-5 of GPA* standards.
(vol %)
C
3H8
≥ 90 % ≤ 5 % ≤ 2.5 % −
*GPA means Gas Processors Association (U.S.A.)
C3H
6
C4H
10
Others
I-4
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
Model
Gasoline fuel LPG fuel
WG1605-GL-E3
Number of Cylinder 4
Type Vertical, water cooled, 4-cycle Dual Fuel (Gasoline / LPG) engine
Bore × Stroke 79.0 × 78.4 mm (3.11 × 3.09 in.)
Total Displacement 1.537 L (93.79 cu.in.)
-1
SAE Gross Intermittent
ISO / SAE Net Intermittent
ISO Net Continuous
Maximum Bare Speed
42.5 kW (57.0 HP) / 3600 min
37.0 kW (49.6 HP) / 3000 min
38.5 kW (51.6 HP) / 3600 min
33.5 kW (44.9 HP) / 3000 min
30.8 kW (41.3 HP) / 3600 min
26.8 kW (35.9 HP) / 3000 min
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
3575 to 3625 min
2975 to 3025 min
Minimum Bare Idling Speed 725 to 775 min
41.0 kW (55.0 HP) / 3600 min
36.0 kW (48.3 HP) / 3000 min
37.1 kW (49.8 HP) / 3600 min
32.5 kW (43.6 HP) / 3000 min
29.7 kW (39.8 HP) / 3600 min
26.1 kW (35.0 HP) / 3000 min
-1
(rpm)
-1
(rpm)
-1
(rpm)
Cylinder Head Overhead-Valve
Ignition System Full Transistor Battery Ignition Type
Governor Electronic Governor
Direction of Rotation Counter-Clockwise (Viewed from Flywheel Side)
Spark Plug Type / Spark Plug Gap NGK IFR6F8DN 0.70 to 0.80 mm (0.028 to 0.031 in.)
0.35 rad (20 °) before T.D.C. /
-1
3000 min
750 min
(rpm), 3600 min-1 (rpm)
0.17 rad (10 °) before T.D.C. /
-1
(rpm), 800 min-1 (rpm)
Ignition Timing
0.45 rad (26 °) before T.D.C. /
-1
3000 min
750 min
(rpm), 3600 min-1 (rpm)
0.17 rad (10 °) before T.D.C. /
-1
(rpm), 800 min-1 (rpm)
Firing Order 1-3-4-2
Compression Ratio 9.1: 1
Lubricating System Forced Lubrication by Trochoid Pump
Oil Pressure Indication 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, 1.0 kW
Battery 12 V, 52 AH or Equivalent
Charging Alternator 12 V, 480 W, 720 W
Fuel *Unleaded Automobile Gasoline Commercial LPG
Lubricating Oil Better than SL Class (API) SAE 10W-30
Lubricating Oil Capacity 6.0 L (1.6 U.S.gals)
Catalytic Muffler / Converter Three Way Catalyst
Weight (Dry) 121 kg (267 lbs)
Application General Power Source
*The specification described above is of the standard engine of each model.
*Conversion Formula: HP = 0.746 kW, PS = 0.7355 kW
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
*KUBOTA RECOMMENDED LPG FUEL SPECIFICATIONS
• Commercial Propane gas only.
• Equivalent to Propanes H-D-5 of GPA* standards.
(vol %)
*GPA means Gas Processors Association (U.S.A.)
C
3H8
C3H
6
C4H
10
Others
≥ 90 % ≤ 5 % ≤ 2.5 % −
9Y1210661INI0001US0
I-5
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
Model
WG1605-N-E3 WG1605-LN-E3
Natural gas fuel Natural gas fuel LPG fuel
Number of Cylinder 4
Type Vertical, water cooled, 4-cycle natural gas engine
Vertical, water cooled,
4-cycle LPG gas engine
Bore × Stroke 79.0 × 78.4 mm (3.11 × 3.09 in.)
Total Displacement 1.537 L (93.79 cu.in.)
-1
SAE Gross Intermittent
ISO / SAE Net Intermittent
ISO Net Continuous
Maximum Bare Speed
38.4 kW (51.6 HP) / 3600 min
33.9 kW (45.4 HP) / 3000 min
34.8 kW (46.7 HP) / 3600 min
30.7 kW (41.1 HP) / 3000 min
27.8 kW (37.3 HP) / 3600 min
24.5 kW (32.9 HP) / 3000 min
3575 to 3625 min
2975 to 3025 min
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
Minimum Bare Idling Speed 725 to 775 min
-1
-1
-1
(rpm)
(rpm)
(rpm)
41.0 kW (55.0 HP) /
3600 min
36.0 kW (48.3 HP) /
3000 min
37.1 kW (49.8 HP) /
3600 min
32.5 kW (43.6 HP) /
3000 min
29.7 kW (39.8 HP) /
3600 min
26.1 kW (35.0 HP) /
3000 min
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
Cylinder Head Overhead-Valve
Ignition System Full Transistor Battery Ignition Type
Governor Electronic governor
Direction of Rotation Counter-Clockwise (Viewed from Flywheel Side)
Spark Plug Type / Spark Plug Gap NGK IFR6F8DN 0.70 to 0.80 mm (0.028 to 0.031 in.)
Ignition Timing
0.42 rad (24 °) before T.D.C / 3600 min
0.40 rad (23 °) before T.D.C / 3000 min
0.26 rad (15 °) before T.D.C / 750 min
-1
(rpm)
-1
-1
(rpm), 800 min-1 (rpm)
(rpm)
0.35 rad (20 °) before T.D.C. /
3000 min
3600 min
0.17 rad (10 °) before T.D.C. /
750 min
800 min
-1
(rpm),
-1
(rpm)
-1
(rpm),
-1
(rpm)
Firing Order 1-3-4-2
Compression Ratio 9.1: 1
Lubricating System Forced Lubrication by Trochoid Pump
Oil Pressure Indication 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, 1.0 kW
Battery 12 V, 52 AH or Equivalent
Charging Alternator 12 V, 480 W, 720 W
Fuel Natural Gas Commercial LPG
Lubricating Oil Better than SL Class (API) SAE 10W-30
Lubricating Oil Capacity 6.0 L (1.6 U.S.gals)
Catalytic Muffler / Converter Three Way Catalyst
Weight (Dry) 120 kg (265 lbs)
I-6
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
Model
Gasoline Natural gas fuel LPG fuel
WG1605-GLN-E3
Number of Cylinder 4
Type
Vertical, water cooled,
4-cycle gasoline engine
Vertical, water cooled,
4-cycle natural gas engine
Vertical, water cooled,
4-cycle LPG gas engine
Bore × Stroke 79.0 × 78.4 mm (3.11 × 3.09 in.)
Total Displacement 1.537 L (93.79 cu.in.)
SAE Gross Intermittent
ISO / SAE Net Intermittent
ISO Net Continuous
42.5 kW (57.0 HP) /
3600 min
37.0 kW (49.6 HP) /
3000 min
38.5 kW (51.6 HP) /
3600 min
33.5 kW (44.9 HP) /
3000 min
30.8 kW (41.3 HP) /
3600 min
26.8 kW (35.9 HP) /
3000 min
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
Maximum Bare Speed
Minimum Bare Idling Speed 725 to 775 min
38.4 kW (51.6 HP) /
3600 min
33.9 kW (45.4 HP) /
3000 min
34.8 kW (46.7 HP) /
3600 min
30.7 kW (41.1 HP) /
3000 min
27.8 kW (37.3 HP) /
3600 min
24.5 kW (32.9 HP) /
3000 min
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
3575 to 3625 min
2975 to 3025 min
-1
-1
-1
(rpm)
41.0 kW (55.0 HP) /
3600 min
36.0 kW (48.3 HP) /
3000 min
37.1 kW (49.8 HP) /
3600 min
32.5 kW (43.6 HP) /
3000 min
29.7 kW (39.8 HP) /
3600 min
26.1 kW (35.0 HP) /
3000 min
(rpm)
(rpm)
Cylinder Head Overhead-Valve
Ignition System Full Transistor Battery Ignition Type
Governor Electronic governor
Direction of Rotation Counter-Clockwise (Viewed from Flywheel Side)
Spark Plug Type / Spark Plug Gap NGK IFR6F8DN 0.70 to 0.80 mm (0.028 to 0.031 in.)
Ignition Timing
0.45 rad (26 °) before T.D.C. /
3000 min
3600 min
0.17 rad (10 °) before T.D.C. /
750 min
800 min
-1
(rpm),
-1
(rpm)
-1
(rpm),
-1
(rpm)
0.42 rad (24 °) before T.D.C /
3600 min
0.40 rad (23 °) before T.D.C /
3000 min
0.26 rad (15 °) before T.D.C /
750 min
800 min
-1
(rpm)
-1
(rpm)
-1
(rpm),
-1
(rpm)
0.35 rad (20 °) before T.D.C. /
3000 min
3600 min
0.17 rad (10 °) before T.D.C. /
750 min
800 min
Firing Order 1-3-4-2
Compression Ratio 9.1: 1
Lubricating System Forced Lubrication by Trochoid Pump
Oil Pressure Indication 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, 1.0 kW
Battery 12 V, 52 AH or Equivalent
Charging Alternator 12 V, 480 W, 720 W
Fuel
*Unleaded Automobile
Gasoline
Natural Gas Commercial LPG
Lubricating Oil Better than SL Class (API) SAE 10W-30
Lubricating Oil Capacity 6.0 L (1.6 U.S.gals)
Catalytic Muffler / Converter Three Way Catalyst
Weight (Dry) 120 kg (265 lbs)
Application General Power Source
9Y1210661INI0029US0
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm)
-1
(rpm),
-1
(rpm)
-1
(rpm),
-1
(rpm)
I-7
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
3. IMPORTANT ITEMS OF EXHAUST EMISSION REGULATION
WG1605 is available and unavailable in those countries.
kW, Disp. Model Type
WG1605-G-E3, WG1605-L-E3,
19 < P, 1.0 < L
WG1605-N-E3, WG1605-GL-E3,
WG1605-LN-E3, WG1605-GLN-E3
E3 Available Available Non-available
Current and future emission regulations.
Countries kW, disp. 2009 2010 2011 2012 2013 2014 2015 2016
CARB
USA
EPA
Canada 19 < P None
Japan 19 ≤ P < 560 HC/0.6 g/kWh, NO
EU 19 < P None
• *: with evaporative emission regulation
• **: See figure below
19 < P < 560
1.0 < L
19 < P ≤ 560
1.0 < L
2.7/4.4* ** 0.8/20.6*
2.7/4.4* **
/0.6 g/kWh, CO/20 g/kWh
x
North
America
Europe Japan
HC+NOx/CO (g/kWh)
9Y1210661INI0002US0
9Y1210661INI0017US0
I-8
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
[1] THREE-WAY CATALYST
A three-way catalyst is a catalyst that oxidizes HC to CO2 and H2O and also CO to CO2 respectively and at the
same time reduces NOx to N
The main basic component of an exhaust gas purification system that uses a three-way catalyst is feedback
control of air-fuel ratio by means of an O
characteristic with reference to the intake air-fuel ratio of the three-way catalyst.
KUBOTA engines have two kinds of catalytic devices, catalytic muffler and catalytic converter.
near the stoichiometric ratio.
2
sensor for the purpose of maximizing the emission purification efficiency
2
9Y1210661INI0004US0
[2] VAPORIZER AND LOCK OFF VALVE
(WG1605-L-E3, WG1605-N, WG1605-GL-E3, WG1605-LN-E3,
WG1605-GLN-E3)
Vaporizer requires a normally-closed electrically controlled fuel lock off valve that is close coupled to the vaporizer
and off when ignition switch is off or when the engine is not running normally (supplied from KUBOTA). In operation
without a lock off upstream the vaporizer will flow fuel with the engine off. The vaporizer is not a fuel shut-off safety
device.
9Y1210661INI0016US0
[3] LENGTH OF THE VAPOR HOSE
(WG1605-L-E3, WG1605-N, WG1605-GL-E3, WG1605-LN-E3,
WG1605-GLN-E3)
Vapor hose length must not exceed 700 mm (27.6 in), shorter is generally considered better. Care should be
taken with hose routing and length to minimize the affect on vaporizer vibration isolation. The metal reinforced hose
should not be used.
9Y1210661INI0007US0
[4] IMPORTANT NOTICE
These instructions are provided to the Final Engine Assemblers (FEA) who must ensure the engine, exhaust
system (catalyst), fuel system etc, are installed correctly in the engine's certified configuration.
Please make sure whether emission-related items are certain on application review.
(for EPA only)
Failing to follow these instructions when installing a certified engine in a piece of nonroad equipment violates
federal law (40 CFR 1068.105(b)), subject to fines or other penalties as described in the Clean Air Act.
The contractual agreement contract is necessary before mass-production.
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[5] EMISSION-RELATED INSTALLATION INSTRUCTIONS
(1) Exhaust System
KUBOTA supplies a certified catalyst. FEA must use a KUBOTA certified catalyst and assemble the exhaust
system parts according to the instructions.
No other catalyst is certified for use with WG1605 Engine. No Other Catalyst can be used.
FEA may only install the exhaust system parts confirmed at application review.
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(2) Intake System
To prevent decreases of engine output performance, intake resistance must be kept below a certain point.
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(3) Crankcase Ventilation Connections
Crankcase emissions may not be discharged directly into the ambient atmosphere throughout its useful life.
(40 CFR 1048.115 (a))
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(4) Gasoline Fuel System
standards of 40 CFR 1048.
If your equipment uses a volatile liquid fuel (such as gasoline), they must meet the evaporative emission
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I-9
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
INFORMATION
(5) Gaseous Fuel System
FEA must use only the vaporizer and the lock off valve KUBOTA offers and assemble the LPG fuel system parts
according to the instructions.
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(6) Engine Control Unit (ECU)
Installation must use all 4 of the vibration mounts.
ECU header pins must be horizontal or point downward.
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(7) Vehicle Interface Connectors
Vehicle interface connectors shall be connected with your wire harness.
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(8) Malfunction Indicator Light (MIL)
When the MIL goes on, it must display "Check Engine", "Service Engine Soon", or a similar message that EPA
approve. (40 CFR 1048.110 (b))
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I-10
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
4. PERFORMANCE CURVES
WG1605-G/L/GL/N-E3
INFORMATION
(1) Brake Horsepower
(2) Engine Speed
(3) Specific Fuel Consumption
(4) Torque
(5) Gross Intermittent Torque
(6) Gross Intermittent Brake
Horsepower
(7) Gross Intermittent Specific
Fuel Consumption
I-11
(a) Gasoline Use
(b) LP Gas Use
(c) Natural Gas Use
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WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
5. DIMENSIONS
WG1605-G-E3
INFORMATION
WG1605-L-E3, WG1605-N-E3, WG1605-LN-E3
9Y1210661INI0009US0
9Y1210661INI0010US0
I-12
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
WG1605-GL-E3, WG1605-GLN-E3
INFORMATION
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I-13
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
6. WIRING DIAGRAM
WG1605-G-E3
INFORMATION
I-14
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
WG1605-L-E3, WG1605-N-E3, WG1605-LN-E3
INFORMATION
I-15
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
WG1605-GL-E3, WG1605-GLN-E3
INFORMATION
I-16
G GENERAL
KiSC issued 05, 2014 A
GENERAL
KiSC issued 05, 2014 A
CONTENTS
1. ENGINE IDENTIFICATION .......................................................................................................... G-1
[1] ENGINE MODEL NAME, CODE NUMBER AND ENGINE SERIAL NUMBER ...................... G-1
[2] E3 ENGINE ............................................................................................................................ G-3
[3] CYLINDER NUMBER ............................................................................................................. G-4
[4] CATALYTIC MUFFLER / CONVERTER ................................................................................ G-5
2. GENERAL PRECAUTIONS.......................................................................................................... G-6
3. MAINTENANCE CHECK LIST ..................................................................................................... G-7
4. CHECK AND MAINTENANCE ..................................................................................................... G-8
[1] DAILY CHECK POINTS ......................................................................................................... G-8
[2] CHECK POINTS OF INTIAL 50 HOURS ............................................................................. G-11
[3] CHECK POINTS OF EVERY 50 HOURS ............................................................................ G-12
[4] CHECK POINTS OF EVERY 100 HOURS .......................................................................... G-13
[5] CHECK POINTS OF EVERY 200 HOURS .......................................................................... G-15
[6] CHECK POINTS OF EVERY 1000 HOURS ........................................................................ G-16
[7] CHECK POINTS OF EVERY 2000 HOURS ........................................................................ G-18
[8] CHECK POINTS OF EVERY 1 YEAR.................................................................................. G-18
[9] CHECK POINTS OF EVERY 2 YEARS ............................................................................... G-21
5. SPECIAL TOOLS ....................................................................................................................... G-25
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
GENERAL
1. ENGINE IDENTIFICATION
[1] ENGINE MODEL NAME, CODE NUMBER AND ENGINE SERIAL
NUMBER
When contacting the manufacture, always specify your engine
model name, code number and serial number.
The engine model, code number and its serial number need to
be identified before the engine can be serviced or parts replaced.
Engine Model Name and Number Label
The engine model name, the engine serial number and engine
code number are written in this label.
Engine Serial Number
The engine serial number is an identification number for the
engine.
It is marked after the engine model name.
It indicates the engine series, the production year and month,
and the lot number.
Engine Series
Number or
Alphabet
1 05 (include: WG) 6
2 V3 7 03 (include: WG)
308807
4 SM (include: WG) A EA, RK
5
Series
Air Cooled
Gasoline
Number or
Alphabet
B
Series
GZ, OC, AC, EA,
E
03 (KET
Production)
Production Year
Alphabet or
Number
1 2001 F 2015
2 2002 G 2016
3 2003 H 2017
4 2004 J 2018
5 2005 K 2019
6 2006 L 2020
7 2007 M 2021
8 2008 N 2022
9 2009 P 2023
A 2010 R 2024
B 2011 S 2025
C 2012 T 2026
D 2013 V 2027
E 2014
(1) Engine Model Name and Number
Label
Year
Alphabet or
Number
(2) Engine Serial Number
(To be continued)
Yea r
G-1
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
(Continued)
Production Month and Lot Number
Month Engine Lot Number
January A0001 ~ A9999 B0001 ~
February C0001 ~ C9999 D0001 ~
March E0001 ~ E9999 F0001 ~
April G0001 ~ G9999 H0001 ~
May J0001 ~ J9999 K0001 ~
June L0001 ~ L9999 M0001 ~
July N0001 ~ N9999 P0001 ~
August Q0001 ~ Q9999 R0001 ~
September S0001 ~ S9999 T0001 ~
October U0001 ~ U9999 V0001 ~
November W0001 ~ W9999 X0001 ~
December Y0001 ~ Y9999 Z0001 ~
* Alphabetical letters "I" and "O" are not used.
e.g. WG1605
(a)
(a) WG1605: Engine Model Name
(b) 1: Engine Series (WG1605 series)
(c) C: Production Year (2012)
(d) U: Production Month (October)
(e) 0001: Lot Number: (0001 ~ 9999 or A001 ~ Z999)
(b)C(c)U(d)
- 1
(e)
0001
GENERAL
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G-2
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
[2] E3 ENGINE
GENERAL
[Example: Engine Model Name:
WG1605-G/L/N/GL/LN/GLN-E3-XXXX]
The emission controls previously implemented in various
countries to prevent air pollution will be stepped up as Non-Road
Emission Standards continue to change. The timing or applicable
date of the specific Non-Road Emission regulations depends on the
engine displacement and output classification.
Over the past several years, KUBOTA has been supplying SI
engines that comply with regulations in the respective countries
affected by Non-Road Emission regulations. For KUBOTA Engines,
E3 will be the designation that identifies engine models affected by
the next emission phase (See the table below).
When servicing or repairing ###-E3 series engines, use only
replacement parts for that specific E3 engine, designated by the
appropriate E3 KUBOTA Parts List and perform all maintenance
services listed in the appropriate KUBOTA Operator's Manual or in
the appropriate E3 KUBOTA Workshop Manual. Use of incorrect
replacement parts or replacement parts from other emission level
engines (for example: E2 engines), may result in emission levels out
of compliance with the original E3 design and EPA or other
applicable regulations. Please refer to the emission label located on
the engine head cover to identify Engine Displacement and Output
classification and Emission Control Information. E3 engines are
identified with "ET" at the end of the Model designation, on the US
EPA label. Please note: E3 is not marked on the engine.
Category (1) Displacement and Output classification EPA Regulation
ET
Label / Family Name:
#KBXB#######
Phase 3
(1) "E3" engines are identified with "ET" at the end of the Model designation, on
the US EPA label.
"E3" designates Phase 3 / Tier 3 models, depending on engine displacement
and output classification.
[A] WG1605-G-E3
[B] WG1605-L-E3
[C] WG1605-GL-E3
[D] WG1605-N-E3
(To be continued)
G-3
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
(Continued)
GENERAL
(1) "E3" engines are identified with "ET" at the end of the Model designation, on
the US EPA label.
"E3" designates Phase 3 / Tier 3 models, depending on engine displacement
and output classification.
[E] WG1605-LN-E3
[F] WG1605-GLN-E3
9Y1210661GEG0037US0
[3] CYLINDER NUMBER
The cylinder numbers of KUBOTA gasoline, gasoline / LPG and
natural gas engine are designated as shown in the figure.
The sequence of cylinder numbers is given as No.1, No.2, No.3
and No.4 starting from the gear case side.
9Y1210661GEG0006US0
G-4
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
NOTE
IMPORTANT
KiSC issued 05, 2014 A
[4] CATALYTIC MUFFLER / CONVERTER
KUBOTA provides the catalytic muffler and converter as the
catalyst parts.
The parts number, the manufacturing date and the catalyst lot
number are marked on surfaces of the catalyst parts as the catalyst
identification.
• New service catalytic muffler has the bar code tag of the
catalyst identification as the figure.
• To trace of the catalytic muffler / converter, put down the
catalyst identification and engine identification when new
service catalytic muffler / converter is installed.
(1) Part Number
(2) Manufacturing Date 5 digits
(3) Catalyst Lot Number 4 digits
(4) Date / Serial Number
GENERAL
[A] CATALYTIC MUFFLER
[B] CATALYTIC CONVERTER
9Y1210661GEG0038US0
G-5
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
KiSC issued 05, 2014 A
2. GENERAL PRECAUTIONS
• During disassembly, carefully arrange removed parts in a clean
area to prevent confusion later. Screws, bolts and nuts should
be replaced 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 live wires, make sure to
always disconnect the grounding cable from the battery first.
• Remove oil and dirt from parts before measuring.
• Use only KUBOTA genuine parts for parts replacement to keep
engine performance and to ensure safety.
• Gaskets and O-rings must be replaced during reassembly.
Apply grease to new O-rings or oil seals before assembling.
• When reassembling external or internal snap rings, position
them so that sharp edge faces against the direction from which
a force is applied.
• Be sure to perform run-in the serviced or reassemble engine.
Do not try to give heavy load at once, or serious damage may
result to the engine.
(1) Grease
(2) Force
(3) Place the Sharp Edge the Direction
of Force
GENERAL
(A) External Snap Ring
(B) Internal Snap Ring
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G-6
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
CAUTION
KiSC issued 05, 2014 A
GENERAL
3. MAINTENANCE CHECK LIST
To keep long-lasting and safe engine performance, make it a rule to do regular inspections by following the table
below. (The schedule applies to an engine in use under normal conditions.)
[WG1605-E3]
Service Interval
Item
Checking engine oil level
Checking and fill coolant
Checking air cleaner element
Cleaning air cleaner element
Checking LPG / natural gas tank setting
condition
Checking LPG / natural gas fuel connector
Changing engine oil
Replacing oil filter cartridge
Checking gasoline fuel hose and clamp
bands
Checking LPG / natural gas fuel hose and
clamp bands
Cleaning spark plug
Checking fuel filter
Check fan belt tension and damage
Checking battery electrolyte level
Replacing fuel filter
Checking LPG / natural gas tank setting
condition
Checking radiator hoses and clamp bands
Checking PCV valve
Checking coolant hose of LPG / natural gas
vaporizer
Checking LPG / natural gas Lock off valve
Checking valve clearance
Replacing spark plug
* Replacing air cleaner element
Replacing gasoline fuel hose, clamp bands
and fuel filter
Cleaning fuel tank inside (for gasoline fuel)
Cleaning water jacket and radiator interior
Replacing intake air line
Replacing breather hose
Replacing LPG / natural gas fuel hose and
clamp bands
Replacing coolant hose of LPG / natural
gas vaporizer
** Checking LPG / natural gas vaporizer
Replacing radiator hoses and clamp bands
Changing radiator coolant
Replacing battery
Every
8hrs
(Daily)
if
necessary
if
necessary
if
necessary
Every
50 hrs
(Weekly)
Every
100 hrs
if
necessary
Every
200 hrs
Every
1000 hrs
Every
2000 hrs
Every
1 year
2 years
Every
Change engine oil and replace oil filter cartridge after the first 50 hours of operation.
*: Change more often when operating under dusty conditions.
**: If you do not have the proper tools and / or are not mechanically proficient, contact your local KUBOTA dealer.
• When changing or inspecting, be sure to level and stop the engine.
9Y1210661GEG0008US0
G-7
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