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KX080-4
Workshop Manual
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Kubota KX080-4 Workshop Manual

WORKSHOP MANUAL
KiSC issued 08, 2015 A
KUBOTA EXCAVATOR
KX080-4

CONTENTS

KiSC issued 08, 2015 A
TO THE READER
TO THE READER
I INFORMATION
1. SAFETY FIRST ............................................ I-1
2. IN THE INTEREST OF WORK
SAFETY........................................................ I-2
3. LABELS DISPLAYED TO PROMOTE
WORK SAFETY............................................ I-6
4. MAIN SPECIFICATIONS ............................ I-12
5. DIMENSIONS ............................................. I-13
G GENERAL
1. CHECKING EXCAVATOR
IDENTIFICATION ........................................G-1
2. ENGINE IDENTIFICATION .........................G-2
3. MUFFLER FULL ASSEMBLY
IDENTIFICATION ........................................G-5
4. GENERAL PRECAUTIONS.........................G-7
5. HANDLING PRECAUTIONS FOR
ELECTRICAL PARTS AND WIRING.........G-11
6. TIGHTENING TORQUES ..........................G-16
7. OIL AND WATER CAPACITY TABLE .......G-20
8. MAINTENANCE INTERVALS....................G-21
1 MACHINE BODY
1. FRONT ...................................................... 1-S1
2. SWIVEL FRAME........................................ 1-S8
3. TRACK FRAME ....................................... 1-S22
4. MEASURING MACHINE
PERFORMANCE ..................................... 1-S38
5. SWIVEL GEAR BACKLASH
PERFORMANCE ..................................... 1-S40
2 ENGINE
1. SPECIFICATIONS.....................................2-G1
2. DIMENSIONS ............................................2-G2
3. PERFORMANCE CURVES .......................2-G3
4. FAN DRIVE................................................2-G4
3 HYDRAULIC SYSTEM
1. DIAGRAM OF HYDRAULIC CIRCUIT...... 3-M1
2. HYDRAULIC DEVICE LAYOUT ............... 3-M3
3. PUMP ....................................................... 3-M4
4. CONTROL VALVE.................................. 3-M12
5. SWIVEL MOTOR.................................... 3-M29
6. TRAVEL MOTOR ................................... 3-M34
7. HYDRAULIC CYLINDER ........................ 3-M39
8. PILOT VALVE......................................... 3-M42
9. SHOCKLESS VALVES........................... 3-M52
10. SOLENOID VALVE................................. 3-M54
SERVICING
1. PUMP......................................................... 3-S1
2. CONTROL VALVE................................... 3-S17
3. SWIVEL MOTOR ..................................... 3-S26
4. SWIVEL JOINT ........................................ 3-S41
5. TRAVEL MOTOR..................................... 3-S49
6. CYLINDER............................................... 3-S69
7. PILOT VALVE .......................................... 3-S71
8. SHOCKLESS VALVES .......................... 3-S106
9. SWIVEL SHUTTLE VALVE ................... 3-S107
10. SOLENOID VALVE ................................ 3-S108
11. ROUTING OF HYDRAULIC HOSES .....3-S112
12. MEASURING HYDRAULIC DEVICE
PERFORMANCE ................................... 3-S133
13. HYDRAULIC DEVICE
PERFORMANCE STANDARDS............ 3-S158
14. TROUBLESHOOTING ........................... 3-S165
4 ELECTRICAL SYSTEM
1. LAYOUT OF ELECTRICAL DEVICES
AND WIRING ROUTING ........................... 4-S1
2. METER PANEL OPERATION ................. 4-S10
3. INSPECTIONS......................................... 4-S44
4. TROUBLESHOOTING (START-UP
EQUIPMENT VERSION) .........................4-S50
5. METHODS FOR DIAGNOSING
ERRORS.................................................. 4-S51
6. TROUBLESHOOTING (METER
PANEL VERSION)................................... 4-S53
5 CABIN
1. AIR CONDITIONING SYSTEM................. 5-M1
2. WIPER .................................................... 5-M17
SERVICING
1. TROUBLESHOOTING............................... 5-S1
2. SERVICE SPECIFICATIONS .................... 5-S4
3. TORQUE.................................................... 5-S5
4. PRECAUTIONS WHEN REPAIRING
THE REFRIGERANT SYSTEM ................. 5-S6
5. INSPECTING AND CHARGING THE
REFRIGERANT SYSTEM ....................... 5-S11
6. INSPECTION AND DISASSEMBLY ........5-S20
7. WINDOW WASHER ................................ 5-S36
8. CABIN GLASS REMOVAL AND
MOUNTING ............................................. 5-S38
9. REMOVAL AND INSTALLATION OF
GLASS ..................................................... 5-S52
10. FRONT WINDOW .................................... 5-S57

TO THE READER

NOTE
IMPORTANT
KiSC issued 08, 2015 A
This Workshop Manual provides service personnel with information about the mechanisms, service and maintenance of the construction machinery. This Workshop Manual is divided into 3 sections, General, Mechanisms and Service.
General
This section contains information such as engine and equipment ID numbers, general precautions, maintenance schedules, inspections and maintenance items and special tools.
Mechanisms
This section describes the structure of mechanisms and explains their functions.Be sure that you fully understand this Mechanisms section prior to performing any service work, such as troubleshooting or when performing any disassembly or assembly work.
Service
This section contains information and procedures for performing maintenance on the backhoe, such as troubleshooting, service specification tables, torque specifications, items to be inspected and adjusted, disassembly and assembly procedures, as well as precautions, maintenance standard values and usage limits.
All of the illustrations, specifications and other information in this manual were created based on the latest model at the time of publication.
Please be aware that changes to the content may be made without prior notice.
• Corresponding model list
Machine Model Engine Model
KX080-4 V3307-CRS-T4
• Refer to the information of the engine below.
• Engine model : V2607-CR-E4B, V2607-CR-TE4B, V3307-CR-TE4B
• Web PDF-Code : No.9Y111-06740
• Hard Copy-Code : No.9Y121-06740
• CD-ROM-Code : No.9Y131-06740
© KUBOTA Corporation 2013
January, 2013
Record of Revisions
KiSC issued 08, 2015 A
Last digit of
the Code
No.
Date Main Revised Point and Corrective Measures Remarks
1 2015.08.05
2
3
4
• Add the contents of pump assembly and disassembly, the contents of cabin glass removal and mounting.
S. M

I INFORMATION

KiSC issued 08, 2015 A

INFORMATION

KiSC issued 08, 2015 A
CONTENTS
1. SAFETY FIRST .............................................................................................................................. I-1
2. IN THE INTEREST OF WORK SAFETY ........................................................................................ I-2
[1] WORKING SAFELY WITH THE EQUIPMENT MEANS ALWAYS FOLLOWING
THESE INSTRUCTIONS:......................................................................................................... I-2
(1) Precautions Before Working on the Machine ..................................................................... I-2
(2) Precautions Before Working on the Equipment.................................................................. I-3
3. LABELS DISPLAYED TO PROMOTE WORK SAFETY................................................................. I-6
[1] LOCATIONS ............................................................................................................................. I-6
[2] LABEL MAINTENANCE ......................................................................................................... I-11
4. MAIN SPECIFICATIONS.............................................................................................................. I-12
5. DIMENSIONS ............................................................................................................................... I-13
KX080-4, WSM
SAFETY FIRST
DANGER
WARNING
CAUTION
IMPORTANT
NOTE
KiSC issued 08, 2015 A
INFORMATION

1. SAFETY FIRST

• This "Safety Alert Symbol" is used in this manual and on labels on equipment to indicate important issues and warn of the danger of personal injury. Read and follow these warnings carefully.
• It is important that you thoroughly read these instructions and safety rules prior to working on the equipment and that you always follow them.
• Indicates that failure to follow the warning will result in serious injury or death.
• Indicates that failure to follow the warning may result in serious injury or death.
• Indicates that failure to follow the warning may result in injury.
• Indicates that failure to follow the warning may result in damage to or a breakdown of the equipment.
• Indicates supplementary explanations that will be helpful when using the equipment.
[NOTE]
• Indicates other supplementary information to take note of.
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION

2. IN THE INTEREST OF WORK SAFETY

[1] WORKING SAFELY WITH THE EQUIPMENT MEANS ALWAYS
FOLLOWING THESE INSTRUCTIONS:
(1) Precautions Before Working on the Machine
Before starting any service or maintenance work
• Read all the general and safety instructions in this manual, as well as the decals on your equipment.
• Always stop the engine whenever you leave the driver's seat to inspect or clean the machine or its devices, or to inspect or adjust parts.
• Choose a safe spot for inspecting the equipment-on flat, hard ground.
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• When performing maintenance on the equipment, hang the DO NOT OPERATE sign where it will be obvious from and around the driver's seat.
• When performing maintenance or repairs, always lower attachments to the ground, stop the engine and set the brake.
• When performing maintenance on the equipment, always disconnect the negative battery cable.
• Before using tools, make sure you understand how to use them correctly and use tools in good condition and of the right size for the job.
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Be Ready for an Emergency
• Keep a first-aid kit and fire extinguisher close at hand so you can use it when needed.
• Keep emergency contact information for doctors, hospitals and ERs handy.
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• Wear clothes appropriate for working on equipment. Do not wear loose-fitting clothes as they may catch on the machine controls.
• When working on the equipment, use all safety gear, such as a helmet, safety glasses and shoes, that are required by law or regulation.
• Never perform maintenance while drowsy or under the influence of alcohol or drugs.
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CAUTION
KiSC issued 08, 2015 A
(2) Precautions Before Working on the Equipment
• Stop the machine on a hard and level location and make sure the area around the machine is free of obstacles and hazardous materials. When parking the machine indoors, select a spot that can be properly ventilated.
• When performing work such as with a hammer, fragments may go flying, so make sure only authorized persons are around the machine.
• Before servicing the machine, clean it off so there is no mud, debris, oil or the like sticking to it.
• Before getting on/off of the machine, clean off around the steps so there is no mud on them. Always give yourself 3-point support when getting on/off the machine.
• 3-point support means using both legs and one hand or both hands and one leg as you climb up/down.
INFORMATION
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Starting the Machine Safely
• Before starting the engine, always sit in the driver's seat and make sure the area is safe and clear.
• As it is dangerous, never start the engine from anywhere but the driver's seat.
• Always check and make sure control lever(s) are not engaged before starting the engine.
• Never start the engine by hot-wiring the starter circuit. This is not only dangerous, but may damage the machine.
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• Whenever it is necessary to open the engine covers or hood in order to service the machine, always prop them open.
• If it is absolutely necessary to run the engine while working on the machine, make sure you are clear of all rotating or moving parts. Also take care not to leave anything, such as tools or rags, near any moving parts.
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
• The engine, muffler, radiator, hydraulic line, etc., have parts that remain very hot even after the engine has been stopped. Be sure to avoid these parts, as touching them can result in burns. Radiator coolant, hydraulic fluid and oil also remain hot. Therefore, do not attempt to remove caps and plugs, etc., before these fluids have sufficiently cooled.
• Make sure the coolant temperature has dropped sufficiently before opening the radiator cap. Also, since the inside of the radiator is pressurized, when removing the cap, first loosen it to release the pressure before removing the cap completely.
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• The pressure in the hydraulic circuit stays at pressure even after the engine stops. Before removing parts, such as hydraulic devices from the machine, first release the pressure. Please note that when releasing residual pressure, the machine itself and/or implements may move without warning, so be very careful when releasing the pressure.
• Oil gushing out under pressure is extremely dangerous as it may pierce your skin or your eyes. Similarly, oil leaking out of pinholes is not visible. So when checking for oil leaks, always wear safety glasses and gloves and use a piece of cardboard or a wood block to shield yourself from oil.
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No Smoking or Open Flames while Fueling
• Fuel is extremely flammable and dangerous. Never smoke near fuel. If fuel is spilled on the machine, its engine, or electrical parts, it may cause a fire. If fuel is spilled, wipe it all up immediately.
• Never smoke while filling the machine with fuel. And always tighten the fuel cap securely and wipe up any spilled fuel.
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• Always wear safety glasses and gloves when handling the battery.
• The gas generated by the battery is flammable. Never weld or use tools like a grinder near the battery. And never smoke near it.
• When disconnecting the battery, always disconnect the negative cable first. When connecting the battery, always connect the positive cable first.
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
• Grease is under high pressure inside the hydraulic cylinder. It is very dangerous to loosen a grease nipple quickly as it may shoot off. Always loosen grease nipples slowly.
• And never face a grease nipple while loosening it.
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Dispose of Waste Fluids Properly
• Never dispose of waste fluids on the ground, in the gutter, a river, pond or lake. Always dispose of hazardous substances like waste oil, coolant and electrolytic fluid in accordance with the relevant environmental protection regulations.
• Keep the safety plates clean so they can be read. If a safety plate is damaged and comes off or becomes illegible, put a plate with the same warnings back in its place.
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I-5
KX080-4, WSM
KiSC issued 08, 2015 A

3. LABELS DISPLAYED TO PROMOTE WORK SAFETY

[1] LOCATIONS
INFORMATION
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
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I-8
KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
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KX080-4, WSM
KiSC issued 08, 2015 A
INFORMATION
[2] LABEL MAINTENANCE
Thoroughly Read, Understand and Follow Safety Precautions on Labels
• Always keep labels in a clean, undamaged state.
• If labels get dirty, wipe them off with soapy water and a soft cloth.
• When using a pressure washer to clean the equipment, do not spray any labels directly as doing so may make
• If a label is damaged or lost, order a new one from your dealer and affix it as before.
• Before affixing a new label, completely wipe off any dirt or grime on the surface, allow it to dry and then affix in
• When replacing a part that has a label on it, replace the label at the same time.
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If solvents such as paint thinner or engine oil are used, the text and or figures may fade away.
them peel off.
the same place.
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KX080-4, WSM
NOTE
KiSC issued 08, 2015 A
INFORMATION

4. MAIN SPECIFICATIONS

KUBOTA EXCAVATOR
Model name KX080-4
Type Cabin Angle Blade type Cabin
Rubber
Operating weight (including operator's weight)
tracks
8290 kg
18280 lbs
Type Water cooled 4 cycle diesel engine with 4 cylinder
Model name KUBOTA V3307-CRS-T4
Total displacement 3331 cc (203.3 cu.in.)
Engine
Engine power
SAE gross 52.2 kW (70.0 Hp)
SAE net 48.8 kW (65.5 Hp)
Rated speed 2000 rpm
Low idling speed 1000 rpm
Unit swing speed 9.5 rpm
Travel speed
Fast 4.9 km / h (3.1 mph)
Slow 2.7 km / h (1.7 mph)
36.0 kPa
Performance
Ground pressure (With operator)
(0.367
kgf/cm
5.22 psi
Climbing angle *36 % (20 deg)
Angle in case of crossing slope
Width x Height
Blade
Max swing
Left – 0.44 rad (25 deg)
Right – 0.44 rad (25 deg)
Left 1.22 rad (70 deg)
Boom swing angle
Right 1.05 rad (60 deg)
Max. displacement
Pressure
(Theoretical)
connection for attachments
Max. pressure
Fuel tank capacity 115 L (30.4 U.S.gal)
Steel tracks
(450 width)
8340 kg
18390 lbs
36.2 kPa (0.369
2
)
kgf/cm
5.25 psi
2200 x 500 mm
86.6 x 19.7 in.
Steel tracks
Rubber
(600 width)
8470 kg
18670 lbs
27.6 kPa (0.281
2
)
kgf/cm
2)
4.00 psi
8680 kg
19140 lbs
37.5 kPa (0.382
kgf/cm
5.44 psi
*27 % (15 deg)
100 L (26.4 U.S.gal) / min
20.6 MPa
210 kgf/cm
2
2987 psi
tracks
2
)
2200 x 510 mm
86.6 x 20.1 in.
Steel tracks
(450 width)
8730 kg
19250 lbs
37.7 kPa (0.384
kgf/cm
5.47 psi
2
)
• Above dimensions are based on the machine with KUBOTA original bucket and 2100 arm.
• Specifications subject to change without notice.
• With unloaded digging bucket.
• Firm compacted soil.
• Operators must exercise extra caution and follow instructions in the operator's manual.
• Worse condition or heavier attachment to the above will decrease climbing angle.
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KX080-4, WSM
KiSC issued 08, 2015 A

5. DIMENSIONS

INFORMATION
(1) Arm length (2100 Arm)
• Above dimensions are based on the machine with KUBOTA original bucket.
• Above dimensions are based on the machine with rubber track.
• Specifications subject to change without notice.
KX080-4
KX080-4
KX080-4
(A) (B) (C) (D) (E) (F) (G)
590 mm
23.2 in.
(H) (I) (J) (K) (L) (M) (N)
1460 mm
57.5 in.
(O) (P) (Q) (R) (S)
7170 mm
282.3 in.
770 mm
30.3 in.
4990 mm
196.5 in.
1460 mm
57.5 in.
2200 mm
86.6 in.
7330 mm
288.6 in.
6450 mm
253.9 in.
7300 mm
287.4 in.
500 mm
19.7 in.
2150 mm
84.6 in.
5250 mm
206.7 in.
500 mm
19.7 in.
2490 mm
98.0 in.
4600 mm
181.1 in.
2540 mm
100.0 in.
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3850 mm
151.6 in.
2200 mm
86.6 in.

G GENERAL

KiSC issued 08, 2015 A

GENERAL

KiSC issued 08, 2015 A
CONTENTS
1. CHECKING EXCAVATOR IDENTIFICATION .............................................................................. G-1
2. ENGINE IDENTIFICATION .......................................................................................................... G-2
[1] MODEL NAME AND SERIAL NUMBER ................................................................................ G-2
[2] E4B ENGINE .......................................................................................................................... G-3
[3] CYLINDER NUMBER ............................................................................................................. G-4
3. MUFFLER FULL ASSEMBLY IDENTIFICATION ......................................................................... G-5
[1] PART NUMBER AND SERIAL NUMBER .............................................................................. G-5
4. GENERAL PRECAUTIONS.......................................................................................................... G-7
5. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING .................................. G-11
[1] WIRING ................................................................................................................................ G-11
[2] FUSES.................................................................................................................................. G-13
[3] CONNECTOR ...................................................................................................................... G-13
[4] WASHING THE MACHINE WITH A HIGH-PRESSURE WASHER ..................................... G-15
6. TIGHTENING TORQUES........................................................................................................... G-16
[1] TORQUES FOR GENERAL USE NUTS AND BOLTS ........................................................ G-16
[2] TORQUE FOR HYDRAULIC HOSE FITTINGS ................................................................... G-17
(1) Torque for Hydraulic Hose Fittings ................................................................................. G-17
(2) Torques of Lock-Nuts for Elbows with Male Seats and Adaptors with O-rings
(Straight Threads)........................................................................................................... G-17
[3] HOSE CLAMP SCREW TORQUE ....................................................................................... G-18
7. OIL AND WATER CAPACITY TABLE ........................................................................................ G-20
8. MAINTENANCE INTERVALS..................................................................................................... G-21
KX080-4, WSM
KiSC issued 08, 2015 A

1. CHECKING EXCAVATOR IDENTIFICATION

When consulting with your local KUBOTA dealer about this mini-excavator, please provide the model of the mini-excavator, its frame and engine numbers and the number of hours on the hour meter.
(1) Mini-excavator Nameplate
(Model, frame number, engine
number) (2) Frame Number (3) Engine Number
(a) Model Nameplate
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GENERAL
G-1
KX080-4, WSM
KiSC issued 08, 2015 A

2. ENGINE IDENTIFICATION

[1] MODEL NAME AND SERIAL NUMBER
Be sure to check the engine nameplate and serial number when
you wish to consult about the engine.
The model and serial number of the engine need to be checked
prior to servicing the engine or replacing any of its parts.
Engine Serial No.
The engine serial number is the numerical ID of the engine and
is printed after the engine's model number.
The year and month of manufacture are indicated as follows.
Engine Series
Number or
Alphabet
1 05 (include: WG) 6
2V3703
308807
4 SM (include: WG) A EA, RK
5
Air Cooled
Series
Gasoline
Number or
Alphabet
B
GENERAL
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
E2014
(1) Engine Model Name and Serial
Number
Year
Alphabet or
Number
Year
(To be continued)
G-2
KX080-4, WSM
NOTE
KiSC issued 08, 2015 A
(Continued)
Production Month and Lot Number
Month Engine Lot Number
January A0001 to A9999 from B0001
February C0001 to C9999 from D0001
March E0001 to E9999 from F0001
April G0001 to G9999 from H0001
May J0001 to J9999 from K0001
June L0001 to L9999 from M0001
July N0001 to N9999 from P0001
August Q0001 to Q9999 from R0001
September S0001 to S9999 from T0001
October U0001 to U9999 from V0001
November W0001 to W9999 from X0001
December Y0001 to Y9999 from Z0001
* Alphabetical letters "I" and "O" are not used.
(a)
e.g. V2607
(a) V2607: Engine Model Name (b) 8: Engine Series (07 series) (c) C: Production Year (2012) (d) L: Production Month (June) (e) A001: Lot Number: (0001 to 9999 or A001 to Z999)
(b)C(c)L(d)
- 8
(e)
A001
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GENERAL
[2] E4B ENGINE
[Example: Engine Model Name V2607-CR-TE4(C)B-XXXX or V2607-CR-TIE4(C)B-XXXX]
The emission controls previously implemented in various countries to prevent air pollution will be stepped up as Nonroad Emission Standards continue to change. The timing or applicable date of the specific Nonroad Emission regulations depends on the engine output classification.
Over the past several years, KUBOTA has been supplying diesel engines that comply with regulations in the respective countries affected by Nonroad Emission regulations. For KUBOTA Engines, E4B will be the designation that identifies engine models affected by the next emission phase (See the table below).
When servicing or repairing ###-E4B series engines, use only replacement parts for that specific E4B engine, designated by the appropriate KUBOTA Parts List and perform all maintenance services listed in the appropriate KUBOTA Operator's Manual or in the appropriate KUBOTA Workshop Manual. Use of incorrect replacement parts or replacement parts from other emission level engines (for example: E3B engines), may result in emission levels out of compliance with the original E4B design and EPA or other applicable regulations.Please refer to the emission label located on the engine head cover to identify Output classification and Emission Control Information. E4B engines are identified with "EF" at the end of the Model designation, on the US EPA label. Please note: E4B is not marked on the engine.
Category (1) Engine output classification EPA regulation
Less than 19 kW Tier 4
EF
• "E4B" engines are identified with "EF" at the end of the Model designation, on the US EPA label. "E4B" designates some Interim Tier 4 / Tier 4 models, depending on engine output classification.
From 19 to less than 56 kW Interim Tier 4
From 56 to less than 75 kW Interim Tier 4
From 75 to less than 130 kW Interim Tier 4
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KX080-4, WSM
KiSC issued 08, 2015 A
[3] CYLINDER NUMBER
GENERAL
You can see the cylinder numbers of KUBOTA diesel engine in
the figure.
The sequence of cylinder numbers is No.1, No.2, No.3 and No.4
and it starts from the gear case side.
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G-4
KX080-4, WSM
KiSC issued 08, 2015 A

3. MUFFLER FULL ASSEMBLY IDENTIFICATION

[1] PART NUMBER AND SERIAL NUMBER
Diesel Particulate Filter (hereinafter referred to as the "DPF") Muffler Full Assembly Serial Number
The DPF muffler full assembly serial number is an identified
number for the DPF muffler full assembly.
It shows the month and year of manufacture as below.
Year of manufacture
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
Year
Alphabet or
Number
GENERAL
Yea r
Month of manufacture
Month DPF Muffler Full Assembly Lot Number
January A0001 to A9999 B0001 to BZ999
February C0001 to C9999 D0001 to DZ999
March E0001 to E9999 F0001 to FZ999
April G0001 to G9999 H0001 to HZ999
May J0001 to J9999 K0001 to KZ999
June L0001 to L9999 M0001 to MZ999
July N0001 to N9999 P0001 to PZ999
August Q0001 to Q9999 R0001 to RZ999
September S0001 to S9999 T0001 to TZ999
October U0001 to U9999 V0001 to VZ999
November W0001 to W9999 X0001 to XZ999
December Y0001 to Y9999 Z0001 to ZZ999
* Alphabetical letters "I" and "O" are not used.
(a)L(b)
(c)
e.g. C
(1) DPF Muffler Full Assembly Part Number and Serial Number
(a) Year: C indicates 2012 (b) Month: L or M indicates June (c) Lot Number: (0001 to 9999 or A001 to Z999)
0019
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KX080-4, WSM
KiSC issued 08, 2015 A
GENERAL
You must keep the records of the filter comp (DPF) part number
and serial number before you remove the DPF for cleaning.
(1) Body (DPF Outlet) Part Number and
Serial Number
(2) Filter Comp (DPF) Part Number and
Serial Number
(3) Catalyst (DOC) Part Number and
Serial Number
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G-6
KX080-4, WSM
KiSC issued 08, 2015 A

4. GENERAL PRECAUTIONS

Whenever performing maintenance on the machine, always
read the Safety Precautions in this manual and the Operator's Manual carefully, become familiar with them and perform the work safely.
Before performing any maintenance on the machine, make sure
it is sufficiently clean and choose a sufficiently clean location to perform any disassembly.
Before performing maintenance on the machine, always
disconnect the negative battery cable first.
Whenever a special tool is required, use the special tool that
KUBOTA recommends. Make any special tools that are not used very frequently according to the diagrams in this manual.
Always use genuine KUBOTA parts to maintain the
performance and safety characteristics of the machine.
Plumber's Tape
• Wrap plumber's tape on the threads before tightening taper couplings. After wrapping (2 wraps) the plumber's tape, tighten to the specified torque. Once the coupling is tightened, do not loosen it as this will cause an oil leak.
(1) Plumber's Tape (2) External Thread (3) Internal Thread
GENERAL
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(4) Gap (5) Leave 1 to 2 Threads
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O-Ring
• Clean the groove the O-ring goes in and remove any burrs. Apply grease on the O-ring when inserting it in the groove. (Except floating seals)
• When putting the O-ring in the groove, be careful as it is easy at the very end to twist the O-ring against the inside of the groove. If it gets twisted, roll it gently with your fingertip to untwist it.
(1) O-Ring Groove (2) O-Ring (3) Check for Burrs
(4) If the Ring Touches This Corner, It
Will Twist
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Oil Seal
• Do not face the lip of the oil seal in the wrong direction. Face the main lip toward the material to be sealed.
• After oil seals are replaced, apply grease to the moving parts around the lip to prevent the dry surfaces from wearing against each other when the engine is started. If the seal has a dust lip, fill the gap between the lips with grease.
• As a general rule, use a press to insert the oil seal in place. If that is not possible, use an appropriate tool to gently and evenly tap it into place, taking care that it does not go in at a slant. Press the seal all the way so it seats in the boss.
(1) Gasket (2) Metal Ring (3) Spring (4) Main Lip (5) Grease (6) Dust Lip
A : Air (Outside) B : Hydraulic Chamber (Inside)
RY9212001GEG0014US0
G-7
KX080-4, WSM
KiSC issued 08, 2015 A
GENERAL
Floating Seal
• Be sure to wipe off any oil from the O-ring or surfaces that touch the O-ring. (For wheel motors, apply a light film)
• When putting an O-ring into a floating seal, make sure the O-ring does not twist.
• Apply a light film of oil to surrounding surfaces when working to get the floating seal with O-ring in place; take care that the surrounding surfaces, O-ring and housing are parallel with each other.
• After getting the seal in place, turn the engine over 2 or 3 revolutions, to both create a film of oil on surrounding surfaces and to properly seat the face of the seal.
(1) Surrounding Surfaces (2) O-Ring
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Snap Ring Related
• When installing external or internal snap rings, orient them as shown in the diagram so the angled side faces the direction of force.
(1) Position so the Angled Part
Receives the Force
(A) External (B) Internal
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Spring Pins
• When driving a spring pin, face the split in the direction that receives the force, as shown in the diagram.
(1) With Lateral Movement (2) With Rotational Movement
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Adhesive
• Clean and dry the area where adhesive will be applied with a solvent so it is free of moisture, oil and dirt.
• Apply adhesive all around the threads of the bolt except the first set of threads at the tip and fill the grooves between the threads. If the threads or the grooves are large, adjust the amount of adhesive accordingly and apply it all around the bolt hole as well.
(A) Bolt Through-Hole (Nut) (B) Pocket Bolt Hold
(Capsule Shape, etc.)
(a) Apply Here (b) Do Not Apply (c) Drip On
RY9212001GEG0018US0
G-8
KX080-4, WSM
KiSC issued 08, 2015 A
GENERAL
Tightening Bolts and Nuts
• Tighten bolts and nuts to their specified torque.
• Tighten nuts and bolts alternately top/bottom (a) (b), left/right so
the torque is distributed evenly.
(A) Top/Bottom Alternately (B) Across Diagonally
(C) Diagonally Across the Center
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Assembling Hydraulic Hoses
• Tighten to their specified torque.
• Before assembling, wipe the inside of metal fittings clean of any dirt.
• After assembly, put the fitting under normal pressure and check that it does not leak.
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Elbow with Male Seat Assembly Procedure
When assembling an elbow with male seat, adhere to the
following procedures to prevent deformation of O-rings and leaks.
1. Connecting to Valves
• Clean the blow with male seat and the surface of the seal opposite and mount with the lock-nut on top.
• Finger tighten till it touches the washer.
2. Positioning
• Turn the mouth of the elbow back so it faces the right direction. (not back over 1 turn)
3. Fasten
• Tighten the lock-nut to the specified torque with a wrench.
(1) Lock-Nut (2) Washer (3) Seal (O-Ring)
(4) Wrench for Holding (5) Hose (6) Torque Wrench for Tightening
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G-9
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