Kubota U25-3 Manuals

Manuals and User Guides for Kubota U25-3. We have 2 Kubota U25-3 manuals available for free PDF download: Workshop Manual, Operator's Manual

Kubota U25-3 Workshop Manual (509 pages)

Brand: Kubota | Category: Excavators | Size: 29.43 MB

Table of Contents
3
A. Body and Engine Identification Marks
7
Safety Measures before Starting Work
8
Safety Measures During Work
8
Safety Precautions for Servicing, Disassembly and Reassembly
8
- Acceptance Inspection
  9
- Cleaning
  9
- Preparation for Disassembly
  9
- Essential Adhesives
  10
- Important Inspection Items after Reassembling
  10
- Important Safety Process and Critical Functional Process
  10
- Items for Servicing
  11
- Locking Adhesive
  11
- Servicing Fundamentals
  11
- O-Ring, Oil Seal, Circlip and Roll Pin
  13
  - Mounting the Circlip
    14
  - Tapping the Roll Pin (Spring Pin)
    14
  - Hydraulic Hose
    15
- Piping
  15
  - Precautions in Tightening the Bolts and Nuts
    15
  - Hose Screw
    16
  - Joint Bodies
    16
  - Metric Size Hose
    16
  - Nuts for Piping
    17
  - Tightening Torque Table for Hose Clamp (Screw Type)
    17
  - Tightening Torque of Bolts and Nuts
    18
  - Types and Materials of Bolts and Nuts
    18
  - Connecting with the Valve
    19
  - Washer-Equipped Elbow
    19
- Machine Quality Specifications
  20
- Maintenance Intervals Chart
  28
  - Changing and Filling up of Hydraulic Oil
    29
  - Changing the Return Filter and Oil
    29
- Hydraulic Oil Check for Machines with Hydraulic Breakers
  29
- List of Important Parts
  30
- Periodic Replacement of Important Parts
  30
  - Machine Body (Mechanism Section)
    31
  - Specifications
    33
- Main Dimensions
  34
- Bucket
  35
- Components Interchangeability
  35
- Control Linkage
  36
- Machine Structure
  36
  - Traveling Lever
    36
  - Accelerator Lever
    37
  - Dozer Lever
    37
  - Service Port Pedal
    38
  - Swing Pedal
    38
  - Retractable Track Lever
    39
- Engine Mount
  40
- Tension Spring
  42
- Undercarriage
  42
  - Upper Roller and Track Roller
    42
  - Fixed Undercarriage
    43
  - Interchangeability between Rubber and Iron Crawler
    43
  - Retractable Undercarriage (U20-3 Only)
    44
  - Retractable Undercarriage
    45
  - Rubber Crawler
    46
  - Steel Crawler
    47
  - Machine Body (Service Section)
    49
  - Machine Weight
    51
  - Machine Specifications
    52
  - Lever Stroke and Operating Force
    53
- Service Section
  53
  - Dimensions of Parts
    54
  - Front Pins
    54
  - Bucket Dimensions
    55
  - Bucket Installation Relevant Dimensions
    56
- Service Section
  58
  - Track Roller, Idler, and Sprocket
    58
  - Dozer
    59
  - Parts Weight
    60
  - Water and Oil Quantity
    61
  - Front Attachment
    62
  - Parts Designation
    62
  - Arm
    63
  - Boom
    63
  - Boom Cylinder Cover
    63
  - Swing Bracket
    63
  - Blade
    64
  - Bracket Link
    64
  - Exchange of Bucket
    65
  - Fitting the Bucket
    65
  - Removing the Bucket
    65
Hydraulic System
65
- Bucket Tooth Replacement
  66
- Exchange of Bucket Teeth and Side Cutters
  66
- Replacing the Side Cutter
  66
- Installation of Dust Seal
  67
- Installation of Thrust Collar on the Swing Bracket
  67
- Front Clearances
  68
- Installation of Pin and Bush
  68
- Pin Bush
  68
- Front Hose Assembly
  70
- Front Hose Control Valve Side
  71
- Hose Clamp
  71
- Assembling Procedure
  72
- Lever and Pedal
  72
- Travel Lever
  72
- Upper Structure
  72
- Check Items after Setup
  73
- Fitting the Plastic Cap
  74
- Tightening Torque of Bolt
  74
- Travel Lever Assembly View
  74
- Travel Lever Lock
  75
- Acceleration / Ever Assembly View (Engine Side)
  76
- Acceleration Lever
  76
- Acceleration Lever Assembly View (Lever Side)
  76
- Acceleration Cable and Hour Meter Cable Routes
  77
- Dozer Cable Route
  79
- Dozer Lever Assembly View
  79
- Swing Pedal Assembly View
  80
- Service Port Operation
  81
- High-Speed Traveling Pedal
  82
- Limit Switch Setup View
  82
- Limit Switch, Left
  82
- Filter (Suction)
  83
- Filter, Assembly (Return)
  83
- Hydraulic Oil Tank Assembling View
  83
- Fuel Tank Assembly View
  84
- Fuel Hose
  85
- Fuel Hose Routes
  85
- Counterweight
  86
- Counterweight Assembly View
  86
- Counterweight Identification
  86
- Counterweight Removal Procedure
  86
- Cab Canopy Installation
  87
- Installing the Cabin
  87
- Canopy Installation
  88
- Tightening Torque of Canopy Lock Screw
  88
- Cover (Seat Support) Identification
  89
- Heater Setup
  89
- Defroster Setup
  90
- Thermal Insulation and Sound Absorber
  91
- Left-Hand Setup
  92
- Right-Hand Setup
  92
- Seat Belt Connection
  92
- Tightening Torque of Seat Belt Assembly
  92
- Boom Cylinder for Cab Type
  93
- Grease Tube
  94
- Swivel Bearing Assembly View
  94
- Under Carriage
  94
- Tension Cylinder
  95
- Track Tension Device
  95
- Idler
  96
- Carrier Roller
  97
- Track Roller
  97
- Track Roller Disassembling Procedure
  98
- Carrier Roller Disassembling Procedure
  99
- Crawler Replacement and Tension Adjustment
  101
- Dimensional View
  102
- Service Data
  102
- Variable Track (U20-3)
  102
- Width MM
  102
- Track Frame
  103
- To Change the Track Width from Large to Small
  104
- Track Stretch Lever
  104
- Track Width Operation
  104
- Main Specifications
  105
- Track Cylinder
  105
- Blade Cylinder
  106
- List of High-Pressure Hoses (Upper Route)
  107
- List of High-Pressure Hoses(Lower Routes)
  107
- Hydraulic Hose Routes
  108
- Precautions in Disassembling/Reassembling
  108
- Travel Wheel Motor Setup
  108
- Blade Piping
  109
- Track Stretcher Piping
  109
- Left-Travel Piping
  110
- Right-Travel Piping
  110
- Control Valve
  111
- Swivel Joint
  112
- Variable Type
  114
- M Series Engine
  115
- 05-M Series Engine WSM
  117
- Before Servicing and Repairing
  118
- Engine Specifications for Construction Machinery
  119
- Engine Electric Components
  120
- Performance Curves
  121
- Dimensions
  123
- Engine (Mechanism Section)
  125
- Feature
  127
- Cylinder Block
  128
- Cylinder Head
  128
- Engine Body
  128
- Crankshaft
  129
- Piston and Piston Rings
  129
- Camshaft
  130
- Connecting Rod
  130
- Rocker Arm
  130
- Flywheel
  131
- Fuel Camshaft
  131
- General
  132
- Lubricating System
  132
- Oil Pump
  133
- Relief Valve
  133
- Oil Filter Cartridge
  134
- Oil Pressure Switch
  134
- Cooling System
  135
- General
  135
- Water Pump
  135
- Radiator (Not Included in the Basic Engine)
  136
- Thermostat
  136
- Radiator Cap
  137
- Air Cleaner (Not Included in the Basic Engine)
  138
- Intake / Exhaust System
  138
- Fuel System
  139
- General
  139
- Injection Pump
  139
  - Delivery Valve
    140
  - Pump Element
    140
  - Reverse Flow Preventing Function
    140
  - Suck-Back Function
    140
  - At Fuel Injection
    141
  - At Suck-Back
    141
  - Dumping Valve
    141
  - Injection Control
    141
- Fuel Filter (Not Included in the Basic Model)
  142
- Injection Nozzle
  142
- Governor
  143
  - At High Speed Running with Overload
    144
  - At Idling
    144
  - At Start
    144
  - During Overload
    144
- Automatic Advance Timer (Not Included in the Basic Model)
  145
  - During Low-Speed Travel
    146
  - During Medium to High-Speed Travel
    146
  - Alternator
    147
- Charging System
  147
- Electrical System
  147
- IC Regulator
  147
- Turbo Charger System
  148
  - Turbocharger Works
    149
  - Compressor
    150
  - Turbine
    150
  - Bearing
    151
  - Seals (Piston Rings)
    152
  - Anti-Vibration Rubber Assembly View
    155
- Engine (Service Section)
  155
  - Engine Bracket Assembly View
    155
  - Engine Mount on the Machine
    155
  - Engine Setup View
    155
  - Detaching the Radiator
    156
  - Reassembling the Radiator
    157
  - Muffler Assembly View
    160
  - Reassembling Procedure
    160
  - Air Cleaner Assembly View
    161
  - Engine Assembly View
    161
  - Fan Belt
    161
  - Cylinder Number
    162
- Engine Identification
  162
- General
  162
- Model Name and Engine Serial Number
  162
- General Precaution
  163
- Tightening Torques
  164
- Troubleshooting
  165
- Servicing Specifications
  168
  - Valve Spring
    169
  - Valve Timing
    169
- Maintenance Check List
  177
- Check and Maintenance
  178
  - Checking and Replenish Cooling Water
    178
  - Checking Engine Oil Level
    178
  - Daily Check Points
    178
  - Check Point of Every 50 Hours
    179
  - Checking Fuel Pipe
    179
  - When Bleeding the System
    179
  - Changing Engine Oil
    180
  - Changing Engine Oil Filter Cartridge
    180
  - Check Point of Every 100 Hours
    180
  - Changing Fuel Filter
    181
  - Checking Fan Belt Damage
    181
  - Checking Fan Bent Tension
    181
  - Cleaning Air Cleaner
    182
  - Cleaning Air Filter Element
    182
  - Check Point of Every 800 Hours
    183
  - Checking Valve Clearance
    183
  - Check Point of 1500 Hours
    184
  - Checking Nozzle Injection Pressure
    184
  - Flywheel Puller
    184
  - Oil Pressure Tester
    185
  - Special Use Puller Set
    185
  - Valve Seat Cutter Set
    185
  - Connecting Rod Alignment Tool
    186
  - Press Gauge
    186
  - Red Check
    186
  - Valve Guide Replacing Tool
    187
  - Injection Pump Pressure Tester
    188
  - Bushing Replacing Tool
    189
  - Flywheel Stopper
    189
  - Crankshaft Bearing 1 Replacing Tool
    190
  - Governor Gear Holder Bushing Replacing Tool
    190
- Checking and Adjusting
  191
- Compression Pressure
  191
- Engine Body
  191
- Disassembling and Assembling
  192
- Top Clearance
  192
- Draining Water and Oil
  193
- External Components
  193
- Cylinder Head and Valves
  194
  - Nozzle Holder Assembly
    194
  - Rocker Arm and Push Rod
    194
  - Tappets
    195
  - Valves
    195
  - Fuel Feed Pump and Hour Meter Gear Case
    196
- Gear Case
  196
  - Nozzle Heat Seat Service Removal Procedure
    196
  - Engine Stop Solenoid and Speed Control Plate
    197
  - Fan Drive Pulley
    197
  - Timer
    199
  - Governor Shaft
    200
  - Fork Lever
    201
  - Cam Gear and Idle Gear
    202
  - Oil Pan and Oil Strainer
    202
- Piston and Connecting Rod
  202
  - Connecting Rod Cap
    203
  - Piston
    203
  - Piston Ring and Connecting Rod
    204
- Flywheel and Crankshaft
  205
  - Starter
    205
  - Bearing Case Cover and Crankshaft
    206
  - Cylinder Head Surface Flatness
    207
  - Main Bearing Case Assembly
    207
- Servicing
  207
  - Clearance between Valve Stem and Valve Guide
    208
  - Cylinder Head Flaw
    208
  - Valve Recessing
    208
  - Correcting Valve and Valve Seat
    209
  - Valve Seating
    209
  - Free Length and Tilt of Valve Spring
    210
  - Replacing Valve Guide
    210
  - Valve Lapping
    210
  - Oil Clearance between Rocker Arm Shaft and Bearing
    211
  - Oil Clearance between Tappet and Tappet Guide Bore
    211
  - Push Rod Alignment
    211
  - Valve Spring Setting Load
    211
  - Camshaft Side Clearance
    212
  - Idle Gear Side Clearance
    212
- Timing Gear and Camshaft
  212
- Piston and Connecting Rod
  214
  - Piston Pin Bore I.D.
    214
  - Replacing Idle Gear Bushing
    214
  - Piston Ring Gap
    215
  - Replacing Small End Bushing
    215
  - Clearance between Piston Ring and Groove
    216
  - Connecting Rod Alignment
    216
  - Crankshaft Alignment
    217
  - Crankshaft Side Clearance
    217
  - Oil Clearance between Crankpin and Crankpin Bearing
    218
  - Undersize Crankpin Bearing
    218
  - Undersize Dimensions of Crankpin
    218
  - Oil Clearance between Crankshaft Journal and Crankshaft Bearing
    219
  - Replacing Crankshaft Bearing
    220
  - Cylinder Wear
    223
  - Correcting Cylinder
    224
- Checking
  225
  - Clearance between Outer Rotor and Pump Body
    225
  - Engine Oil Pressure
    225
- Lubricating System
  225
- Rotor Lobe Clearance
  225
- Servicing
  225
- Clearance between Rotor and Cover
  226
- Checking
  227
- Cooling System
  227
- Fan Belt Tension
  227
- Radiator
  227
- Thermostat Valve Opening Temperature
  227
- Disassembling and Assembling
  228
  - Radiator Cap Air Leakage
    228
  - Radiator Water Leakage
    228
  - Thermostat Assembly
    228
  - Water Pump Assembly
    229
- Checking and Adjusting
  230
- Fuel System
  230
- Injection Pump
  230
  - Injection Timing
    230
  - Fuel Tightness of Pump Elemenet
    231
  - Fuel Tightness of Delivery Valve
    232
  - Nozzle Injection Pressure
    232
- Disassembling and Assembling
  233
- Injection Pump
  233
  - Nozzle Spraying Condition
    233
  - Valve Seat Tightness
    233
- Injection Nozzle
  234
- Nozzle Holder
  234
- Checking
  235
- Electrical System
  235
  - Magnet Switch Test
    235
  - Motor Test
    235
- Starter
  235
- Disassembling and Assembling
  236
- Disassembling Motor
  236
- Glow Plug
  236
- Starter
  236
- Alternator
  237
  - Disassembling Magnet Switch
    237
  - Plunger
    237
  - Pulley
    237
  - Rear End Cover
    237
  - Brush Holder
    238
  - Rear End Frame
    238
  - Rectifier
    238
  - Rotor
    238
  - Bearing at Slip Ring Side
    239
  - Bearing on Drive End Side
    239
  - Retainer Plate
    239
  - Brush Wear
    240
  - Commutator and Mica
    240
- Servicing
  240
- Starter
  240
  - Armature Coil
    241
  - Field Coil
    241
- Alternator
  242
  - Armature Bearing
    242
  - Magnet Switch
    242
  - Overrunning Clutch
    242
  - Slip Ring
    243
  - Stator
    243
- Checking
  245
  - Compressor Side
    245
  - Turbine Side
    245
- Turbo Charger System
  245
  - Wheel Shaft
    245
  - Axial Clearance
    246
  - Radial Clearance
    246
  - Turbine / Compressor Wheel
    246
  - Air Cleaner and Muffler
    247
- Disassembling and Assembling
  247
  - Oil Pipe
    247
  - Turbocharger
    248
  - Hydraulic System (Mechanism Section)
    249
- Features of Hydraulic System
  251
- Hydraulic System (Mechanism Section)
  251
  - Hydraulic System Specifications
    252
  - Main Pump
    253
  - Structure & Specifications
    253
- Performance Curve
  254
- Construction and Behavior
  256
- Operating Principle
  256
- Outline
  256
- Specifications
  257
- General View of Control Valve
  259
  - Boom Section
    261
  - Bucket Section
    261
- Sectional View
  261
  - Inlet Section
    262
  - Travel (Left) Section
    262
  - Travel (Right) Section
    262
  - Arm Section
    263
- Service Section
  264
  - Swing Section
    264
  - Swivel Section
    264
  - Dozer Section
    265
  - Travel Straight Section
    265
  - Arm Crowd
    266
  - Arm Dump
    266
- Arm Regeneration Circuit
  266
- At Neutral Position of Boom Section
  267
- Boom Anti-Fall Valve
  267
- Straight Travel Circuit
  272
- Working Effect
  272
- Simultaneous Operation of Boom & Bucket
  275
  - Function of Anti-Cavitation Valve
    276
  - Function of Relief Valve
    276
- Relief Valve/Anti-Cavitation Valve
  276
- Automatic Air Bleeding in Hydraulic Pilot Section
  277
- Pilot Valve
  277
- Tightening Torque List
  278
- Pilot Valve Control Diagram
  280
  - Basic Function
    281
  - Function
    281
  - Functions of Major Parts
    281
  - Pilot Valve Application
    282
  - With the Lever at Neutral
    282
  - With the Lever Being Tilted
    283
  - With the Lever Held Tilted
    283
  - With the Lever too Tilted (Depending on the Model)
    283
- Structure & Specifications
  284
- Swing Motor
  284
- Operating Principle
  285
- Function of Negative Brake
  287
  - Negative Brake Function (Unload Condition)
    287
  - Negative Brake Release (On-Load Condition)
    287
  - Fixed Undercarriage (U20-3, U25-3)
    288
  - Retractable Undercarriage (U20-3)
    288
  - Rotary Joint (Swivel Joint)
    288
  - Travel Motor
    290
  - Operating Principle of Wheel Motor
    291
  - Principle of Operation
    291
  - Reducer
    292
  - Function of Motor
    293
  - Hydraulic Motor
    293
  - Structure of Motor and Operating Principle
    293
  - Operating Principle of Two-Speed Motor
    294
  - Hydraulic Valve (Counter Balance Valve)
    295
- Structure & Specifications
  296
- U25-3 (Kayaba)
  296
- Specifications
  297
- Operating Principle of Motor
  298
- Operating Principle of Counter Valance Valve
  299
  - Counter Balance Function
    300
  - Brake Function
    301
  - Counter Balance Valve
    301
- Function of Hi-Lo Change
  302
- 2Nd (High) Speed
  303
- Function of Reduction Gear
  304
- Function of Anti-Cavitation Valve
  305
  - Circuit Behavior
    306
  - Motor Start-Up
    306
  - Motor Running at Constant Speed
    307
  - Motor Slowing down
    308
  - Motor Stop
    309
- Hydraulic Circuit Diagram
  311
- U20-3 Fixed Undercarriage
  311
- U20-3 Retractable Undercarriage
  312
- Hydraulic Components Layout
  314
- U25-3
  314
- Hydraulic System (Service Section)
  315
- Common Circuit
  317
- Hydraulic System (Service Section)
  317
- Troubleshooting
  317
- Hydraulics
  319
- Pump
  321
- Motor
  322
- Swivel Performance
  323
- Traveling Performance
  329
  - Travel Mechanism Check Points
    330
  - Checking the Communicating Valve
    331
  - Checking the Counterbalance Valve and High/Low-Speed Selector Valve
    331
  - Checking the Left Travel
    332
  - Checking the Right Travel
    332
  - Checking the Rotary Joint for Internal Leak
    332
  - Pomp
    333
- Specifications
  333
- Swivel Performance
  337
- Traveling Performance
  338
- Cylinder
  339
  - Natural Fall
    339
  - Speed
    339
  - Specifications and Dimensions
    340
  - Specifications and Dimensions at a Glance
    340
  - Cylinder Dimensional Specifications
    341
  - Arm Cylinder
    342
  - Boom Cylinder
    342
  - Bucket Cylinder
    342
  - Tightening Torque
    342
  - Dozer Cylinder
    343
  - Swing Cylinder
    343
  - Checking the Pump Performance
    344
  - Pump Discharge Side
    344
- Pump Flow
  344
- Testing
  344
  - Control Valve Section Layout
    345
  - Pilot Pressure
    345
  - Pilot Primary Pressure
    345
- Pressure Measurement
  345
  - Main Relief Valve Pressure
    346
  - Pilot Valve Hose Routes
    346
  - Overload Relief Pressure
    348
  - Swivel Brake Pressure
    349
  - Swivel Brake Release Valve
    350
  - Travel Two-Speed Selector Pressure
    350
- Drain Measurement
  351
- Swivel Motor
  352
- Measurement of Block Performance
  353
  - Swivel
    353
  - Travel
    353
  - Checking Procedure of each Speed
    354
  - Gravity Fall of Cylinder
    354
- Operating Speed
  354
- Control and Traveling Lever Operating Force
  356
- Straight Travel Performance
  356
- Control and Traveling Lever Operating Force
  357
- Cylinder Natural Fall Amount
  357
- Lever Stroke
  357
  - Disassembling the Pump
    358
  - Pump Coupling
    358
  - Mounting and Dismounting the Pump
    360
  - Component Parts of Pump
    361
  - Disassembling and Reassembling the Pump
    362
  - Disassembling the Body S Kit
    363
  - Dismounting the Oil Seal
    363
  - Separating the Body S from the Body H
    363
  - Disassembling the Body H Kit
    364
  - Disassembling the Cylinder Barrel Kit
    364
  - Assembling the Cylinder Barrel Kit
    365
  - Assembling the Oil Seal
    365
  - Reassembling Precautions
    365
  - Assembling the Body H Kit (Photo 12)
    366
  - Assembling the Body S Kit
    366
  - Assembling the Body S Kit and Body H Kit
    366
  - Assembling the Stopper Pin a and B Kits
    366
  - Checking after Assembly
    367
  - Mounting the Gear Pump
    367
  - Mounting the Hex Socket Lock Screw
    367
  - Troubleshooting of Pump
    367
  - Mounting and Dismounting the Valve
    368
  - Disassembling and Reassembling the Valve
    370
  - Component Parts of Sections
    371
  - Component Parts of Anti-Drift Valve
    372
  - Travel Right Section
    372
  - Component Part of Main Relief Valve
    373
  - Travel Left Section
    374
  - Service Port Section
    375
  - Mounting and Dismounting the Pilot Valve
    379
  - Left P/V
    380
  - Right P/V
    380
  - Disassembling and Reassembling the Pilot Valve
    381
  - Maintenance Standard
    381
  - Trouble Shooting
    392
  - Dismounting the Swivel Motor
    393
  - Mounting and Dismounting the Swivel Motor
    393
  - Swivel Motor Mounting/Dismounting Component Parts
    395
  - Disassembling and Reassembling the Swivel Motor
    399
- Rotary Joint (Swivel Joint)
  409
  - Mounting the Adaptor
    412
  - Mounting and Dismounting the Wheel Motor
    413
- Traveling Motor
  413
- General Cautions in Disassembling/Reassembling
  417
  - Fit the Floating Seal
    430
  - Reassembling the Wheel Motor
    430
  - Mounting Jig
    434
  - Wire
    434
  - Pin
    435
  - Swash Plate
    435
  - Plunger Assembly
    439
  - Disassembling and Reassembling the Boom Cylinder
    443
  - Measuring the Bent in the Piston Rod
    447
  - Measuring the Wear in the Rod and Bush
    447
  - Measuring the Wear in the Tube and Piston Ring
    447
  - Delivery Hose Routing
    448
- Hydraulic Hose
  448
  - Return Drain Hose Routing
    449
  - Blade / Travel Hose
    451
  - Blade/Swing Hose Routing
    451
  - Travel Hose Routing (Rotary Joint Upper)
    451
  - Travel, Swivel, Swing and Blade Hose Routing (Rotary Joint Upper)
    452
  - List of Pilot Hoses
    453
  - Pilot Hose Routing
    454
  - Cross Sectional View of Selector Valve
    455
  - Disassembling the Selector Valve
    455
- Other Hydraulic Valve
  455
  - Selector Valve
    455
  - Installing the Selector Valve
    456
  - Pilot Filter
    456
  - Accumulator
    457
  - Circuit Selection Valve Operation
    458
  - Third Line
    458
  - Components & Harness Layout
    461
  - Battery Circuit
    462
  - Function of Main Circuit
    462
  - Safety Relay Circuit (Automatic Release Function)
    463
  - Auto Glow Circuit
    464
  - Reference: nor Logic Circuit
    464
  - Timer Curve
    465
  - Timer Function Values
    465
  - Fuel Control Circuit
    466
  - Circuit and Its Function
    467
  - Engine Stop Solenoid
    467
  - Engine Oil Pressure Sensor Circuit
    468
  - In Normal Condition
    468
  - Oil Switch
    468
  - Operating Pressure of Oil Switch
    468
  - Horn Circuit
    469
  - Current Flow
    470
  - Cab & Working Lamp Circuit
    472
  - Circuit Diagram
    473
  - Meter Panel
    473
  - Electromagnetic Braking
    474
  - Heater Circuit
    474
  - Purpose of Relay
    474
  - Travel Hi-Speed Control Circuit
    475
  - Troubleshooting: Travel Hi-Speed Malfunction
    475
  - Electrical System (Service Section)
    477
  - Anchor Type
    479
  - Harness-Fixed Clamp
    479
  - Plug-In Type
    479
  - Wire Harness Installation
    479
  - Front
    480
  - Swivel Frame
    482
  - Around Battery
    483
  - Around Selector Valve
    486
  - Check Instructions
    491
  - Fuse Capacities and Circuits
    491
  - Replacing Fuses
    491
  - Automatic Release Relay
    492
  - Battery Voltage
    492
  - Release Controller
    493
  - Starter Motor
    493
  - Voltage Check
    493
  - Fuel Pump Coupler
    494
  - Key Switch
    494
  - Measuring the Voltage of the Fuel Pump
    494
  - Glow Relay
    495
  - Measuring the Voltage of the Engine Stop
    495
  - Measuring the Voltage of the Glow Relay
    495
  - Inspection of Glow Plug
    496
  - Inspection of Glow Relay
    496
  - Measuring the Voltage of the Glow Plug
    496
  - Charge Engine Oil Lamp
    498
  - Inspection of Alternator
    499
  - Measurement of Engine Oil Pressure
    499
  - Disconnect the Water Temperature Gauge
    500
  - Inspection of Water Temperature Gauge
    500
  - Water Temperature Gauge
    500
  - Fuel Sensor
    501
  - Inspection of Fuel Sensor
    502
  - Interchanging of Lever Lock Coupler
    502
  - Solenoid Valve
    502
  - Inspection of Lever Lock Switch
    504
  - Horn
    505
  - Inspection of Horn
    505
  - Inspection of Horn Switch
    505
  - Measuring the Voltage of the Horn Terminal
    505
  - Measuring the Voltage of the Working Light
    506
  - Working Light
    506
- Service Section
  508

Kubota U25-3 Operator's Manual (83 pages)

Brand: Kubota | Category: Excavators | Size: 5.55 MB

Table of Contents
5
Safe Operation
21
Dealer Service
21
Technical Data
22
Description of Machine Parts
23
Instrument Panel and Control Elements
24
Checks before Start
26
Daily Checks
26
Sliding the Seat
26
Opening and Closing of Parts
27
Opening / Closing of the Engine Bonnet
27
Opening and Closing of the Fuel Tank Cover
27
Keeping the Tools
28
Operator's Manual Storage
28
Handling the Safety Devices
28
Control Lever Lock
28
Roll-Over Protective Structures (ROPS) / Operator Protective Guards of Top Guard Level I (OPG (Top Guard Level I))
29
Operation of the Engine
30
Starting the Engine
30
Display Selector Switch
31
Charge Lamp
31
Oil Lamp
31
Glow Lamp
31
LCD Display for Normal Operation
32
LCD Display for Warning
33
Warning Lamp
33
Checkpoints after Starting the Engine
34
Starting the Engine under Cold Conditions
34
Stopping the Engine
34
Engine Stop Lever
35
Starting with an Auxiliary Battery
35
Observe Following Guidelines When Starting with an Auxiliary Battery
35
Excavator Operation
36
Running-In of the New Excavator
36
Do Not Work with Full Engine Rpm's or Full Loads During the First 50 Working Hours
36
Oil Change in the Run-In Stage
36
Seat Belt
36
Starting
36
Adjusting the Operator's Seat
36
Lock Lever
37
Working Light Switch
37
Travel Buzzer
37
Two Pattern Selection System(Tpss)
38
Pattern Change
38
Operation of the Boom
39
Operation of the Arm
39
Operation of Bucket
40
Swivel(Unit Swing)Operation
40
Boom Swing Operation
40
Operation of the Dozer
40
Service Port Operation
41
Driving
41
Drive Levers (Right, Left)
42
Travel Speed Switch
42
Turns
43
Pivot Turn
43
Spin Turn
44
Up and Downhill Travelling
44
Parking on a Slope
45
Important Information on Excavator Operation
45
Transporting the Excavator on a Truck
46
Lifting of the Excavator
48
Maintenance
50
Maintenance Intervals
50
Daily Checks
53
Check Fuel Level
53
Check Engine Oil Level
54
Check Hydraulic Oil Level
54
Checking Coolant Level
55
Washing Whole Machine
55
Lubrication Points
55
Check Fan Belt
56
Cleaning of Engine and Electrical Wiring
56
Check Radiator and Oil Cooler
56
Regular Checks and Maintenance Work
57
Every 50 Service Hours
57
Draining the Water from the Fuel Tank
57
Draining Water Separator
57
Battery
58
Battery Charging
59
Greasing of Swing Bearing Teeth
59
Every 200 Service Hours
60
Checking Fan Belt Tension
60
Checking Radiator Hoses and Clamps
60
Inspection and Cleaning Air Filter Element
61
Air Filter Maintenance
61
Greasing Swing Bearing
61
Checking Fuel Line and Intake Air Line
62
Every 250 Service Hours
62
Engine Oil Change (First Engine Oil Change after 50 Service Hours)
62
Replacing Engine Oil Filter Cartridge (First Engine Oil Filter Change after 50 Service Hours)
63
Lubrication of the Pilot Valve
63
Every 500 Service Hours
64
Drive Unit Oil Change(First Oil Change of the 100 Hours)
64
Replacing Fuel Filter Cartridge
64
Replacing Hydraulic Return Filter Element (First Replacement after 250 Service Hours)
65
Every 1000 Service Hours
65
Cleaning of the Pipe Filter of the Hydraulic Pilot System (for Hydraulic Pilot Types)
65
Replacing the Hydraulic Pilot Filter Element
65
Hydraulic Oil Change (Including Replacing of the Suction Filter in the Hydraulic Tank)
66
Hydraulic Oil Check with Hydraulic Breakers
67
Every 1000 Service Hours or Once Ayear
67
Replacing Air Filter Element
67
Every 1500 Service Hours
67
Checking Fuel Injection Nozzle(Injection Pressure)
67
Every 2000 Service Hours
67
Changing Front Idler and Track Roller Oil
67
Checking the Alternator and Starter Motor
67
Every 3000 Service Hours
67
Checking Injection Pump
67
Annual Servicing
68
Electrical Wiring and Fuses
68
Checking the Electrical Circuit
68
Biennial Servicing
68
Replacement of Radiator Hoses and Hose Clamps
68
Changing Radiator Coolant
68
Replacing Fuel Hoses and Clamps
69
Replacing Intake Air Line
69
Other Adjustments and Replacements
70
Purging of the Fuel System
70
Adjustment of Tracks
70
Special Information When Using Rubber Tracks
71
Changing the Bucket
72
Fuses
72
Replacing Fuses
72
Fuse Capacities and Circuits
72
Slow Blow Fuse
73
Troubleshooting
74
Kubota I.C.s. Navigation List of Messages
75
Operation under Cold Weather Conditions
77
Preparation for Operation in Cold Weather
77
Procedure after Done Work
77
Long Storage
78
Recommended Oils
80
Main Dimensions
81
Lifting Capacity
82

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