Kubota U25-3 - Oil Clearance between Rocker Arm Shaft and Bearing; Oil Clearance between Tappet and Tappet Guide Bore; Push Rod Alignment; Valve Spring Setting Load

Bucket Tooth Replacement66

Exchange of Bucket Teeth and Side Cutters66

Replacing the Side Cutter66

Installation of Dust Seal67

Installation of Thrust Collar on the Swing Bracket67

Front Clearances68

Installation of Pin and Bush68

Pin Bush68

Front Hose Assembly70

Front Hose Control Valve Side71

Hose Clamp71

Assembling Procedure72

Lever and Pedal72

Travel Lever72

Upper Structure72

Check Items after Setup73

Fitting the Plastic Cap74

Tightening Torque of Bolt74

Travel Lever Assembly View74

Travel Lever Lock75

Acceleration / Ever Assembly View (Engine Side)76

Acceleration Lever76

Acceleration Lever Assembly View (Lever Side)76

Acceleration Cable and Hour Meter Cable Routes77

Dozer Cable Route79

Dozer Lever Assembly View79

Swing Pedal Assembly View80

Service Port Operation81

High-Speed Traveling Pedal82

Limit Switch Setup View82

Limit Switch, Left82

Filter (Suction)83

Filter, Assembly (Return)83

Hydraulic Oil Tank Assembling View83

Fuel Tank Assembly View84

Fuel Hose85

Fuel Hose Routes85

Counterweight86

Counterweight Assembly View86

Counterweight Identification86

Counterweight Removal Procedure86

Cab Canopy Installation87

Installing the Cabin87

Canopy Installation88

Tightening Torque of Canopy Lock Screw88

Cover (Seat Support) Identification89

Heater Setup89

Defroster Setup90

Thermal Insulation and Sound Absorber91

Left-Hand Setup92

Right-Hand Setup92

Seat Belt Connection92

Tightening Torque of Seat Belt Assembly92

Boom Cylinder for Cab Type93

Grease Tube94

Swivel Bearing Assembly View94

Under Carriage94

Tension Cylinder95

Track Tension Device95

Idler96

Carrier Roller97

Track Roller97

Track Roller Disassembling Procedure98

Carrier Roller Disassembling Procedure99

Crawler Replacement and Tension Adjustment101

Dimensional View102

Service Data102

Variable Track (U20-3)102

Width MM102

Track Frame103

To Change the Track Width from Large to Small104

Track Stretch Lever104

Track Width Operation104

Main Specifications105

Track Cylinder105

Blade Cylinder106

List of High-Pressure Hoses (Upper Route)107

List of High-Pressure Hoses(Lower Routes)107

Hydraulic Hose Routes108

Precautions in Disassembling/Reassembling108

Travel Wheel Motor Setup108

Blade Piping109

Track Stretcher Piping109

Left-Travel Piping110

Right-Travel Piping110

05-M Series Engine WSM117

Before Servicing and Repairing118

Engine Specifications for Construction Machinery119

Engine Electric Components120

Performance Curves121

Dimensions123

Engine (Mechanism Section)125

Piston and Piston Rings129

Lubricating System132

Oil Pump133

Relief Valve133

Oil Filter Cartridge134

Oil Pressure Switch134

Cooling System135

General135

Water Pump135

Radiator (Not Included in the Basic Engine)136

Thermostat136

Radiator Cap137

Air Cleaner (Not Included in the Basic Engine)138

Intake / Exhaust System138

Fuel System139

General139

Injection Pump139

Fuel Filter (Not Included in the Basic Model)142

Injection Nozzle142

Governor143

Automatic Advance Timer (Not Included in the Basic Model)145

Charging System147

Electrical System147

IC Regulator147

Turbo Charger System148

Engine (Service Section)155

Engine Identification162

General162

Model Name and Engine Serial Number162

General Precaution163

Tightening Torques164

Troubleshooting165

Servicing Specifications168

Maintenance Check List177

Check and Maintenance178

Checking and Adjusting191

Compression Pressure191

Engine Body191

Disassembling and Assembling192

Top Clearance192

Draining Water and Oil193

External Components193

Cylinder Head and Valves194

Gear Case196

Piston and Connecting Rod202

Flywheel and Crankshaft205

Servicing207

Timing Gear and Camshaft212

Piston and Connecting Rod214

Checking225

Lubricating System225

Rotor Lobe Clearance225

Servicing225

Clearance between Rotor and Cover226

Thermostat Valve Opening Temperature227

Disassembling and Assembling228

Checking and Adjusting230

Fuel System230

Injection Pump230

Disassembling and Assembling233

Disassembling and Assembling236

Disassembling Motor236

Turbo Charger System245

Disassembling and Assembling247

Features of Hydraulic System251

Hydraulic System (Mechanism Section)251

Performance Curve254

Construction and Behavior256

Operating Principle256

Outline256

Specifications257

General View of Control Valve259

Sectional View261

Service Section264

Arm Regeneration Circuit266

At Neutral Position of Boom Section267

Boom Anti-Fall Valve267

Straight Travel Circuit272

Working Effect272

Simultaneous Operation of Boom & Bucket275

Relief Valve/Anti-Cavitation Valve276

Automatic Air Bleeding in Hydraulic Pilot Section277

Pilot Valve277

Tightening Torque List278

Pilot Valve Control Diagram280

Structure & Specifications284

Swing Motor284

Operating Principle285

Function of Negative Brake287

Structure & Specifications296

U25-3 (Kayaba)296

Specifications297

Operating Principle of Motor298

Operating Principle of Counter Valance Valve299

Function of Hi-Lo Change302

2Nd (High) Speed303

Function of Reduction Gear304

Function of Anti-Cavitation Valve305

Hydraulic Circuit Diagram311

U20-3 Fixed Undercarriage311

U20-3 Retractable Undercarriage312

Hydraulic Components Layout314

U25-3314

Hydraulic System (Service Section)315

Common Circuit317

Hydraulic System (Service Section)317

Swivel Performance323

Traveling Performance329

Specifications333

Swivel Performance337

Traveling Performance338

Cylinder339

Pump Flow344

Testing344

Pressure Measurement345

Drain Measurement351

Swivel Motor352

Measurement of Block Performance353

Operating Speed354

Control and Traveling Lever Operating Force356

Straight Travel Performance356

Control and Traveling Lever Operating Force357

Cylinder Natural Fall Amount357

Lever Stroke357

Rotary Joint (Swivel Joint)409

Traveling Motor413

General Cautions in Disassembling/Reassembling417

Hydraulic Hose448

Other Hydraulic Valve455

Service Section508

Kubota U25-3 - Oil Clearance between Rocker Arm Shaft and Bearing; Oil Clearance between Tappet and Tappet Guide Bore; Push Rod Alignment; Valve Spring Setting Load

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