Kubota Tractor Models B5100, B6100, B7100 Workshop Service Manual

Kubota Tractor Models B5100, B6100, B7100 Workshop Service Manual.

442 Pages

This manual is available in: Digital Download

CONTENTS

PREPARATORY STEPS FOR DISASSEMBLY AND SERVICING

SEPARATION OF FRONT WHEEL SYSTEM

SEPARATION OF ENGINE

SEPARATION OF ENGINE AND CLUTCH HOUSING

SEPARATION OF TRANSMISSION AND CLUTCH HOUSING CASE

ENGINE

DISASSEMBLY

CYLINDER HEAD

FUEL PUMP, INJECTION PUMP

GEAR CASE COVER, CAMSHAFT, OIL PUMP

PISTON, CRANKSHAFT

SERVICING

MEASUREMENT OF PRESSURES

• (1) Checking the radiator cap
• (2) Checking the radiator cooling system
• (3) Checking the engine oil pressure
• (4) Compression pressure
• (5) Injection pressure
• (6) Checking the injection timing

CYLINDER HEAD

• (1) Valve clearance
• (2) Decompression clearance
• (3) Top clearance
• (4) Trueness of valve spring
• (5) Free length of valve spring
• (6) Valve spring tension
• (7) Distortion of cylinder head
• (8) Valve sinkage
• (9) Dimensions of intake and exhaust valve seats
• (10) Valve stem guide clearance
• (11) Total length of push-rod

PISTONS AND CYLINDERS

• (1) Piston ring gap
• (2) Wear of cylinder liners
• (3) Piston standard outside diameter

CONNECTING RODS

• (1) Clearance between piston pin and bushing
• (2) Inside diameter of connecting rod big-end
• (3) Bend or twist in connecting rods
• (4) Connecting rod axial clearance

CRANKSHAFT

• (1) Bend in crankshaft
• (2) Wear of crank journal and crank pin
• (3) Oil clearance of crankshaft metal
• (4) Oil clearance of crank pin metal
• (5) Crankshaft side clearance
• (6) Trueness of crankshaft and flywheel

CAMSHAFT

• (1) Wear of camshaft cam
• (2) Wear of camshaft journal
• (3) Bend of camshaft
• (4) Wear of fuel camshaft cam
• (5) Backlash of idle gear
• (6) Side clearance of camshaft
• (7) Side clearance of idle gear
• (8) Side clearance of fuel camshaft

OIL PUMP

• (1) Gap between inner and outer rotors of the trochoid pump
• (2) Gap between trochoid pump and its outer rotor

TROUBLE SHOOTING

EXPLODED VIEW

TRACTOR BODY DISASSEMBLY

FRONT WHEEL SYSTEM

CLUTCH SYSTEM

STEERING SYSTEM

TRANSMISSION SYSTEM

BRAKE SYSTEM

SERVICING

FRONT WHEEL SYSTEM

1-1 CENTER PIN AND KING PIN

• (1) Inner diameter of center pin bushing
• (2) Outer diameter of center pin
• (3) Inner diameter of king pin bushing
• (4) Outer diameter of king pin

1-2 FRONT WHEEL DIFFERENTIAL GEAR

• (1) Backlash between front wheel spiral bevel gear and pinion shaft

1-3 WHEEL ALIGNMENT

• (1) Toe-in
• (2) Rolling angle
• (3) Front wheel steering angle
• (4) Tire pressure

CLUTCH SYSTEM

2-1 CLUTCH LEVERS, CLUTCH DISC AND PRESSURE PLATE

• (1) Height of clutch lever
• (2) Clutch disc
• (3) Wear, scratches and cracks on pressure plate

2-2 RELEASE BEARING, CLUTCH PEDAL AND DRIVE BEARING

• (1) Release bearing (Thrust ball bearing)
• (2) Clutch pedal
• (3) Dry bearing

STEERING SYSTEM

3-1 STEERING WHEEL AND STEERING SHAFT

• (1) Adjusting play of steering wheel
• (2) Smoothness of steering wheel turning
• (3) Axial play of steering shaft

TRANSMISSION SYSTEM

4-1 TRANSMISSION GEAR, AND BUSHING AND TRANSMISSION SHAFT

• (1) Backlash between spiral bevel gear and spiral bevel pinion
• (2) Gear backlash
• (3) Gap between 3rd shaft and its 29T dual gear bushing

4-2 GEAR BUSHING AND SHAFT, AND SPRING

• (1) Backlash between differential pinion and differential side gear
• (2) Gap between differential pinion and differential pinion shaft
• (3) Gap between differential side gear and differential case
• (4) Thickness of differential side gear shim and differential pinion thrust collar
• (5) Free length of differential lock return spring

BRAKE SYSTEM

5-1 BRAKE LININGS, BRAKE DRUMS AND PEDALS

• (1) Play of brake pedal
• (2) Wear of brake lining
• (3) Wear of brake drum
• (4) Adjusting differential lock pedal

TROUBLE SHOOTING

EXPLODED VIEW

HYDRAULIC POWER SYSTEM

DISASSEMBLY

SEPARATION OF CONTROL VALVE, AND HYDRAULIC CYLINDER

SEPARATION OF GEAR PUMP

SERVICING

CONTROL VALVE

• (1) Relief valve set pressure
• (2) Implement lowering speed adjusting bolt
• (3) Burrs on control valve body, foreign matter in oil passage
• (4) Spool surface
• (5) Contact between relief valve holder and ball
• (6) Damage or deformation in relief valve spring
• (7) Position of interlocker

HYDRAULIC CYLINDER

• (1) Internal wear and scratch on hydraulic cylinder
• (2) Hydraulic piston and O-ring
• (3) Wear in hydraulic arm shaft bushing
• (4) Hydraulic arm shaft
• (5) Lift arm play

GEAR PUMP

• (1) Scratches on pump body
• (2) Wear on bushing
• (3) Wear in length or thickness of bushing
• (4) Wear on drive shaft and idler shaft
• (5) Gap between gear top and pump body

TROUBLE SHOOTING

EXPLODED VIEW

ELECTRICAL SYSTEM

DISASSEMBLY

BATTERY

DETACHMENT OF STARTER

STARTER

DETACHMENT OF AC DYNAMO

SERVICING

BATTERY CHECK

• (1) Loose terminal and bolt
• (2) Battery and earth
• (3) Electrolyte
• (4) Specific gravity of electrolyte
• (5) Battery

BATTERY RECHARGING

• (1) Recharging (constant-current recharging)
• (2) Recharging (quick recharging)

STARTER CONDUCTIVITY TEST, NO-LOAD TEST AND MOTORING TEST

• (1) Conductivity of wiring before starter
• (2) Motoring test
• (3) No-load test

STARTER (MAGNET SWITCH, PINION GEAR, FIELD COIL, BRUSH)

• (1) Suction test for magnet switch pull-in coil
• (2) Holding test for magnet switch holding coil
• (3) Return of magnet switch plunger
• (4) Pinion gap
• (5) Commutator undercut, short and bushings
• (6) Bend in armature
• (7) Short-circuit of armature coil
• (8) Disconnection of armature coil
• (9) Earth of armature coil
• (10) Partial wear of commutator
• (11) Mica (undercut)
• (12) Disconnection in field coil
• (13) Insulation of field coil yoke
• (14) Wear of brush
• (15) Brush spring pressure
• (16) Brush holder

AC DYNAMO NO-LOAD TEST AND BATTERY CHARGING CURRENT MEASUREMENT

• (1) Measuring battery charging current
• (2) Measuring AC dynamo voltage at no load

RECTIFIER, SWITCHES AND OTHER PARTS

• (1) Rectifier
• (2) Main switch
• (3) Safety switch
• (4) Lamp switch
• (5) Flasher lamp switch
• (6) Flasher unit
• (7) Glow plug
• (8) Glow plug indicator
• (9) Oil switch
• (10) Horn switch
• (11) Horn
• (12) Oil pressure indicator lamp

TROUBLE SHOOTING

EXPLODED VIEW

Manual Code: 97897- 10502

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