Kubota Wheel Loader R420S R420α R520S R520α workshop service manual

Description Kubota Wheel Loader R420S R420α R520S R520α workshop service manual

Kubota Wheel Loader R420S, R520S, R420 Alpha, R520 Alpha pdf workshop service & repair manual

MANUAL CONTENT:
General
Body and engine identification marks
Safety measures before starting work
Safety measures during work
Preparation for disassembly
Precautions for disassembly and reassembly
Important safety process and critical functional process
Important inspection items after reassembling
Operate the machine and check for unusual noise and vibrations
Make sure the safety decals and wireharness clamps are their specified positions
With the machine front in a specified posture, check the amount of hydraulic oil
Service fundamentals
Service intervals
Lubricants
Notices for servicing items
Tightening torque

Machine Body & Front Attachment
Specifications
Machine Specifications
Main Specification
Installing the frame-related parts (front)
Center pin (important functional component)
Rear frame, center pin
Assembly drawing of the control levers
Installing the control levers
Assembly drawing of accelerator and brake
Installing the brake and inching-related parts
Installing the accelerator-related parts
Installing the seat
Fender
Installing the canopy
Cabin
Heater hose

Engine
Specifications
Engine assy dismounting
Engine accessories
Engine rubber mount
Radiator, oil cooler
Air cleaner
Muffler
Fuel hose route
Engine oil drain hose

Hydraulic System
Troubleshooting
Hydraulic system does not work
Weak lifting, any circuit
Slow lifting, any circuit
Cylinder Fall
Does not travel in both the F and R directions
Insufficient traction force in both the F and R directions
Slow traveling speed in both the F and R directions
Too high starting engine rpm in both the F and R directions
Too low starting engine rpm in both the F and R directions
Difference in starting engine rpm between the F and R directions
Excessive LST brake shock
Insufficient acceleration
Insufficient traction force or traveling rpm in both the F and R directions
Steering system
Specifications
LST System
Steering system
Front Loader
Testing
Pressure Measurement
Flow Rate Measurement
Servicing
Dismounting and mounting LST pump & motor
Repair instructions, LST pump
Repair instructions, LST motor
Control valve servicing
Steering unit
Cylinder servicing

Brake System and power train
Brake system
Negative Brake
Parking Valve
Power train
Front Axle
Rear Axle
Differential Gear (LSD)
Reduction Gear Case Assembly
Differential Ass'y (STD) Assembly
Rear Axle Assembly
Rear Differential Axle
Front Differential Axle Assembly
Planetary Gear Assembly

Electrical System
Testing
Troubleshooting
Battery discharges quickly
Starter does not drive engine properly
Forward and reverse run not selectable
Low-speed hold not effective
Auto lever not effective
Specifications
Service as required
Wire harness installation
Precautions
Wire harness routes
Specifications for electric components and service
Stop switch
Starter switch
Lamp
Indicator-1
Indicator-2
Fuel gauge
Tachometer
Water temperature meter
Hazard switch
Parking switch
Winker switch
Light switch
F-R switch
Horn switch
Relay (starter)
Relay (F-R)
Alternator
Sensor (auto leveler)
Unit (inverter)
Control valve
Horn
Relay (light)
Flasher unit
Relay (flasher R)
Relay (flasher L)
Relay (control valve)
Parking solenoid
Starter
Battery
Earth (battery)
Oil switch
Earth-1
Earth-2
Fusible link (80A)
Fusible link (60A)
Fuse box