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Manuals
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Kubota Manuals
Lawn Mower
Z421-AU
Operator's manual
Kubota Z421-AU Operator's Manual
Zero turn mower
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Safe Operation
Servicing of Machine
Warranty
Scrapping the Machine and Its Procedure
Specifications
Specification Table
Implement Limitations
Instrument Panel and Controls
Instrument Panel, Switches and Hand Controls
Mower
Mower Mounting
Mounting the Mower Deck
Adjusting the Mower
Dismounting the Mower Deck
Operating the Engine
Getting on and off the Machine Safely
Starting the Engine
Choke Knob
Throttle Lever
Key Switch
Check During Operating
Fuel Gauge
Hour Meter
Cold Weather Starting
Warming up the Engine
Warm-Up and Transmission Oil in the Low Temperature Range
Jump Starting
Stopping the Engine
Operating the Machine
Operating a New Machine
Changing Lubricating Oil for New Machine
Engine Break-In
Machine Break-In
Operating the Foldable Rops
Folding the ROPS
Raising the ROPS to the Upright Position
Adjusting the Foldable ROPS
Starting the Machine
Operator's Seat
Seat Belt
Mower Lift Pedal
Throttle Lever
Parking Brake Pedal
Motion Control Lever
Stop Position of the Motion Control Lever
Operating Position of the Motion Control Lever
Stopping the Machine
Parking the Machine
Accessories
Electric Outlet (12 Volt), Plug, Smartphone Holder, Cup Holder and Utility Box
Transporting the Machine
Hydrostatic Transaxle Bypass Rods
Operating the Mower
Mowing Tips
Adjusting the Cutting Height
Operating the Mower
PTO Switch
Starting the Machine
Tires and Wheels
Tires
Inflation Pressure
Wheels
Removing the Front Caster Wheels
Installing the Front Caster Wheels
Maintenance
Service Intervals
Periodic Service Chart Label
Lubricants and Fuel
Periodic Service
Opening the Step
Step
Raising and Lowering the Operator's Seat
Daily Check
Checking the Engine Oil Level
Checking the Amount of Fuel and Refueling
Checking and Cleaning the Air Intake Screen
Checking the Transaxle Fluid Level
Checking the Tire Pressure
Inflation Pressure
Checking the Dial Cam Rotation Strength
Checking Movable Parts
Every 25 Hours
Cleaning the Cylinder and Cylinder Head Fins
Cleaning the Foam Element
Every 50 Hours
Checking the Engine Start System
Checking the OPC System
Greasing
Checking the Muffler and Spark Arrester (if Equipped)
Every 100 Hours
Changing the Engine Oil
Cleaning the Air Cleaner Paper Element
Checking the Spark Plug
Checking the Fuel Filter and Fuel Lines
Checking the Battery Condition
Charging the Battery
Storing the Battery
Adjusting the Throttle Cable
Adjusting the Choke Cable
Greasing Mower Link Bushings
Every 200 Hours or Every 1 Year
Replacing the Air Cleaner Paper Element
Every 200 Hours
Replacing the Fuel Filter
Replacing the Engine Oil Filter
Every 300 Hours
Adjusting the Engine Valve Clearance
Cleaning the Combustion Chamber, Lapping the Valve Seating Surface
Every 400 Hours
Replacing the Transaxle Oil Filter Cartridge
Changing the Transaxle Fluid
Every 500 Hours
Replacing the Spark Plug
Lubricating the Crank Shaft
Every 500 Hours or Every 1 Year
Adjusting the Electric Clutch
Every 1 Year
Checking Fuel Lines
Checking the Muffler and Spark Arrester (if Equipped)
Checking Hydraulic Hoses
Every 4 Years
Replacing Hydraulic Hoses
Replacing Fuel Lines
Service as Required
Replacing Fuses
Checking and Replacing Blades
Replacing the Mower Belt
Adjustment
Motion Control Lever
Adjusting the Motion Control Lever Operating Strength
HST Neutral
Maximum Speed (Forward)
Motion Control Lever Alignment
Checking the Alignment
Aligning the Motion Control Levers
Adjusting the Mower Lift Pedal
Mower Deck Level
Anti-Scalp Rollers
Leveling the Mower Deck (Side-To-Side)
Leveling the Mower Deck (Front-To-Rear)
General Torque Specification
Tightening Torque Chart
Storage
Storing the Machine
Removing the Machine from Storage
Troubleshooting
Engine Troubleshooting
Battery Troubleshooting
Machine Troubleshooting
Mower Troubleshooting
Index
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1
Servicing of Machine
2
Specifications
3
Lubricants and Fuel
4
Checking and Replacing Blades
Download this manual
AV . H . 1 - 1 . - . AK
PRINTED IN U.S.A.
Z
4
1
1
A
U
·
Z
4
2
1
English (Australia)
A
Code No. K3094-7121-1
U
©
KUBOTA Corporation 2017
OPERATOR'S MANUAL
1SQHA00001A01
READ AND SAVE THIS MANUAL
MODELS Z411-AU
Z421-AU
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Table of Contents
Troubleshooting
TROUBLESHOOTING
83
BATTERY TROUBLESHOOTING
85
MOWER TROUBLESHOOTING
86
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Summarization of Contents
Foreword and Safety Introduction
Foreword
Introduction to the Kubota Zero Turn Mower and the importance of the manual.
Safety First
Explains safety symbols (DANGER, WARNING, CAUTION, IMPORTANT, NOTE) used in the manual.
Safe Operation Guidelines
General Safe Operation
Covers general safety practices for operating the machine and work area.
ROPS and Seat Belt Safety
Details safety procedures related to the Roll-Over Protective Structure and seat belt.
Safety for Children, Operators, and Slopes
Addresses safety concerns for children, older operators, and operating on slopes.
Operating the Machine
Engine Operation and Starting
Covers starting the engine, safe getting on/off, and engine checks.
Machine Controls and Operation
Explains the operation of seat belt, pedals, levers, and starting procedures.
Mowing Tips and Cutting Height
Provides guidance on mowing techniques and adjusting cutting height.
Maintenance and Service Schedule
Service Intervals Overview
Outlines the recommended service tasks based on operating hours.
Daily Checks
Details essential checks to perform each day before operating the machine.
Periodic Service Tasks
Covers maintenance tasks required at specific hour intervals (25, 50, 100 hours).
Machine Adjustments
Motion Control Lever Adjustments
Describes how to adjust lever strength, HST neutral, and alignment.
Mower Deck Leveling
Instructions for adjusting mower deck side-to-side and front-to-rear levels.
Troubleshooting Guide
Engine Troubleshooting
Common engine problems and their solutions.
Battery and Machine Troubleshooting
Addresses issues with the battery and general machine operation.
Mower Troubleshooting
Solutions for mower-specific problems like blade issues and uneven cuts.
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