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Kubota WSM ZD321 User Manual

Kubota WSM ZD321
279 pages
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ZD321,ZD326,ZD331
WORKSHOP MANUAL
ZERO TURN MOWER
KiSC issued 04, 2007 A

Table of Contents

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Kubota WSM ZD321 Specifications

General IconGeneral
Fuel TypeDiesel
Engine TypeDiesel
TransmissionHydrostatic
Cutting Width60 inches
TypeZero-Turn Mower
Turning RadiusZero turn

Summary

General

Identification

Details product identification including serial numbers, plates, and hour meter reading.

General Precautions

Guidelines for disassembly, tool usage, part handling, O-rings, snap rings, and hydraulic fluid.

Handling Precautions for Electrical Parts and Wiring

Safety measures for electrical components and wiring to prevent damage and ensure proper connection.

Lubricants, Fuel and Coolant

Specifications for fuel types, coolant, engine oil, and transmission fluid capacities and types.

Tightening Torques

Specified torque values for general use screws, bolts, nuts, and specific engine components.

Maintenance Check List

Schedule of maintenance tasks and their intervals, referencing specific pages for procedures.

Check and Maintenance

Procedures for daily checks and periodic maintenance tasks on various machine systems.

Special Tools

List and descriptions of specialized tools required for engine and machine maintenance procedures.

Implement Limitations

Maximum loading weights and specifications for implements used with the tractor.

Engine

Troubleshooting

Common engine symptoms, probable causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Factory specifications and allowable limits for various engine components and systems.

Tightening Torques

Specific torque values for engine screws, bolts, and nuts for different engine models.

Checking, Disassembling and Servicing

Procedures for checking, disassembling, and servicing engine components like cylinder head and valves.

Transaxle

Structure

Overview of the transaxle assembly and its main sections: bevel gear, PTO, hydrostatic, brake, and reduction gears.

Travelling System

Details on the hydrostatic transmission, its structure, operation, control linkage, and parking brake.

Servicing

Procedures for checking and servicing hydrostatic transmission, gears, PTO clutch, and brake components.

Troubleshooting

Common transaxle symptoms, probable causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Specifications for transaxle components like pressure, speed, alignment, and gear backlash.

Tightening Torques

Specified torque values for transaxle mounting screws and bolts.

Checking and Adjusting

Procedures for checking neutral, adjusting speeds, and aligning motion control levers.

Disassembling and Assembling

Step-by-step guides for disassembling and assembling transaxle components like battery, fuel tank, and engine.

Front Axle

Structure

Description of the front axle construction, support, and steering stability.

Troubleshooting

Common front axle symptoms, probable causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Specifications for front axle end play.

Tightening Torques

Specified torque values for front axle mounting screws and nuts.

Checking, Disassembling and Servicing

Procedures for checking and adjusting the front axle pivot and assembly.

Hydraulic System

Hydraulic Circuit

Diagram and explanation of the machine's hydraulic system, pump, control valve, and cylinder functions.

Hydraulic Pump

Description of the hydraulic pump structure and its displacement specifications.

Hydraulic Control Valve

Explanation of the hydraulic control valve operation in neutral, lift, and down modes.

Lift Cylinder

Description of the lift cylinder components and its single-acting type.

Mower Linkage

Explanation of how the mower lifting is performed by the hydraulic system and cutting height adjustment.

Servicing

Procedures for servicing hydraulic system components including troubleshooting, specifications, and torques.

Troubleshooting

Common hydraulic system symptoms, probable causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Specifications for the relief valve setting pressure at different engine speeds.

Tightening Torques

Specified torque values for hydraulic system components like control valve and pump mounting screws.

Checking, Disassembling and Servicing

Procedures for checking, disassembling, and servicing hydraulic system components like control valve and pump.

Electrical System

Wiring Diagram

Diagram illustrating the electrical system connections, wire colors, and component locations.

Starting System

Explanation of the starting system's operation, components, and safety switch functions.

Charging System

Explanation of the charging system, consisting of AC dynamo, regulator, and related components.

Gauges

Explanation of how fuel quantity and coolant temperature are indicated by gauges and sensors.

Troubleshooting

Common electrical system symptoms, causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Specifications for battery voltage, glow plug resistance, and AC dynamo output.

Tightening Torques

Specified torque values for starter and AC dynamo mounting hardware.

Checking, Disassembling and Servicing

Procedures for checking, disassembling, and servicing electrical system components like battery and switches.

Rotary Mower

Power Transmission

Description of power transmission path from PTO shaft to mower blades and components involved.

Troubleshooting

Common mower issues, probable causes, solutions, and reference pages for diagnostics.

Servicing Specifications

Specifications for pinion shaft, bevel gears, and blade tip differences for mower performance.

Tightening Torques

Specified torque values for mower blade, gear box, and pulley mounting hardware.

Checking, Disassembling and Assembling

Procedures for adjusting anti-scalp rollers, cutting height, and disassembling mower components.

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