Kubota WSM Instruction manual

ZD18(F),ZD21(F),
ZD25F,ZD28(F)
WORKSHOP MANUAL
ZERO TURN MOWER
KiSC issued 04, 2009 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of ZD18(F), ZD21(F) and
ZD28(F) KUBOTA ZD Series ZERO-TURN MOWER. It is divided into two parts,
“Mechanism” and “Servicing” for each section.
Mechanism
Information on the Features and New Mechanisms are described. This information
should be understood before proceeding with troubleshooting, disassembling and
servicing.
Servicing
The heading “General” includes general precautions, check and maintenance and
special tools. Other section, there are troubleshooting, checking and adjusting,
disassembling and assembling, and servicing which cover procedures, precautions,
factory specifications and allowable limits.
All information illustrations and specifications contained in this manual are based on
the latest product information available at the time of publication. The right is reserved
to make changes in all information at any time without notice.
March 2002
© KUBOTA Corporation 2002
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
BEFORE SERVICING AND REPAIRING
• Read all instructions and safety instructions in this
manual and on your generator safety decals.
• Clean the work area and generator.
• Park the machine on a firm and level ground, and set
the parking brake.
• Lower the implement to the ground.
• Stop the engine, and remove the key.
• Disconnect the battery negative cable.
• Hang a “DO NOT OPERATE” tag in operator station.
SAFETY FIRST
This symbol, the industry’s “Safety Alert Symbol”, is used throughout this manual and on labels on
the machine itself to warn of the possibility of personal injury. Read these instructions carefully.
It is essential that you read the instructions and safety regulations before you attempt to repair or use
this unit.
DANGER : Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING : Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION : Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury.
IMPORTANT : Indicates that equipment or property damage could result if instructions are not
followed.
NOTE : Gives helpful information.
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.
• Do not alter or remove any part of machine safety
system.
• Before starting the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
• Never start the engine while standing on ground.
Start the engine only from operator’s seat.
SAFETY WORKING
• Do not work on the machine while under the influence
of alcohol, medication, or other substances or while
fatigued.
• Wear close fitting clothing and safety equipment
appropriate to the job.
• Use tools appropriate to the work. Makeshift tools,
parts, and procedures are not recommended.
• When servicing is performed together by two or more
persons, take care to perform all work safely.
• Do not work under the machine that is supported
solely by a jack. Always support the machine by
safety stands.
• Do not touch the rotating or hot parts while the engine
is running.
• Never remove the radiator cap while the engine is
running, or immediately after stopping. Otherwise,
hot water will spout out from radiator. Only remove
radiator cap when cool enough to touch with bare
hands. Slowly loosen the cap to first stop to relieve
pressure before removing completely.
• Escaping fluid (fuel or hydraulic oil) under pressure
can penetrate the skin causing serious injury. Relieve
pressure before disconnecting hydraulic or fuel lines.
Tighten all connections before applying pressure.
AVOID FIRES
• Fuel is extremely flammable and explosive under
certain conditions. Do not smoke or allow flames or
sparks in your working area.
• To avoid sparks from an accidental short circuit,
always disconnect the battery negative cable first and
connect it last.
• Battery gas can explode. Keep sparks and open
flame away from the top of battery, especially when
charging the battery.
• Mark sure that no fuel has been spilled on the engine.
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
VENTILATE WORK AREA
• If the engine must be running to do some work, make
sure the area is well ventilated. Never run the engine
in a closed area. The exhaust gas contains
poisonous carbon monoxide.
PREVENT ACID BURNS
• Sulfuric acid in battery electrolyte is poisonous. It is
strong enough to burn skin, clothing and cause
blindness if splashed into eyes. Keep electrolyte
away from eyes, hands and clothing. If you spill
electrolyte on yourself, flush with water, and get
medical attention immediately.
DISPOSE OF FLUIDS PROPERLY
• Do not pour fluids into the ground, down a drain, or
into a stream, pond, or lake. Observe relevant
environmental protection regulations when disposing
of oil, fuel, coolant, electrolyte and other harmful
waste.
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher handy at all
times.
• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
· The following safety decals are installed on the machine.
If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed
in the parts list.
[ZD18 · ZD21 · ZD28]
SAFETY DECALS
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
[ZD18F · ZD21F · ZD28F]
KiSC issued 04, 2009 A

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ZD18(F) · ZD21(F) · ZD28(F), WSM SAFETY INSTRUCTIONS
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(1)
KiSC issued 04, 2009 A