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KUBOTA ZD221 ZERO TURN MOWER Workshop Service Manual
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ZD221, WSM
SAFETY INSTRUCTIONS
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.
A DANGER : Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
A WARNING : Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
A 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.
BEFORE SERVICING AND REPAIRING
o Read all instructions and safety instructions in this
manual and on your machine safety decals.
• Clean the work area and machine.
• Park the machine on a firm and level ground. and set
the parking brake.
• Lower the implement to the ground.
o Stop the engine. and remove the key.
o Disconnect the battery negative cable.
• Hang a ''~O NOT OPERATE" tag in operator
station.
1

ZD221 , 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.
• Do not open high-pressure fuel system.
High-pressure fluid remaining in fuel lines can cause
serious injury. Do not disconnect or attempt repair
fuel lines, sensors, or any other components between
the high-pressure fuel pump and injectors on engines
with high pressure common rail fuel system.
• High voltage exceeding 100 V is generated in the
ECU, and is applied to the injector.
Pay sufficient caution to electric shock when
performing work activities.
2

ZD221, WSM SAFETY INSTRUCTIONS
•
+
-
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.
• Make sure that no fuel has been spilled on the engine.
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.
3

ZD221 , WSM
SAFETY INSTRUCTIONS
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.
4

ZD221. WSM SAFETY INSTRUCTIONS
SAFETY DECALS
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.
(2) Part No. K3271-6585-1
(3) Part No. K3271-6581-0
(1) Part No. K3181-6585-0
1BDABCQAP093A
(4) Part No. K3271-6587-0
1BDABCYAP064A
I 3GZAAAKCP001 A
1BDABCYAP065A
(5) Part No. K3131-6568-1
ACAUTION
\NIlen Engine IS running
do not open thiS cover
1BDABDEAP024A
(6) Part No. K3131-6569-1
A PRECAUCION
Nunca abra el capo mlentras el
motor esta en funClonamlento
1BDABDEAP025A
5

ZD221, WSM
SAFETY INSTRUCTIONS
(1) Part No. K3271-6583-0
1 BDABCYAP066A
(3) Part No. K3181-6587-2
Gasoline No fire
fuel only
it
~
LOW SULFUR FUEL
OR ULTRA LOW
: SULFUR FUEL ONLY
COMBUSTIBLE CON
BAJO CONTENIDO
DE AZUFRE 0
COMBUSTIBLE CON
CONTENIOO ULTRABAJO
DE AZUFRE SOLAMENTE
1BDAIATAPOO1A
3GZAAAKCP002A
(2) Part No. K3271-6532-0
[r~tiQ-.U T-IO-N-r-: A-P-R-EC-A-UCION' ...
l~Jn·)I:t3:t41~il •
ESCAPE CALIENTE
...........--- :.. ./
1BDABCYAP067 A
(4) Part No. K3181-2481-1
...:1.=..BD::.oA.:.;;:B;.::C.:;;.QA;.;;;P...:1.;;;;;22A;;;..;;..._________--'
6

ZD221 , WSM
SAFETY INSTRUCTIONS
(1) Part No. K3181-6564-0 (2) Part No. K3181-6563-0 (3) Part No. K3181-6566-0 (4) Part No. K3181-6565-0
AWARNING AADVERTENCIA
[ 1'~ I [ l?~ I
~4 ~4
1BDABCQAP100A
1BDABCQAP134A
3GZAAAKCP003A
7

ZD221 , WSM
SAFETY INSTRUCTIONS
1 BDABCQAP124A
(1) Part No. K3181-6115-1
DANGER I POISON
· SHIELD EYES
EXPLOSIVEGASES can cause blindness or injury.
· NO SPARKS I FLAMES I SMOKING
· SULFURIC ACID can cause blindness or
servere burns.
· Flush eyes immediately with water.
· Get medical help fast.
(2) Part No. K3111-6591-1
Do not get your hands close to fan belt.
(3) Part No. K3181-6586-1
Do not get your hands close to engine fan and fan belt.
1BDABCOAP10SA
1BDABCOAP1Q7A
3GZAAAKCP004A
8

ZD221 , WSM
SAFETY INSTRUCTIONS
(1) Part No. KS681-7312-0 (2) Part No. KS681-7311-0 (3) Part No. KS681-7310-0
CARE OF DANGER, WARNING AND CAUTION LABELS
1. Keep danger, warning and caution labels clean and free from obstructing material.
2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing danger, warning and caution labels with new labels.
4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new
label(s) is(are) attached in the same location(s) as the replaced component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any
bubbles to outside edge.
3GZAAAKCPOOSA
9

ZD221 , WSM SPECIFICATIOI\lS
SPECIFICATIONS
Model ZD221-48
I
Z022i·54
Model D782-E3-ZD-1
Maximum engine power
(Gross)
15.7 kW (21 HP)'1
Type Liquid-cooled
Number of cylinders 3
Bore and stroke
67 x 73.6 mm
(2.64 x 2.90 in.)
Engine
I Total displacement 778 cm
3
(47.5 cu.in.)
Rated revolution 3200 min-
1
(rpm)
Fuel
Diesel fuel No.1 [below - 10°C (14 OF)]
Diesel fuel No.2 [above 10°C (14 OF)]
Starter Electric starter with battery, glow plug, 12 V, 1.0 kW
Lubrication Forced lubrication by gear pump
Cooling Liquid with pressurized radiator
Battery 51 R (12 V, RC : 70 min, CCA: 450 A)
Fuel tank 23 L (6.1 U.S.gals, 5.1 Imp.gals)
Engine crankcase 3.5 L
(with filter) (3.70 U.S.qts, 3.08 Imp.qts)
Capacities Engine coolant
1.2 L
(1.27 U.S.qts, 1.06 Imp.qts)
Recovery tank 0.25 L (0.26 U.S.qts, 0.22 Imp.qts)
Transmission including rear
axle gear case
7.5 L (7.9 U.S.qts, 6.60 Imp.qts)'3
Overall length 2130 mm (83.9 in.)
erall width Without mower
ck
1210 mm (47.7 in.)
Overall
With ROPS
upright
1775 mm (69.9 in.)
Dimensions
height
With ROPS
folded
1320 mm (51.9 in.)
Wheelbase 1295 mm (51.0 in.)
Minimum ground clearance
130 mm (5.12 in.)
with 54 in., with 48 in.
Front 860 mm (33.9 in.)
Tread
Rear 930 mm (36.3 in.)
NOTE: Specifications and design subject to change without notice.
'1 : Manufacurer's estimate
'2 : At 3200 min-
1
(rpm)
*3: Oil amount when the oil level is at the upper level.
10
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Get access to a comprehensive workshop service manual for your Kubota equipment. This manual provides detailed servicing instructions, step-by-step repair information, preventative maintenance, and troubleshooting procedures. With 262 pages, it includes in-depth guidance on the engine, transaxle, front axle, hydraulic system, electrical components, and mower deck.
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