Kubota ZD321, ZD323, ZD326, ZD331 Zero-Turn Mowers OEM Service & Repair Manual

ZD321 , ZD323, ZD326, ZD331 , 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. • NOTE : Gives helpful information . BEFORE SERVICING AND REPAIRING • 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. o Lower the implement to the ground. o Stop the engine. and remove the key. o Disconnect the battery negative cable. • Hang a ''~O NOT OPERATEn tag in operator station. 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.

ZD321 , ZD323, ZD326, ZD331, 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

ZD321 , ZD323, ZD326, ZD331 , 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

Z0321, Z0323, Z0326, Z0331, 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

ZD321 , ZD323, ZD326, ZD331, 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. (1) Part No. K3181-6585-1 (2) Part No. K3181-6584-1 1BDABCQAP094A (3) Part No. K3181-6582-1 1BOABCQAP095A 3GZAAAGCPOO1 A 5

Z0321, Z0323, Z0326, Z0331, WSM SAFETY INSTRUCTIONS (1) Part No. K3181-6587-1 (2) Part No. K3181-6583-1 Oiesel fuel No fire only DIESEL 1BDABCQAP099A (3) Part No. K3181-6532-1 1 BDABCQAP1 03A ~fMi!Mfu; APRECAUCION 1BDABCQAP1 02A (4) Part No. K3181-6564-1 (5) Part No. K3181-6563-1 (6) Part No. K3181-6566-1 (7) Part No. K3181-6565-1 1BDABCQAP100A 3GZAAAGCP002A 1BOABCOAPl34A 6

ZD321, ZD323, ZD326, ZD331, WSM SAFETY INSTRUCTIONS (1) Part No. K3111-6591-1 (2) Part No. K3181-6586-1 Do not get your hands close to fan belt. Do not get your hands close to engine fan and fan belt. 1BDABCQAP107A (3) Part No. K3181-6115-1 1BDABCQAP124A 3GZAAAGCP003A 7

ZD321 , ZD323, ZD326, ZD331 , WSM SAFETY INSTRUCTIONS (4) (4) (5) (1) Part No. K5681-7312-1 (4) Part No. K3181-2481-1 (2) Part No. K5681-7311-1 (5) Part No. K3181-6532-1 (3) Part No. K5681-731 0-1 1BDABCQAP1 02A 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. 3GZAAAGCP004A 8

ZD321 , ZD323, ZD326, ZD331, WSM SPECIFICATIONS SPECIFICATIONS Engine Model Model Maximum engine power (Gross) Type Number of cylinders Bore and stroke Total displacement Rated revolution Fuel ZD321N I ZD321 D782-E3-Z0 15.7 kW (21 HP)'1 67 x 73.6 mm (2.64 x 2.90 in.) ZD323 D902-E3- ZO 16.9 kW (23 HP)'1 72 x 73.6 mm (2.83 x 2.90 in.) 898cm 3 ZD326S I ZD326P D1005-E3-ZD-2 19.4 kW (26 HP)'1 Liquid-cooled 3 76 x 73.6 mm (2.99 x 2.90 in.) 778 cm 3 (47.5 cu.in.) (54.8 1001 cm 3 (61.1 cu.in.) cu.in.} 3200 min'1 (rpm) Diesel fuel No.1 [below 10°C (14 OF)] Diesel fuel No.2 [above 10°C (14 OF)] ZD331P I ZD331lP D 1305-E3-ZD 23.1 kW (31 HP)'1 78 x 88.0 mm (3.07 x 3.46 in.) 1261 cm 3 (77.0 cu.in.) 3000 min- 1 (rpm) i ! Starter Electric starter with battery, glow plug, 12 V, 1.1 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 49 L (13 U.S.gals, 11 Imp.gals) 3.5L 3.9 L Engine crankcase (with filter) (3.70 U.S.qts, 3.08 Imp.qts) (4.1 U.S.qts, 3.4 Imp.qts) Capacities 2.7 L Engine coolant (2.85 U.S.qts, 2.38 Imp.qts) 3.5 L (3.70 U.S.qts, 3.08 Imp.qts) Dimensions Recovery tank Transmission including rear axle gear case Overall length Overall width Without mower deck Overall height Wheel base With ROPS upright With ROPS folded Minimum ground clearance Front Tread Rear 2185 mm (56.0 in.) 1365mm 1 (53.7 in.) 130 mm (5.12 in.) with 54 in., 60 in. 1100 mm 1 (43.3 in.) I 0.25 L (0.26 U.S.qts, 0.22 Imp.qts) 12.1 L (12.8 U.S.qts, 10.6Imp.qts)'3 2220 mm (87.4 in.) 1460 mm (57.5 in.) 1915 mm (75.4 in.) 1555 mm (61.2 in.) 1410 mm (55.5 in.) 130 mm (5.12 in.) with 60 in. 975 mm (38.4 in.) 1150 mm (45.3 in.) I 5.7 L (6.0 U.S.qts, 5.0 Imp.qts) I 2335mm (91.9 in.) / 1525 mm (60.0 in.) 130 mm (5.12 in.) with 60 in., 72 in. 1 1070 mm (42.1 in.) NOTE: Specifications and design subject to change without notice. N : Narrow tread S: Special P : Semi-pneumatic Non Flat Tire LP : Long wheel base and equipped with 72 in. mower. '1 : Manufacurer's estimate '2: At 3200 min- 1 (rpm) [ZD321, ZD323, ZD326] At 3000 min- 1 (rpm) [ZD331] '3 : Oil amount when the oil level is at the upper level. 9

ZD321 , ZD323, ZD326, ZD331, WSM SPECIFICATIONS Model ZD321N ZD321 ZD323 ZD326S ZD326P ZD331P ZD331LP Weight (with Mower Deck) 730 kg (1609Ibs) with 54 in. 755 kg (1664Ibs) with 60 in. 788 kg (1738Ibs) with 60 in. 798 kg (1759Ibs) with 60 in. 813 kg (1792Ibs) with 60 in. 820 kg (1808Ibs) with 60 in. 845 kg (1863Ibs) with 72 in. Travelling system Tires Front 15 x 6.0-6 (4PR) Rib 15 x 6.0-6 (Semi-pneumatic Non Flat Tire) Rib Rear 26 x 10.5- 12 (4PR) Turf 26 x 12.0-12 (4PR) Turf Travelling speeds Forward o to 15.0 km/h (0 to 9.3 mph}'z o to 17.0 km/h (0 to 10.6 mph)'z Reverse o to 8.3 km/h (0 to 5.2 mphj'Z o to 8.5 km/h (0 to 5.3 mph>,2 Steering 2-Hand levers Transmission 2-Hydrostatic transmission with gear Parking brake Wet multi disc I foot applied, released Min. turning radius o mm (0 in.) PTa Revolution 1 speed (2530 rpm at 3200 engine rpm) 1 speed (2538 rpm at 3000 engine rpm) Drive system Shaft drive, KUBOTA 10 tooth in involute spline Clutch type Wet multi discs PTO brake Wet single disc NOTE: Specifications and design subject to change without notice. N : Narrow tread S: Special P : Semi-pneumatic Non Flat Tire LP : Long wheel base and equipped with 72 in. mower. *1 : Manufacurer's estimate *2: At 3200 min- 1 (rpm) [ZD321, ZD323, ZD326] At 3000 min- 1 (rpm) [ZD331] *3 : Oil amount when the oil level is at the upper level. W1030228 Model RCK54P-321Z RCK60P-331Z RCK72P·331Z I PRO commercial deck (fabricated deck) Suitable machine ZD321N ZD321, ZD323, ZD326S, ZD326P, ZD331 P ZD331LP Mounting method Quick joint, parallel linkage Adjustment of cutting height Dial gauge Cutting width 1375 mm (54 in.) 1524 mm (60.0 in.) 1829 mm (72.0 in.) Cutting height 25 to 127 mm (1.0 to 5.0 in.) Weight (approx.) 128 kg (281 Ibs) 148 kg (327 Ibs) 169 kg (373Ibs) Blade spindle speed 58.8 rls (3530 min- 1 (rpm))'l 56.0 rls (3360 min- 1 (rpm»,1 47.2 rls (2830 min- 1 (rpm))*l Blade tip velocity 87.8 m/s (17300 fpmj'1 92.0 m/s (18100 fpmj'1 92.6 m/s (18200 fpmj'1 Blade length 475 mm (18.7 in.) 523 mm (20.6 in.) 625 mm (24.6 in.) Number of blades 3 Dimensions Total length 940 mm (37.0 in.) 1002 mm (39.4 in.) 1170 mm (46.1 in.) Total width 1704 mm (67.1 in.) 1911 mm (75.2 in.) 2224 mm (87.6 in.) Total height 353 mm (13.9 in.) 358 mm (14.1 in.) NOTE: Specifications and design subject to change without notice. *1 : Engine max. revolution. W1036076 10

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Kubota ZD321, ZD323, ZD326, ZD331 Zero-Turn Mowers OEM Service & Repair Manual

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