This is the Kubota operator's manual for the ZD1211-AU, ZD1221R-AU, ZD1221L-AU and ZD1221RL-AU zero turn mowers, powered by the Kubota D1105 and D1305 diesel engines. It runs 106 pages, publication number K3444-7126-1.The manual covers the instrument panel and controls, mounting and adjusting the mower deck, starting and operating the diesel engine, and driving the machine, including foldable ROPS operation and seat setup. Periodic service and maintenance chapters give the service intervals, fluid capacities, torque values and checks for the engine, transmission, hydraulics, blades and tires.A troubleshooting section helps trace engine, power train, battery and mower faults. This downloadable PDF puts the factory operating and service information for these ZD models in one file you can keep on hand.
What's Inside This Kubota ZD1211–ZD1221 Series Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safe Operation | 8-19 | General, ROPS, Starting to Operate the Machine, Working the Machine, Safety for Children, Operators, Age 60 Years and Older, Operating on Slopes, Stopping the Machine, Using the PTO, Using the Lift Li |
| Specifications | 22-23 | Specification Table (Engine, Capacities, Dimensions, Weight, Traveling System, Mower, PTO, Pro Commercial Deck) |
| Implement Limitations | 24 | Maximum Loading Weight, Implement Weight W1, Maximum Total Weight, Option: When Using the Hitch Kit (Mower, Dismounting the Mower Deck, Installing Parts to the Mower) |
| Instrument Panel and Controls | 25-26 | Instrument Panel, Switches and Hand Controls, Illustrated Contents, Mower (Rck60P, Rck72P, Rck60R, Rck72R) |
| Mower Mounting | 27-29 | Installation of Skid, Installation of Gauge Wheel, Installation of Bolt (Stopping the Engine, Check During Operating) |
| Operating the Engine | 30-36 | Key Switch (Off, Preheat, Start), Engine Stop Lever, Easy Checker™ (Cold Weather Starting, Warming Up the Engine), Fuel Gauge (Jump Starting), Coolant Temperature Gauge, Hour Meter |
| Operating the Machine | 37-46 | Changing Lubricating Oil for New Machine, Engine Break-In, Machine Break-In, Folding the ROPS, Raising the ROPS to the Upright Position, Foldable ROPS, Operator's Seat, Seat Belt |
| Tires and Wheels | 53-54 | Inflation Pressure, Removing the Front Caster Wheels (Tilting Up the Machine), Installing the Front Caster Wheels (Opening the Lever Guide, Lift-Up Point) |
| Periodic Service | 55-65 | Hood, Front Cover, Step (Daily Check, Lubricants, Fuel and Coolant), Front Side:, Rear Side:, Checking the Engine Oil Level, Checking the Amount of Fuel and Refueling |
| Maintenance | 66-89 | Checking the Engine Start System, Checking the Opc System (Every 50 Hours), Checking Gear Box Oil Level, Greasing, Oiling, Cleaning Air Cleaner Primary Element (Every 100 Hours) |
| Adjustment | 90-96 | HST Neutral, Maximum Speed, Motion Control Lever Operating Strength, Motion Control Lever Alignment (Checking the Alignment, Aligning the Motion Control Levers), Anti-Scalp Rollers |
| Storage | 97-98 | Storing the Machine, Removing the Machine From Storage, Start the Engine |
| Troubleshooting | 99-103 | Engine Troubleshooting (Symptom, Cause, Remedy), Power Train Trouble Shooting, Battery Troubleshooting, Machine Troubleshooting, Mower Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel tank capacity | 49 L (12.9 U.S.gals.) | p. 22 |
| Wheel bolts and nuts tightening torque | 108.5 to 130.2 N⋅m (80 to 96 lbf⋅ft, 11.1 to 13.3 kgf⋅m) | p. 53 |
| Front caster wheels nut tightening torque | 20 to 25 N⋅m (14.8 to 18.4 lbf⋅ft, 2 to 2.5 kgf⋅m) | p. 54 |
| Engine start system check | every 50Hr | p. 66 |
| OPC system check | every 50Hr | p. 66 |
| Engine Coolant Capacity | 3.5 L (3.70 U.S.qts.) | p. 22 |
| Transmission Case Capacity (including rear axle gear case) | 12.1 L (12.8 U.S.qts.) | p. 22 |
| ZD1211-AU, ZD1221R-AU | ||
| Engine crankcase (with filter) capacity | 3.9 L (4.1 U.S.qts.) | p. 22 |
| ZD1211-AU | ||
| Engine Power | 18.5 kW (24.8 HP) | p. 22 |
| Engine Crankcase Capacity (with filter) | 3.9 L (4.1 U.S.qts.) | p. 22 |
| ZD1221R-AU, ZD1221L-AU, ZD1221RL-AU | ||
| Engine Power | 21.7 kW (29.1 HP) | p. 22 |
| Engine Crankcase Capacity (with filter) | 5.7 L (6.0 U.S.qts.) | p. 22 |
Kubota ZD1211–ZD1221 Series Common Problems This Manual Covers
Engine will not start
Air in the fuel, a clogged filter or an unmet safety interlock stops the D1105 or D1305 diesel firing. The troubleshooting section lists starting faults with causes and remedies.
Manual Section: Troubleshooting p. 99Overheating
Low coolant, a clogged radiator screen or a slipping fan belt sends temperatures up on these diesel mowers. Engine troubleshooting covers overheating.
Manual Section: Troubleshooting p. 99Mower will not track straight
Motion control levers out of alignment make the machine drift. The adjustment section covers HST neutral and aligning the motion control levers.
Manual Section: Adjustment p. 90Uneven cut or scalping
Worn blades, the wrong deck height or misset anti-scalp rollers leave an uneven cut. The adjustment section covers the anti-scalp rollers and mower setup.
Manual Section: Adjustment p. 90Weak hydraulic or drive power
Low transmission oil or a clogged HST filter leaves drive and lift feeling weak. Power train troubleshooting is covered in the troubleshooting section.
Manual Section: Troubleshooting p. 99Loose blades and deck vibration
Loose or unbalanced blades set up vibration through the deck. The maintenance section gives the blade bolt torque and mower belt bracket checks.
Manual Section: Maintenance p. 66Frequently Asked Questions
Which mowers does this manual cover?
This operator's manual covers the Kubota ZD1211-AU, ZD1221R-AU, ZD1221L-AU and ZD1221RL-AU zero turn mowers, powered by the Kubota D1105 and D1305 diesel engines. It runs 106 pages.
What are the fuel and coolant capacities?
The fuel tank holds 49 L and the engine coolant capacity is 3.5 L. The specifications section lists these along with the crankcase and transmission capacities. p. 22
What is the blade bolt torque?
The blade bolts tighten to 102.9 to 117.6 N-m. The maintenance section covers blade removal and the mower deck fasteners. p. 66
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