Part of the Kubota Repair Manuals.
This Kubota workshop manual covers the ZD321, ZD323, ZD326 and ZD331 zero-turn mowers and their D782, D902, D1005 and D1305 diesel engines. Its 288 pages are organized into general information, mechanism and servicing for each system on the machine.
Inside you will find engine troubleshooting, servicing specifications and tightening torques, plus full coverage of the transaxle, front axle, hydraulic system, electrical system and rotary mower deck. Factory specifications and allowable limits let you diagnose a fault and rebuild to the correct tolerance.
For an owner or independent shop maintaining these commercial zero-turns, this PDF download is the same technical reference Kubota provides to its service personnel, delivered as a searchable file you can open on any device and print when you need it at the bench.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 14-60 | Cylinder Number, Electrical Parts, Wiring, Battery, Fuse, Connector, Lubricants, Fuel |
| Engine | 61-147 | Troubleshooting, Servicing Specifications, Tightening Torques, Cylinder Head and Valve, Piston and Connecting Rod, Crankshaft |
| Transaxle | 148-200 | Hydrostatic Transmission, PTO System, Parking Brake, Final Reduction Gear, Motion Control Lever, Speed Control Rod, Trunnion Arm |
| Front Axle | 201-211 | Front Wheel, Wheel Bracket, Wheel Hub |
| Hydraulic System | 212-236 | Hydraulic Circuit, Hydraulic Pump, Hydraulic Control Valve, Lift Cylinder, Mower Linkage, Relief Valve, Dial Cam Gear |
| Electrical System | 237-271 | Wiring Diagram, Starting System, Charging System, Gauges, Relay, Starter, Glow Plug, Safety Switch |
| Rotary Mower | 272-288 | Power Transmission, Center Blade, Outer Blade, Universal Joint, Belt Covers, Blade Boss, Gear Box |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| General Use Screws, Bolts and Nuts (M6, No-grade or 4T, Ordinariness) | 7.9 to 9.3 N·m | p. 25 |
| General Use Screws, Bolts and Nuts (M8, No-grade or 4T, Ordinariness) | 18 to 20 N·m | p. 25 |
| Fuel tank capacity | 49 L (13 U.S.gals, 11 Imp.gals) | p. 22 |
| Engine oil change interval | every 100 Hr | p. 27 |
| Engine oil filter replacement interval | every 200 Hr | p. 27 |
| Transmission including rear axle gear case capacity | 12.1 L | p. 22 |
| Mower gear case capacity | 0.4 L | p. 22 |
| Engine Oil Pressure (At Idle Speed) | More than 49 kPa | p. 71 |
| ZD321 | ||
| Engine crankcase (with filter) capacity | 3.5 L (3.70 U.S.qts, 3.08 Imp.qts) | p. 22 |
| Engine crankcase capacity (with filter), ZD321 | 3.5 L | p. 22 |
| ZD323, ZD326 | ||
| Engine crankcase capacity (with filter) (ZD323, ZD326) | 3.9 L | p. 22 |
| ZD331 | ||
| Engine crankcase capacity (with filter), ZD331 | 5.7 L | p. 22 |
