Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the Z231KW-AU zero turn mower, powered by the Kawasaki FR651V engine and paired with the RCK42P-122Z mower deck. Its 174 pages document every system on the machine, from the engine and hydrostatic transaxle to the electrical wiring and the mower deck.
Each section gives factory structure descriptions, troubleshooting charts, service specifications, and tightening torques. You get exact figures for oil and transaxle capacities, service intervals, spark plug gap, tire pressures, PTO clutch air gap, and blade bolt torque, plus the full wiring diagrams.
Whether you are chasing a no start, servicing the hydrostatic transaxle, or setting the deck blades to spec, this is the same reference a Kubota technician uses. It downloads instantly as a PDF that opens on any device and prints cleanly for the workshop.
Complete the set for your Z231KW-AU
- Operator Manual: Kubota Z231KW-AU Zero Turn Mower Operator Manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 11-20 | Safety First, Working Precautions, Preparing for Emergencies, Working Cautions, Starting Machine Safely, Preventing Fires, Preventing Acid Burns, Avoiding High Pressure Fluid |
| General | 21-43 | Tightening Torques (Stud Bolts, Hydraulic Fittings, Metric Screws, Bolts and Nuts, American Standard Screws, Bolts and Nuts with Unc or Unf Threads, Plugs), Product Identification |
| Maintenance | 44-66 | Lubricants and Fuel, Service Intervals |
| Engine | 67-83 | Fuel System, Lubrication System, Cooling System, Servicing, Troubleshooting, Service Specifications for Engine |
| Transaxle | 84-112 | Hydraulic Circuit of Transaxle, Transaxle Specification, Parking Brake, Servicing |
| Front Axle | 113-119 | Structure of Front Axle, Troubleshooting for Front Axle, Tightening Torques for Front Axle, Separating Front Wheel and Wheel Bracket, Removing Front Wheel, Removing Wheel Bracket |
| Lift System | 120-126 | Structure of Lift System, Troubleshooting for Lift System, Tightening Torques for Lift System, Removing Link Shafts, Removing Mower, Removing Cam, Removing Lift Shafts |
| Electrical System | 127-151 | Wiring Diagram |
| Mower | 152-174 | Power Transmission Flow for Mower, Servicing, Troubleshooting, Service Specifications for Mower, Tightening Torques |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel tank capacity | 13.6 L (3.59 U.S. gals.) | p. 46 |
| Engine crankcase capacity (with filter) | 2.1 L (2.2 U.S.qts.) | p. 46 |
| Engine Oil Capacity (with filter) | 2.1 L | p. 46 |
| Transaxle Oil Capacity | 1.66 L | p. 46 |
| Engine Oil Change Interval | every 100 hr | p. 48 |
| Engine Oil Filter Replacement Interval | every 200 hr | p. 48 |
| Spark Plug Gap | 0.75 mm | p. 57 |
| Front Tire Pressure | 170 kPa | p. 53 |
| Rear Tire Pressure | 83 kPa | p. 53 |
| Electric PTO Clutch Air Gap | 0.4 mm | p. 63 |
| Tension Pulley Bolt Torque | 77.6 to 90.2 N·m | p. 66 |
| Blade Bolt Torque | 102.9 to 117.6 N·m | p. 81 |
