Part of the Kubota Repair Manuals.
This downloadable PDF is the factory Kubota Z122R workshop manual, 153 pages covering the Z122R-AU and Z122RKW-AU zero turn mowers. These machines run the air cooled Kawasaki GH739V petrol engine.
The manual covers the engine, the hydrostatic transaxle, front axle, lift system, the electrical system with wiring diagrams and safety switches, and the mower deck itself. You get structure descriptions, troubleshooting charts, servicing specifications, tightening torques, and checking and disassembly procedures for each system.
Owners and small engine mechanics can use it to trace no start and safety switch faults, service the transaxle, set the deck level, replace belts and blades, and keep the Kawasaki engine running right. Every procedure is tied to factory figures. View it on any device, or print the pages you need for the shop bench.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Record of Revisions | 3 | |
| Information | 4-16 | |
| General | 17-50 | Identification (Serial Number), Handling Precautions for Electrical Parts and Wiring, Battery, Fuse, Connector, Handling of Circuit Tester, Color of Wiring, Lubricants and Fuel |
| Engine | 51-67 | Fuel System, Fuel Line, Lubrication System |
| Transaxle | 68-91 | Hydraulic Circuit, External Components, Inner Components, Parking Brake |
| Front Axle | 92-98 | Separating Front Wheel and Wheel Bracket, Front Wheels Wander to Right or Left, Tightening Torques of Screws, Bolts and Nuts, Remove Wheel Bracket |
| Lift System | 99-105 | Removing Link Shafts, Mower Does Not Lift, Mower Does Not Lower, Tightening Torques of Screws, Bolts and Nuts, Removing the Mower, Removing Front Link Shaft, Removing Cam |
| Electrical System | 106-135 | Wiring Diagram, Start System and Opc, Safety Switches, Relay, Charging System, Hour Meter, Head Light and PTO Clutch, Troubleshooting |
| Mower | 136-153 | Power Transmission, Dismounting the Mower Deck, Disassembling the Mower, Blade Does Not Turn, Blade Speed Is Slow, Mower Is Not Lifted, Mower Belt Slipping, Discharge Chute Plugged |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel tank capacity | 12.2 L (3.22 U.S. gals, 2.68 Imp.gals) | p. 26 |
| Engine crankcase oil capacity | 2.1 L (2.2 U.S.qts, 1.8 Imp.qts) | p. 26 |
| Max engine power | 15.0 kW (21.5 HP) | p. 14 |
| Fuel tank capacity | 12.2 L (3.23 U.S. gals, 2.68 Imp. gals) | p. 14 |
| Engine crankcase capacity | 2.1 L (2.2 U.S. qts, 1.8 Imp. qts) | p. 14 |
| Transaxle oil capacity | 1.66 L (1.75 U.S. qts, 1.46 Imp. qts) | p. 14 |
| Front tire pressure | 170 kPa (24.7 psi) | p. 34 |
| Rear tire pressure | 83 kPa (12.0 psi) | p. 34 |
| Battery nominal voltage | 12V | p. 42 |
| Battery cold cranking amps | 300 A | p. 42 |
| Engine oil change interval | every 50 hours | p. 30 |
| Spark plug check interval | every 100 hours | p. 30 |
