Part of the Kubota Repair Manuals.
This Kubota ZD25F Workshop Manual is the 234-page factory service manual for the ZD25F zero-turn mower, powered by the Kubota D1005-E2-ZD three-cylinder diesel. It is written for owners and mechanics doing their own repairs rather than routine operating tasks.
Coverage is split into General information, Specifications, Engine, Transaxle, Front Axle, Hydraulic System, Electrical, and Mower sections. You get servicing specifications, tightening torque tables, fluid capacities, maintenance intervals, hydrostatic transmission and travelling system service, the hydraulic circuit and lift cylinder, the wiring diagram with starting and charging systems, and mower deck power transmission and lifting mechanism.
Use it to diagnose hard starting, weak hydrostatic drive, cutting or lift problems, and charging faults, then disassemble, measure, and reassemble each system to Kubota specifications with the correct torque values and clearances.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-46 | Identification, General Precautions, Lubricants, Fuel And Coolant, Tightening Torques, Maintenance Check List, Check And Maintenance, Special Tools, G. General |
| Intro | 47-52 | Specifications, Dimensions, G. General, Engine, Servicing |
| Sect 1 Engine | 53-106 | Servicing Specifications [D1005-E2-2D] (Engine Body, Lubricating System, Cooling System, Fuel System), Fuel System, Checking |
| Sect 2 Transaxle | 107-144 | Travelling System, Hydrostatic Transmission, Separating Transaxle, Transmission Case |
| Sect 3 Front Axle | 145-156 | Structure, Checking, Disassembling and Servicing (Checking and Adjusting, Disassembling and Assembling), Servicing Specifications, Tightening Torques |
| Sect 4 Hydraulic System | 157-176 | Hydraulic Circuit, Hydraulic Pump, Hydraulic Control Valve and Valve Adaptor, Lift Cylinder, Mower Linkage, Checking |
| Sect 5 Electrical | 177-210 | Wiring Diagram, Starting System (Starter, Glow Plug, Safety Switch, Fuel Pump, Engine Stop Solenoid), Charging System (AC Dynamo, Regulator, Easy Checker) |
| Sect 6 Mower | 211-234 | Power Transmission, Lifting Mechanism, Checking. Disassembling and Assembling (Checking and Adjusting), Servicing Specifications, Tightening Torques |
Every system also includes troubleshooting.
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel Capacity | 30 L (7.9 U.S.gals., 6.6 Imp.gals.) | p. 9 |
| Cooling system Capacity | 4.0 L (4.2 U.S.qts., 3.5 Imp.qts.) | p. 9 |
| Fuel tank capacity | 30 L | p. 9 |
| Engine crankcase oil capacity | 3.4 L | p. 9 |
| Front tire pressure | 207 kPa | p. 15 |
| Rear tire pressure | 140 kPa | p. 15 |
| M8 bolts (No-grade or 4T) tightening torque | 17.7 to 20.5 N·m | p. 11 |
| Cylinder Head Surface Flatness (Allowable Limit) | 0.05 mm | p. 59 |
| Valve Clearance (Cold) Factory Spec | 0.145 to 0.185 mm | p. 59 |
| Engine Oil Pressure (At Rated Speed) Factory Spec | 196 to 441 kPa | p. 63 |
| Fan Belt Tension (Deflection) | Approx. 10 mm | p. 63 |
| Cylinder head screw tightening torque | 63.7 to 68.6 N·m | p. 65 |
