Part of the Kubota Repair Manuals.
This is the factory Kubota workshop manual for the GZD15 zero-turn mower, covering the GZD15-LD and GZD15-HD models with the Z602-GZD15 diesel engine. It runs 271 pages and is divided into mechanism and servicing for each section, so you understand how a system works before you take it apart.
Six sections cover the whole machine: general service data, engine, transaxle, front axle, hydraulic system, electrical system, and the mower deck. You get troubleshooting, servicing specifications, tightening torques, and step by step checking, disassembly, and assembly procedures for the hydrostatic transmission, pump and motor, lift cylinders, wiring, charging and starting systems, blades, and gear box. Whether you are curing a no-start, leveling the deck, servicing the hydrostatic drive, or rebuilding a spindle, this PDF gives you the factory reference for the GZD15.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | Identification, Handling Precautions for Electrical Parts and Wiring (Battery, Fuse, Connector, Handling of Circuit Tester), Lubricants, Fuel and Coolant, Maintenance | |
| Engine | Engine Body (Half-Floating Head Cover, Gear Case, Oil Pan), Lubricating System, Cooling System, Fuel System (Fuel Line) | |
| Transaxle | Travelling System (Hydrostatic Transmission, Structure, Pump and Motor, Check and High Pressure Relief Valve, Oil Flow, Power Trains Operation, Motion Control Linkage, Final Reduction Gear Section, PTO System, Brake) | |
| Front Axle | Structure, Disassembling and Servicing (Checking and Adjusting, Disassembling and Assembling, Separating Floor Cover and Front Axle, Disassembling Front Wheel and Wheel Bracket) | |
| Hydraulic System | Hydraulic Circuit, Hydraulic Pump, Hydraulic Control Valve, Lift Cylinder (Mower Lift Cylinder, Grass Collector Lift Cylinder and Grass Collector Dump Cylinder), Mower Linkage | |
| Electrical System | Wiring Diagram, Starting System (Starter, Glow Plug, Safety Switch, Fuel Pump, Engine Stop Solenoid), Charging System (AC Dynamo, Regulator, Easy Checker) | |
| Mower | Power Transmission, Lifting Mechanism, Disassembling and Assembling (Checking and Adjusting), Checking |
Every system also includes servicing specifications, tightening torques, and troubleshooting.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Mower blade screw tightening torque | 98 to 118 N·m (10.0 to 12.0 kgf·m, 72.3 to 86.8 ft-lbs) | p. 262 |
| Gear box screw tightening torque | 23.5 to 27.4 N·m (2.4 to 2.8 kgf·m, 17.4 to 20.2 ft-lbs) | p. 262 |
| Gear box mounting screw (Standard type / Reamer type) tightening torque | 48.1 to 55.9 N·m (4.9 to 5.7 kgf·m, 35.4 to 41.2 ft-lbs) | p. 262 |
| Air cleaner element cleaning interval | every 50 hours | p. 26 |
| Air cleaner element replacement interval | every 1 year | p. 26 |
| Glow plug tightening torque | 7.85 to 14.7 N·m (0.8 to 1.5 kgf·m, 5.8 to 10.8 ft-lbs) | p. 88 |
| Glow plug resistance | Approx. 0.9 Ω | p. 240 |
| Fuel filter element check interval | every 100 hours | p. 26 |
| Fuel filter element replacement interval | every 400 hours | p. 26 |
| Front Tip of Blade to Rear Tip of Blade Difference | 0 to 6.0 mm (0 to 0.24 in.) | p. 261 |
| Left Tip of Blade to Right Tip of Blade Difference | Less than 3 mm (0.1181 in.) | p. 261 |
| Fan belt adjustment interval | every 100 hours | p. 26 |
