Part of the Kubota Repair Manuals.
This is the factory Kubota Service Manual for the GF1800 and GF1800E front-mount riding mowers, powered by the three-cylinder D722-FM diesel engine. Its 264 pages pair a Features and Mechanism overview with step-by-step servicing for every system on the machine.
Coverage runs through the engine, hydrostatic transmission and front axle, brakes, rear axle, steering, the hydraulic lift, the wet multi-disc PTO clutch, and the electrical system with its charging, lighting, and key-switch shut-off circuits. A dedicated mower section adds deck specifications, blade torque values, and maintenance checks.
Use this PDF to fix a PTO that will not stay engaged, chase a no-start, restore hydrostatic drive, or set blade torque correctly. It downloads instantly and prints cleanly, so you can take just the pages you need out to the mower.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Intro | Safety Servicing and Repairing, Safety Decals, Specifications | |
| Features | Unique 4WD Developed, Instrument Panel and Controls, A Lighter, More Compact Body Configuration | |
| General | Identification, Lubricants, Fuel and Cooling Water, Tightening Torques, Maintenance Check List, Check and Maintenance (Check Points of Daily or Each Use) | |
| Sect 1 Engine | Troubleshooting, Servicing Specifications, Tightening Torques, Checking, Disassembling and Servicing (Disassembling and Assembling, Engine Body, Checking and Adjusting) | |
| Sect 2 Transmission and Front Axle | Separating Transmission and Front Axle, Hydrostatic Transmission, Transmission Case and Front Axle Case | |
| Sect 3 Brakes | Brake Rod 1, Brake Rod 2, Automatic Release System, Parking Brake, Brake Switch, Brake Assembly, Brake Lining, Brake Drum | |
| Sect 4 Rear Axle | Rear Wheel and Kingpin, Rear Axle | |
| Sect 5 Steering | Steering Wheel, Steering Shaft, Joint Shaft, Pitman Arm, Steering Gear Case, Pinion Shaft, Sector Gear, Sector Shaft | |
| Sect 6 Hydraulic System | Control Valve, Control Valve Adaptor, Lift Cylinder | |
| Sect 7 PTO | PTO Rod, PTO Switch, Pressure Plate, Clutch Disc, Steel Plate, PTO Gear Case, 35T Gear, Brake Ring | |
| Sect 8 Electrical | Troubleshooting, Battery, Starting System, Engine Key Switch Shut-Off System, Charging System, Lighting System, Gauges, Easy Checker | |
| Sect 9 Mower | Specifications, Exterior View and Appellation (Side Discharge Type), Mower Identification, Lubricants, Tightening Torques, Maintenance Check List | |
| Supplement | Safety Instructions (Servicing and Repairing, Operation), Safety Decals, Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Center blade mounting screw torque | 98.1 to 117.7 N·m | p. 197 |
| Outer blade mounting screw torque | 123.6 to 147.1 N·m | p. 197 |
| Pressure Plate Thickness (Allowable Limit) | 1.80 mm | p. 162 |
| Clutch Disc Thickness (Allowable Limit) | 1.60 mm | p. 162 |
| Engine Oil Capacity | 3.0 L | p. 6 |
| Radiator Coolant Capacity | 3.3 L | p. 6 |
| Fuel Tank Capacity | 20 L | p. 6 |
| Engine Rated Speed | 3200 rpm | p. 6 |
| Engine Compression Pressure (Factory Spec) | 2.84 to 3.24 MPa | p. 68 |
| Engine Valve Clearance (Cold) (Factory Spec) | 0.145 to 0.185 mm | p. 68 |
| Engine Oil Pressure (At Idle Speed) (Factory Spec) | 98 kPa | p. 72 |
| Radiator Cap Tightness (Pressure Fall Time) (Factory Spec) | More than 10 seconds for pressure fall from 88 to 59 kPa | p. 73 |
