Part of the Kubota Repair Manuals.
This is the Kubota Service Manual for the TG1860 and TG1860G garden tractors, a 332-page PDF built for full workshop repair. The TG1860 runs the D722-E-GX diesel and the TG1860G uses the WG590V gasoline engine, and the manual identifies each machine and calls out where their procedures differ.It is organized into nine numbered sections: Engine, Transaxle, Brakes, Front Axle, Steering, Fender and Lift, PTO, Electrical, and Mower, ahead of a General section covering identification, lubricants, fuel, coolant, and tightening torques.With this manual you can overhaul the diesel or gasoline engine, service the hydrostatic transaxle, adjust the brakes and steering, repair the electric PTO clutch, and read the full wiring diagrams. Cutting-height setup and blade service for the mower deck are covered in the final section, making it a complete reference for keeping the tractor running.
What's Inside This Kubota TG1860, TG1860G Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 13-64 | Features, Identification (Tg1860, Tg1860G), Handling Precautions for Electrical Parts and Wiring (Battery, Fuse, Connector), Lubricants, Fuel and Coolant (Tg1860 |
| Sect 1 Engine | 65-172 | Cooling System, Pressurized Lubrication System, Troubleshooting |
| Sect 2 Transaxle | 173-190 | Checking Hydrostatic Transaxle, Adjusting Neutral, Pedal Stopper, Separating Hydrostatic Transaxle, Disassembling Hydrostatic Transaxle, Assembling Hydrostatic Transaxle |
| Sect 3 Brakes | 191-196 | Brake Pedal Play, Brake Operation, Parking Lock Pedal, Brake Lock, Brake Spring and Brake Rod, Brake Assembly |
| Sect 4 Front Axle | 197-200 | Toe-In, Separating Front Axle Assembly, Rod End, Front Wheel and Tie Rod, Knuckle Arm and King Pin |
| Sect 5 Steering | 201-240 | Troubleshooting Based on Each Symptom, Troubleshooting Based on Error Code, Error Code 02, Error Code 03, Error Code 05, Error Code 06, Error Code 11, Error Code 12 and 13 |
| Sect 6 Fender and Lift | 241-246 | Inspecting Gas Spring, Cutting Height Adjusting Dial, Separating Fender, Suspension and Fuel Tank, Lift Linkage, Lift Lever |
| Sect 7 PTO | 247-256 | Electric PTO Clutch, PTO Belt, Bevel Gear Case, PTO Tension Pulley |
| Sect 8 Electrical | 257-320 | Wiring Diagram (:TG1860, :TG1860G, Wiring Diagram: TG1860G), Ignition System, Kra System, Servicing |
| Sect 9 Mower | 321-332 | Checking Mower Blade, Checking Mower Belt, Adjusting Cutting Height, Tension Spring Rod, Pulley Cover and Mower Belt, Center Blade Pulley, Blades and Holder |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| TG1860 | ||
| General Use Screws, Bolt and Nuts (M6, No-grade or 4T) | 7.85 to 9.31 N·m (0.80 to 0.95 kgf·m, 5.79 to 6.87 ft·lbs) | p. 23 |
| General Use Screws, Bolt and Nuts (M8, No-grade or 4T) | 17.7 to 20.5 N·m (1.8 to 2.1 kgf·m, 13.1 to 15.1 ft·lbs) | p. 23 |
| Engine Crankcase Capacity | 3.0 L (3.2 U.S.qts., 2.6 Imp.qts.) | p. 21 |
| Maximum gross power | 13.4 kW (18 HP) | p. 8 |
| All Models | ||
| Fuel Tank Capacity | 15 L (4.0 U.S. gals., 3.3 Imp. gals.) | p. 21 |
| Engine oil change interval | Every 100 hrs | p. 25 |
| Engine oil filter cartridge replacement interval | Every 200 hrs | p. 25 |
| Hydrostatic transmission capacity | 3.5 L | p. 21 |
| Mower cutting height | 25 to 102 mm (1.0 to 4.0 in.) | p. 9 |
| General use screws M8 (No-grade or 4T) torque | 17.7 to 20.5 N·m | p. 23 |
| TG1860G | ||
| Maximum gross power | 13.4 kW (18 HP) | p. 10 |
| Engine crankcase capacity | 1.7 L | p. 22 |
Kubota TG1860, TG1860G Common Problems This Manual Covers
Hydrostatic transaxle loses drive
Weak or fading drive is the classic hydrostatic complaint on these tractors, from worn internals or wrong oil level. The transaxle section covers checking the unit, adjusting neutral, and full disassembly and assembly.
Manual Section: Sect 2 Transaxle p. 173Diesel engine hard to start
Hard starting or low power on the TG1860 diesel often traces to fuel injection or compression. The engine section includes troubleshooting, servicing specifications, and the injection pump and nozzle procedures.
Manual Section: Sect 1 Engine p. 65PTO clutch will not engage
The electric PTO clutch can fail to engage the blades or drag when it should release. The PTO section covers the electric clutch, PTO belt, bevel gear case, and tension pulley.
Manual Section: Sect 7 PTO p. 247Hard or loose steering
Excess play or heavy steering effort makes the tractor wander and tire unevenly. The steering section provides the failure diagnosis and the cautionary steps to follow before disassembly.
Manual Section: Sect 5 Steering p. 201Brake drag or weak braking
Incorrect pedal play, a worn brake, or a maladjusted parking lock lead to dragging or poor stopping. The brakes section covers pedal play, brake operation, the parking lock pedal, and the brake assembly.
Manual Section: Sect 3 Brakes p. 191Uneven cut or worn blades
An uneven cut usually comes from worn blades, a stretched belt, or a misadjusted cutting height. The mower section covers blade and belt inspection, cutting-height adjustment, and blade and holder service.
Manual Section: Sect 9 Mower p. 321Charging or wiring faults
Dead batteries, blown fuses, and no-start conditions send you to the electrical system. The electrical section carries the wiring diagrams for both the TG1860 and TG1860G, plus the ignition and KRA systems.
Manual Section: Sect 8 Electrical p. 257Frequently Asked Questions
Which models and engines does this manual cover?
It covers the Kubota TG1860 with the D722-E-GX diesel engine and the TG1860G with the WG590V gasoline engine, identifying each and noting where their service steps differ.
Does it cover the hydrostatic transaxle?
Yes. The Transaxle section covers checking, neutral adjustment, and full disassembly and assembly of the hydrostatic transaxle, which holds 3.5 liters of oil. p. 173
Are the wiring diagrams included?
Yes. The Electrical section contains the full wiring diagrams for both the TG1860 and TG1860G, along with the ignition and KRA systems and servicing steps. p. 257
How is the manual delivered?
It is an instant digital download after purchase, with no shipping and nothing physical sent to you.
How is this Kubota TG1860 Service Manual delivered?
This is a 332-page searchable PDF (15 MB) ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Are there any print restrictions on this Kubota TG1860 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Does this Kubota TG1860 Service Manual cover the hydraulic system?
Included. Hydraulic system schematics cover all circuits, control valves, and component specifications for the Kubota TG1860, TG1860G.
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