Kubota built this factory Workshop Manual (OEM #9789710835) for the full G-series riding mower line: G1700, G1800, G1900, and G2000, with both the diesel D662/D722 and gasoline WG750-G engines. The 422 pages run more than 20 pages of wiring diagrams covering all four models, 10 pages of hydraulic schematics that map the control valve and lift cylinder routing, 100 pages of exploded views, and 12 pages of troubleshooting across engine, transmission, and mower deck faults. The hydrostatic transmission teardown, 2WS and 4WS steering service, front PTO belt tension, and full mower deck disassembly are all here. Glow plug resistance reads about 0.9 Ω; torque the terminal nut to 0.98 to 1.77 N·m on the G1700/G1800/G1900. Bookmarked and keyword-searchable, the PDF opens on whatever device follows you into the shop.
What's Inside This Kubota G1700–G2000 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Mechanism | 8-46 | Engine [D662-L-D662-D722], Lubricating System, Cooling System, Fuel System, Governor, Engine [WG750-G], Ignition System |
| Transmission And Rear Axle | 47-59 | Hydrostatic Transmission (Transmission Case), Transmission Case (Rear Axle), Rear Axle, Brake |
| Brake | 60-62 | Traveling Brake, Parking Brake, Front Axle |
| Front Axle | 63 | Front Axle Components, Front Axle Pivots, Wheels and Shocks, Steering (2WS Type) |
| Steering | 64-66 | 2WS Type (4WS Type), 4WS Type, Hydraulic System (New Type) |
| Hydraulic System | 67-76 | Hydraulic System (Control Valve and Control Valve Adaptor, Neutral, Lift, Overloaded, Down, Lift Cylinder, Current Type), Front PTO System |
| Front PTO System | 77 | Front PTO System Components, Power Transmission, PTO Clutch Lever Operation, Front PTO Belt Tension, Electrical System (Wiring Diagram And Electrical Circuit) |
| Electrical System | 78-100 | Wiring Diagram And Electrical Circuit (Starting System [G1700-G1800-G1900]), Starting System ([G2000]) |
| General | 101-119 | Identification, Lubricants, Fuel And Cooling Water, Tightening Torques, Maintenance Check List, Check And Maintenance, Special Tools |
| Servicing | 120-372 | Engine Servicing, Troubleshooting, Servicing Specifications, Tightening Torques, Checking, Disassembling And Servicing, Transmission And Rear Axle Servicing |
| Workshop Manual For Mower | 373-422 | Mechanism (Power Transmission), General (Lifting System, Mower Identification, Lubricants, Tightening Torques, Maintenance Check List, Check And Maintenance) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| M6 (No-grade or 4T) Tightening Torque | 7.85 to 9.32 N·m | p. 104 |
| Glow Plug Resistance | Approx. 0.9 Ω | p. 200 |
| Fuel Filter Type | Accordion-pleated paper type | p. 21 |
| Fuel Filter Material | Cotton fiber | p. 21 |
| Engine Oil Capacity | 3.0 L (3.2 U.S. qts., 2.64 Imp.qts.) | p. 103 |
| Fuel Tank Capacity | 19 L (5.0 U.S. gals., 4.2 Imp.gals.) | p. 5 |
| Transmission Case Capacity | 5.7 L (6.0 U.S. qts., 5.02 Imp.qts.) | p. 103 |
| G1700/G1800 | ||
| Battery Capacity | 12 V, 45 AH | p. 5 |
| G1900/G2000 | ||
| Battery Capacity | 12 V, 35 AH | p. 5 |
| G1700/G1800/G1900 | ||
| Glow Plug Terminal Nut Torque | 0.98 to 1.77 N·m | p. 129 |
| Fuse Rating | 10A, 20A, 15A | p. 79 |
| G2000 | ||
| Fuse Rating | 15A, 20A | p. 82 |
Kubota G1700–G2000 Series Common Problems This Manual Covers
Kubota G1800 engine won't start or cranks sluggishly in cold weather, no preheat indicator light p. 200
Start with battery voltage; it must read more than 12 V (page 202). Test each glow plug with an ohmmeter, where resistance should sit near 0.9 Ω (page 200). Check the preheat relay and wiring connectors for corrosion. On G1700/G1800/G1900 machines, torque replacement glow plug terminal nuts to 0.98 to 1.77 N·m.
Manual Section: Electrical System Servicing TroubleshootingEngine cranks at normal speed but won't fire, fuel tank full, no exhaust smoke
Inspect the fuel filter first: its accordion-pleated cotton fiber paper filters at 15 µm (page 21) and clogs with no visible warning. Drain the sediment bowl to clear any water, then replace the filter, bleed air from the fuel line, and confirm the fuel shutoff valve is fully open.
Manual Section: Engine Servicing TroubleshootingElectrical accessories intermittently stop working or fuse blows again right after replacement p. 79
Trace the battery feed wire from the terminal to the fuse block, watching for chafing or a corroded connector. Fuse ratings run 10A, 15A, and 20A on the G1700/G1800/G1900 (page 79); the G2000 carries 15A and 20A (page 82). Test each fuse with a multimeter, clean the terminals, and check harness routing for pinch points against the frame.
Manual Section: Electrical System Servicing TroubleshootingHydrostatic transmission sluggish or machine loses drive power under load on hills
Confirm the transmission case fluid level right away; capacity is 5.7 L (6.0 U.S. qts.) per page 103. Low or degraded fluid drives sluggish hydrostatic response long before internal wear sets in. Adjust the linkage at the hydrostatic control, and if the machine jerks from a stop, reset the neutral detent.
Manual Section: Transmission And Rear Axle Servicing TroubleshootingEngine runs hot, coolant temperature gauge climbs quickly during extended mowing sessions
Remove the engine side panels and clear debris from the cooling fins and radiator screen. Check the engine oil level too: capacity is 3.0 L (3.2 U.S. qts.) per page 103, and running low speeds up heat buildup. Inspect the cooling fan belt for wear, top off coolant, and clear the air passages around the engine bay.
Manual Section: Engine Servicing TroubleshootingFrequently Asked Questions
Why won't my Kubota G1800 start or preheat?
When a Kubota G1800 won't start, the usual culprits are a discharged battery, disconnected wiring, a blown fuse, or a failing starter. No preheat? Check the glow plug, the main switch, and the harness connections. Pages 121 and 197 walk through the full diagnosis.
What is the torque spec for Kubota G1700/G1800/G1900/G2000 engine head bolts?
Head bolt torque depends on the engine. On the diesel D662-L, D662, and D722, tighten the cylinder head screw to 39.2 to 44.1 N·m (4.0 to 4.5 kgf·m, 28.9 to 32.5 ft-lbs). On the gasoline WG750-G, the spec is 37.3 to 42.2 N·m (3.8 to 4.3 kgf·m, 27.5 to 31.1 ft-lbs). Pages 129 and 153 show which engine goes in which model.
What are the replacement specifications for battery?
Kubota G1700 and G1800 models run a 12 V, 45 AH battery; G1900 and G2000 models use 12 V, 35 AH. The factory voltage check calls for more than 12 V.
What are the replacement specifications for glow plugs / preheat components?
Across the G1700, G1800, G1900, and G2000, glow plug resistance should read about 0.9 Ω. Use that figure to check glow plug continuity during service.
What format is this Kubota G1700–G2000 Series manual in?
It is an instant PDF download. The complete 422-page searchable Workshop Manual lands in your hands right after payment, ready to open on a laptop, tablet, or phone in the shop.
Are there any print restrictions on this Kubota G1700–G2000 Series manual?
None at all. Print a single page, a full chapter, or the whole manual: the PDF ships fully unlocked.
Does this Kubota G1700–G2000 Series Workshop Manual have electrical diagrams?
Yes. This workshop manual includes wiring diagrams covering the mower electrical circuits.
Document Quality
This document is a scanned PDF, not a native digital file. An OCR layer is present, allowing you to search and copy text, though minor OCR errors may occur. The text quality is consistently crisp and easy to read on all pages. Diagrams and illustrations are raster images, meaning they may show some pixelation when highly magnified, but their labels are clear and readable. Pages are clean with no noticeable scan artifacts, stains, or skew, and there are some blank pages interspersed throughout the document.
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