Part of the Kubota Operator Manuals.
This factory Kubota operator manual covers the GR2020G, GR2120, and GR2120AU lawn and garden tractors (publication K1270-7122-1). The GR2020G runs a gasoline engine while the GR2120 and GR2120AU use a Kubota D782 diesel. Across 100 pages it covers safe operation, specifications, mower mounting, engine and machine operation, cleaning, tires and wheels, maintenance, periodic service, and troubleshooting.Owners can use it to mount and level the mower deck, start and operate the machine, set service intervals, check tire pressures and wheel torque, clean the cooling screen, and work through the troubleshooting charts when the machine will not start or move. Model-specific capacities, torque values, and battery ratings are included.Delivered as an instant PDF download you can view on any device or print for the shop.
What's Inside This Kubota GR2020G, GR2120, GR2120AU Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safe Operation | - | Before Operating, Operating, Pulling Loads, Operation on Slopes, PTO, Lift Link, Servicing |
| Servicing of Lawn and Garden Tractor | - | Machine Serial No., Engine Serial No., Mower Serial No., Warranty, Scrapping |
| Specifications | - | Engine, Fuel, Capacity, Machine, Dimensions, Mower Deck, Grass Catcher, Mower |
| Implement Limitations | - | Front Axle Wf, Rear Axle Wr, Total Gross Vehicle Weight, Ballast |
| Instrument Panel and Controls | - | Easy Checker, Choke Lever, Throttle Lever, Head Light Switch, PTO Lever, Key Switch |
| Mower Mounting | - | Attaching the Mower, Mounting the Mower Deck, Parallel Linkage, Mower Deck, Mower Lift Stoppers, Dismounting the Mower Deck |
| Operating the Engine | - | Starting the Engine, Key Switch, Throttle Lever and Choke Lever, Cold Weather Starting, Block Heater, Stopping the Engine, Engine Stop, Warming Up |
| Operating the Machine | - | Operating New Machine, Changing Lubricating Oil for New Machines, Engine Break-In, Machine Break-In, Starting, Operator's Seat, Head Light Switch, Hydraulic Lift Lever |
| Operating the Mower | - | Making the Most of Your Mower, Cutting Height, Cutting Height Control Dial, Kra System Normal Operating Mode, PTO Lever, Kra System Override Mode |
| Cleaning | - | Cleaning with Water, Cleaning the Mowing System |
| Tire and Wheels | - | Tires, Inflation Pressure, Wheels |
| Maintenance | - | Service Intervals, Lubricants, Fuel and Coolant |
| Periodic Service | - | How to Open the Hood, Daily Check, Checking Engine Oil Level, Checking Amount of Fuel and Refueling, Checking and Cleaning Radiator and Screen to Prevent Overheating |
| Troubleshooting | - | Engine Troubleshooting, Battery Troubleshooting, Machine Troubleshooting, Mower Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Blade bolt torque | 103 to 118 N-m (76 to 87 lbf-ft, 10.5 to 12.0 kgf-m) | p. 92 |
| Headlight bulb replacement value | 24W | p. 91 |
| Front tire inflation pressure (Turf tire) | 160 kPa (1.6 kgf/cm², 24 psi) | p. 48 |
| Rear tire inflation pressure (Turf tire) | 150 kPa (1.5 kgf/cm², 22 psi) | p. 48 |
| Hydrostatic Transmission Oil Capacity | 3.3 L (3.5 U.S.qts.) | p. 19 |
| GR2120, GR2120AU | ||
| Fan drive belt tension (deflection) | approx. 10 mm (0.39 in.) when the center of the belt is depressed with finger pressure of 98 N (10 kgf) | p. 78 |
| Battery type and capacity | 51R (12V, 475CCA) | p. 19 |
| Engine Oil Capacity | 2.8 L (3.0 U.S.qts.) | p. 19 |
| Fuel Tank Capacity | 18 L (4.8 U.S.gals.) | p. 19 |
| GR2020G | ||
| Battery type and capacity | 10U1L (12V, 300CCA) | p. 19 |
| Engine Oil Capacity | 1.9 L (2.0 U.S.qts.) | p. 19 |
| Fuel Tank Capacity | 16 L (4.2 U.S.gals.) | p. 19 |
Kubota GR2020G, GR2120, GR2120AU Common Problems This Manual Covers
Engine stalls or rolls back on slopes
Stalling on a hill can create a dangerous rollback or loss of control. The safe operation section sets slope limits and covers mowing up and down rather than across a grade.
Manual Section: Safe Operation p. 8Machine will not start
A no-start usually traces to the safety interlock, a switch, or wiring. The troubleshooting section walks through the checks for starting and safety-system faults.
Manual Section: Troubleshooting p. 97Overheating from grass buildup on the screen
Grass packed on the panel screen and cooling fins restricts airflow and leads to overheating. The periodic service section covers checking and cleaning the radiator and screen.
Manual Section: Periodic Service p. 58Headlight cable melts near the muffler
A mis-routed headlight cable can contact the muffler and melt or short. The periodic service section covers the headlight and its 24W bulb replacement.
Manual Section: Periodic Service p. 58Uneven cut from an out-of-level deck
A deck that is not level side to side or front to back leaves an uneven cut. The mower mounting section covers parallel linkage and side-to-side deck adjustment.
Manual Section: Mower Mounting p. 24Low tire pressure hurts stability and cut
Underinflated tires reduce stability and can tilt the deck. The manual gives turf tire pressures of 160 kPa front and 150 kPa rear and the wheel torque values.
Manual Section: Tire and Wheels p. 48Frequently Asked Questions
Which models and engines does this manual cover?
It covers the Kubota GR2020G, GR2120, and GR2120AU lawn and garden tractors, publication K1270-7122-1. The GR2020G is gasoline powered and the GR2120 and GR2120AU use a Kubota D782 diesel.
What is the mower blade bolt torque?
The periodic service section gives a blade bolt torque of 103 to 118 N-m (76 to 87 lbf-ft) for these machines. p. 92
What tire pressures and wheel torque does it specify?
The tire and wheels section lists turf tire pressures of 160 kPa (24 psi) front and 150 kPa (22 psi) rear, with a front wheel bolt torque of 108.5 to 130.2 N-m. p. 48
What battery does each model use?
The specifications section lists a 10U1L (12V, 300CCA) battery for the GR2020G and a 51R (12V, 475CCA) battery for the GR2120 and GR2120AU. p. 19
Is this Kubota GR2020G Operator Manual a digital download?
This is a 100-page searchable PDF ready for immediate download. Works on any device: pull it up on your phone while you're under the hood. No shipping, no waiting.
Is this Kubota GR2020G Operator Manual printable?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Reviews
There are no reviews yet.