Kubota gr2120 Specification, Oil Capacity, Prices & Overview

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About Kubota GR2120

The GR2120 from Kubota is a lawn and Garden tractor with a four-wheel drive. The Kubota Company has Been making this Tractor since 2010. The Kubota GR2120 has a 0.8 L diesel engine with three cylinders and a hydrostatic transmission with an Infinite number of forward and backward gears..

Kubota GR2120 garden tractors have D782 engines. Three-cylinder diesel engine 67 mm (2.64 in) bore and 73 mm piston stroke. (2.9 in).

It has a Displacement of 0.8 L (778 cm2) And a displacement of 47.5 cuin. This Engine had a Gross output Power of 21.2 PS (15.6 kW; 21.0 HP). the Kubota GR2120 has a fuel tank That Holds 18.0 liters (4.8 US gal; 4 Imp. gal), an Open operator Station, And hydrostatic power Steering.

Kubota GR2120 Price

Kubota GR2120 Original Price: $9,388 USD

Kubota gr2120 Oil Capacity

Kubota GR2120 oil capacity is 18.0 liters

Kubota GR2120 Specs


Engine Model Kubota D782
Engine Type Vertical, water-cooled, 4-cycle diesel
Number of Cylinders 3
Displacement, cu in (L) 47.5 (0.778)
Engine Bore, in (mm) 2.64 (67.0)
Engine Stroke, in (mm) 2.90 (73.6)
Aspiration Natural
Rated Engine Power, hp (kW) 18.1 (13.5)
Maximum Engine Power, hp (kW) 18.9 (14.2)
Rated Engine Speed, rpm 3000
High Idle Speed, rpm 3450
Low Idle Speed, rpm 900-1000
Torque Speed, rpm 1350
Compression Ratio 24:1
Firing Order 1-2-3
Fuel Injection to the combustion chamber Spherical type
Fuel Injection Pump Bosch MD-type mini pump
Governor Type All-speed mechanical governor
Injection Nozzle Bosch Throttle type
Lubricating System Forced lubrication by trochoid pump
Oil Pressure Indicating Electrical type switch
Lubricating Filter Full-flow paper filter (Cartridge type)
Cooling System Pressurized radiator, forced circulation with water pump
Fuel Tank Capacity, gal (L) 4.8 (18.0)
Oil Capacity, qts (L) 3.0 (2.8)
Coolant Capacity, qts (L) 2.2 (2.1)

Electrical System

Electrical System Rating, Volts 12
Charging Alternator 12V, 150W
Starting System Electric Starting with Starter
Starting Motor 12V, 1.0 kW
Battery 51R (12V, 475CCA)

Power Take Off

PTO Operational Type Shaft drive
PTO Horsepower, hp (kW) 13.5 (10.2)
PTO Clutch Hydraulic wet multi discs
PTO Brake Wet multi discs


Transmission Type Hydrostatic
Gears Infinite forward and reverse
Cruise Control Standard
Travel Speed Control Foot pedal
Transmission Oil Capacity, qts (L) 3.5 (3.3)
Maximum Forward Speed, mph (kph) 6.2 (10.0)
Maximum Reverse Speed, mph (kph) 3.1 (5.0)
Service Brake Internal expanding brake

Wheels And Tires

Drive Wheels 4WD 4×4
Steering Configuration Front Steer
Steering System Full hydraulic power steering (Glide steer)
Front Tire Size (Turf, Bar) 16×7.5-8
Rear Tire Size (Turf, Bar) 23×10.5-12
Front Tire Maximum Pressure, kPa (psi) 180 (26)
Rear Tire Maximum Pressure, kPa (psi) 150 (22)
Front Tread, in (mm) 32.2 (825)
Rear Tread, in (mm) 32.3 (820)

Dimension And Weight

Wheelbase, in (mm) 50.4 (1280)
Overall Length, in (mm) 78.3 (1990)
Width (with 48-inch mower deck), in (mm) 61 (1550)
Width (with 54-inch mower deck), in (mm) 67 (1700)
Overall Height, in (mm) 50.8 (1290)
Weight (without mower deck), lbs (kg) 790 (360)
Weight (with 48-inch mower deck), lbs (kg) 960 (435)
Weight (with 54-inch mower deck), lbs (kg) 970 (440)

48 Mower Deck

Mower Deck Model RCK48GR
Cutting Width, in (mm) 48 (1219)
Cutting Height, in (mm) 1.0-4.0 (25-102)
Adjustment of Cutting Height Dial gauge
Mounting Method Quick joint, parallel linkage
Total Length, in (mm) 35.4 (900)
Total Width, in (mm) 61 (1550)
Total Height, in (mm) 11.4 (290)
Discharge Direction Right
Gearbox Oil Capacity, qts (L) 0.16 (0.15)
Weight, lbs (kg) 165 (75)

54 Mower Deck

Mower Deck Model RCK54GR
Cutting Width, in (mm) 54 (1372)
Cutting Height, in (mm) 1.0-4.0 (25-102)
Adjustment of Cutting Height Dial gauge
Mounting Method Quick joint, parallel linkage
Total Length, in (mm) 35.6 (905)
Total Width, in (mm) 67 (1700)
Total Height, in (mm) 11.4 (290)
Discharge Direction Right
Gearbox Oil Capacity, qts (L) 0.16 (0.15)
Weight, lbs (kg) 177 (80)

Kubota GR2120 Review 

The Kubota GR2120 is a diesel-powered lawn tractor renowned for its durability, power, and user-friendliness. It’s a top pick for homeowners with expansive lawns or those requiring a tractor capable of handling challenging mowing conditions.

For a full review, please check this YouTube video.

Kubota GR2120 Attachments

Attachment overview
48″ mid-mount mower deck
54″ mid-mount mower deck

Kubota GR2120 Problems

Diesel Engine Troubleshooting

The engine won’t start or starts hard

  • The fuel filter is dirty; you should put in a new filter element.
  • Open the fuel Supply valve to inject fuel if The fuel supply valve is closed.
  • If there is water, dirt, or air in the fuel system, you need to drain, flush, fill, and bleed it.
  • If the fuel injectors are clogged or broken, clean or replace them.
  • Fuel injection pump damage – Change or fix the injection pump.
  • Poor engine compression – Check the cylinder block and replace any broken parts.

Engine stops during operation

  • The engine hasn’t reached the right temperature yet. Warm it up as needed.
  • There’s air in the fuel system—Let the air out of the system.
  • Irregular fuel injection: Change the timing of the fuel injection
  • Clean or replace the filter if the fuel filter element is dirty.
  • Fuel injectors that are clogged or broken: Check the fuel injectors and replace them if necessary.

The engine starts and stops

  • The fuel injection pump is out of sync with the engine.
  • Fuel filter obstruction – Replace the filter element
  • Dirty fuel injector nozzles should be replaced.
  • The fuel injection pump isn’t working right; fix or replace it.
  • The air cleaner element is clogged. Change or replace the air cleaner element.

Hydrostatic Transmission Troubleshooting

HST transmission noises

  • Linkage for controlling speed is worn or not set up right. Change or set up the linkage.
  • Overloading the transmission: The load should be lowered
  • Transmission fluid is dirty or there isn’t enough of it. Fill it up to the right level or change it.
  • Transmission parts are broken or worn. Replace or fix the broken parts.

Difficult to shift

  • Shift linkage stuck or worn out – linkage needs to be replaced
  • The hydrostatic pump is broken or stuck – Fix or replace the pump
  • Parts of the transmission shift control that aren’t set up right or are broken: replace or set up as needed.

Power is too low

  • Not enough transmission fluid? Check and add more transmission fluid.
  • The drive pulley is broken or worn, so you should put in a new one.
  • The shift linkage is broken or misaligned – Change or adjust the linkage
  • The linkage for the speed control pedal is bent or not set up right. Fix or set up the linkage.

Mower Deck Troubleshooting

Mower vibrates excessively

  • The drive sheave on the mower deck is dirty or worn out.
  • Mower blades that aren’t straight or bent should be changed or straightened.
  • Blade bolts are not tight enough. The bolts need to be tightened.
  • Drive belt lose? Tighten or replace the belt.

Constant clogging of the discharge chute

  • High speed of cutting – Operate at a slower speed
  • Tall grass? Lower the cutting height on your mower.
  • Less engine speed—The throttle isn’t fully open
  • Low-cutting mower deck: Use a higher cutting height
  • Drive belt installation error – Replace the drive belt properly.

Lawn mower leaving uncut grass

  • The cutting deck is clogged—Check the cutting deck and clean it.
  • The blades are too dull. Sharpen the blades.
  • If the blades are worn or broken, change them.
  • High speed on the ground—need to slow down
  • The cutting height is too low. Raise the cutting height on the mower.
  • When the grass bag is full, empty it.

Electrical Tr0oubleshooting

The battery will not charge

  • Loose or corroded wire connections – Fix or tighten connections
  • Bad terminal clamps on the battery? Get new terminal clamps.
  • The batteries need to be replaced because they are broken.

Starter cranks slow

  • Low voltage means the battery is empty and needs to be charged.
  • The battery is going down quickly. Have it fixed or get a new one.
  • Terminals that don’t work or battery cables that aren’t connected. Check the wiring connections and clean or replace the terminals.

The starter will not work

  • If the battery is dead or old; charge or replace it.
  • The wire harness isn’t connected or isn’t connected right. Check the wire harness and connect it correctly.
  • The battery has low capacity and must be recharged.
  • A spark plug that is broken or not set up right – Clean, adjust, or replace a spark plug.
  • Replacing a broken starting motor or solenoid is necessary.


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Kubota GR2120 FAQ

How much does a new Kubota GR2120 cost?

Kubota GR2120 Original Price: $9,388 USD

Is Kubota GR2120 a 4WD?

For superior performance in areas requiring both 4WD traction and effective mowing, consider the GR20 Series with Glide Steer technology.

How much does a Kubota GR2120 weigh?

Kubota GR2120 weight is 970 lbs (with deck) 439 kg


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