Sx3100 open platform tractor with ROPS

31.2 Engine Horsepower* Diesel Tractor

Sx3100 open platform tractor with ROPS

Whether you’re moving dirt, mowing fields, plowing or blowing snow, you’ll be hard-pressed to find a more powerful, versatile, all-season tractor than the Sx3100. You can easily change a wide variety of attachments in just minutes, so you’ll spend less time getting aggravated, and more time getting things done. It’s just another example of features you can look for in other tractors, but never find.



Bore and Stroke in. (mm) 88 x 90 mm
Cooling system Liquid Cooled
Fuel Diesel
Gross Power 31.2 (HP)
Maker Yanmar
Net Power 30 (HP)
Number of cylinders 3
PTO Power at Working Speed 23.5 (HP)
Rated RPM 2500
Total displacement 100.2 (cu. in.)
Type 31.2 Engine Horsepower* Diesel Tractor


Engine Coolant 2.1 (qt.)
Engine Oil 3.6 (qt.)
Fuel tank 7.1 (gal)
Transmission Oil 4.6 (gal)


2WD/4WD engagement Selectable
Brakes Wet disc
Mid PTO/RPM 2,100/2,500
Number of ranges 2
Rear differential lock Foot-pedal engagement
Rear PTO/RPM 540/2,495
Transmission type Hydrostatic


3-point hitch Category 1
3-point lift capacity at 24” (61 cm) 1209 (lbs)
4-way loader control valve Standard
Hydraulic Control System Position controlled
Power steering Fully hydraulic
Pump capacity (implement) @ Rated 4.8 (gpm)
Pump capacity (steering) @ Rated RPM 5.3 (gpm)


Ground Clearance (with R4 Tires) 10.6 (in.)
Overall length (with 3PH and R4 Tires) 109 (in.) w/o 3PH
Weight (with ROPS, R4 Tires, Full Fluid) 2030 (lbs)
Wheelbase 65.2 (in.)
Width (with R4 Tires) 51.6 (in.)

Tire size

Industrial (R4) - Front 23" x 8.5" – 12" (58.4 cm x 21.6 cm – 30.5 cm)
Industrial (R4) - Rear 14" – 17.5" (35.6 cm – 44.4 cm)
Turf (R3) - Front 24" x 8.5" – 14" (61 cm x 21.6 cm – 35.6 cm)
Turf (R3) - Rear 36" x 14" – 15" (91.4 cm x 35.6 cm – 38.1 cm)

Traveling speeds

Forward (with R1 Tires) 14.8 mph (23.8 km/h)
Reverse (with R1 Tires) 5.1 mph (8.2 km/h)


Type Independent


Attachments 1-year limited warranty
Power train (Engine and transmission core components) 5-year or 2,500-hour limited warranty
Tractor (Private Individual Usage) 2-year or 2,000-hour limited warranty


There's an attachment, tool or implement for nearly every job you will want to perform with your tractor. Your next step is to decide how you want to use your tractor and what tasks you need to complete.

How to pick the right tractor for your land

There's a lot of work needed to make your rural lifestyle a reality. A new, helpful book called "Your Buyer's Guide" will assist you in successfully managing your property. Find the right tractor and attachments to perform these jobs:

  • Mow lawns and pastures
  • Plow and dig
  • Harvest fruit, hay and vegetables
Read the guide
the cover of the guide with text over a farm with a red barn, fresh green grass, and a woman in a cowboy hat looking at the sunrise.

Build the Yanmar tractor you need

Select the right Yanmar tractor to help you mow, plow, harvest, dig, build, and haul equipment and supplies.

build your tractor
A Yanmar tractor mowing a large swath of land in the sunset.