Shibaura ST321

Last Updated: June 2024

Overview

The Shibaura ST321 is a compact utility tractor that offers versatility and reliability for various agricultural and maintenance tasks. Powered by a 21 horsepower Shibaura S773 diesel engine, it provides sufficient power within a three-cylinder, liquid-cooled setup. The ST321 features a mixed chassis equipped with a 4x4 MFWD 4WD system for enhanced traction and performance on challenging terrains. Steering is made efficient with its power steering system. This model caters to different user preferences as it comes with both gear and hydrostatic transmission options, boasting 9 forward and 3 reverse gears. The operator's station is secured with ROPS for safety, while the electric starter system ensures easy engine operation. It’s designed to handle a variety of tasks with its open center hydraulic system and Category I hitch. With a wheelbase of 55.3 inches and varying widths depending on the transmission type (44.8 inches for gear and 46.8 inches for hydrostatic), the tractor maintains a stable stance. Its operating weight ranges between 1649 and 1662 pounds, which, combined with its tire options, provides capability across different ground conditions. Front and rear treads are adjustable to cater to various worksite requirements.
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Key Specifications

Category: Utility

Power Output: 21

Transmission: Gear and Hydrostatic

Drive Type: 4WD

Operating Weight: 1649 to 1662

Fuel Type: Diesel

Shibaura ST321 vs. Similar Tractors

Power Output
Below Average
Greater than 11% of similar tractors.
Operating Weight
Above Average
Greater than 82% of similar tractors.

Technical Specifications

Engine

Manufacturer
Shibaura
Model
S773
Cooling Type
Liquid-cooled
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Naturally aspirated
Cylinders
3
Displacement (ci)
61.3
Bore (in)
3.03
Stroke (in)
2.83
Rated RPM
2600
Power Output (hp)
21

Transmission

Type
Gear and Hydrostatic
Forward Gears
9
Reverse Gears
3
Total Gears
-

Dimensions

Length (in)
107.4
Width (in)
Unknown (44.8 for Gear Width and 46.8 for Hydro Width provided)
Height (in)
Unknown (90 for Gear Height and 88.2 for Hydro Heights provided)
Operating Weight (lb)
1649 to 1662

Power Take-Off (PTO)

PTO Type
-
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x4 MFWD 4WD
Drive Type
4WD
Steering Type
Power
Coolant Capacity (qts)
3.7
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
16
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag and Lawn/Turf
Manufacture - End Year
-
Hitch Type
Category I
Hitch Category
-
Hitch Position
-
Hitch Capacity (lb)
-
Operator Station Type
ROPS
Starter Type
Electric
Brake Type
-
Hydraulic System Type
Open Center