| Manufacturer | Shibaura |
| Price | - |
| Model | ST321 |
| Equipment Type | Compact Utility Tractors |
| Factory | Matsumoto, Japan |
SHIBAURA ST321 POWER
| Engine | 21hp / 15.7kW |
| PTO (claimed) | 17hp / 12.7kW |
ENGINE DETAIL
The Shibaura ST321 features a robust 3-cylinder diesel engine with a 21hp output, ideal for small to medium agricultural tasks. Its compact 1.0L displacement and high compression ratio of 23:1 enhance fuel efficiency, although it may lead to increased wear if not properly maintained. With electric starting and moderate oil and coolant capacities, the ST321 offers ease of operation, but regular checks are critical to avoid overheating or lubrication issues in demanding conditions.
| Description | Shiabaura S773 diesel 3-cylinder liquid-cooled |
| Displacement | 61.3ci / 1.0L |
| Bore/Stroke | 3.03x2.83inches / 77x 72mm |
| Power | 21hp / 15.7kW |
| Compression | 23:1 |
| Rated RPM | 2600 |
| Starter | electric |
| Starter volts | 12 |
| Oil capacity | 3.5qts / 3.3L |
| Coolant capacity | 3.7qts / 3.5L |
SHIBAURA ST321 ENGINE
The Shibaura ST321 features a compact 1.0L 3-cylinder diesel engine, offering excellent fuel efficiency and torque for small-scale agricultural tasks. Its lightweight design enhances maneuverability in tight spaces, making it ideal for gardens and small farms. However, the limited horsepower may pose challenges for heavy-duty operations or larger implements.
| Description | Shiabaura 1.0L 3-cyl diesel |
TRANSMISSIONS OVERVIEW
The Shibaura ST321 features a versatile 9-speed gear/hydrostatic transmission, providing seamless operation across various terrains. This allows for improved maneuverability and precision in tasks such as plowing or hauling, though the complexity may require a steeper learning curve for operators unfamiliar with hydrostatic systems. Overall, its design is advantageous for both agricultural applications and light industrial use, balancing power with ease of control.
| Description | 9-speed gear/hydrostatic |
TRANSMISSION 1
The Shibaura ST321 features a 9-forward and 3-reverse gear configuration, providing versatile speed and torque options for various agricultural tasks. The dry disc clutch system offers reliable engagement and durability but may require more frequent maintenance compared to wet clutches, especially in heavy-duty applications. Overall, this tractor is well-suited for tasks that require frequent directional changes, such as tilling or harvesting in small to medium-sized fields.
| Type | gear |
| Gears | 9 forward and 3 reverse |
| Clutch | dry disc |
SPEEDS 1
| Description | With 9.5-16 rear tires |
TRANSMISSION 2
The Shibaura ST321's hydrostatic transmission provides seamless speed control and operator comfort, making it ideal for tasks requiring precise maneuvering. Its infinite forward and reverse gears enhance versatility in confined spaces, although this may result in increased wear under heavy loads. Optimal for small to medium agricultural operations or landscaping, it is best suited for varied terrain where frequent direction changes are necessary.
| Type | hydrostatic |
| Gears | infinite (2-range) forward and reverse |
SPEEDS 2
| Description | With 29x12.00-15 R3 rear tires |
MECHANICAL
The Shibaura ST321 features a 4x4 MFWD drivetrain, ideal for enhanced traction on varied terrains, complemented by a mechanical rear differential lock for improved mobility in challenging conditions. Its power steering and wet disc brakes ensure superior handling and braking control, promoting operator safety and comfort during extended use. However, the 9-speed gear/hydrostatic transmission may require familiarity for optimal performance, balancing ease of use with the potential complexity of gear selection in dynamic agricultural tasks.
| Chassis | 4x4 MFWD 4WD |
| Differential lock | mechanical rear |
| Steering | power |
| Brakes | wet disc |
| Cab | Two-post folding ROPS |
| Transmissions | 9-speed gear/hydrostatic |
CAPACITY
| Fuel | 5.3gal / 20.1L |
| Hydraulic system | 4.2gal / 15.9L |
HYDRAULICS
| Type | open center |
| Capacity | 4.2gal / 15.9L |
| Pressure | 1849psi / 127.5bar |
| Pump flow | 4.9gpm / 18.5lpm |
TRACTOR HITCH
| Rear Type | I |
| Rear lift | 1474lbs / 668kg |
POWER TAKE-OFF (PTO)
| Gear Rear PTO | transmission |
| Hydro Rear PTO | live |
| Rear RPM | 540 (1.375) |
| Gear/ 561@2600 hydro} Engine RPM | 588@2600 |
| Mid PTO | optional |
| Mid RPM | 2000 |
| Gear/ 2040@2600 hydro} Engine RPM | 2139@2600 |
SHIBAURA ST321 TIRES
The Shibaura ST321 tractor has versatile tire options, allowing it to be tailored for agricultural or lawn/turf applications, providing flexibility for various tasks. The agricultural front tires (6-12) and rear tires (9.5-16) deliver excellent traction and stability in fieldwork, while the turf tires (20x8.00-10 front and 29x12.00-15 rear) minimize ground disturbance, making it ideal for landscaping. Ensure the appropriate tire choice is made based on the intended use to optimize performance and reduce soil compaction or damage.
| Ag front | 6-12 |
| Ag rear | 9.5-16 |
| Lawn/turf front | 20x8.00-10 |
| Lawn/turf rear | 29x12.00-15 |
DIMENSIONS
| Wheelbase | 55.3inches / 140cm |
| Length | 107.4inches / 272cm |
| Gear Width | 44.8inches / 113cm |
| Hydro Width | 46.8inches / 118cm |
| Gear Height (ROPS) | 90inches / 228cm |
| Hydro Height (ROPS) | 88.2inches / 224cm |
| Gear Weight | 1662lbs / 753kg |
| Hydro Weight | 1649lbs / 747kg |
| Gear Clearance (front axle) | 10.6inches / 26cm |
| Hydro Clearance (front axle) | 8.8inches / 22cm |
| Front tread | 33.3inches / 84cm |
| Rear tread | 35.3 to 37.7inches / 89 to 95cm |
DIMENSIONS & TIRES
The Shibaura ST321 has a compact wheelbase of 55.3 inches, enhancing maneuverability in tight spaces, making it ideal for small farms or landscaping tasks. Its weight of 1649 to 1662 pounds provides stability on slopes while allowing for various attachments, although it may limit transport options compared to lighter models. The front tire size of 6-12 and rear size of 9.5-16 deliver adequate grip for varied terrain, but users should monitor tire wear for optimal performance in muddy or uneven conditions.
| Wheelbase | 55.3inches / 140cm |
| Weight | 1649 to 1662 pounds |
| Front tire | 6-12 |
| Rear tire | 9.5-16 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 40 |
| Charging volts | 14 |
| Battery volts | 12 |