Shibaura ST321
The Shibaura ST321 is a tractor produced by Shibaura. It is equipped with a 61.3 ci 1.0 L engine. The rated power output is 21 hp 15.7 kW. Transmission: infinite forward and reverse (2-range). Operating weight: 1649 to 1662 pounds.
Engine Power
21 hp
15.7 kW
Fuel & Capacities
5.3 gal
20.1 L
Transmission
infinite forward and reverse (2-range)
Operating Weight
1649 to 1662 pounds
Shibaura ST321 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | ST SeriesCompact Utility tractor |
|---|---|
ST Series | |
Compact Utility tractor | |
Production | |
|---|---|
Manufacturer | Shibaura |
Compact Utility tractor | |
Built in Matsumoto, Japan | |
Shibaura ST321 Engine | |
|---|---|
Shiabaura 1.0L 3-cyl diesel | |
Engine details ...  |
Shibaura ST321 Power | |
|---|---|
Engine | 21 hp
15.7 kW |
PTO (claimed) | 17 hp
12.7 kW |
Mechanical | |
|---|---|
Four-wheel drive | |
Differential lock | mechanical rear |
Power steering | |
Wet disc brakes | |
Two-post folding ROPS. | |
Capacity | |
|---|---|
Fuel | 5.3 gal
20.1 L |
Hydraulic system | 4.2 gal
15.9 L |
Hydraulics | |
|---|---|
Type | open center |
Capacity | 4.2 gal
15.9 L |
Pressure | 1849 psi
127.5 bar |
Pump flow | 4.9 gpm
18.5 lpm |
Tractor hitch | |
|---|---|
Rear Type | I |
Rear lift | 1474 lbs
668 kg |
Power Take-off (PTO) | |
|---|---|
Gear Rear PTO | transmission |
Hydro Rear PTO | live |
Rear PTO Type | 540 (1.375) |
Gear Engine RPM | 588@2600 |
Hydro Engine RPM | 561@2600 |
Mid PTO | optional |
Mid PTO Type | 2000 |
Gear Engine RPM | 2139@2600 |
Hydro Engine RPM | 2040@2600 |
Dimensions & Tires | |
|---|---|
Wheelbase | 55.3 inches
140 cm |
Weight | 1649 to 1662 pounds |
Front tire | 6-12 |
Rear tire | 9.5-16 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 40 |
Charging volts | 14 |
Battery volts | 12 |
References | |
|---|---|
 | |
ST318 ST321 ST324 Workshop Manual |
Engine
Engine Detail — 61.3 ci / 1.0 L Diesel
Manufacturer | Shiabaura S773 |
Fuel Type | Diesel |
Configuration | 3-cylinder, liquid-cooled |
Displacement | 61.3 ci
1.0 L |
Bore/Stroke | 3.03x2.83 inches
77 x 72 mm |
Power | 21 hp
15.7 kW |
Compression | 23:1 |
Rated RPM | 2600 |
Starter | electric |
Starter volts | 12 |
Oil capacity | 3.5 qts
3.3 L |
Coolant capacity | 3.7 qts
3.5 L |
Transmission
Transmission options | |
|---|---|
9-speed gear | |
hydrostatic |
Transmission — 9 forward and 3 reverse gear
Type | gear |
Gears | 9 forward and 3 reverse |
Clutch | dry disc |
With 9.5-16 rear tires. | |
 | |
Transmission — infinite forward and reverse (2-range) hydrostatic
Type | hydrostatic |
Gears | infinite forward and reverse (2-range) |
With 29x12.00-15 R3 rear tires. | |
 | |
Dimensions
Shibaura ST321 Tires | |
|---|---|
Ag front | 6-12 |
Ag rear | 9.5-16 |
Lawn/turf front | 20x8.00-10 |
Lawn/turf rear | 29x12.00-15 |
Dimensions | |
|---|---|
Wheelbase | 55.3 inches
140 cm |
Length | 107.4 inches
272 cm |
Gear Width | 44.8 inches
113 cm |
Hydro Width | 46.8 inches
118 cm |
Gear Height (ROPS) | 90 inches
228 cm |
Hydro Height (ROPS) | 88.2 inches
224 cm |
Gear Weight | 1662 lbs
753 kg |
Hydro Weight | 1649 lbs
747 kg |
Gear Clearance (front axle) | 10.6 inches
26 cm |
Hydro Clearance (front axle) | 8.8 inches
22 cm |
Front tread | 33.3 inches
84 cm |
Rear tread | 35.3 to 37.7 inches
89 to 95 cm |
Photos
Shibaura ST321 tractor photo
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