White Field Boss 21

The White Field Boss 21 is a tractor produced by White. It is equipped with a 71.4 ci 1.2 L engine. The listed engine power is Diesel (listed): 21 hp / 15.7 kW. Transmission: 12 forward and 4 reverse. Drive type: 4x2 2WD. Operating weight: 1584 to 1672 pounds.

Engine Power

Diesel (listed): 21 hp / 15.7 kW

Drive & Traction

4x2 2WD

Fuel & Capacities

6.1 gal 23.1 L

Transmission

12 forward and 4 reverse

Operating Weight

1584 to 1672 pounds

Overview

	1986 - 1988 Compact Utility tractorIseki built Compact Utility tractor Iseki built

Production
Distributor	White
Manufacturer	Iseki
Compact Utility tractor
Original price	$8,500 (1988)

White Field Boss 21 Engine
Isuzu 1.2L 3-cyl diesel
Fuel tank	6.1 gal 23.1 L
Engine details ...

White Field Boss 21 Transmission
12-speed
Transmission details ...

White Field Boss 21 Power
Engine	21 hp 15.7 kW
PTO (claimed)	19 hp 14.2 kW

Mechanical
Drive	4x2 2WD
	4x4 MFWD 4WD optional
Steering	manual
Mechanical expanding shoe brakes
Two-post ROPS. Optional canopy and radio.

Hydraulics
Type	open center
Pressure	2064 psi 142.3 bar
Total flow	5.5 gpm 20.8 lpm

Tractor hitch
Rear Type	I

Power Take-off (PTO)
Rear PTO	transmission
Rear PTO Type	540
Front PTO	crankshaft-driven
Front PTO Type	2600

Dimensions & Tires
Wheelbase	59 inches 149 cm
Weight	1584 to 1672 pounds
Front tire	4.00-12
Rear tire	12.4-16 (2WD)
Full dimensions and tires ...

Electrical
Charging system	alternator
Charging amps	35
Battery volts	12

References

1100 Series Front End Loaders published in 1987, by White
Field Boss 21 published in 1986, by White

Engine

Engine Detail — 71.4 ci / 1.2 L Diesel

Manufacturer	Isuzu
Fuel Type	Diesel
Configuration	3-cylinder, liquid-cooled
Displacement	71.4 ci 1.2 L
Bore/Stroke	2.99x3.39 inches 76 x 86 mm
Power	21 hp 15.7 kW
Air cleaner	single stage
Pre-heating	glow plugs
Compression	22.5:1
Rated RPM	2600
Idle RPM	850-2860
Starter volts	12

Transmission

Transmission — 12 forward and 4 reverse

Gears	12 forward and 4 reverse
With 12.4-16 rear tires.

Dimensions

White Field Boss 21 Tires
Standard tires (ag)	Front: 4.00-12. Rear: 12.4-16 (2WD)
	Front: 6.00-12. Rear: 12.4-16 (4WD)
Lawn/turf front	12.4-16 (2WD)
	24-8.50-12 (4WD)
Lawn/turf rear	13.6-16

Dimensions
Wheelbase	59 inches 149 cm
Length	105.5 inches 267 cm
Width	42.9 inches 108 cm
Height (exhaust)	75.2 inches 191 cm
Shipping weight	1,584 lbs (2WD) 718 kg
	1,672 lbs (2WD) 758 kg

Attachments

Attachment overview
60" mid-mount mower deck
White 1025QA loader
White 1155 QA loader
In addition to the 60-inch mid-mount mower, the Field Boss 21 could be equipped with rear finish mowers (48, 60, or 46-inch), rear flail mowers (50-inch), and rotary cutters (42, 48, or 60 inch). Front and rear 60-inch blades were available, plus a 4.5 foot box scraper. Three-point mounted tillers were fitted in 32 or 40 inch widths.

60" Mower deck
Type	mid-mount White
Cutting width	60 inches 152 cm

Photos

White Field Boss 21 tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for White Field Boss 21 based on its 21 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	1 to 2 Bottom (12")1 - 2 铧 (30 cm)	Light Duty	Ideal for garden plots and light sandy soil.
Rotary Cutter / MowerMowing & Clearing	4 ft (48 in)1.2 m	Light Duty	Pasture clipping and light brush under 1" diameter.
Rotary TillerSeedbed Prep	42 to 48 in105 - 120 cm	Light Duty	Covers compact tractor tire width.
Disc HarrowSecondary Tillage	5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片)	Light Duty	Small acreage soil break-up and secondary aeration.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for White Field Boss 21.

Estimated Continuous Field Runtime: 5.6 hrs

Approximately 5.6 hours of continuous field operation at ~75% rated power on a full tank (6.1 gal / 23.1 L).

Estimated 75% Load Fuel Burn~1.1 gal/hr (4.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours