Acremaster 421
The Acremaster 421 is a tractor produced by Acremaster. It is equipped with a 669.1 ci 11.0 L engine. The listed engine power is Diesel (listed): 210 hp / 156.6 kW. Transmission: Acremaster. Operating weight: 20723 lbs 9399 kg.
Engine Power
Diesel (listed): 210 hp / 156.6 kW
Fuel & Capacities
268.4 gal
1015.9 L
Transmission
Acremaster
Operating Weight
20723 lbs
9399 kg
Overview
 | 1982 - 1984
400 SeriesFour-wheel Drive (4WD) tractor
400 Series
Four-wheel Drive (4WD) tractor |
|---|
Production | |
|---|---|
Manufacturer | Acremaster |
Four-wheel Drive (4WD) tractor | |
Built in Merredin, Australia | |
Acremaster 421 Engine | |
|---|---|
Mercedes-Benz 11.0L 6-cyl diesel | |
Fuel tank | 268.4 gal
1015.9 L |
Engine details ...  | |
Acremaster 421 Transmission | |
|---|---|
9-speed gear | |
Transmission details ...  |
Acremaster 421 Power | |
|---|---|
Engine | 210 hp
156.6 kW |
Mechanical | |
|---|---|
Four-wheel drive | |
Articulated power steering | |
Cab standard with air-conditioning. |
Dimensions & Tires | |
|---|---|
Weight | 20723 lbs
9399 kg |
Front tire | 18.4x34 |
Rear tire | 18.4x34 |
Full dimensions and tires ...  | |
Engine
Engine Detail — 669.1 ci / 11.0 L Diesel
Manufacturer | Mercedes-Benz OM421 |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled V6 |
Displacement | 669.1 ci
11.0 L |
Bore/Stroke | 5.04x5.59 inches
128 x 142 mm |
Power | 210 hp
156.6 kW |
Rated RPM | 2350 |
Starter type | electric |
Transmission
Transmission — Acremaster
Transmission | Acremaster |
Type | gear |
Gears | 9 forward and 3 reverse |
 | |
Dimensions
Acremaster 421 Tires | |
|---|---|
Ag front | 18.4x34 |
Ag rear | 18.4x34 |
Dimensions | |
|---|---|
Weight | 20723 lbs
9399 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for Acremaster 421 based on its 210 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 5 to 7 Bottom (18")5 - 7 铧 (45 cm) | Commercial / Field Scale | Large acreage tillage; requires front ballast weights. |
Rotary Cutter / MowerMowing & Clearing | 15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼 | Commercial / Field Scale | Large commercial field and roadside mowing operations. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙 | Commercial / Field Scale | Wide commercial field leveling; requires hydraulic remotes. |
Hay BalerHay & Forage | Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m) | Commercial / Field Scale | High-capacity commercial forage harvesting (1000 RPM PTO). |
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 Acremaster 421.
Estimated Continuous Field Runtime: 24.6 hrs
Approximately 24.6 hours of continuous field operation at ~75% rated power on a full tank (268.4 gal / 1016 L).
Estimated 75% Load Fuel Burn~10.9 gal/hr (41.3 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
Acremaster 421 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Acremaster 421.
Converted Equivalents:
Horsepower (HP)210 hp
Kilowatts (kW)156.6 kW
Metric Horsepower (PS / CV)212.9 PS
Direct Competitor Comparison
Compare Acremaster 421 against same-era industry alternatives in the same horsepower class.
Current Model
Acremaster
Acremaster 421
Engine Power:Diesel (listed): 210 hp / 156.6 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 3788
Engine Power:189.5
Production Years:1980 - 1981
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