Thieman Harvester Theiman
The Thieman Harvester Theiman is a tractor produced by Thieman Harvester. It is equipped with a 201 ci 3.3 L engine. The listed engine power is Gasoline (listed): 40 hp / 29.8 kW. Transmission: 3 forward and 1 reverse.
Engine Power
Gasoline (listed): 40 hp / 29.8 kW
Fuel & Capacities
Gasoline
Transmission
3 forward and 1 reverse
Overview
 | 1936 - 1942 |
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Production | |
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Manufacturer | Thieman Harvester |
Built in Albert City, Iowa, USA | |
The Thieman was a kit tractor sold by the Thieman Harvester Company. The kit was available with the Ford model A engine, or the buyer could supply their own Ford, General Motors, or Dodge engine. Because of the kit nature, every Thieman is unique. | |
Thieman Harvester Theiman Engine | |
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Ford 3.3L 4-cyl gasoline | |
Engine details ...  |
Thieman Harvester Theiman Transmission | |
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3-speed gear | |
Transmission details ...  |
Thieman Harvester Theiman Power | |
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Engine | 40 hp
29.8 kW |
Mechanical | |
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Two-wheel drive | |
Steering | manual |
Open operator station. | |
Dimensions & Tires | |
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Full dimensions and tires ...  |
Links | |
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What a Buy!: information on the Thieman from Farm Collector |
Engine
Engine Detail — 201 ci / 3.3 L Gasoline
Manufacturer | Ford |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
The engine from the Ford model A was available with the Thieman although other engines could be used. | |
Displacement | 201 ci
3.3 L |
Bore/Stroke | 3.875x4.25 inches
98 x 108 mm |
Power | 40 hp
29.8 kW |
Compression | 5.9:1 |
Rated RPM | 2200 |
Transmission
Transmission — 3 forward and 1 reverse gear
Type | gear |
Gears | 3 forward and 1 reverse |
Dimensions
Thieman Harvester Theiman Tires |
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Dimensions |
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Photos
Thieman Harvester Theiman
Thieman Harvester Theiman
Recommended Implements & Sizing Guide
Engineering recommendations for Thieman Harvester Theiman based on its 40 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
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 Thieman Harvester Theiman.
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
Thieman Harvester Theiman Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Thieman Harvester Theiman.
Converted Equivalents:
Horsepower (HP)40 hp
Kilowatts (kW)29.8 kW
Metric Horsepower (PS / CV)40.6 PS
Direct Competitor Comparison
Compare Thieman Harvester Theiman against same-era industry alternatives in the same horsepower class.
Current Model
Thieman Harvester
Thieman Harvester Theiman
Engine Power:Gasoline (listed): 40 hp / 29.8 kW
★ Baseline Reference