Lanz Bulldog HR4
The Lanz Bulldog HR4 is a tractor produced by Lanz. It is equipped with a 628.5 ci 10.3 L engine. The listed engine power is Engine Detail — 628.5 ci / 10.3 L (listed): 28 hp / 20.9 kW. Transmission: gear. Drive type: 2WD.
Engine Power
Engine Detail — 628.5 ci / 10.3 L (listed): 28 hp / 20.9 kW
Drive & Traction
2WD
Transmission
gear
Overview
 | 1928 - 1929 |
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Production | |
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Manufacturer | Lanz |
Built in Mannheim, Baden-Württemberg, Germany | |
Total built | 180 |
Lanz HR4 Engine | |
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Lanz 10.3L 1-cyl oil | |
Engine details ...  |
Lanz HR4 Transmission | |
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3-speed | |
Transmission details ...  |
Lanz HR4 Power | |
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Engine | 28 hp
20.9 kW |
Mechanical | |
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Drive | 2WD |
Dimensions & Tires | |
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Full dimensions and tires ...  |
Engine
Engine Detail — 628.5 ci / 10.3 L
Manufacturer | Lanz |
Configuration | 1-cylinder, liquid (thermosyphon)-cooled |
oil | |
Displacement | 628.5 ci
10.3 L |
Bore/Stroke | 8.858x10.24 inches
225 x 260 mm |
Power | 28 hp
20.9 kW |
Rated RPM | 500 |
Transmission
Transmission — gear
Transmission | gear |
Gears | 3 forward and reverse |
Dimensions
Lanz HR4 Tires |
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Dimensions |
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Recommended Implements & Sizing Guide
Engineering recommendations for Lanz Bulldog HR4 based on its 28 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 | 5 ft (60 in)1.5 m | Medium Duty | Pasture maintenance and weeds up to 1.5" diameter. |
Rotary TillerSeedbed Prep | 54 to 60 in135 - 150 cm | Medium Duty | Thorough seedbed preparation in orchards and vegetable plots. |
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 Lanz Bulldog HR4.
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
Lanz Bulldog HR4 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Lanz Bulldog HR4.
Converted Equivalents:
Horsepower (HP)28 hp
Kilowatts (kW)20.9 kW
Metric Horsepower (PS / CV)28.4 PS
Direct Competitor Comparison
Compare Lanz Bulldog HR4 against same-era industry alternatives in the same horsepower class.
Current Model
Lanz
Lanz Bulldog HR4
Engine Power:Engine Detail — 628.5 ci / 10.3 L (listed): 28 hp / 20.9 kW
★ Baseline Reference
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