Big Bud HN350
The Big Bud HN350 is a tractor produced by Big Bud. It is equipped with a 855 ci 14.0 L engine. The listed engine power is Diesel (listed): 350 hp / 261.0 kW. Transmission: Fuller. Operating weight: 40000 lbs 18144 kg.
Engine Power
Diesel (listed): 350 hp / 261.0 kW
Fuel & Capacities
525 gal
1987.1 L
Transmission
Fuller
Operating Weight
40000 lbs
18144 kg
Overview
 | 1973 - 1978
HN SeriesFour-wheel Drive (4WD) tractor
HN Series
Four-wheel Drive (4WD) tractor |
|---|
Production | |
|---|---|
Manufacturer | Big Bud |
Four-wheel Drive (4WD) tractor | |
Built in Havre, Montana, USA | |
Big Bud HN350 Engine | |
|---|---|
Cummins 14.0L 6-cyl diesel | |
Fuel tank | 525 gal
1987.1 L |
Engine details ...  | |
Big Bud HN350 Transmission | |
|---|---|
13-speed gear | |
Transmission details ...  |
Big Bud HN350 Power | |
|---|---|
Engine | 350 hp
261.0 kW |
Mechanical | |
|---|---|
Four-wheel drive | |
Steering | hydrostatic power |
Cab standard. | |
Hydraulics | |
|---|---|
Type | open center |
Pump flow | 20 gpm
75.7 lpm |
Total flow | 40 gpm
151.4 lpm |
Steering flow | 20 gpm
75.7 lpm |
Dimensions & Tires | |
|---|---|
Weight | 40000 lbs
18144 kg |
Front tire | 24.5x32 |
Rear tire | 24.5x32 |
Full dimensions and tires ...  | |
References | |
|---|---|
 | |
Big Bud published in 1976 | |
350-450 published by Big Bud |
Engine
Engine Detail — 855 ci / 14.0 L Diesel
Manufacturer | Cummins NT855 |
Configuration | turbocharged intercooled diesel, 6-cylinder, liquid-cooled |
Displacement | 855 ci
14.0 L |
Bore/Stroke | 5.50x6.00 inches
140 x 152 mm |
Power | 350 hp
261.0 kW |
Rated RPM | 2100 |
Starter type | electric |
Transmission
Transmission — Fuller
Transmission | Fuller |
Type | gear |
Gears | 13 forward and 2 reverse |
With 30.5x32 tires. | |
 | |
Dimensions
Big Bud HN350 Tires | |
|---|---|
Ag front | 24.5x32 |
Ag rear | 24.5x32 |
Dimensions | |
|---|---|
Shipping weight | 40000 lbs
18144 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for Big Bud HN350 based on its 350 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 8+ Bottom On-Land Hitch8+ 铧重型机外牵引犁 | Commercial / Field Scale | High horsepower articulated/4WD field plowing. |
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 | 24 to 36 ft Heavy Duty Field Disc7.3 - 11.0 m 超宽重型整地耙 | Commercial / Field Scale | Broad-acre grain tillage for high-drawbar tractors. |
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 Big Bud HN350.
Estimated Continuous Field Runtime: 28.8 hrs
Approximately 28.8 hours of continuous field operation at ~75% rated power on a full tank (525 gal / 1987.3 L).
Estimated 75% Load Fuel Burn~18.2 gal/hr (68.9 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
Big Bud HN350 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Big Bud HN350.
Converted Equivalents:
Horsepower (HP)350 hp
Kilowatts (kW)261 kW
Metric Horsepower (PS / CV)354.9 PS
Direct Competitor Comparison
Compare Big Bud HN350 against same-era industry alternatives in the same horsepower class.
Current Model
Big Bud
Big Bud HN350
Engine Power:Diesel (listed): 350 hp / 261.0 kW
★ Baseline Reference
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