Big Bud 525/50
The Big Bud 525/50 is a tractor produced by Big Bud. It is equipped with a 1150 ci 18.8 L engine. The listed engine power is Diesel (listed): 525 hp / 391.5 kW. Transmission: Twin Disc TD-92-2609. Operating weight: 45000 to 52000 pounds.
Engine Power
Diesel (listed): 525 hp / 391.5 kW
Fuel & Capacities
550 gal
2081.8 L
Transmission
Twin Disc TD-92-2609
Operating Weight
45000 to 52000 pounds
Overview
 | 1979 - 1982
3 SeriesFour-wheel Drive (4WD) tractor
3 Series
Four-wheel Drive (4WD) tractor |
|---|
Production | |
|---|---|
Manufacturer | Big Bud |
Four-wheel Drive (4WD) tractor | |
Built in Havre, Montana, USA | |
Variants | |
|---|---|
525/20 | gear shift |
525/50 | power shift |
Big Bud 525/50 Engine | |
|---|---|
Cummins 18.8L 6-cyl diesel | |
Engine details ...  |
Big Bud 525/50 Power | |
|---|---|
Engine | 525 hp
391.5 kW |
Drawbar (tested) | 406.48 hp
303.1 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Four-wheel drive | |
Final drives | planetary |
Articulated power steering | |
Pneumatic drum brakes | |
Cruiser Cab standard with air-conditioning. | |
Capacity | |
|---|---|
Fuel | 550 gal
2081.8 L |
Hydraulic system | 36 gal
136.3 L |
Hydraulics | |
|---|---|
Type | closed center |
Capacity | 36 gal
136.3 L |
Steering flow | 36 gpm
136.3 lpm |
Dimensions & Tires | |
|---|---|
Wheelbase | 150 inches
381 cm |
Weight | 45000 to 52000 pounds |
Front tire | 30.5-32 |
Rear tire | 30.5-32 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 75 |
Battery volts | 12 |
References | |
|---|---|
 | |
No Excuses published in 1980, by Big Bud | |
Size Us Up published in 1979, by Big Bud |
Engine
Engine Detail — 1150 ci / 18.8 L Diesel
Manufacturer | Cummins KTA-1150-C |
Configuration | turbocharged aftercooled diesel, 6-cylinder, liquid-cooled inline |
Displacement | 1150 ci
18.8 L |
Bore/Stroke | 6.25x6.25 inches
159 x 159 mm |
Power | 525 hp
391.5 kW |
Air cleaner | dual dry element |
Rated RPM | 2100 |
Starter | electric |
Starter volts | 24 |
Transmission
Transmission options | |
|---|---|
9-speed power shift | |
6-speed power shift |
Transmission — Twin Disc TD-92-2610
Transmission | Twin Disc TD-92-2610 |
Type | power shift |
Gears | 9 forward and 2 reverse |
 | |
Transmission — Twin Disc TD-92-2609
Transmission | Twin Disc TD-92-2609 |
Type | power shift |
Gears | 6 forward and 1 reverse |
Dimensions
Big Bud 525/50 Tires | |
|---|---|
Ag front | 30.5-32 |
Ag rear | 30.5-32 |
Dimensions | |
|---|---|
Wheelbase | 150 inches
381 cm |
Length | 267.6 inches
679 cm |
Width | 120 inches
304 cm |
Height (cab) | 144.5 inches
367 cm |
Height (exhaust) | 156 inches
396 cm |
Ground clearance | 14.5 inches
36 cm |
Big Bud 525/50 Weight | |
|---|---|
Shipping | 45000 lbs
20412 kg |
Operating | 52000 lbs
23587 kg |
Max capacity | 60000 lbs
27216 kg |
Tests
Nebraska Tractor Test 1400 | |
|---|---|
Diesel 9-speed 4WD
June 29 - July 9, 1981
Link: Nebraska Tractor Test 1400 file | |
Drawbar performance | |
Max power | 406.48 hp
303.1 kW |
Fuel use | 27.3 gal/hour
103.3 l/hour |
Max pull | 42216 lbs
19149 kg |
Photos
Big Bud 525/50
Big Bud 525/50
Big Bud 525/50
Big Bud 525/50
Recommended Implements & Sizing Guide
Engineering recommendations for Big Bud 525/50 based on its 525 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 525/50.
Estimated Continuous Field Runtime: 20.1 hrs
Approximately 20.1 hours of continuous field operation at ~75% rated power on a full tank (550 gal / 2082 L).
Estimated 75% Load Fuel Burn~27.3 gal/hr (103.3 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
Big Bud 525/50 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Big Bud 525/50.
Converted Equivalents:
Horsepower (HP)525 hp
Kilowatts (kW)391.5 kW
Metric Horsepower (PS / CV)532.3 PS
Direct Competitor Comparison
Compare Big Bud 525/50 against same-era industry alternatives in the same horsepower class.
Current Model
Big Bud
Big Bud 525/50
Engine Power:Diesel (listed): 525 hp / 391.5 kW
★ Baseline Reference
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