Tractor · 1957Unverified
Ford Powermaster 851
Ford Powermaster 851 — 801 Powermaster Series · 63 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
63 hp
Max power
31.0 kW
Weight
2984 to 3500 pounds
Hover a source tag to verify
Overview
ManufacturerFordReference
Utility tractorReference
Built in Highland Park, Michigan, USAReference
Original price was $3,206 in 1957Reference
Two-wheel driveReference
SteeringmanualReference
Steeringpower assist optionalReference
Differential mechanical expanding shoe brakesReference
Open operator station.Reference
Variants
951row-crop chassisReference
811Select-O-Speed, no PTOReference
821Four-speed, no PTO or 3-pointReference
841Four-speedReference
851Five-speedReference
861Five speed, live PTOReference
871Select-O-SpeedReference
881Select-O-Speed, dual-speed PTOReference
Engine
Ford 2.8L 4-cyl gasolineReference
Ford 2.8L 4-cyl LP gasReference
Ford 2.8L 4-cyl dieselReference
Engine (gross)46.7 kWReference
Engine42.0 kWReference
Drawbar (claimed)32.8 kWReference
Belt (claimed)37.3 kWReference
Plows3Reference
Drawbar (tested)31.0 kWReference
Belt (tested)36.1 kWReference
Ford EAFReference
gasolineReference
4-cylinder 8-valveReference
liquid-cooled vertical overhead valveReference
Displacement2.8 LReference
Bore/Stroke99 x 91 mmReference
Power (gross)46.7 kWReference
Air cleaneroil bathReference
Compression7.5:1Reference
Rated RPM2000Reference
Torque225.1 NmReference
Torque RPM1600Reference
Firing order1-2-4-3Reference
Starter volts6Reference
Coolant capacity14.2 LReference
Sparkplug gap0.686 mmReference
Point gap0.635 mmReference
Intake valve clearance0.381 mmReference
Exhaust valve clearance0.381 mmReference
Oil capacity4.7 LReference
Oil change100 hReference
LP gasReference
liquid-cooledReference
Compression8.65:1Reference
Rated RPM2200Reference
FordReference
dieselReference
Power42.0 kWReference
Compression16.8:1Reference
Torque190.4 NmReference
Torque RPM1400Reference
Starter volts12Reference
Belt power (max)36.1 kWReference
Max power31.0 kWReference
Belt power (max)31.3 kWReference
Max power21.9 kWReference
Transmission
5-speed unsynchronized gearReference
ManufacturerFordReference
Typeunsynchronized gearReference
Gears5 forward and 1 reverseReference
Clutchdry discReference
Oil capacity7.6 LReference
Oil typeSAE 80Reference
Capacities
Fuel64.3 LReference
PTO & Hydraulics
Hydraulic system7.6 LReference
Typeopen centerReference
Capacity7.6 LReference
Pressure137.9 barReference
Total flow15.1 lpmReference
Rear TypeIReference
Rear lift567 kgReference
Rear PTOtransmissionReference
Rear PTO Type540Reference
Dimensions
Wheelbase189 cmReference
Weight2984 to 3500 poundsReference
Front tire6.00x16Reference
Rear tire12x28Reference
Ag front6.00x16Reference
Ag rear12x28Reference
Length306 cmReference
Width162 cmReference
Height145 cmReference
Shipping weight1353 kgReference
Operating weight1587 kgReference
Clearance (front axle)54 cmReference
Front tread132 to 203 cmReference
Rear tread132 to 193 cmReference
851 Serial Number Location
Left side of tractor, on top of transmission case behind the starter.Reference
851 Serial Numbers
19571001Reference
195811977Reference
195958312Reference
1960105943Reference
1961131427Reference
1962155531Reference
FAQ: How to read a serial number table.Reference
Electrical
Groundpositive (6V)Reference
Groundnegative (12V)Reference
Charging systemgeneratorReference
Charging amps20Reference
Battery volts6 (gas/lp)Reference
Battery volts12 (diesel)Reference
Battery AH80 (6V)Reference
Battery AH135 (12V)Reference
Test results
NTTL 640: gasoline 5-speed 2WDReference
NTTL 654: diesel 5-speed 2WDReference
Gasoline 5-speed 2WDMarch 12 - 31, 1958Link: Nebraska Tractor Test 640 fileReference
Belt fuel use (max)17.4 l/hourReference
Drawbar performanceReference
Gear 3 used for power test.Reference
Max pull2282 kgReference
Gear 1 used for pull test.Reference
Diesel 5-speed 2WDJune 2 - 11, 1958Link: Nebraska Tractor Test 654 fileReference
Belt fuel use (max)11.4 l/hourReference
Max pull2322 kgReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.