Industrial Tractor · 1971Unverified
John Deere 644A
John Deere 644A — Wheel Loader · 141 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
141 hp
Weight
12007 kg
Hover a source tag to verify
Overview
ManufacturerJohn DeereReference
Wheel LoaderReference
Four-wheel driveReference
Final drivesinboard planetaryReference
Articulated power steeringReference
Hydraulic wet disc brakesReference
Cab standard with heat.Reference
Engine
John Deere 6.6L 6-cyl dieselReference
Fuel tank189.2 LReference
Engine (gross)105.1 kWReference
Engine (net)97.7 kWReference
John DeereReference
turbocharged dieselReference
6-cylinderReference
liquid-cooledReference
Displacement6.6 LReference
Bore/Stroke108 x 121 mmReference
Power (net)97.7 kWReference
Power (gross)105.1 kWReference
Compression16.5:1Reference
Rated RPM2400Reference
Torque467.8 NmReference
Torque RPM1600Reference
StarterelectricReference
Starter volts12Reference
Oil capacity16.1 LReference
Coolant capacity34.1 LReference
Transmission
4-speed power shiftReference
Typepower shiftReference
Gears4 forward and 2 reverseReference
Power shift transmission with torque converter. Automatic shift from 1-2 and 3-4.Reference
PTO & Hydraulics
Typeopen centerReference
Pressure155.1 barReference
Pump flow227.1 lpmReference
Steering flow102.2 lpmReference
Steering press.137.9 barReference
Dimensions
Wheelbase264 cmReference
Weight12007 kgReference
Front tire20.5-25Reference
Rear tire20.5-25Reference
Industrial front20.5-25Reference
Industrial rear20.5-25Reference
Industrial front17.5-25Reference
Industrial rear17.5-25Reference
Length629 cmReference
Operating weight12007 kgReference
Ground clearance40 cmReference
Front tread203 cmReference
Rear tread203 cmReference
John Deere 644A attachments
front-end loaderReference
Electrical
Charging systemalternatorReference
Batteries2Reference
Battery volts12Reference
John Deere 644A Height
ROPS309 cmReference
Cab322 cmReference
Exhaust297 cmReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.