John Deere
644 G-Tier Mid-Size Wheel Loader
Wheel Loaders
The 227 hp 644 G-Tier with 4 - 4.25 cubic yard bucket delivers the rugged reliability and ease of operation you expect from John Deere.
Current product detail page listed in the official John Deere AFME sitemap; this does not assert a 2026 model year or confirmed Eswatini stock.
The AFME sitemap includes model-year-specific and legacy listings. Confirm current model, configuration, and Eswatini availability with SwaziTrac before quoting.
Model / part number: 3002YN
Technical specification source: Official manufacturer technical data
Catalogue source: John Deere Africa & Middle East (AFME) · Checked 2026-10-04
Specifications
Key Specs6 specifications
- Net Peak Power
- 1800.0 rpm
- Net Peak Power At Rated RPM (ISO 9249) (Metric)
- 169.0 kW
- Net Peak Power At Rated RPM (ISO 9249) (Imperial)
- 227.0 hp
- Net Peak Torque
- 1.4 rpm
- Net Peak Torque At Rated RPM (ISO 9249) (Metric)
- 981.0 Nm
- Net Peak Torque At Rated RPM (ISO 9249) (Imperial)
- 724.0 lb-ft
Engine18 specifications
- Manufacturer
- John Deere
- Model
- PowerTech™ Plus 6068H
- Non Road Emission Standards
- EPA Tier 3/EU Stage IIIA
- Cylinders
- 6
- Valves Per Cylinder
- 4
- Displacement (Metric)
- 6.8 L
- Displacement (Imperial)
- 414.0 cu in.
- Net Peak Power
- 1800.0 rpm
- Net Peak Power At Rated RPM (ISO 9249) (Metric)
- 169.0 kW
- Net Peak Power At Rated RPM (ISO 9249) (Imperial)
- 227.0 hp
- Net Peak Torque
- 1.4 rpm
- Net Peak Torque At Rated RPM (ISO 9249) (Metric)
- 981.0 Nm
- Net Peak Torque At Rated RPM (ISO 9249) (Imperial)
- 724.0 lb-ft
- Net Torque Rise
- 42.0 %
- Fuel System (Electronically Controlled)
- High-pressure common rail
- Lubrication
- Full-flow spin-on filter and integral cooler
- Aspiration
- Turbocharged, charge air cooled
- Air Cleaner
- Under-hood, dual-element dry type, restriction indicator in cab monitor for service
Cooling1 specifications
- Fan Drive Type
- Hydraulically driven, proportionally controlled, fan aft of coolers
Electrical And Lighting4 specifications
- System Type
- 24 volt with 80-amp alternator
- Battery Voltage
- 12.0 V
- Number Of Batteries
- 2
- Battery Capacity Per Each
- 950.0 CCA
Transmission System5 specifications
- Type
- Countershaft-type PowerShift
- Torque Converter
- Single stage, single phase
- Shift Control
- Electronically modulated, adaptive, load and speed dependent
- Operator Interface
- Joystick-mounted F-N-R; Quick-Shift button on hydraulic lever
- Shift Modes
- Manual/auto (1st–D or 2nd–D); Quick-Shift button with 2 selectable modes: kick-down or kick-up/down; and 3 adjustable clutch cutoff settings
Axles And Brakes3 specifications
- Final Drives
- Heavy-duty inboard-mounted planetary
- Service Brakes (ISO 3450)
- Hydraulically actuated, spring retracted, self-adjusting, inboard sun-shaft mounted, oil cooled, single disc
- Parking Brake (ISO 3450)
- Automatic spring applied, hydraulically released, driveline mounted, oil cooled, multi disc
Wheels And Tires4 specifications
- Tread Width On Standard Tires (Metric)
- 2170.0 mm
- Tread Width On Standard Tires (Imperial)
- 85.4 in.
- Width Over Tires On Standard Tires (Metric)
- 2765.0 mm
- Width Over Tires On Standard Tires (Imperial)
- 108.9 in.
Serviceability10 specifications
- Fuel Tank (With Lockable Cap) Refill Capacity (Metric)
- 300.0 L
- Fuel Tank (With Lockable Cap) Refill Capacity (Imperial)
- 79.6 gal.
- Cooling System Refill Capacity (Metric)
- 30.0 L
- Cooling System Refill Capacity (Imperial)
- 31.7 qt
- Engine Oil With Vertical Spin On Filter Refill Capacity (Metric)
- 21.0 L
- Engine Oil With Vertical Spin On Filter Refill Capacity (Imperial)
- 22.2 qt
- Transmission Reservoir With Vertical Filter Refill Capacity
- 25.0 L
- Axle Oil Without Coolers (Front And Rear, Each) Refill Capacity
- 25.0 L
- Hydraulic Reservoir With Filter Refill Capacity (Metric)
- 100.0 L
- Hydraulic Reservoir With Filter Refill Capacity (Imperial)
- 26.4 gal.
Hydraulic System And Steering18 specifications
- Pump Type And System (Loader And Steering)
- Variable-displacement, axial-piston pump; closed-center, pressure-compensating system
- Rated RPM
- 2.25 rpm
- System Pressure At Max Rated Flow (Metric)
- 3000.0 kPa
- System Pressure At Max Rated Flow (Imperial)
- 435.0 psi
- Max Rated Flow At Rated RPM (Metric)
- 329.3 L/min
- Max Rated Flow At Rated RPM (Imperial)
- 87.0 gpm
- System Relief Pressure (Loader And Steering) (Metric)
- 23100.0 kPa
- System Relief Pressure (Loader And Steering) (Imperial)
- 3.35 psi
- Loader Controls
- 2-function valve; joystick control or fingertip controls (field kit); hydraulic-function enable/disable; optional 3rd-function valve with auxiliary lever
- Steering Type (ISO 5010)
- Power, fully hydraulic
- Steering Articulation Full Arc Angle
- 80.0 degrees
- Steering Articulation Angle Each Direction
- 40.0 degrees
- Turning Radius (Measured To Centerline Of Outside Tire) (Metric)
- 5.55 m
- Turning Radius (Measured To Centerline Of Outside Tire) (Imperial)
- 18.0 ft, in.
- Hydraulic Raise Cycle Time
- 5.2 seconds
- Hydraulic Dump Cycle Time
- 1.5 seconds
- Hydraulic Lower (Power Down) Cycle Time
- 3.2 seconds
- Hydraulic Total Cycle Time
- 9.9 seconds
Maximum Forward Travel Speeds8 specifications
- Range 1 (Metric)
- 7.1 km/h
- Range 1 (Imperial)
- 4.4 mph
- Range 2 (Metric)
- 11.0 km/h
- Range 2 (Imperial)
- 7.3 mph
- Range 3 (Metric)
- 23.2 km/h
- Range 3 (Imperial)
- 14.4 mph
- Range 4 (Metric)
- 38.7 km/h
- Range 4 (Imperial)
- 24.0 mph
Maximum Reverse Travel Speeds6 specifications
- Range 1 (Metric)
- 7.5 km/h
- Range 1 (Imperial)
- 4.7 mph
- Range 2 (Metric)
- 12.5 km/h
- Range 2 (Imperial)
- 7.7 mph
- Range 3 (Metric)
- 24.5 km/h
- Range 3 (Imperial)
- 15.2 mph