John Deere 644 P-Tier



Key Features

  • Net Power: 186 kW (249 hp) at 1,800 rpm
  • Operating Weight: 18 709–18 744 kg (41,246–41,324 lb.)
  • Bucket Capacity: 3.1–3.6 m3 (4.0–4.75 cu. yd.)
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DRIVELINE

Engine Manufacturer

John Deere

Engine Model

PowerTech PSS 6068

Emission Rating

Tier 4 / Stage V

Displacement, ltr (Inches³)

6.8 (415)

Rated Speed, rpm

1800

Engine Output - Net, kW (hp)

186 (249)

Torque, Nm (lbf / ft)

1100 (811)

Torque Rise, %

58

Transmission Type

Powershift

Front Differential Type

Locking

Rear Differential Type

Open

Tire size - Standard

23.5 R25

Service Brake - Type

Wet Disc

Service Brake - Location

All Wheels

Service Brake - Actuation

Hydraulic

Parking Brake - Type

Wet Multi Disc



DIMENSIONS

Height - Over Cab, mm (ft/in)

3450 (11 ft 4 in)

Wheelbase, mm (ft/in)

3310 (10 ft 10 in)

Length - Including Bucket, mm (ft/in)

8330 (27 ft 4 in)

Ground clearance, mm (inches)

386 (15.2)

Width Over tires - Std, mm (ft/in)

2875 (9 ft 5 in)

Height - Pivot Pin, mm (ft/in)

4090 (13 ft 5 in)

Reach - At 2130mm 45° Dump, mm (ft/in)

1610 (5 ft 3 in)

Turning Circle - Maximum, mm (ft/in)

13000 (42 ft 9 in)



CAPACITIES

Fuel Tank, ltr (gallons (US))

350 (92.6)

Hydraulic Tank, ltr (gallons (US))

105.2 (27.8)

Axle - Front, ltr (gallons (US))

22 (5.75)

Axle - Rear, ltr (gallons (US))

22 (5.75)

Transmission, ltr (gallons (US))

23 (6.075)

Heaped Capacity, m³ (yd³)

3.2 (4.25)

Smallest bucket capacity, m³ (yd³)

3.2 (4.25)

Largest bucket capacity, m³ (yd³)

3.4 (4.5)

Breakout - Bucket , kgf (lbf)

15574 (34334)

Ride Control System

Optional

System Voltage, V

24

Alternator Output, Amp

100

Pump Type

Piston

Pump Flow - 1, lt/min (gallons (US) / min)

310 (82)

System Pressure, bar (PSI)

251.66 (3650)




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