John Deere 644 Wheel loaders tech specs
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The John Deere 644K (2015–2019) is a heavy-duty mid-size wheel loader built for serious productivity. It brings about 173 kW (232 hp) from a Tier 3 PowerTech engine, weighs in at 18.3–18.7 t, and handles 2.8–3.2 m³ buckets. With a breakout force of 15,378 kg, it's designed to load fast and carry big—without sacrificing reliability.
Engine: PowerTech 6068H, Tier 3 – 173 kW (232 hp)
Operating Weight: ~18,333 kg (40,417 lb) to ~18,682 kg (41,188 lb)
Bucket Capacity: ~2.8–3.2 m³ (4.0–4.25 yd³)
Breakout Force: ~15,378 kg (33,903 lb)
Travel Speed: Up to ~40 km/h via PowerShift transmission
Makana rating
Owner rating
Market average
AED 850,000Starting from
AED 690,000John deere 644 Technical specifications
Loader
Breakout force
150.81 kN
General
Max dump height
2896 mm
Tire size
23.5 R25
Engine model
John Deere PowerTech PSS 6090
Transmission type
Powershift
Bucket capacity
3.06 cu m
Operating weight
18,682 kg
Service refill capacities
Hydraulic fluid cap
105.22 liter
Transmission fluid cap
23.09 liter
Front axle fluid capacity
22.33 liter
Fuel cap
397.05 liter
Rear axle fluid capacity
22.33 liter
Dimensions
Height - top of cab
3.44 m
Transport length
8 m
Turning radius
13.29 m
Wheelbase
3.26 m
Transport width
2 m
Operating specifications
Max dump reach
1615.44 mm
Brake system
Wet Multi Disc - Transmission
Engine
Alternator supplied amperage
130 Amh
Displacement
9001.43 cu cm
Emissions
Tier 4
Gross power
173.01 kw
Max torque
1062 Nm
Torque rise
56 %
Hydraulic system
Pump type
Piston
Pump flow cap
297.12 lpm
Relief valve pressure
250.97 bar
John deere 644 expert review
Overview
Heavy-duty loader built to last. Designed for high-output performance with engineering for uptime—Quad-Cool, payload options, and service accessibility.
Technology for uptime: Payload, LCD, PowerShift.
Fuel efficiency less than Tier 4 loaders.
Performance & Efficiency
Consistent breakout with smart thermal control and fast cycles via PowerShift transmission.
In Comparison
Volvo L110E offers smoother ride, Komatsu WA470-8 has larger bucket—Deere wins on support and uptime.
Verdict
For serious loader work where uptime, power, and simplicity matter—the 644K is a sharp pick. K-Series II adds newer emissions tech, but the original stays robust.
John deere 644 owner rating
2015-2019
Overall rating
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