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John deere 644K vs. Cat 938K Wheel loaders Comparison

Compare available technical data for Loaders. Find the right details to make your decision easier.

Comparison

Highlight differences

John Deere 644 Wheel loaders

644K

Cat 938 Wheel loaders

938K
Loader
Breakout force 150.81 kN
Breakout force 130 kN
Years 2015-2019
Years 2013-2025
Market Average AED 850,000
Market Average AED 590,000
Price AED 690,000
Price AED 280,000
General
Max dump height 2,896 mm
Max dump height 3,200 mm
Tire size 23.5 R25
Tire size -
Engine model John Deere PowerTech PSS 6090
Engine model Cat C7.1
Transmission type Powershift
Transmission type -
Bucket capacity 3.06 cu m
Bucket capacity 3.5 cu m
Operating weight 18,682 kg
Operating weight 17,500 kg
Bucket width -
Bucket width 3,000 mm
Lifting capacity -
Lifting capacity 6,500 kg
Max speed forward -
Max speed forward 38 kph
Tipping load -
Tipping load 13,000 kg
Service refill capacities
Hydraulic fluid cap 105.22 liter
Hydraulic fluid cap 135 liter
Transmission fluid cap 23.09 liter
Transmission fluid cap -
Front axle fluid capacity 22.33 liter
Front axle fluid capacity -
Fuel cap 397.05 liter
Fuel cap 325 liter
Rear axle fluid capacity 22.33 liter
Rear axle fluid capacity -
Dimensions
Height - top of cab 3.44 m
Height - top of cab 3.35 m
Transport length 8 m
Transport length -
Turning radius 13.29 m
Turning radius -
Wheelbase 3.26 m
Wheelbase 3 m
Transport width 2 m
Transport width -
Operating specifications
Max dump reach 1,615.44 mm
Max dump reach 1,150 mm
Brake system Wet Multi Disc - Transmission
Brake system -
Rack back angle -
Rack back angle 45 ยบ
Engine
Alternator supplied amperage 130 Amh
Alternator supplied amperage -
Displacement 9,001.43 cu cm
Displacement 7,100 cu cm
Emissions Tier 4
Emissions -
Gross power 173.01 kw
Gross power 150.63 kw
Max torque 1,062 Nm
Max torque 950 Nm
Torque rise 56 %
Torque rise -
Hydraulic system
Pump type Piston
Pump type Piston pump
Pump flow cap 297.12 lpm
Pump flow cap 220 lpm
Relief valve pressure 250.97 bar
Relief valve pressure 234.42 bar

Performance

Looking at performance technical specs and key features the John deere 644K Wheel loaders excels in terms of engine power at and operating weight 18682 compared to other models like the Cat 938K Wheel loaders.

User rating

Owners operators and fleet managers recommend the John deere 644K Wheel loaders for its high reliability and endurance in diverse applications. The same can be said about the Cat 938K Wheel loaders.

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build datetime: 3/9/2026, 7:55:59 AM