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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

FeatureJohn Deere 644H High LiftWheel loaderCaterpillar 938HWheel loader
TypeWheel LoaderWheel Loader
Horsepower134.2 kW134.2 kW
Weight17690.1 kg15054.7 kg
Tipping Capacity11249.1 kg11589.3 kg
Max Speed38.6 km/h43.1 km/h
Engine Model6081 H6.6 ACERT
No Of Cylinders66
AspirationTurbocharged with Aftercooler—
Displacement8128.0 cc6600.7 cc
Alternator Supplied Amperage55 amps80 amps
Operating Voltage24 V24 V
Rated Speed2200 RPM2200 RPM
Torque Speed1300 RPM—
Net Power134.2 kW134.2 kW
Gross Power152.9 kW146.9 kW
Peak Torque1010.1 N-m840.6 N-m
Fuel Capacity340.7 l247.2 l
Engine Oil Capacity25.4 l17.4 l
Cooling Capacity29.1 l36.0 l
Hydraulic System Capacity117.3 l89.0 l
Transmission Oil Capacity26.1 l43.2 l
Differential Front Capacity27.3 l57.2 l
Differential Rear Capacity27.3 l53.0 l
Transmission TypePower shiftPower shift
No of Forward Gears44
No of Reverse Gears33
Rear Axle Oscillation26 °24 °
Max Speed (Forward)38.6 km/h43.1 km/h
Max Speed (Reverse)26.4 km/h25.4 km/h
Pump typePiston pumpPiston
Pump Flow257.4 LPM294.9 LPM
Relief Pressure248.2 bar68.9 bar
Raise Lift Arms6.2 sec5.4 sec
Lower Lift Time3 sec2.7 sec
Bucket Dump Time1.4 sec1.4 sec
Operating Weight17690.1 kg15054.7 kg
Tipping Load11249.1 kg11589.3 kg
Bucket Capacity (Heaped)3.3 m³2.8 m³
Bucket Capacity (Struck)2.8 m³2.4 m³
Bucket Width304.8 cm274.3 cm
Breakout Force13866.3 kg12510.1 kg
Reach At Max Lift And Dump121.9 cm121.9 cm
Dump Clearance At Max Raise335.3 cm274.3 cm
Turning Radius548.6 cm1219.2 cm
Wheelbase304.8 cm304.8 cm
Bucket Hinge Pin457.2 cm396.2 cm
Cab Height335.3 cm335.3 cm
Overall Length853.4 cm731.5 cm
Ground Clearance61.0 cm30.5 cm
Width Over Tires274.3 cm274.3 cm
Tire Size20.5-2520.5 R25
Torque Rise—38 %
Stroke—12.7 cm
Bore—10.4 cm
Crankcase—17.4 l
Hydraulic Tank—89.0 l
Sourceheavyequipments.net archive (imported 2026-10)heavyequipments.net archive (imported 2026-10)
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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051