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

FeatureCaterpillar D4EDozerKomatsu D31EX-21 KOMSTAT IIDozer
TypeCrawler DozerCrawler Dozer
Horsepower55.9 kW55.9 kW
Operating Weight8820.0 kg7130.5 kg
Engine ManufacturerCaterpillarKomatsu
Engine Model3304SAA4D102E-2
Gross Power55.9 kW—
AspirationNaturallyTurbocharged with aftercooled
Displacement7000.6 cc3932.9 cc
Transmission TypePowerShiftDual Power Shift
Number of Forward Gears33
Number of Reverse Gears33
Max Speed Forward9.3 km/h8.5 km/h
Max Speed Reverse11.4 km/h8.5 km/h
Ground Pressure0.9 bar0.4 bar
Fuel Capacity238.1 l165.0 l
Cab Height271.3 cm271.3 cm
Width Over Track198.1 cm185.9 cm
Length Overall387.1 cm402.3 cm
Length without Blade320.0 cm—
Length of Track on Ground185.9 cm201.2 cm
Track Gauge152.4 cm146.3 cm
Ground Clearance36.6 cm39.6 cm
Ground Contact Area30989.6 cm³40902.2 cm³
No of Track Rollers Per Side55
Shoe Size33.0 cm40.6 cm
Weight (Operating)8820.0 kg7130.5 kg
Net Power—55.9 kW
Engine Oil Capacity—12.5 l
Cooling System Capacity—26.9 l
Hydraulic Capacity—46.9 l
Final Drives Capacity—3.4 l
Relief Valve Pressure—206.2 bar
No of Shoes Per Side—38
Track Pitch—144.8 cm
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